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Radiation dose reduction and image quality in pediatric paranasal sinus CT: with automatic tube current modulation and iterative reconstruction technique. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-09-19 Xiao-Fang Chen,Yi-Chi Zhang,Ning Ding,Li Liu,Yi-Ding Ji,Chao Zhang,Jing Chi
Our objective is to evaluate radiation dose and image quality in pediatric paranasal sinus computed tomography (CT) with automatic tube current modulation (ATCM) and sinogram-affirmed iterative reconstruction algorithm (SAFIRE). CT scans from 80 patients were divided into two groups: Group A [80 kVp, pitch 1.5, 40 mAs, the filtered back projection (FBP) algorithm] and Group B (70 kVp, pitch 3, ATCM
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Virtual reality training for radiation safety in cardiac catheterization laboratories - an integrated study. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-09-19 Asahi Fujiwara,Sota Fujimoto,Ren Ishikawa,Aoi Tanaka
The advent of fluoroscopically guided cardiology procedures has greatly improved patient outcomes but has also increased occupational radiation exposure for healthcare professionals, leading to adverse health effects such as radiation-induced cataracts, alopecia, and cancer. This emphasizes the need for effective radiation safety training. Traditional training methods, often based on passive learning
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Radiological impact assessment of natural radioactivity in soil and water in Cape Coast North, Central Region of Ghana Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-09-07 Ruth Araba Tawiah Annan, Moses Jojo Eghan, Joseph Kwabena Amoako, Francis Otoo, Dennis Kpakpo Adotey, Irene Opoku-Ntim, Charles Kansaana, Prince James Adeti
The objective of the study is to evaluate natural radioactivity and its radiological impact on the health of the populace within Cape Coast North. Soil and water samples were taken and analysed using a high purity germanium (HPGe) detector. Results for the average activity concentrations of 226Ra, 232Th, and 40K in soil samples range from 15.0 to 60.8 Bq/kg with a mean of 20.9 ± 7.2 Bq/kg, 16.3 to
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Energy resolution improvement in simplified alpha spectroscopy for radionuclidic purity tests on 225Ac production floors Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-09-05 Yuma Mihei, Kotaro Tani, Jun Ichinose, Kotaro Nagatsu, Masahiro Fukushi, Osamu Kurihara, Kazumasa Inoue
This study investigated the feasibility of a simplified method of alpha spectroscopy for radionuclidic purity tests at 225Ac production sites that eliminates the need for a vacuum chamber. The impact of enhancing the energy resolution using a collimator was evaluated through radiation transport simulations. The results showed that a full width at tenth maximum (FWTM) of <300 keV was achieved for alpha
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A performance comparison study between two HPGe lung counters with different detector configurations Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-09-05 Masayuki Naito, Yuki Tamakuma, Yuma Mihei, Kazuaki Yajima, Kotaro Tani, Eunjoo Kim, Munehiko Kowatari, Osamu Kurihara
This study compares the performance of old and new lung counters in the National Institutes for Quantum Sciences and Technology of Japan. The total sensitive area of the detector crystals for the new lung counter is ~15% smaller than that for the old lung counter. Minimum detectable activities (MDAs) for 241Am and 239Pu were evaluated through experiments using a Lawrence Livermore National Laboratory
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Radiation exposure to patients undergoing percutaneous transhepatic cholangiography and endoscopic retrograde cholangiography: an advanced phantom study. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-09-19 Duygu Tunçman,Eren Özgür,Ali Emre Nayci,Osman Günay,Fahrettin Fatih Kesmezacar,Songül Çavdar Karaçam,Güngör Üzüm,Mustafa Demir,Baki Akkuş,Wiam Elshami,Ghada Almisned,Huseyin Ozan Tekin
Fluoroscopic examinations like Endoscopic Retrograde Cholangiopancreatography (ERCP) and Percutaneous Transhepatic Cholangiography (PTC) are fundamental in diagnosing and treating hepatobiliary diseases. However, these procedures expose patients to significant radiation, highlighting the need for a detailed assessment of the radiation doses received by critical organs. The study's primary objective
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Assessment of foetal dose and occupational exposure for pregnant workers in nuclear medicine using the Taiwanese pregnancy phantom. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-09-19 Hao-Ting Chang,Yu-Chen Chang,Fang-Yuh Hsu,Ching-Han Hsu
For pregnant workers in nuclear medicine, radiation doses can pose a risk to their foetus. However, foetal radiation doses cannot be measured directly. In this study, a method of estimating foetal radiation doses was developed through simulations and measurements of phantoms of pregnant women in the three trimesters. The uterus and abdominal surface doses for monoenergetic photons (137Cs) and medical
