Rogalla P, Bender A, Bick U, Huitema A, Terwisscha van Scheltinga J, Hamm B
Charité Hospital, Humboldt-Universität zu Berlin, Germany.
Eur Radiol. 2000;10(5):806-10. doi: 10.1007/s003300051008.
Tissue transition projection (TTP) represents a three-dimensional reconstruction technique for volumetric image data sets. To demonstrate the principle characteristics of TTP, a simple phantom consisting of two pipes with a simulated, wall-adherent polyp was scanned with spiral CT, and images were reconstructed by means of volume rendering for both opaque surface reconstructions and TTP. Tissue transition projection was used in 7 patients for reconstruction of the small intestine or the colon. Unlike three-dimensional reconstructions with opaque surfaces, TTP enhances surface transitions while suppressing homogeneous areas, allowing delineation of the bowel wall similar to conventional double-contrast studies.
组织过渡投影（TTP）是一种用于体图像数据集的三维重建技术。为了展示TTP的主要特征，使用螺旋CT对一个由两根带有模拟壁附着息肉的管道组成的简单模型进行扫描，并通过体绘制对不透明表面重建和TTP进行图像重建。7例患者使用组织过渡投影对小肠或结肠进行重建。与不透明表面的三维重建不同，TTP增强了表面过渡，同时抑制了均匀区域，从而能够像传统双对比研究一样描绘肠壁。
