Rebinned BPF reconstruction for helical cone-beam CT with half-cover scaning

ZOU Xiao-bing; ZENG Li

doi:10.3788/OPE.20101809.2077

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Rebinned BPF reconstruction for helical cone-beam CT with half-cover scaning

Article | 更新时间：2020-08-12

- Rebinned BPF reconstruction for helical cone-beam CT with half-cover scaning
- Optics and Precision Engineering Vol. 18, Issue 9, Pages: 2077-2085(2010)
- 作者机构：
  
  1. 重庆大学光电技术及系统教育部重点实验室 ICT研究中心重庆,400044
  2. 重庆教育学院计算机科学系重庆,400067
  3. 重庆大学数理学院重庆,400044
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20101809.2077
  CLC： TP391;R814.42
- Received：11 January 2010，
  
  Revised：02 March 2010，
  
  Published Online：29 September 2010，
  
  Published：20 September 2010
- 稿件说明：
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邹晓兵, 曾理. 重排的半覆盖螺旋锥束CT的反投影滤波重建[J]. 光学精密工程, 2010,18(9): 2077-2085

ZOU Xiao-bing, ZENG Li. Rebinned BPF reconstruction for helical cone-beam CT with half-cover scaning[J]. 光学精密工程, 2010,18(9): 2077-2085
邹晓兵, 曾理. 重排的半覆盖螺旋锥束CT的反投影滤波重建[J]. 光学精密工程, 2010,18(9): 2077-2085 DOI： 10.3788/OPE.20101809.2077.

ZOU Xiao-bing, ZENG Li. Rebinned BPF reconstruction for helical cone-beam CT with half-cover scaning[J]. 光学精密工程, 2010,18(9): 2077-2085 DOI： 10.3788/OPE.20101809.2077.

摘要

由于传统的螺旋锥束CT系统采用的扫描方法使视场范围受到限制

本文深入分析了螺旋锥束CT的半覆盖扫描方式

提出了螺旋锥束半覆盖扫描的重建算法。该扫描方式只要求射线束覆盖物体横截面的一半以上

探测器的宽度和投影数据量大约是传统螺旋锥束CT的一半

从而节约了探测器的成本。结合扇形束投影的特点和二维反投影滤波(BPF)来实现这种横向截断投影的重建

研究了重排的加权BPF重建方法。该方法首先根据重建的层将半覆盖的螺旋锥束CT投影数据重排为半覆盖的扇形束CT投影

然后用加权的扇形束BPF算法进行重建。同传统视场区域横截面全覆盖的FDK算法相比

该方法即使在大螺距的情况下其重建结果也更接近于真实值

而且均方误差减少了一半

重建时间节约了3/5。

Abstract

As the conventional scan mode in helical cone-beam CT limits the field of view of the CT system

this paper analyzes the half-cover scanning of helical cone-beam CT and presents a new reconstruction method combined the Backprojected Filter(BPF) reconstruction and the cone-beam CT with half-cover scanning.This scanning method only demands more than half of cross section to be covered by X-ray beam at each view angle

and the width of the planar detector is about half of the conventional helical cone-beam CT

so that the cost of planar detector is saved.By combing the fan projection and 2D BPF

this paper researches a rebinned-weighted BPF algorithm for half-cover helical cone-beam CT

in which the projection data are firstly rebinned to half-cover fan-beam data

and then the weighted BPF are used in reconstruction. The results validate that reconstruction time with rebinned-weighted BPF algorithm has reduced to 3/5 that of the conventional helical FDK algorithm. Furthermore

the reconstructed value is more closed to the real value than that of FDK algorithm with large helical pitchs

and the MSE has reduced by half.

