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Simulated Annealing Method for the Automated Simulation of DNA Dynamics in the HhaI Protein Binding Site Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2023-10-5 Kari Pederson, Michael Groves, Gary P. Drobny
Solid-state deuterium NMR is well suited to the study of the conformational dynamics of DNA. Deuterium quadrupole echo spectra for a particular motional model can be calculated and matched to the experimental spectrum to extract information on the DNA dynamics; however, doing so can be very time-intensive. The two-axis motion used to model the dynamics of either 2″ or 5′/5″ furanose ring deuteron is
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Comfortable Nursing in the Intraoperative MRI Evaluation Combined with Microsurgery in the Treatment of Functional Area Glioma Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2023-5-30 Tong Shen, Ran Wang, Xin Zhao, Lin Wang, Ying Li, Ting Liu
This study was aimed to investigate the application value of magnetic resonance imaging (MRI) scanning examination in the preoperative treatment of functional glioma and to analyze the application effect of nursing intervention in the operating room in the treatment of fiber surgery. In this study, 80 patients with functional glioma were included as research objects and randomly rolled into the control
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Effect of Early Nursing Intervention under Amplitude-Integrated Electroencephalography and Magnetic Resonance Images on Brain Injury in Premature Infants Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2023-5-15 Aiyan Liu, Huangai Zhang, Wei Guo
To investigate the effects of early nursing intervention on brain injury among premature infants, 100 premature infants diagnosed with brain injury were included in the research and randomly divided into the control group (50 cases) and the experimental group (50 cases). The patients in the two groups were performed with the same conventional comprehensive treatment. The patients in the control group
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Multislice B1 Mapping Method Using Magnetic Resonance Composite Spin Echo Sequences and Simultaneous Echo Refocusing Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2023-4-13 Suchit Kumar, Kyu Chan Lee, Jong-Min Kim, Jeung-Hoon Seo, Chulhyun Lee, Chang-Hyun Oh
Radiofrequency (RF) transmit field (B1) mapping is a promising method in mitigating the B1 inhomogeneity in various magnetic resonance imaging (MRI) applications. Although several phase- or magnitude-based B1 mapping methods have been proposed, these methods often require complex modeling, long acquisition time, or specialized MRI sequences. A recently introduced simultaneous echo refocusing (SER)
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Dynamics of Pair of Entangled Spin-1/2 Particles and Quantification of the Dynamics in terms of Correlations Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2023-4-8 Venkata Satya Surya Phaneendra Pydimarri, Timothy R. Field
The dynamics of an identical pair of entangled spin-1/2 particles, both subjected to the same random magnetic field, are studied. The dynamics of the pure joint state of the pair are derived using stochastic calculus. An ensemble of such pure states is combined using the modified spin joint density matrix, and the joint relaxation time for the pair of spin-1/2 particles is obtained. The dynamics can
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Magnetic Resonance Imaging Characteristics of Brain Structure and Neuroendocrine Changes in Patients with First-Episode Schizophrenia Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2023-4-3 Kai Yang, Xianxiang Zeng, Li Hu, Jinhong Chen, Weiwei Zhu, Yu Wang, Xiaoxiong Zhao
This research was aimed to investigate the magnetic resonance imaging (MRI) features of brain structure and neuroendocrine levels in patients with first-episode schizophrenia. 25 hospitalized patients with first-episode schizophrenia were selected as the observation group, while 25 healthy people were selected as the control group. All the objects underwent MRI examination, and the images as well as
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Analysis of Changes in Brain Region and Connectomics in the Acute Stage of Sudden Sensorineural Hearing Loss in the Resting State via Functional Magnetic Resonance Imaging Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2023-2-25 Zhonghua Li
To explore the functional changes in the whole brain network in patients with sudden sensorineural hearing loss (SHL) at the acute stage from functional magnetic resonance imaging (fMRI) imaging evaluation results, 80 patients with sudden right SHL were selected as subjects (patient group). In addition, 40 healthy volunteers who underwent physical examination in the hospital during the same period
