Spiral CT: Current status and future directions

被引：7
|
作者：
Wang, G
Cheng, PC
Vannier, MW
机构：
来源：
DEVELOPMENTS IN X-RAY TOMOGRAPHY | 1997年 / 3149卷
关键词：
X-ray computed tomography (CT); X-ray micro-CT; spiral/helical scanning; fan-beam; cone-beam; iterative reconstruction;
D O I：
10.1117/12.279358
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In X-ray computed tomography (CT) spiral/helical scanning is achieved by continuous and simultaneous source rotation, object translation and data acquisition. In medical imaging, fan-beam spiral CT has replaced conventional incremental CT. Also, cone-beam spiral CT is feasible and advantageous in important applications. In this paper, resolution characteristics, protocol optimization, and image restoration ate discussed in fan-beam spiral CT. Then, generalized Feldkamp cone-beam reconstruction is described in spiral geometry. Based on Snyder's iterative deblurring theory, a unified iterative algorithm is reported to handle incomplete cone-beam data. Finally, several future possibilities in spiral CT are mentioned.
引用
收藏
页码：203 / 212
页数：10
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