| 张晓东,郭小超,王霄英.体型特异性剂量估计的最新概念及临床应用[J].中国医学影像技术,2016,32(12):1822~1826 |
| 体型特异性剂量估计的最新概念及临床应用 |
| Latest definition and clinical application of size-specific dose estimate |
| 投稿时间：2016-06-22 修订日期：2016-10-07 |
| DOI：10.13929/j.1003-3289.2016.12.009 |
| 中文关键词: 体型特异性剂量估计 容积CT剂量指数 水当量直径 转换系数 |
| 英文关键词:Size-specific dose estimate Volume CT dose index Water equivalent diameter Conversion factors |
| 基金项目: |
|
| 摘要点击次数: 2447 |
| 全文下载次数: 1795 |
| 中文摘要: |
| CT检查时设置扫描参数的原则是在得到临床诊断可接受的图像质量的前提下，尽可能降低辐射剂量。而患者所接受的辐射剂量，不仅与CT设备的输出剂量有关，也与患者本身体型相关。现有的CT设备提供的辐射剂量信息，如容积CT剂量指数（CTDIvol），是基于固定大小聚甲基丙烯酸甲酯模型测量所得，并未考虑到患者的不同体型信息。美国医学物理师学会（AAPM）在204和220报告中提出了一种新的患者辐射剂量估算方法——体型特异性剂量估计（SSDE），综合考虑了CT辐射输出量和患者体型信息，能准确评估患者辐射剂量。本文对SSDE的最新概念和临床应用进展进行综述。 |
| 英文摘要: |
| It is important that the CT exam must use the optimal CT scan parameters to ensure radiation dose as low as possible to get acceptable image quality for clinical diagnosis. The dose received by a patient from CT scan depends on both scanner radiation output and patient size, previously described by volume CT dose index (CTDIvol). However, CTDIvol is determined for polymethyl methacrylate phantom. It provides information regarding only on scanner output, not on patient size. The American Association of Physicists in Medicine (AAPM) Report #204 and #220 addressed the effect of patient size on CT dose, and provided approaches for calculation of size-specific dose estimate (SSDE) based both on the CTDIvol and patient size. The latest advancement and clinical application of the SSDE were reviewed in this article. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