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Magnetic Resonance Diffusion-Weighted Imaging to Evaluate the Clinical Efficacy of CalliSpheres Drug-Loaded Microspheres in the Treatment of Advanced Bladder Cancer Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2023-2-10 Xi Yang, Wei Chen
The MR diffusion-weighted imaging technique was used to evaluate the efficacy and safety of CalliSpheres drug-loaded microspheres for transarterial chemoembolization in the treatment of advanced bladder cancer. 35 patients with advanced bladder cancer were treated with CalliSpheres DLMS for transarterial chemoembolization. Imaging techniques such as magnetic resonance (MR) diffusion-weighted imaging
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Super-Resolution Reconstruction Algorithm-Based MRI Diagnosis of Prostate Cancer and Evaluation of Treatment Effect of Prostate Specific Antigen Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2022-10-15 Biao Liu, Rongping Tan, Baogao Tan, Chenhui Huang, Keqin Yang
MRI of prostate cancer (PCa) was performed using a projection onto convex sets (POCS) super-resolution reconstruction algorithm to evaluate and analyze the treatment of prostate-specific antigen (PSA) and provide a theoretical reference for clinical practice. A total of 110 patients with PCa were selected as the study subjects. First, the modified POCS algorithm was used to reconstruct the MRI images
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Clinical Observation of Modified Implantation of ASD Closure Device to Treat BPFs Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2022-10-12 Yangfei Lu, Jisong Zhang, Enguo Chen, Kejing Ying
Objectives. The aim of the paper is to explore the clinical efficacy and prognosis of the modified implantation of atrial septal defect (ASD) closure device to treat bronchopleural fistulas (BPFs). Methods. This paper has reviewed the results of 13 BPF patients implanted with a modified ASD closure device in Shaw Hospital Affiliated with the Medical College of Zhejiang University from October 2018
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Quantum Derivation of the Bloch Equations Excluding Relaxation Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2022-10-10 Eric R. Johnston
The equation of motion of the density matrix of an ensemble of identical spin-1/2 nuclei subject to a rotating-frame radiofrequency field and Zeeman frequency offset is derived from the Schrodinger equation and shown to be equivalent to the magnetization differential equations originally proposed by Bloch (excluding relaxation). The quantum and classical differential equations are then integrated.
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MRI Features and Significance of Serum miRNAs and Inflammatory Cytokines in Patients with Temporal Lobe Epilepsy Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2022-10-4 Nengyun Yao, Yanmei She, Songlin Tang, Huafei Liu, Fang Liu
This study was aimed to investigate the changes of brain MRI features and serum biological parameters in patients with TLE. 30 patients with unilateral TLE confirmed by surgical pathology were selected as study subjects, and 30 subjects without a history of epilepsy who underwent health examinations during the same period were selected as controls. The brain MRI features of the patients were explored
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Efficacy Evaluation of Modified Siwu Decoction to Treat Osteoporosis in Patients with Poststroke Hemiplegia by Using the Magnetic Resonance Imaging Features Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2022-09-01 Jing Wang, Xiuyun Liu, Yanni Chen, Bingjie Zhang, Yi Peng, Zhipeng Sun, Tao Yang
This study was focused on the clinical efficacy and safety of magnetic resonance imaging (MRI)-based Siwu decoction for poststroke hemiplegia complicated with osteoporosis. 120 patients with poststroke hemiplegia and osteoporosis were divided into an observation group (modified Siwu decoction based on the treatment scheme of control group, 60 cases) and a control group (conventional drugs in neuro
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Profiling of Plant Derived Natural Constituents by Using Magnetic Resonance Techniques Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2022-08-08 Anupama Anand, Anshu Sharma, Harpreet Kaur Saini, Somesh Sharma, Ruchi Sharma, Chahat Thakur, Priyanka, Maria Atanassova, Gianluca Caruso, Ardalan Pasdaran
Plants are reservoirs of naturally occurring chemical constituents with a wide range of structural diversity. These biological compounds can be derived from different parts of plants such as leaves, barks, seeds, seed coats, flowers, and roots. A broad array of secondary metabolic compounds is present in the plants such as antibiotics, alkaloids, antimicrobials, food-grade pigments, and phenolics which
