Clinical potentials of the prototype 256-detector row CT-scanner
Clinical potentials of the prototype 256-detector row CT-scanner
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DOI：
10.1016/j.acra.2004.11.011
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发表时间：
2005-02-01
影响因子：
4.8
通讯作者：
Tanada, S
中科院分区：
文献类型：
--
作者：
Mori, S;Endo, M;Tanada, S
基本原理和目标。目的：评价健康志愿者256排CT的临床潜力。材料与方法。8名健康男性（22-63岁）参与了本研究。他们接受了头部、胸部、腹部或骨盆连续轴位扫描模式的非对比增强检查。剂量与常规多层螺旋CT检查相同。图像质量由三名委员会认证的放射科医生解释。256排CT一次旋转即可获得0.5-0.8 mm各向同性体积数据。主要有希望的发现如下。三维结构在多个平面上清晰可见，无需二次重建，而轴向图像的图像质量与常规CT基本相同。在扫描区域的边缘观察到阴影或条纹伪影。后者也被称为费尔德坎普文物。冠状胸片显示心脏跳动产生运动伪影，结论。256排CT有望在临床应用中发挥作用，因为它能够提供精细结构的三维可视化。观察到的费尔德坎普人工制品通常不会影响图像的解释。目前正在继续研究沿颅侧方向的图像校正，以提高整体图像质量。
Rationale and Objectives. To evaluate clinical potentials of the 256-detector row computed tomography (CT) in healthy volunteers.Materials and Methods. Eight healthy males (22-63 years) participated in the present study. They underwent a non-contrast-enhanced examination with a contiguous axial scan mode either for head, chest, abdomen, or pelvis. Dose was the same as routinely used for multislice CT examinations. Image quality was interpreted by three board-certitied radiologists.Results. With the 256-detector row CT, 0.5-0.8 mm isotropic volumetric data could be acquired in one rotation. Main promising findings are as follows. Three-dimensional structures were visualized clearly in the multiple planes without secondary reconstruction, whereas the axial images had nearly the same image quality as conventional CT. Shading or streak artifacts were observed at the edge of the scan region. The latter are also known as Feldkamp artifacts. Coronal chest images showed a motion artifact from the heart beating.Conclusion. The 256-detector row CT promises to be useful in clinical applications with its ability to provide three-dimensional visualization of fine structures. The Feldkamp artifacts observed did not generally affect interpretation of images. Investigations are now continuing on image correction along the craniocaudal direction to improve the overall image quality.