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Establishment of a 241Am gamma calibration field based on international standards and its conversion coefficients. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-09-19 Tomoya Tsuji,Hiroshi Yoshitomi,Munehiko Kowatari,Yoshihiko Tanimura
A 241Am gamma (γ)-ray calibration field that meets the requirements for a γ-ray reference field as specified in the ISO 4037 standard series was established in the Facility of Radiation Standards of the Japan Atomic Energy Agency. The reference air kerma rates were measured using a reference ionization chamber calibrated by the N-80 quality X-ray calibration field of the national metrology standard
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Implantation of CRT pacemaker during pregnancy: estimated fetal radiation dose. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-09-19 Anna-Leena Manninen,Jukka Järvinen,Joanna Sierpowska,Timo J Mäkelä,Tuomas T Rissanen
The benefits of a cardiac resynchronization therapy (CRT) implantation are known in severe heart failure and its implantation may also be considered during pregnancy to ensure safe pregnancy and delivery for both the mother and the fetus. This study on a patient case aimed to estimate the absorbed dose (AD) to the fetus during the CRT implantation of 21st week of the pregnant woman. AD measurement
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Evaluation of electric field (E) exposure levels and its relationship with the sleep quality of residents around the BTS antennas in Sabzevar, Iran. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-09-19 Hassan Malvandi,Majid Fallahi,Mohammad Hossien Saghi,Nasrin Hassanzadeh
Mobile devices and base transceiver station (BTS) are the main sources of human exposure to radio frequency electromagnetic fields (RF-EMFs). Therefore, the aim of the present study was to evaluate the levels of exposure to RF-EMF in three different time intervals and three different distances from BTS antennas in Sabzevar. Additional goals were to investigate the electric field (E) difference between
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Assessment of safety culture in radiotherapy facilities using safety performance indicators Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-08-30 Smriti Sharma, Mahalakshmi Sivaramakrishnan, Arti Tripathi, Pramod Kumar Dixit, Namitha Krishnakumar, Ghanshyam Sahani, Pankaj Kumar Dash Sharma, Sunil Dutt Sharma
This paper describes the development of the Safety Performance Indicators (SPIs), the methodology for assessment of the safety culture of radiotherapy institutions using SPIs and common strengths and common areas for improvement. SPIs were categorized into eight sections which all together contain 23 attributes and each attribute has scoring criteria from 0 to 2 (in steps of 0.5). The maximum absolute
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Dose estimation in patients from different protocols of 18F-FDG PET/CT studies and analysis of optimization strategies Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-08-29 Pooja Dwivedi, Ashish Kumar Jha, Sneha Mithun, Viraj Sawant, Vishal Vajarkar, Manoj Chauhan, Sayak Choudhury, Venkatesh Rangarajan
This study aimed to evaluate the dose in different protocols of 18F-2-fluoro-2-deoxy-D-glucose positron emission tomography/computed tomography (PET/CT) procedure. The retrospective study involves 207 patients with confirmed malignancies who underwent PET/CT. Effective dose (E) from PET was estimated based on injected activity and dose coefficient as per International Commission on Radiation Protection
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Assessment of radiation dose values in common orthopaedic trauma examinations performed under X-ray fluoroscopy guidance Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-08-28 Tristan Genetay, Axel Gamulin, Arnaud Lorimier, Marta Sans Merce
This study aims to provide radiation reference levels in orthopaedic surgery. A total of 753 procedures were collected within 1 y. Categories containing several similar procedures were created based on four criteria: same anatomical area, same level of complexity, only single procedures, and at least 10 cases per category. Exposure was defined in terms of air kerma-area product, fluoroscopy time, and
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Computed tomography numbers obtained for varying iodine contrast concentrations by different-generation dual-energy computed tomography scanners Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-08-22 Tomokatsu Tsukamoto, Takanori Masuda, Takashi Takahata, Yoshinori Kawamoto, Osamu Uenaka, Hiroki Mori
We compared the computed tomography (CT) numbers from monochromatic images obtained using the first-generation (Discovery CT750 HD: GE Healthcare, Milwaukee, WI) and second-generation (Revolution CT: GE HealthCare) dual-energy CT (first and second DECT) scanners in phantom and clinical studies. In a polypropylene phantom, eight polypropylene tubes containing iodine at various concentrations (0.5, 1