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Deep Learning-Based Magnetic Resonance-Ultrashort Time of Echo Imaging for Analyzing Degeneration of Intervertebral Disc Cartilage Endplate and Rehabilitation Nursing Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2022-07-13 Sainan Jiang, Xiaoyun Song, Chengming Jiang
This study was focused on the magnetic resonance-ultrashort time of echo (MR-UTE) imaging technology based on the convolution residual network (CRN) algorithm to evaluate the degeneration of intervertebral disc endplate (DIDCE) and the efficacy of rehabilitation nursing intervention. In this study, 90 patients with intervertebral disc degeneration in the hospital were randomly divided into an intervention
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Effect of Nursing Intervention on Self-Management and Quality of Life in Patients with Chronic Kidney Disease Evaluated by Renal Diffusion Tensor Imaging Features Using Image Registration Algorithm Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2022-07-14 Zongqiong Zhou
The aim of this research was to explore the effect of nursing intervention on self-management and quality of life in patients with chronic kidney disease (CKD) by using the renal diffusion tensor imaging (DTI) feature of image registration algorithm. A total of 100 patients with CKD were randomly divided into experimental group (nursing maintenance guidance intervention) and control group (routine
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MRI Semi-Quantitative Evaluation of Clinical Features of Cartilage Injury in Patients with Osteoarthritis Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2022-07-08 Xianchao Zhou, Xiang Shen
This study aimed to investigate the correlation between magnetic resonance imaging (MRI) findings of articular cartilage and clinical symptoms in patients with osteoarthritis (OA). Eighty patients with OA were selected as the study subjects (OA group) and 80 healthy subjects during the same period were also selected as the control group. All subjects underwent knee sagittal PDW-SPAIR, sagittal T1WI-aTSE
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Awakening Effect of Transcranial Magnetic Stimulation with Multimodal Magnetic Resonance Imaging under Three-Dimensional Reconstruction Algorithm Combined with Wake-Up Nursing on Patients with Massive Cerebral Infarction Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2022-07-06 Bocan Chen, Li Li, Xiaoxia Ji
This study was aimed to provide arousal treatment for disturbance of consciousness in patients with massive cerebral infarction, using multimodal magnetic resonance imaging (MRI)-assisted transcranial magnetic stimulation (TMS) under three-dimensional reconstruction algorithm combined with wake-up nursing. The application effect was also evaluated. 80 patients with massive cerebral infarction were
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The Clebsch–Gordan Coefficients and Their Application to Magnetic Resonance Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2022-05-17 Edward P. Saliba, Alexander B. Barnes
The Clebsch–Gordan coefficients are extremely useful in magnetic resonance theory, yet have an infamous perceived level of complexity by many students. The Clebsch–Gordan coefficients are used to determine both the matrix elements of the spherical tensor operators and the total angular momentum states of a system of component angular momenta. Full derivations of these coefficients are rarely worked
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Multispin Cross-Correlated Transverse Dipolar NMR Relaxation in Solution Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2022-04-12 Erik R. P. Zuiderweg
In this paper, we want to consider what would be involved in calculating the R2 relaxation of amide protons in a protein caused by dipolar interactions with nearby protons, for which there are many. NMR textbooks give analytical equations and sometimes derivations for solution NMR relaxation due to dipolar interactions between two spins. There are also closed equations for dipolar interactions between
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Groundwater Potential Assessment Using Vertical Electrical Sounding and Magnetic Methods: A Case of Adilo Catchment, South Nations, Nationalities and Peoples Regional Government, Ethiopia Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2021-12-08 Mulugeta Markos, Abel Saka, Leta Tesfaye Jule, N. Nagaprasad, Krishnaraj Ramaswamy
Vertical electrical sounding and magnetic methods were carried out to assess groundwater potential in Adilo catchment, Kembata Tembaro Zone, South Nations, Nationalities and Peoples Regional Government, Main Ethiopian Rift. The data were acquired from eight VES points using Schlumberger electrode arrays with maximum half current electrode spacing () and 253 magnetic data points were analyzed. The qualitative
