Dynamic detector offsets for field of view extension in C-arm computed tomography with application to weight-bearing imaging.
Dynamic detector offsets for field of view extension in C-arm computed tomography with application to weight-bearing imaging.
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用于 C 形臂计算机断层扫描视野扩展的动态探测器偏移及其在承重成像中的应用
DOI:
10.1118/1.4915542
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发表时间:
2015
期刊:
影响因子:
3.8
通讯作者:
A. Maier
中科院分区:
文献类型:
--
作者:
M. Herbst;F. Schebesch;M. Berger;J.-H. Choi;R. Fahrig;J. Hornegger;A. Maier
Purpose:In C‐arm computed tomography (CT), the field of view (FOV) is often not sufficient to acquire certain anatomical structures, e.g., a full hip or thorax. Proposed methods to extend the FOV use a fixed detector displacement and a 360° scan range to double the radius of the FOV. These trajectories are designed for circular FOVs. However, there are cases in which the required FOV is not circular but rather an ellipsoid.Methods:In this work, the authors show that in fan‐beam CT, the use of a dynamically adjusting detector offset can reduce the required scan range when using a noncircular FOV. Furthermore, the authors present an analytic solution to determine the minimal required scan ranges for elliptic FOVs given a certain detector size and an algorithmic approach for arbitrary FOVs.Results:The authors show that the proposed method can result in a substantial reduction of the required scan range. Initial reconstructions of data sets acquired with our new minimal trajectory yielded image quality comparable to reconstructions of data acquired using a fixed detector offset and a full 360° rotation.Conclusions:Our results show a promising reduction of the necessary scan range especially for ellipsoidal objects that extend the FOV. In noncircular FOVs, there exists a set of solutions that allow a trade‐off between detector size and scan range.
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影响因子:
3.8
作者:
Maier, Andreas;Wigstrom, Lars;Fahrig, Rebecca
通讯作者:
Fahrig, Rebecca
DOI:
--
发表时间:
2006
期刊:
Conference Record of 2005 IEEE Nuclear Science Symposium and Medical Imaging Conference
影响因子:
--
作者:
Haiquan Yang;Haiquan Yang;Haiquan Yang et al.;Haiquan Yang;Michel Defrise;Haiquan Yang;Ikuko Arai
通讯作者:
Ikuko Arai
影响因子:
3.8
作者:
Choi, Jang-Hwan;Maier, Andreas;Fahrig, Rebecca
通讯作者:
Fahrig, Rebecca
影响因子:
3.8
作者:
Liu, Baodong;Bennett, James;Yu, Hengyong
通讯作者:
Yu, Hengyong
影响因子:
5.9
作者:
Hirschmann, Anna;Pfirrmann, Christian W. A.;Buck, Florian M.
通讯作者:
Buck, Florian M.