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Correction factors for induced radioactivity: comparing simplified continuous and periodic irradiation scenarios in medical cyclotron decommissioning Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-08-22 Po-Wen Fang, Rong-Jiun Sheu
The use of a Monte Carlo code in the assessment of residual radioactivity for decommissioning of a medical cyclotron facility requires a reasonable approximation to the facility’s history of operations. A periodic irradiation scenario simulating the cyclotron’s daily operation for radioisotope production is generally considered reasonable, but its implementation in the code’s input file can be cumbersome
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Correction to: Dose, dose, dose, but where is the patient dose? Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-08-09
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Analysis of the relationship between ambient dose, ambient dose equivalent and effective dose in operational neutron spectra. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-08-09 Akira Endo
This study examines the relationship between ambient dose H*, ambient dose equivalent H*(10), and effective dose E for external neutron irradiation over 163 operational spectra from different workplaces. The results show that H* provides a reasonable estimate with a controlled margin, even if overestimated, to assess E compared with H*(10), which can lead to a significant overestimation or underestimation
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Simultaneous indoor radon/thoron and in situ outdoor gamma dose measurements and estimation of annual effective dose in a tin mining area of Jos Plateau, Nigeria. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-08-09 Jasini Waida,Oyebode A Oyeleke,Janet A Ademola
Radon, a radioactive gas can increase the risk of lung cancer when breathe in. Indoor Rn-222 and Rn-220 concentrations were determined using passive radon monitor in some dwellings in a Sn mining area of Jos Plateau. Outdoor gamma radiation was also measured with a hand-held survey meter. The range of Rn-222 and Rn-220 concentrations was from 7-53 Bq m-3 to 41-267 Bq m-3 with averages of 27 ± 17 and
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Radiation protection adherence and associated factors among radiology personnel. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-09-10 Amirhossein Fathabadi,Shabnam Oloomi
The aim of the study was to investigate radiation protection adherence among radiology personnel and associated factors. In light of the increasing integration of ionizing radiation in medical diagnostics and treatment-specifically in areas such as computed tomography, fluoroscopy, and therapeutic radiology-it is vital for radiology personnel to consistently uphold rigorous radiation protection standards
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Evaluation of patients’ radiation doses and establishment of institutional diagnostic reference levels in nuclear medicine in Oman Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-08-01 Fadheela Ebrahim, Aziza Aljabri, Amal Alhaji, Bader Aldebasi, Abbasher Gismelseed, Yassine Bouchareb
This study aimed to develop diagnostic reference levels (DRLs) in Single Photon Emission Computed Tomography/Computed Tomography (SPECT/CT) and Positron Emission Tomography/Computed Tomography (PET/CT) imaging for the most frequent SPECT/CT and PET/CT examinations performed at our institution. A total of 1134 adult patients, who have undergone SPECT/CT and PET/CT scanning over a period of 4 years (2018–2021)
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Feasibility study of shielded diode detector for small field dosimetry. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Resmi K Bharathan,Irfana Thasni,Musthafa Musthafa,Suja Cheruliyil Ayyappan,Silpa Ajaykumar,Lisha Jose
Improved imaging techniques and modern radiotherapy treatment delivery in the treatment field are reduced to the precise size of the tumor, which necessitates the need for small-field dosimetry. Dosimetry in small-field dosimetry is challenging because most of the available code of practice for dosimetry is based on the cavity theory concept. Some small-sized detectors show good spatial resolution
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Radon levels in Bengaluru during monsoon season. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Charan Kumar Kachintaya,Kamsali Nagaraja
A study on the dynamics of Radon and meteorological parameters was conducted in Bengaluru (12056'44'' N, 77030'25″ E, 840 m AMSL) during monsoon of 2014. All measured parameters exhibited a clear diurnal pattern, except for pressure, and are attributed to morning temperature inversion and afternoon enhanced vertical mixing. Concentration of Radon is higher during north eastern monsoon compared with
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Assessment of radiation dose due to 238U, 226Ra, 222Rn and 210Po in groundwater of Kodagu district, India. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Shivachara Nandish Namitha,Bevinathalapura Shankarappa Kempalingappa Lavanya,Mohamed Hidayath,Mavinkere Shivanand Sumanth,Kirugunda Siddaraju Pruthvi Rani,Mallupura Shrirangaiah Chandrashekara