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What Are the Relative Intensities of the Components of NMR Spectral Multiplets from Quadrupolar Nuclei in Uniformly Anisotropic Media? Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2021-02-19 Stuart J. Elliott, Philip W. Kuchel
Stretched hydrogels make uniformly anisotropic environments for quadrupolar nuclei such as 2H, 23Na, and 133Cs. Such surroundings cause the partial alignment of nuclear spin bearing ions and molecules that is sufficiently pronounced to alter the nuclear magnetic resonance spectra of the guest species. In most cases, resonance splittings are directly related to the spin quantum number I. The relative
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A Statistical Robust Approach to Design Parallel Transmit Radiofrequency Excitations in MRI Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2020-09-18 Vincent Gras, Franck Mauconduit, Nicolas Boulant
In MRI, at ultrahigh field, the use of parallel transmit radiofrequency (RF) arrays is very beneficial to better control spin excitation spatially. In that framework, the so-called “universal pulse” technique, proposed recently for head imaging at 7 tesla, gives access to “plug-and-play” nonadiabatic solutions exhibiting good robustness against intersubject variations in the resonant transmit fields
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Solution of the Bloch Equations including Relaxation Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2020-09-02 Eric R. Johnston
The magnetization differential equations of Bloch are integrated using a matrix diagonalization method. The solution describes several limiting cases and leads to compact expressions of wide validity for a spin ensemble initially at equilibrium.
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Lineshape of Magnetic Resonance and its Effects on Free Induction Decay and Steady-State Free Precession Signal Formation Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2020-01-19 C. H. Ziener, M. Uhrig, T. Kampf, V. J. F. Sturm, F. T. Kurz, S. Heiland, M. Bendszus, M. Pham, P. M. Jakob, H.-P. Schlemmer, L. R. Buschle
Magnetic resonance imaging based on steady-state free precision (SSFP) sequences is a fast method to acquire , , and -weighted images. In inhomogeneous tissues such as lung tissue or blood vessel networks, however, microscopic field inhomogeneities cause a nonexponential free induction decay and a non-Lorentzian lineshape. In this work, the SSFP signal is analyzed for different prominent tissue models
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Brain and Hepatic Glucose Utilization in Malarial Infection Does Not Depend on Cerebral Symptoms of the Disease Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2019-12-19 Soumita Ghosh, Arjun Sengupta, Shobhona Sharma, Haripalsingh M. Sonawat
Cerebral malaria causes several deaths every year. Global metabolic alteration, specifically hypoglycemia and lactic acidosis are hallmarks of severe malaria. Glucose being the major fuel source for the brain, it is important to understand cerebral glucose utilization in the host during cerebral complications of the disease that may have a significant role in cerebral pathogenesis. We have used 13C
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Magic Angle Spinning and Truncated Field Concept in NMR Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2019-12-04 J. Jenczyk
In order to thoroughly comprehend and adequtely interpret NMR data, it is necessary to perceive the complex structure of spin Hamiltonian. Although NMR principles have been extensively discussed in a number of distinguished introductory publications, it still remains difficult to find illustrative graphical models revealing the tensorial nature of spin interaction. Exposure of the structure standing
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Covariance nuclear magnetic resonance methods for obtaining protein assignments and novel correlations. Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2018-09-16 Aswani K Kancherla,Dominique P Frueh
Protein NMR resonance assignment can be a tedious and error prone process, and it is often a limiting factor in biomolecular NMR studies. Challenges are exacerbated in larger proteins, disordered proteins, and often alpha-helical proteins, owing to an increase in spectral complexity and frequency degeneracies. Here, several multi-dimensional spectra must be inspected and compared in an iterative manner
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Continuous wave electron paramagnetic resonance of nitroxide biradicals in fluid solution. Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2018-03-01 Sandra S Eaton,Lukas B Woodcock,Gareth R Eaton
