Ogura Y, Katada K, Anno H, Tsujioka K, Ida Y, Takeshita G, Koga S, Nomura T
Department of Radiology and Ophthalmology, Fujita Health University, School of Hygiene.
Nihon Igaku Hoshasen Gakkai Zasshi. 1993 Feb 25;53(2):180-7.
Helical scanning CT (HES-CT) was applied to multiplanar reconstruction (MPR) and 3-D imaging for the diagnosis of 65 patients with orbital lesions. We employed the the Toshiba TCT-900S, a fourth-generation high-speed CT scanner equipped with a slip-ring system. In HES-CT, scanning was performed with continuous rotation of the X-ray tube for 30 s, while the couch top was simultaneously moved at a constant speed of 1 to 2 mm/s. Images were reconstructed from continuous raw data to obtain a slice pitch of 1 mm in the longitudinal direction. HES-CT was found to have some advantages over conventional thin slice CT: 1) a wide area could be scanned in a short time (30 s) without motion artifact, 2) small lesions could be easily detected because slice images could be generated with a fine pitch at arbitrary positions from continuous raw data, 3) MPR images had good continuity in the longitudinal direction, and 4) high contrast of structures was obtained in the orbital region. HES-CT was considered to be useful for the detection of orbital lesions.
采用螺旋扫描CT（HES-CT）对65例眼眶病变患者进行多平面重建（MPR）及三维成像诊断。我们使用的是配备滑环系统的第四代高速CT扫描仪东芝TCT-900S。在HES-CT扫描中，X射线管连续旋转30秒进行扫描，同时检查床以1至2毫米/秒的恒定速度同步移动。从连续的原始数据重建图像，以在纵向获得1毫米的层厚。结果发现HES-CT相较于传统薄层CT具有一些优势：1）可在短时间（30秒）内扫描大面积区域且无运动伪影；2）由于可以从连续原始数据在任意位置以精细层厚生成切片图像，小病变易于检测；3）MPR图像在纵向具有良好的连续性；4）眼眶区域结构对比度高。HES-CT被认为对眼眶病变的检测有用。