Natural radionuclides are universally spread and can be found in varying levels in rock, soil and water depending on the geology. A potential health threat may be caused by them to humans on consumption of water, food and inhalation of air due to the presence of radionuclides. In the present study, an attempt has been made to study the distribution of 238U, 226Ra, 222Rn and 210Po in groundwater samples
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Assessment of natural radioactivity concentration in the soil samples from the Churchandpur and Ukhrul districts of Manipur, India. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Thiyam Priya Devi,Thokchom Dewan Singh,Brahmacharimayum Arunkumar Sharma,Sarangthem Nabadwip Singh,Rakesh Singhal
The natural radioactivity concentration was studied for 40 soil samples of the Churchandpur and Ukhrul districts of Manipur, India, by using gamma-ray spectroscopy. The average radioactivity concentration of 226Ra, 232Th and 40K in Churchandpur was found as 39.9 (range: 30-56), 72.1 (range: 57-93) and 564.1 (range:360-867) Bq kg-1 respectively, whereas, in Ukhrul, average radioactivity for the same
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Role of independent research at AERB for ensuring safety of nuclear facilities in India. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Dinakrushna Mohapatra
The mission of Atomic Energy Regulatory Board (AERB) of India is to ensure that the use of ionising radiation and nuclear energy in India does not cause unacceptable impact on the workers, members of the public and to the environment. AERB has the mandate to carry out detailed safety review for the siting, construction, commissioning, operation and decommissioning of nuclear and radiation facilities
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Analysis of 115In(n,γ)116mIn reaction cross-section and covariance for 13.52 MeV and 14.54 MeV neutron induced energies. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Sunitha Aladahalli Madegowda,Rudraswamy Basavanna,Kamsali Nagaraja
Neutron induced reactions play a vital role in the field of nuclear and particle physics. An effort was made to study the neutron-induced reaction cross-section of 115In(n,γ)116mIn with 197Au(n,γ)198Au as monitor reaction and carried out the reaction for the neutron energies of 13.520 ± 0.005 and 14.54 ± 0.24 MeV. The neutrons obtained from the D-T fusion reaction of Purnima neutron generator were
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Measurement of natural radioactivity levels in soil samples of Bidar district, Karnataka, India. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Rajesh Siddanna Mugalgaon,Archanadevi Rajesh Mugalgaon,Basavaraj Rachappa Kerur
Natural radioactivity measurement, radiation monitoring of the region, dose assessment and interpretation of radiological-related parameters are crucial aspects from the public awareness and environmental safety point of view. The ionising radiations (gamma-rays) emitted from radionuclides such as 226Ra, 232Th and 40K present in environmental materials contributes significantly to the external radiation
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Influence of 60Co gamma radiation on the structural, morphological and optical properties of hydrothermally synthesized MoO3-CeO2 nanocomposite. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Asha P Shirni,Madhura N Talwar,Sweekar B R,Gnana Prakash Akkanagouda Patil
The influence of 60Co gamma radiation on Molybdenum Oxide-Cerium Oxide (MoO3-CeO2) nanocomposite is investigated in the present study. The MoO3-CeO2 nanocomposite was synthesized by conventional hydrothermal route. Ammonium hepta molybdate tetrahydrate [(NH4)6Mo7O24.4H2O] and cerium nitrate [Ce (NO3)3.4H2O] were used as the precursors. The composite was subjected to high energy gamma irradiation for
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Assessment of naturally occurring radionuclides in surface soil and drinking water from western part of Yadgir district Karnataka, India. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Archanadevi R Mugalgaon,Rajesh S Mugalgaon,Basavaraj R Kerur,Shesha Suresh
Radionuclide activity of the selected radionuclides 238U, 232Th and 40K was measured in surface soil samples collected from 40 villages of the western part of Yadgir district of Karnataka. A 4″ × 4″ NaI (Tl) detector based on a gamma spectrometer is used for the estimation of radionuclides. The major type of soil in this region is sandy and red. The 222Rn activity concentrations in drinking water were
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Mapping of uranium concentrations in groundwater samples of Davanagere district, Karnataka, India, and assessment of effective dose to the population. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Mohamed Hidayath,Bevinathalapura S K Lavanya,Shivachara N Namitha,Mallupura S Chandrashekara,Sundar Achuta Pandit