Nitroxide biradicals have been prepared with electron-electron spin-spin exchange interaction, J, ranging from weak to very strong. EPR spectra of these biradicals in fluid solution depend on the ratio of J to the nitrogen hyperfine coupling, AN, and the rates of interconversion between conformations with different values of J. For relatively rigid biradicals EPR spectra can be simulated as the superposition
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Guide to Simulating Complex NMR Probe Circuits. Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2018-03-01 F David Doty
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Effects of radiation damping for biomolecular NMR experiments in solution: a hemisphere concept for water suppression. Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2016-08-16 Rieko Ishima
Abundant solvent nuclear spins, such as water protons in aqueous solution, cause radiation damping in NMR experiments. It is important to know how the effect of radiation damping appears in high-resolution protein NMR because macromolecular studies always require very high magnetic field strengths with a highly sensitive NMR probe that can easily cause radiation damping. Here, we show the behavior
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Characterizing magnetic resonance signal decay due to Gaussian diffusion: the path integral approach and a convenient computational method. Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2016-05-18 Evren Özarslan,Carl-Fredrik Westin,Thomas H Mareci
The influence of Gaussian diffusion on the magnetic resonance signal is determined by the apparent diffusion coefficient (ADC) and tensor (ADT) of the diffusing fluid as well as the gradient waveform applied to sensitize the signal to diffusion. Estimations of ADC and ADT from diffusion-weighted acquisitions necessitate computations of, respectively, the b-value and b-matrix associated with the employed
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Bloch Equations for Proton Exchange Reactions in an Aqueous Solution. Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2016-05-01 Jae-Seung Lee,Ravinder R Regatte,Alexej Jerschow
The extension of the Bloch equations for acid-base reactions in an aqueous solution is revisited. The acid-base reactions are second-order, and several reactions catalyzed by distinct catalysts may happen simultaneously. By constructing pseudo first-order reactions and assuming fast dissemination of protons from catalysts to solvent water, this extension converges to the well-known Bloch-McConnell
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Manifestations of classical physics in the quantum evolution of correlated spin states in pulsed NMR experiments. Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2016-05-01 Martin Ligare
Multiple-pulse NMR experiments are a powerful tool for the investigation of molecules with coupled nuclear spins. The product operator formalism provides a way to understand the quantum evolution of an ensemble of weakly coupled spins in such experiments using some of the more intuitive concepts of classical physics and semi-classical vector representations. In this paper I present a new way in which
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Quantitative Susceptibility Mapping of Magnetic Quadrupole Moments Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2019-08-06 Junghun Cho, Dong Zhou, Youngwook Kee, Pascal Spincemaille, Yi Wang
We modeled the magnetic field up to the quadrupole term to investigate not only the average susceptibility (dipole), but also the susceptibility distribution (quadrupole) contribution. Expanding the magnetic field up to the order provides the quadrupole (: monopole, : dipole). Numerical simulations were performed to investigate the quadrupole contribution with subvoxel nonuniformity. Conventional dipole
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Evaluation of the Impact of Magnetic Resonance Imaging (MRI) on Gross Tumor Volume (GTV) Definition for Radiation Treatment Planning (RTP) of Inoperable High Grade Gliomas (HGGs) Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2019-08-01 Omer Sager, Ferrat Dincoglan, Selcuk Demiral, Hakan Gamsiz, Bora Uysal, Fatih Ozcan, Onurhan Colak, Bahar Dirican, Murat Beyzadeoglu
Aim and Background. Inoperable high-grade gliomas (HGGs) comprise a specific group of brain tumors portending a very poor prognosis. In the absence of surgical management, radiation therapy (RT) offers the primary local treatment modality for inoperable HGGs. Optimal target definition for radiation treatment planning (RTP) of HGGs is a difficult task given the diffusely infiltrative nature of the disease
