| AEC模式下CTDI剂量指数指导意义初探 |
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| 引用本文： | 刘彬,费晓璐,魏岚,白玫.AEC模式下CTDI剂量指数指导意义初探[J].医疗设备信息,2008,23(10):116-117. |
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| 作者姓名： | 刘彬 费晓璐 魏岚 白玫 |
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| 作者单位： | 首都医科大学宣武医院医学工程科 |
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| 摘 要： | CT生产厂商推出了自动曝光控制AEC技术,根据受检者的体态调节管电流,达到减小辐射剂量的目的。在扫描过程中采用AEC技术,系统会给出一个剂量指数CTDI_(vol),但对于整个扫描过程,实际的CTDI_(vol)是随着管电流的改变而不断改变的。因此,厂商提供的CTDI_(vol)到底有什么指导意义,本文将以临床实验和计算机软件模拟相结合的方法,探讨系统剂量指数的指导意义。
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| 关 键 词： | CT成像 AEC技术 剂量指数 辐射剂量 CTDI |
Assessment on Guiding Significance of CT Dose Index During Automatic Exposure Control Systems on CT Scanners |
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| LIU Bin FEI Xiao-lu WEI Lan BAI Mei.Assessment on Guiding Significance of CT Dose Index During Automatic Exposure Control Systems on CT Scanners[J].Information of Medical Equipment,2008,23(10):116-117. |
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| Authors: | LIU Bin FEI Xiao-lu WEI Lan BAI Mei |
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| Abstract: | All major CT manufacturers propose automatic exposure control (AEC) devices to decrease patients' dose during examination. CT equipment can provide a dose index called CTDI_(vol) to indicate the dose delivered to patients.However,during AEC modulation CTDI_(vol) changes according to different tube current.So what does CTDI_(vol) mean? In this study,we discuss the guiding significance of CTDI_(vol) during AEC modulation by the combination of clinical experiments and computer simulation. |
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| Keywords: | CT imaging AEC dose index radiation dose CTDI |
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