The geomorphology, geohydrology, lithology and ecological features of the area influence the uranium content in groundwater. The groundwater samples were collected from 75 locations of Davanagere district, Karnataka, India. Uranium analysis in the water samples was done using LED fluorimeter, based on fluorescence of dissolved uranyl salts. The uranium concentration in water samples varied from 18
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Studies on uranium concentration in groundwater samples and its associated health hazards to the residents of surrounding regions of Manchanabele reservoir, Bengaluru, Karnataka, India. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Donakuppe N Deepika,Madalakote R Ambika,Karunakara Naregundi,Sudeep Kumara,Kanishettyhalli Nagaraja V Kumar,Ningaiah Nagaiah
Uranium occurs naturally in groundwater and surface water. Being a radioactive element, high uranium concentration can cause impact on human health. The health effects associated with consumption of uranium through water includes increased cancer risk and kidney toxicity. In view of this, an attempt was made in the present study to establish the level of radiological and chemical toxicity of uranium
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Dose and transfer factor ofn 40K in medicinal plants. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Chandrashekara Kulal,Gunakara Surathkal,Somashekarappa H Mallaiah
The presence of naturally occurring radionuclides is common in all living and non-living frameworks, which are part of our environment. The activity concentration of 40K radionuclide was estimated using gamma spectrometry in some medicinal plants and transfer factors (TF), and Average Annual Committed Effective Dose (AACED) was evaluated. The standard methods were followed in the process of sample
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A study of 222Rn/220Rn exhalation rate and indoor 222Rn/220Rn levels in higher Himalayan terrain. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Rohit Singh Sajwan,Veena Joshi,Naresh Kumar,Taufiq Ahamad,Sanjay Dutt,Bevinathalapura Shankarappa Kempalingappa Lavanya
The noble radioactive gas radon and its isotope thoron dominate terrestrial radiation in the indoor environment. These gases eventually disintegrate generating radioactive ions that readily adhere to aerosol particles. This study was conducted in a tectonically active location with significant radon concentrations. The obtained average values of radon mass exhalation and thoron surface exhalation rate
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A digital volume pulse device-finger photo pulse plethysmography to trace the vascular integrity amongst the low back pain subjects with lumbar disc degenerative diseases diagnosed by MRI analysis. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Chidambaran K Sreeja,Vimala K N P M Devi,Mangalasseril K Aneesh,Kavitha S Sreekanth
Finger photo pulse plethysmography is a simple, inexpensive and non-invasive method for measurement of arterial stiffness. The objective is to assess the correlation of arterial stiffness in low back pain subjects with lumbar disc degeneration. Thirty-four back pain patients of both sexes in age group of 30-65 were included. Anthropometric measures like height, body weight, body mass index (BMI) were
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Study on seasonal variation of radon, thoron, and their progeny levels in indoor environments and their radiological effects on human health. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Erathimmaiah Srinivasa,Shesha Suresh,Devagondanahalli Rangegowda Rangaswamy,Jadiyappa Sannappa
Indoor radon (222Rn), thoron (220Rn) and their progeny concentrations have been measured in different types of buildings at different locations in different dwellings in different seasons in Hassan city, Karnataka, using time-integrated passive radon dosemeters containing LR-115 Type II solid-state nuclear track detectors. The annual effective dose due to radon and thoron has been estimated. The activity
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Measurements of radon exhalations and radiological doses using LR-115 (II) nuclear track detectors in Tiru region of the Naga Schuppen Belt, India. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Pranjal Protim Gogoi,Sarat Phukan,Debajyoti Barooah
In this present study, the nuclear track detector LR-115 (II) was employed to assess radon (222Rn) exhalation rate, effective radium (226Ra) content, and the annual effective dose from coal and soil samples collected in and around the coal mining area of Tiru region of Nagaland, India. The 222Rn mass and surface exhalation rates and 226Ra contents were found to be in the ranges of 7.3-17.3 mBq kg-1
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60Co gamma radiation effects on NPN transistor at cryogenic temperature. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Darshan Muddubasavanna,Arshiya Anjum,Pushpa Nagaraj,Gnana Prakash A Patel
