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首页> 外文会议>IEEE Nuclear Science Symposium >Dosimetry of Dual-energy CT for the Detection of Acute-Stage Cerebral Infarction: a Phantom Study
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Dosimetry of Dual-energy CT for the Detection of Acute-Stage Cerebral Infarction: a Phantom Study

机译：双能CT的剂量法检测急性阶段脑梗塞：幻影研究

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摘要

We established a method for image-based diagnosis of cerebral stroke by developing a phantom that could visualize cerebral stroke using X-ray CT imaging, while evaluating the imaging conditions. We recently improved the contrast of acute-stage cerebral infarction using virtual monochromatic images obtained by dual-energy CT. We measured radiation doses using the newly developed phantom while assessing its potential clinical application. In this study, the tube voltages with a thin (Sn) filter were 80 kV/Sn 140 kV, 100 kV/Sn140 kV, and 140 kV/80 kV; the tube current time products were 400, 600, and 800 mAs; and the scanning range was 120 mm from the orbitomeatal line to the parietal region. The dose was measured three times using TLD, and the absorbed dose was obtained from the average. Compared with 120 kV, the absorbed dose could be reduced by approximately 47% at 80 kV/Sn 140 kV, approximately 30% at 100 kV/Sn 140 kV, and approximately 22% at 140 kV/80 kV, when the tube current time product was 600 mAs. Our dose measurement for visualizing acute-stage cerebral infarction revealed that the dose could be reduced with dual-energy CT compared with CT at 120 kV.
机译：我们建立了一种通过开发使用X射线CT成像而可视化脑卒中的幽灵术来确定基于脑卒中的基于脑卒中的诊断方法，同时评估成像条件。我们最近使用双能量CT获得的虚拟单色图像改善了急性阶段脑梗死的对比。我们使用新开发的幻影测量辐射剂量，同时评估其潜在的临床应用。在该研究中，具有薄（Sn）过滤器的管电压为80kV / Sn 140 kV，100kV / Sn140 kV和140kV / 80 kV;管电流时间产品为400,600和800 mas;并且扫描范围距离顶部区域的斜滴线120毫米。使用TLD测​​量剂量三次，并且从平均值获得吸收的剂量。与120kV相比，吸收剂量可以在80kV / Sn 140kV下减小约47％，在100kV / Sn 140kV下约30％，当管当前时间时，约为22％，在140kV / 80kV下约22％产品为600 mas。我们的剂量测量可视化急性阶段的脑梗死显示，与120kV的CT相比，剂量可以用双能CT减少。

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