Methods the image data from 160 patients with the acetabulum fracture, including X ray plain film and spiral ct scanning, were analyzed retrospectively.

方法回顾性分析经x线平片、螺旋CT扫描证实的髋臼骨折患者160例影像资料。

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Now the existing direct volume CT methods face two difficulties:first, how to get the projection data to reconstruct the 3D image exactly, including whether the scanning structure is practical;

目前直接体积CT主要存在两大困难：一是如何获得三维图像精确重建所需的投影数据，包括扫描方式的可实现性；

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Results There are two kinds of factors which affects the DSCT image quality. One is related to scanning, including scanning parameter, swath range, use of contrast medium, etc.

结果影响DSCT图像质量的原因分为两类，一类与扫描有关，扫描参数、扫描范围、造影剂的使用等；

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Efforts are under way in the U.S. to curb overuse of CT scanning in children, including the Image Gently initiative, launched in August 2009 and spearheaded by a coalition of health-care organizations dedicated to changing medical practice.

WSJ: Childhood CT Scans Pose Cancer Risk