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首页> 外文期刊>Radiation Protection Dosimetry >ORGAN DOSE EVALUATIONS BASED ON MONTE CARLO SIMULATION FOR CT EXAMINATIONS USING TUBE CURRENT MODULATION
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ORGAN DOSE EVALUATIONS BASED ON MONTE CARLO SIMULATION FOR CT EXAMINATIONS USING TUBE CURRENT MODULATION

机译：基于蒙特卡罗模拟的管电流调制基于CT的有机剂量评估

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摘要

The aims of this study were to estimate tube current values for each X-ray projection angle used in adult chest computed tomography (CT) and abdomen-pelvis CT examinations with tube current modulation (TCM) and to validate organ doses determined using Monte Carlo (MC) simulations through comparisons with the doses measured using in-phantom dosimetry. For dose simulations, dose distribution images were obtained by inputting the geometry of a CT scanner, scan parameters including estimated TCM curves and CT images of an adult anthropomorphic phantom into MC simulation software. Organ doses were then determined from the dose distribution images. For dose measurements, organ doses were evaluated using radiophotoluminescence glass dosemeters located at various organ positions within the phantom. Relative differences between the simulated and measured organ doses were -2.5 to 11.0% and -1.5 to 10.5% for organs in chest and abdomen-pelvis CT scan ranges, respectively. Thus, the simulated and measured doses agreed well.
机译：这项研究的目的是评估在成人胸部计算机断层扫描（CT）和腹部骨盆CT检查中使用管电流调制（TCM）所使用的每个X射线投影角的管电流值，并验证使用Monte Carlo（ MC）通过与使用幻像剂量法测量的剂量进行比较来模拟。对于剂量模拟，通过将CT扫描仪的几何形状，扫描参数（包括估计的TCM曲线）和成年拟人化体模的CT图像输入到MC模拟软件中来获得剂量分布图像。然后从剂量分布图像确定器官剂量。对于剂量测量，使用位于体模内各个器官位置的放射光致发光玻璃剂量计评估器官剂量。对于胸部和腹部骨盆CT扫描范围内的器官，模拟和测量的器官剂量之间的相对差异分别为-2.5至11.0％和-1.5至10.5％。因此，模拟和测量的剂量非常吻合。

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  • 来源
    《Radiation Protection Dosimetry》 |2017年第3期|387-394|共8页
  • 作者

    K. Fujii; K. Nomura; Y. Muramatsu; S. Obara; K. Akahane; M. Kusumoto;

  • 作者单位

    Department of Radiological Sciences, Nagoya University Graduate School of Medicine, 1-1-20, Daikominami, Higashi-ku, Nagoya, Japan , Department of Radiology, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Japan;

    Department of Radiology, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Japan;

    Department of Radiology, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Japan;

    Department of Radiation Measurement and Dose Assessment, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba, Japan;

    Department of Radiation Measurement and Dose Assessment, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba, Japan;

    Department of Radiology, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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