电子束CT三维重建方法  

Three-Dimensional Reconstruction Methods of Electron-Beam CT

作　　者：何沙[1] 白桦[1] 戴汝平[1] 

机构地区：[1]中国医学科学院中国协和医科大学心血管病研究所阜外医院

出　　处：《CT理论与应用研究（中英文）》1998年第4期5-12,共8页Computerized Tomography Theory and Applications

摘　　要：医学断层图像的三维重建技术提供了一种无创方法直观考察人体内的立体结构，当用于电子束ＣＴ（ＥＢＣＴ），更能充分显示它的价值。本文阐述了用电子束ＣＴ采集体层数据（包括步进容积扫描、连续容积扫描、电影扫描）后，用多层面重组（包括曲面重组）、最大密度投影、表面阴影显示等方法进行三维重建的处理过程。我们比较了各种重建方法的优、缺点，说明在实际应用中应当结合多种方法，给诊断提供更可靠的信息。电子束ＣＴ最大限度地减少了运动伪影，不但提高了这些方法的三维图像质量，而且其电影扫描派生出了四维重建──三维时间序列；根据三维重建的要求提出了优化扫描参数的建议。A non invasive method to observe human anatomy is presented by three dimensional reconstruction of medical transverse images. The technique is even more valuable when using electron beam CT (EBCT). We discribed the procedure that acquiring transverse image data via EBCT (including step volume scan, continuous volume scan, and movie scan), then reconstruct three dimensional image using multi planar reformation, maximum intensity projection, and shaded surface display. By comparing the advantages and disadvantages of the three reconstructing methods, we suggest combining various methods to offer more reliable information to diagnostics. EBCT reduced moving artifacts to the least, improved the quality of three dimensional images. Moreover, the movie scan yields four dimensional reconstruction-three dimensional time sequence. According to the demand of three dimensional reconstruction, we suggest the optimal scanning parameters.

关 键 词：三维重建 电子束CT CT 医用 

分 类 号：R814.4[医药卫生—影像医学与核医学]