Lemke A J, Hosten N, Neumann K, Wollensak J, Felix R
Strahlenklinik und Poliklinik, Universitätsklinikum Rudolf Virchow.
Rofo. 1994 Nov;161(5):391-8. doi: 10.1055/s-2008-1032555.
In a prospective study the value of spiral CT for the detection and differential diagnosis of intraorbital masses was investigated. Thirty patients with various orbital diseases were examined with transverse spiral computed tomography. After performing two contiguous 1 mm spiral CT scans, coronal, parasagittal, and other reconstructions were obtained. Compared with separately generated 2 mm slices, the 1 mm spiral CT images showed a slightly decreased signal-to-noise ratio, but due to the better spatial resolution, the image quality of secondary reconstructions was similar to that of the original transverse spiral CT slices. Generally the orbital masses were visualized best in the coronal reconstruction. In certain cases, the parasagittal reconstructions were superior. Reconstructions in freely definable slice planes based on 1 mm spirals provides better visualization of orbital diseases without increasing radiation dose. This method allows multiplanar reconstructions similar to magnetic resonance tomography.
在一项前瞻性研究中，对螺旋CT在眼眶内肿块检测及鉴别诊断中的价值进行了研究。对30例患有各种眼眶疾病的患者进行了横断位螺旋计算机断层扫描。在进行了连续两层1毫米的螺旋CT扫描后，获得了冠状位、矢状旁位及其他重建图像。与单独生成的2毫米层厚图像相比，1毫米螺旋CT图像的信噪比略有下降，但由于空间分辨率更高，二次重建的图像质量与原始横断位螺旋CT图像相似。一般来说，眼眶肿块在冠状位重建图像中显示最佳。在某些情况下，矢状旁位重建图像更具优势。基于1毫米螺旋扫描在可自由定义的层面进行重建，可在不增加辐射剂量的情况下更好地显示眼眶疾病。该方法可进行类似于磁共振断层扫描的多平面重建。
