Quasi-exact helical cone beam reconstruction for micro CT

被引:0
|
作者
Hu, JC [1 ]
Johnson, R [1 ]
Molthen, R [1 ]
Haworth, S [1 ]
Dawson, C [1 ]
机构
[1] Marquette Univ, Dept Biomed Engn, Milwaukee, WI 53233 USA
关键词
D O I
暂无
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
A cone beam micro-CT system (Fig. 1) is set up to collect truncated helical cone beam data. This system includes a micro-focal x-ray source, a precision computer-controlled X-Y-Z-theta stage, and an image-intensifier coupled to a large format CCD detector. The helical scanning mode is implemented by rotating and translating the stage while keeping X-ray source and detector stationary. A chunk of bone and a mouse leg are scanned and quasi-exact reconstruction is performed using the approach proposed in [1]. This approach introduced the original idea of accessory paths with upper and lower virtual detectors having infinite axial extent. It has a filtered backprojection structure which is desirable in practice and possesses the advantages of being simple to implement and computationally efficient compared to other quasi-exact helical cone beam algorithms for the long object problem [6-8].
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收藏
页码:681 / 684
页数:4
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