中华放射医学与防护杂志

苑翠红,高林峰,曲良勇,等.基于DICOM文件信息估算多排螺旋CT剂量方法的探讨[J].中华放射医学与防护杂志,2016,36(2):143-148.Yuan Cuihong,Gao Linfeng,Qu Liangyong,et al.Discussions of Multi-Detector Computed Tomography (MDCT) dose assessment based on information in DICOM images[J].Chin J Radiol Med Prot,2016,36(2):143-148

基于DICOM文件信息估算多排螺旋CT剂量方法的探讨

Discussions of Multi-Detector Computed Tomography (MDCT) dose assessment based on information in DICOM images

投稿时间：2015-03-07

DOI：10.3760/cma.j.issn.0254-5098.2016.02.013

中文关键词: DICOM 多排螺旋CT 剂量估算

英文关键词:DICOM Multi-detector computed tomography (MDCT) Dose assessment

基金项目:国家自然科学基金(11175122)

作者	单位	E-mail
苑翠红	200941 上海中冶医院放射科
高林峰	200336 上海市疾病预防控制中心放射卫生科	gaolinfeng@scdc.sh.cn
曲良勇	200941 上海中冶医院放射科
钮建武	200941 上海中冶医院放射科
张华明	200941 上海中冶医院放射科

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中文摘要:

目的建立基于DICOM文件信息估算X射线CT剂量的方法,并验证该方法的可靠性。方法以临床常用多排螺旋CT为研究对象,采用java语言开发DICOM图像文件信息读取软件,实现自动化批量读取在不同扫描模式下胸部、腹部X射线CT螺旋扫描的每幅图像中的剂量相关信息,结合准直、mAs、螺距等扫描参数,计算每次扫描检查的容积CT剂量指数(CTDI_vol)和DLP,并与X射线CT的显示值进行比较。结果对于胸部螺旋扫描,基于DICOM图像文件信息计算得到的CTDI_vol与显示值误差为-2%~8%,DLP与显示值误差为-2%~5%;对于腹部螺旋扫描,CTDI_vol计算值与显示值误差在0~2%,DLP与显示值误差在1%~3%。计算得到的CTDI_vol与显示值误差为-2%~2%,DLP与显示值误差为-2%~3%。结论本研究所建立的基于DICOM文件信息估算多排螺旋CT剂量的方法值得推广和应用。

英文摘要:

Objective To establish an accuracy test method for MDCT dose assessment based on information in DICOM images. Methods The type of MDCT studied in this paper was widely used in clinical practice. A software package developed by java language was used to automatically read dose-related information from DICOM files of MDCT. The CTDI_vol and DLP of each pectoral or abdominal scan was calculated based on these information and the basic scan parameters such as collimation, mAs and pitch. The calculated values were compared with the displayed values. Results For pectoral scans, the difference between the calculated and displayed values was between -2%-8% for CTDI_vol, and -2%-5% for DLP. For abdominal scan, the difference between the calculated and displayed values was 0-2% for CTDI_vol, and -2%-3% for DLP. Conclusions This method is useful for MDCT dose assessment and is worth disseminating its application for general use.

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