The 60Co gamma radiation effects on the DC electrical characteristics of silicon NPN transistor were studied in the dose range of 100 krad to 6 Mrad at room temperature (300 K) and cryogenic temperature (77 K). The measurements were carried out at both 300 and 77 K temperature. The electrical characteristics such as Gummel characteristics, excess base current (ΔIB), current gain (hFE), transconductance
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Neutron spectrum measurements near KAMINI reactor south beam vault door using nested neutron spectrometer. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 D Venkata Subramanian,Adish Haridas,D Sunil Kumar,G Pandikumar,A John Arul
KAlpakkam MINI reactor (KAMINI) is a 233U fuelled research reactor has various neutron irradiation locations for experimental purposes. The pit at the south beam end of KAMINI reactor is being extensively utilised for neutron attenuation experiments in prospective shielding materials as well as for neutron radiography. During reactor operation, it will be closed by a movable shield. A vault door is
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Measurement of indoor radioactivity and dose derived from 222Rn, 220Rn and EECs by using SSNTD based technique. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Taufiq Ahamad,Om Prakash Nautiyal,Manish Joshi,Prakhar Singh,Rohit Singh Sajwan,Anand Singh Rana,Abhay Anand Bourai
Alpha flux radiated from 222Rn, 220Rn and progeny is the primary contributor of natural radioactivity to the inhabitants in the ambient atmosphere. The annual indoor 222Rn and 220Rn concentrations were found to be 85 ± 43 and 84 ± 36 Bq m-3, respectively. The estimated annual indoor 222Rn and 220Rn concentration is below to reference value of 100 Bq m-3 suggested by WHO. The calculated annual inhalation
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Radiation dose due to uranium in groundwater to the population of Chamarajanagar district, Karnataka, India. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Bevinathalapura Shankarappa Kempalingappa Lavanya,Shivachara Nandish Namitha,Smithri Manilal,Malay Ghosh,Mallupura Shrirangaiah Chandrashekara
This paper presents the concentration of uranium in 67 groundwater samples of Chamarajanagar district, Karnataka, India, estimated using an LED fluorimeter. The age-dependent ingestion dose to the population of the district is also studied. The concentration of uranium in groundwater varied from 0.20 to 57.50 μg L-1 with an average of 4.40 μg L-1. The annual ingestion dose due to uranium varies from
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Gamma-ray shielding characteristics of concrete containing different percentage of ceramics for different energies. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Ashwitha Chikkegowda,Lingaraj Adarsh Raj,Sankarshan Belur Mohan,Krishnaveni Sannathammegowda
To shield people from dangerous gamma radiation, it is imperative to fabricate inexpensive and environmentally friendly materials. In the present work, suitability of concrete with various % concentrations of ceramics as gamma-ray shielding material has been studied. In this regard, concrete mixture using M-sand and cement with ceramic as filler in different concentrations has been prepared. The mass
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Effect of 60Co gamma irradiation on hydrothermally synthesized Ga2O3-Tio2 nanocomposites. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Madhura N Talwar,Asha P Shirni,Sweekar Baradekoppa Ramesh,Gnana Prakash Akkanagowda Patel
The effect of 60Co gamma irradiation on gallium oxide and titanium oxide (Ga2O3-TiO2) nanocomposites are investigated in the present study. The Ga2O3-TiO2 nanocomposite was synthesized by hydrothermal method at 120°C. The precursors for the synthesis consist of gallium nitrate anhydrous and titanium trichloride along with sodium hydroxide to achieve the pH of 9. The synthesized Ga2O3-TiO2 was subjected
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Multifiller-based polymer composites for shielding high energy ionising radiation. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Madalakote Rajanna Ambika,Sherry S Kuttukaran,Ningaiah Nagaiah,Raveendra Melavanki,Shivappa K Shashi Kumar,Santosh Kumar Suman
Polydimethyl silicone rubber-based polymer composites filled with molybdenum and bismuth were fabricated using simple open mold cast technique. The physical and chemical structure and gamma shielding parameters like attenuation coefficient, half-value layer (HVL) thickness and relaxation length have been investigated for the said novel materials using X-ray diffraction (XRD), Fourier transform Infrared
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Distribution of 210Po activity and soil texture in agricultural soil. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Meril Charles,Ebin Thomas,Ruchila Chandran,Rita Crasta,Kamalakar Vaijinathrao Dawalekar,Narayana Yerol
The assessment of 210Po in agricultural soil matrices in different regions of Kerala and Karnataka was studied. The wet ash method was used to find the activity concentration of 210Po. The alpha activity was counted using a silver-activated zinc sulfide counter of 30% efficiency, and the activity was calculated. The average concentration of 210Po activity in soil samples ranged from 0.09 to 20.52 Bq
