胸部计算机断层扫描检查中体重和尺寸比剂量估计的相关性

IF 0.6 Q4 NUCLEAR SCIENCE & TECHNOLOGY
A. L. Wati, C. Anam, A. Nitasari, S. Syarifudin, G. Dougherty
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引用次数: 4

摘要

患者在CT检查中接受的剂量以尺寸特异性剂量估计值(SSDE)表示,该剂量估计值是患者直径、x射线衰减和扫描仪输出(体积计算机断层扫描剂量指数,CTDIvol)的函数。患者直径和x射线衰减表示为水当量直径(Dw)。我们进行了这项研究,以分析胸部造影检查中体重与Dw、CTDIvol和大小特异性剂量估计值(SSDE)之间的关系。我们使用了100名患者(50名女性和50名男性患者)的图像,这些患者的体重范围为2.8 kg至80 kg。使用IndoseCT软件根据轴向CT图像自动计算Dw、CTDIvol和SSDE的值。统计分析表明,患者的体重与Dw呈线性相关。体重和Dw的线性系数(R2)值分别为0.43(女性)和0.55(男性)。然而,就CTDIvol和SSDE而言,体重与患者剂量无关。这是因为CT系统使用了管电流调制(TCM),它会根据患者的大小自动调整管电流,从而产生相对恒定的剂量,而与患者的大小无关(Dw)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Correlations Between Body Weight and Size-Specific Dose Estimate on Thoracic Computed Tomography Examination
The dose received by a patient on CT examination is expressed in size-specific dose estimates (SSDE) which is a function of the patient diameter, x-ray attenuation, and scanner output (volume computed tomography dose index, CTDIvol). Patient diameter and x-ray attenuation are represented as water equivalent diameter (Dw). We conducted the research to analyze the relationships between body weight and Dw, CTDIvol, and size-specific dose estimates (SSDE) in contrast-enhanced thorax examinations. We used images from 100 patients (50 women and 50 men patients) whose weight range from 2.8 kg to 80 kg. The values of Dw, CTDIvol, and SSDE were automatically calculated from axial CT images using the IndoseCT software. Statistical analysis showed that the patient's body weight correlates linearly with the Dw. The linearity coefficient (R2) values for body weight and Dw is 0.43 (women) and 0.55 (men). However, weight was independent of the patient dose in terms of CTDIvol and SSDE. This was because the CT system used tube current modulation (TCM), which automatically adapted the tube current to patient size, resulting in a relatively constant dose regardless of the patient size (Dw).
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来源期刊
Atom Indonesia
Atom Indonesia NUCLEAR SCIENCE & TECHNOLOGY-
CiteScore
1.00
自引率
0.00%
发文量
20
审稿时长
16 weeks
期刊介绍: The focus of Atom Indonesia is research and development in nuclear science and technology. The scope of this journal covers experimental and analytical research in nuclear science and technology. The topics include nuclear physics, reactor physics, radioactive waste, fuel element, radioisotopes, radiopharmacy, radiation, and neutron scattering, as well as their utilization in agriculture, industry, health, environment, energy, material science and technology, and related fields.
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