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Dual-Echo Arterial Spin Labeling for Brain Perfusion Quantification and Functional Analysis Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2019-08-01 André Monteiro Paschoal, Fernando Fernandes Paiva, Renata Ferranti Leoni
Arterial Spin Labeling (ASL) is a noninvasive MRI-based method to measure cerebral blood flow (CBF). Recently, the study of ASL as a functional tool has emerged once CBF fluctuation comes from capillaries in brain tissue, giving a more spatially specific response when compared to the standard functional MRI method, based on the blood oxygenation level-dependent (BOLD) contrast. Although the BOLD effect
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Full-Range Liver Fat Fraction Estimation in Magnitude MRI Using a Signal Shape Descriptor Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2019-07-09 Yuri A. Costa, Carlos P. Filho, Gabriela A. Flores, Evandro L. L. Rodrigues, Fernando F. Paiva
Current methods for estimation of proton density fat fraction (PDFF) of the liver using magnitude magnetic resonance (MR) imaging face the challenge of correctly estimating it when fat is the dominant molecule; i.e., PDFF is more than 50%. Therefore, the accuracy of the methods is limited to half-range operation. We introduce a method based on neural networks for regression capable of estimating over
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Assumption-Free Assessment of Corpus Callosum Shape: Benchmarking and Application Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2019-07-01 Erin I. Walsh, Marnie E. Shaw, Daniela A. Espinoza Oyarce, Mark Fraser, Nicolas Cherbuin
Shape analysis provides a unique insight into biological processes. This paper evaluates the properties, performance, and utility of elliptical Fourier (eFourier) analysis to operationalise global shape, focussing on the human corpus callosum. 8000 simulated corpus callosum contours were generated, systematically varying in terms of global shape (midbody arch, splenium size), local complexity (surface
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Do Patients with Implants Experience Strong Sensations That Lead to Early Termination of MRI Examinations? Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2019-07-01 J. Steinbacher, M. R. McCoy, F. Klausner, W. Wallner, A. Oellerer, L. Machegger
Purpose. Many patients with metallic implants are aware of the potential dangers in an MRI environment. Some implants cause sensations perceptible by the patient during an MRI scan. We wanted to find out if patients having an implant abort MRI scans more often than patients without implants. Furthermore, we wanted to know if the number of implants of a patient has an influence on the number of aborted
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Is Subcutaneous Route an Alternative to Intravenous Route for Mouse Contrast-Enhanced Magnetic Resonance Imaging at 1.5 T? Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2019-06-13 Jean-Philippe Dillenseger, Christian Goetz, Amira Sayeh, Pierre-Emmanuel Zorn, Stéphane Kremer, Yves Rémond, André Constantinesco, Gaëlle Aubertin-Kirch, Philippe Choquet
The present work compares intravenous (IV) and subcutaneous (SC) routes for contrast-enhanced MRI (CE-MRI) in mice. For that purpose, we selected two contrast media used in clinical practice. MRI acquisitions were performed at 1.5 T on five adult mice (Swiss, 41 g +/- 3 g). On each animal, four acquisitions were achieved with IV and SC administration of either Gd-DOTA or MS-325 (1 acquisition per week)
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Quick Reduction of Specific Absorption Rate Constraints in Parallel RF Excitation Pulse Design by Maximum Volume Inscribed Ellipsoids Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2019-06-03 Kurt Majewski
In medical magnetic resonance imaging, parallel radio frequency excitation pulses have to respect a large number of specific absorption rate constraints. Geometrically, each of these constraints can be interpreted as a complex, centered ellipsoid. We propose to replace a collection of such constraints by the single constraint which corresponds to the associated maximum volume inscribed ellipsoid and
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The Value of Intravoxel Incoherent Motion (IVIM) Magnetic Resonance Imaging in the Evaluation of the Osteosarcoma Response to Preoperative Neoadjuvant Chemotherapy in Teens Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2019-05-09 Houdong Zuo
Purpose. To investigate the value of intravoxel incoherent motion (IVIM) magnetic resonance imaging in the evaluation of the osteosarcoma (OS) response to preoperative neoadjuvant chemotherapy (NAC) in teens. Methods. Eighteen consecutive osteosarcoma patients (12 males and 6 females) diagnosed by histopathology were enrolled. All enrolled patients received NAC and underwent MRI examinations before