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Monitoring of terrestrial gamma dose rate from the Kumaun Himalayan region of the Bageshwar district in Uttarakhand, India. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Kiran Patni,Krishna P Singh,Manjulata Yadav,Ashutosh P Pande
The present study is carried out in 42 sampling sites for the measurement of background gamma dose rate in six tehsils of the Bageshwar district that comes under the Kumaun Himalaya, Uttarakhand. The annual effective dose in the pre-monsoon and post-monsoon seasons was estimated from the measured values of the Gamma dose rate. It is found that the minimum and maximum values ranged between 0.01-0.39
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Time-series analysis of radon concentrations for Bengaluru's atmosphere. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Charan Kumar K,Kamsali Nagaraja
The Fast Fourier Transform (FFT) analysis of the activity concentration of radon and selected meteorological parameters was carried out at Department of Physics, Bangalore University, Bengaluru (12056'44"N, 77030'25″E, 840 m above MSL). All of the measured parameters, with the exception of pressure, showed a clear diurnal trend, which can be explained by the presence of typical atmospheric processes
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An investigation of 60Co gamma radiation induced damage in N-channel MOSFETS at cryogenic temperature. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Arshiya Anjum,Darshan Muddubasavanna,Pushpa Nagaraj,Gnana Prakash Akkanagowda Patel
N-channel depletion metal oxide semiconductor field effect transistors (MOSFETs) were irradiated with 60Co gamma radiation in the dose range of 100 krad to 6 Mrad at cryogenic (77 K) and room temperatures (300 K). The MOS devices irradiated at 77 K and 300 K were characterized at 77 K and 300 K respectively. The different electrical parameters of MOSFET such as threshold voltage (Vth), density of interface
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Carbon-based brilliance: a novel approach to renewable energy in radiotherapy centers. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Pitchaikannu Venkatraman,Lalit Mohan Aggarwal,Sunil Choudhary
The energy produced from other sources which does neither come from fossil fuels nor contribute in the production of any greenhouse effects that causes climate changes is called as 'Alternative Energy'. Since our world's primary energy sources such as coal, oil and natural gases are exploited to a greater extent, we are in an urge to switch to an alternative energy. Scattered radiation, a common byproduct
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Assessment of indoor radon concentration in the dwellings of the industrial areas of Kannur District, Kerala. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Vamanan Prakash,Nagathil Neeraja,Keereerakath Nadira Mahamood
All organisms on the earth-crest are exposed to natural background radiation since the evolution of the earth, as many environmental matrices such as soil, air, water bodies, vegetation, etc., act as the sources of natural radioactivity. The present study deals with the evaluation of indoor concentration of 222Rn (radon) in different dwellings with various construction materials used for the roof and
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Determination of uranium isotopes in ground water by alpha spectrometry and associated age-dependent ingestion dose. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Malay Ghosh,Smithri Manilal,Ganesh Gurunathan
Determination of uranium isotopes in ground water plays a key role in assessment of geochemical condition of ground water and for estimating ingestion dose received by the general public because of uranium intake through drinking water. An attempt has been made in the present study to estimate isotopic composition and activity ratios (AR) of uranium isotopes by analysing the ground water samples using
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Assessment of radiation dose due to 210Po in water and food samples of Chamarajanagar district, Karnataka, India. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Bevinathalapura S K Lavanya,Shivachara N Namitha,Mohamed Hidayath,Mallupura S Chandrashekara
Groundwater is in direct contact with the soil and rocks that dissolve many compounds and minerals including uranium and its daughter products. 210Po is one of the decay products of 238U series that cause internal radiation dose in humans when consumed in the form of water and food, including sea food. Therefore, activities of 210Po have been studied in ground and surface water, and in food samples
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Methodology for shielding design and evaluation for container scanners. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Thokchom D Singh,Rajib L Sha,Ranjankumar K Singh,Ghanshyam Sahani,Pankaj Tandon,Pankaj Kumar Dash Sharma
