A significant source of ionizing radiation for medical use is computed tomography (CT). According to estimates, more than 84 million CT scans are carried out yearly in the US. Because the neck area contains several organs and tissues that are very sensitive to ionizing radiation, such as the thyroid gland, CT for the neck region is commonly done for a variety of clinical causes. This study's goal is to assess the patient doses to radiosensitive organs and effective doses received during the CT neck surgery in the pastAt Riyadh Care Hospital, a multislice CT (MSCT) system (Siemens Somatom Sensation, 64 slices/detector) was used to perform improved CT treatments on a total of 54 patients. Patient ages were 41.5–15.5 years old on average, with a wide variation (21–73). Using computer software based on Monte Carlo simulation, organ and effective dosages were assessed. The International Commission of Radiological Protection (ICRP) risk variables were used to calculate the patient's radiogenic risk for a particular organ. The patients' dose length product (DLP, mGy.cm) for CT neck examination were 993.3 ± 539.5 (267.3–2441.7). The mean and range of volume CT dose per slice (CTDIvol (mGy)) were 1.5 ± 3.9 (3.91–22.55). The overall effective dose (mSv) per procedure is ranged from 1.3 to 11.7 with a mean value 2.8 mSv. Patients' CT neck procedures have been repeated the procedure up to 7 times during the treatment course. The risk of malignancy is 1x10^-6 CT procedure. The study showed that patients received wide discrepancies in patients' doses up to 9 times. Optimization of image acquisition protocol and scan length is necessary to reduce the unnecessary risk.

用于医疗用途的电离辐射的一个重要来源是计算机断层扫描 (CT)。据估计，美国每年进行超过 8400 万次 CT 扫描。由于颈部区域包含多个对电离辐射非常敏感的器官和组织，例如甲状腺，因此颈部区域的 CT 通常用于各种临床原因。本研究的目标是评估患者对放射敏感器官的剂量和过去在利雅得护理医院接受的 CT 颈部手术期间所接受的有效剂量。共对54名患者进行CT治疗。患者年龄平均为 41.5-15.5 岁，差异很大 (21-73)。使用基于蒙特卡罗模拟的计算机软件，评估器官和有效剂量。国际放射防护委员会 (ICRP) 风险变量用于计算患者对特定器官的放射风险。CT颈部检查的患者剂量长度乘积（DLP，mGy.cm）为993.3±539.5（267.3-2441.7）。每层体积 CT 剂量 (CTDIvol (mGy)) 的平均值和范围为 1.5 ± 3.9 (3.91–22.55)。每次手术的总有效剂量 (mSv) 范围为 1.3 至 11.7，平均值为 2.8 mSv。在治疗过程中，患者的颈部 CT 手术已经重复了多达 7 次。恶性肿瘤的风险是 1x10 CT 颈部检查的剂量长度乘积 (DLP, mGy.cm) 为 993.3 ± 539.5 (267.3–2441.7)。每层体积 CT 剂量 (CTDIvol (mGy)) 的平均值和范围为 1.5 ± 3.9 (3.91–22.55)。每次手术的总有效剂量 (mSv) 范围为 1.3 至 11.7，平均值为 2.8 mSv。在治疗过程中，患者的颈部 CT 手术已经重复了多达 7 次。恶性肿瘤的风险是 1x10 CT 颈部检查的剂量长度乘积 (DLP, mGy.cm) 为 993.3 ± 539.5 (267.3–2441.7)。每层体积 CT 剂量 (CTDIvol (mGy)) 的平均值和范围为 1.5 ± 3.9 (3.91–22.55)。每次手术的总有效剂量 (mSv) 范围为 1.3 至 11.7，平均值为 2.8 mSv。在治疗过程中，患者的颈部 CT 手术已经重复了多达 7 次。恶性肿瘤的风险是 1x10^-6 CT 程序。研究表明，患者接受的剂量差异很大，高达 9 倍。有必要优化图像采集协议和扫描长度，以减少不必要的风险。