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A summary of the career of Daniel D. Traficante Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2018-03-01 David Rovnyak
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The past, present, and future of 1.26 T 2 Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2018-03-01 David Rovnyak
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Aging of polymeric materials by stray‐field NMR relaxometry with the NMR ‐ MOUSE Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2018-03-01 Bernhard Blümich
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Aspects of NMR reciprocity and applications in highly conductive media Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2018-03-01 Andrew J. Ilott,Alexej Jerschow
In the context of NMR spectroscopy and MRI, the principle of reciprocity provides a convenient method for determining the reception sensitivity from the transmitted rf field pattern. The reciprocity principle for NMR was originally described by Hoult et al. [J. Magn. Reson. (1976),24, 71], and can be seen as being based on the broader Lorentz reciprocity principle, and similar theorems from antenna
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Magnetic resonance data modeling: The Bayesian analysis toolbox Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2018-03-01 James D. Quirk,G. Larry Bretthorst,Joel R. Garbow,Joseph J. H. Ackerman
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Diffusion measurements using the second echo Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2018-03-01 Hilary T. Fabich,Partha Nandi,Hans Thomann,Mark S. Conradi
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A complete derivation of the Kärger equations for analyzing NMR diffusion measurements of exchanging systems Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2018-03-01 Dj Wijesekera,Timothy Stait‐Gardner,Abhishek Gupta,Johnny Chen,Gang Zheng,Allan M. Torres,William S. Price
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Foodomics and storage monitoring of three meat cuts by 1 H NMR Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2018-03-01 José Eraldo do Nascimento Fontes,Magdevis Yanet Rodriguez‐Caturla,Anderson S. Sant'Ana,Thiago Inácio Barros Lopes,Anita Jocelyne Marsaioli
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Sensitivity estimation in circular and square loops Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2018-03-01 Giulio Giovannetti
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Anomalous proton spin‐lattice relaxation in organic compounds containing methyl groups Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2018-01-01 Lidia Latanowicz,Anna Timoszyk,Jacek Kozioł
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Calculation of Larmor precession frequency in magnetically heterogeneous media Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2018-01-01 Alexander Ruh,Valerij G. Kiselev
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3D printed NMR spectra: From 1D and 2D acquisition to 3D visualization Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2018-01-01 Michael Bakker,Ben Boyd,Gary A. Meints
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Optimization of a parallel‐plate RF probe for high resolution thin film imaging Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2018-01-01 Andrés Ramírez Aguilera,Bryce MacMillan,Gillian R. Goward,Bruce J. Balcom
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Simple eddy current compensation by additional gradient pulses Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2018-01-01 Benjamin Niederländer,Peter Blümler
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Conservation of energy, density of states, and spin lattice relaxation Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2017-05-01 Navin Khaneja
The starting point of all NMR experiments is a spin polarization which develops when we place the sample in static magnetic field $B_0$. There are excess of spins aligned along $B_0$ (spin up with lower energy) than spins aligned opposite (spin down with higher energy) to the field $B_0$. A natural question is what is the source of this excess spin polarization because relaxation mechanisms can flip
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Illustration of inversion-recovery and Carr-Purcell-Meiboom-Gill sequences by the determination of ethanol content in alcoholic beverages Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2017-05-01 Yves Gossuin,Quoc L. Vuong,Leonid Grunin,Laurence Van Nedervelde,Anne Pietercelie
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Compressed sensing: Reconstruction of non-uniformly sampled multidimensional NMR data Concepts Magn. Reson. Part A Bridg. Educ. Res. (IF 0.4) Pub Date : 2017-03-01 Mark Bostock,Daniel Nietlispach