There has been an increase in the use of high energy photon beam for container scanners in many countries for multi purposes such as detecting high atomic number materials which might be nuclear materials, drugs, high explosive materials and other contrabands etc. High energy photon beams generally 6 and 9 MV can be used for scanning such materials. However, it is important to ensure that radiation
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Assessment and mitigation of radiation hazard for individuals engaged in reconnaissance survey in uranium exploration in Jharkhand, India. Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Ankur Trivedi,S Nilanchal Patra,Hanumant Bihari Shrivastava,Uday Kumar,Kalyan Chakrabarti,Deepak Kumar Sinha
The present study attempts to obtain an a priori estimate of the absorbed dose received by an individual engaged in the reconnaissance survey in Uranium exploration using a predictive mathematical regression analysis. Other radiation safety parameters such as excess lifetime cancer risk are also calculated. Study reflects that the proper handling of naturally occurring radioactive materials accounts
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Contributions of Prof. P. Venkataramaiah to the research on radiation physics and education in India Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Puttaiah Venkataramaiah, Karinanjanapura Subbanna Mallesh, Ningaiah Nagaiah, Syed Abdul Bari, Mididoddi Venkateshwarlu, Mullapalli Vasudev, Kamsali Nagaraja, Sreemathi Hariprasad, Bhagyalakshmi Neelwarne
Prof. P. Venkataramaiah (P.V.), born on July 08, 1937, has been active in research for the past five decades in several areas of Nuclear Physics and Environmental Sciences. He has visited several Universities and research institutes in various countries such as Japan, Hong Kong, Singapore, France, the UK, Canada and the USA. Apart from research work he has also held many administrative positions and
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Latent fingerprint imaging using irradiated novel mixed metal oxides (MXOY, M = Ba, Zn, Al, Ce) nanophosphor Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Chandrakala S Seegur, Mallikarjunaswamy Chandrashekaraiah, Madhura N Talwar, Asha P Shirni, Gnana Prakash Akkanagowda Patel
Latent fingerprint developed at the site of crime is considered as crucial physical evidence in forensic investigation. The mixed metal oxides (MXOY, M = Ba, Zn, Al, Ce) nanophosphor was synthesised by irradiating the precursor solution with 60Co gamma radiation followed by solution combustion method. The structural, morphological, optical characteristics and fingerprint imaging were studied using
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Measurement of radon exhalation rate and radiation doses in fly ash samples Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Anil Sharma, Pragya Pandit, Asha Attri, Sanigdha Acharya
Coal based thermal power plants contribute about ~ 72% of the power generation in India. Indian coal is of bituminous type, having a high ash content with 55–60% ash. Due to considerable environmental importance the collected fly ash has become a subject of worldwide interest in recent years. In the present study radon exhalation rate and the activity concentration of 226Ra, 232Th and 40K radionuclides
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Comparison of TL characteristics of natural quartz and zircon Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 A Ashok Kumar, B Sundarakannan
The dosimetry of different minerals is carried out to investigate the dose received by the population in case of a nuclear accident. Retrospective dosimetry is a field where there is a continuous search to find new materials. Beach sand minerals, namely quartz and zircon, were exposed to beta and gamma radiation and studied separately. A comparison of the thermoluminescence (TL) output of different
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Gamma-ray interaction studies of concrete with waste glass fillers Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Ashwitha Chikkegowda, Lingaraj Adarsh Raj, Sankarshan Belur Mohan, Sannathammegowda Krishnaveni
In the present work, the efficacy of waste glass as fillers in concrete for gamma-ray shielding has been studied. Glass fillers of 0, 15, 30, 45, and 60% concentrations have been incorporated into the concrete mixture. The attenuation measurements were performed using gamma spectrometer with NaI(Tl) detector at 511, 662, 1173, and 1332 keV gamma energies. Gamma-ray shielding parameters, such as the
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Study on polymer composites with glass for gamma ray shielding Radiat. Protect. Dosim. (IF 0.8) Pub Date : 2024-07-17 Ashwitha Chikkegowda, Lingaraj Adarsh Raj, Sankarshan Belur Mohan, Sannathammegowda Krishnaveni
The shielding of gamma radiation is of the utmost importance in industries, such as nuclear power plants, medical imaging, and space exploration. For the purpose of shielding objects in such an environment, it is essential to design materials with flexibility as well as high shielding capability. In order to enhance the radiation attenuation effectiveness of polymers, such as polyvinyl alcohol (PVA)