Multiple helical scans and the reconstruction of over FOV-sized objects in cone-beam CT

doi:10.1088/1674-1056/21/6/068701

Abstract In cone-beam computed tomography (CBCT), there are often cases where the size of the specimen is larger than the field of view (FOV) (referred to as over FOV-sized (OFS)). To acquire the complete projection data for OFS objects, some scan modes have been developed for long objects and short but over-wide objects. However, these modes still cannot meet the requirements for both longitudinally long and transversely wide objects. In this paper, we propose a multiple helical scan mode and a corresponding reconstruction algorithm for both longitudinally long and transversely wide objects. The simulation results show that our model can deal with the problem and that the results are acceptable, while the OFS object is twice as long compared with the FOV in the same latitude.

Keywords: reconstruction algorithm cone-beam computed tomography large object multiple helical scans

Received: 22 October 2011
Revised: 21 February 2012
Accepted manuscript online:

PACS:	87.59.-e	(X-ray imaging)
	07.85.-m	(X- and γ-ray instruments)

Fund: Project supported by the National Basic Research Program of China (Grant No. 2011CB707701), the National High Technology Research and Development Program of China (Grant No. 2009AA012200), and the National Nature Science Foundation of China (Grant No. 30970722).

Corresponding Authors: Yan Bin
E-mail: ybspace@yahoo.com.cn

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Han Yu(韩玉), Yan Bin(闫镔), Li Lei(李磊), Yu Chao-Qun(宇超群), Li Jian-Xin(李建新), and Bao Shang-Lian(包尚联) Multiple helical scans and the reconstruction of over FOV-sized objects in cone-beam CT 2012 Chin. Phys. B 21 068701

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Multiple helical scans and the reconstruction of over FOV-sized objects in cone-beam CT

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