关键词

Keywords

references

陈平,潘晋孝,刘宾. CT图像边缘退化模型的建立及其在图像尺寸测量中的应用

. 光学精密工程, 2009,17(9):2269-2275. CHEN P, PAN J X, LIU B. Computed tomography image edge degradation model and its application to image size measurement

. Opt. Precision Eng., 2009,17(9):2269-2275. (in Chinese)

刘露, 刘宛予, 楚春雨, 等. 胸部CT图像中孤立性肺结节良恶性快速分类

. 光学精密工程, 2009,17(8):2060-2068. LIU L, LIU W Y, CHU C Y, et al. Fast classification of benign and malignant solitary pulmonary nodules in CT image

. Opt. Precision Eng., 2009,17(8):2060-2068. (in Chinese)

李开龙, 魏彪, 米德伶, 等. 基于FPGA 的工业X-CT 2代扫描运动控制卡设计

. 光学精密工程, 2005,13(增):168-172. LI K L, WEI B, MI D L, et al.. Design of the 2nd generation scanning motion control card based on FPGA for industrial X-CT

. Opt. Precision Eng., 2005,11(Supp.):168-172. (in Chinese)

KUNZE H, DENNERLEIN F. Cone beam reconstruction with displaced flat panel detector . Proceeding of the 10th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, Beijing, P.R. China:2009:138-141.

ZOU Y, PAN X C. Exact image reconstruction on PI-lines from minimum data in helical cone-beam CT

. Physics in Medicine and Biology, 2004,49:941-959.

傅健, 路宏年. 扇束X射线ICT偏置扫描方式及其重构算法

. 光学技术, 2003,19(1):115-118. FU J, LU H N. Bias scan mode for fan-beam X-ray ICT and its reconstruction algorithm

. Optical Technique, 2003,19(1):115-118. (in Chinese)

傅健, 路宏年. 工业CT半扫描成像技术

. 北京航空航天大学学报, 2005,31(9):966-969. FU J, LU H N. Half-scan mode for industrial CT

. Journal of Beijing University of Aeronautics and Astronautics, 2005,31(9):966-969. (in Chinese)

CHEN M, ZHANG H T, ZHANG P. BPF-based reconstruction algorithm for multiple rotationtranslation scan mode

. Progress in Natural Science, 2008,18:209-216.

LENG S, ZHUANG T L, BRIAN E N, et al.. Exact fan-beam image reconstruction algorithm for truncated projection data acquired from an asymmetric half-size detector

. Physics in Medicine and Biology, 2005,50:1805-1820.

WANG G. X-ray micro-CT with a displaced detector array

. Med. Phys., 2002,29(7):1634-1636.

GREGOR J, GLEASON S S, PAULUS M J. Cone beam X-ray computed tomography with an offset detector array . IEEE International Conference on Image Processing, Barcelona, 2003:803-806.

LI L, CHEN ZH Q, XING Y X, et al.. A new cone-beam X-ray CT system with a reduced size planar detector

. High Energy Physics and Nuclear Physics, 2006,30(8):812-817.

傅健, 路宏年, 龚磊. 锥束射线三维大视场工业CT成像方法研究

. 2006,32(2):209-212. FU J, LU H N, GONG L. Research on cone-beam ray three dimensional large field of view industrial CT imaging method

. Optical Technique, 2006,32(2):209-212. (in Chinese)

SCHAFER D, GRASS M. Cone-beam filtered back-projection for circular X-ray tomography with off-center detector . Proceeding of the 10th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, Beijing, P.R. China: 2009:86-89.

CHO S, XIA D, PRSTDON E, et al.. Half-fan-based region-of-interest imaging in circular cone-beam CT for radiation therapy . Proceeding of the 10th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, Beijing, P.R. China:2009:385-388.

ZOU Y, PAN X C. An extended data function and its generalized backprojection for image reconstruction in helical cone-beam CT

. Physics in Medicine and Biology, 2004,49:N383-N387.

DEFRISE M, NOO F, KUDO H. A solution to the long-object problem in helical cone-beam tomography

. Physics in Medicine and Biology, 2000,45:623-643.

NOO F, DEFRISE M, CLACKDOYLE R. Single-slice rebinning method for helical cone-beam CT

. Physics in Medicine and Biology, 1999,44:561-570.

陈炼, 吴志芳, 周立业. 一种改进的锥束螺旋CT单层重排重建算法

. CT理论与应用研究, 2008,17(1):7-13. CHEN L, WU ZH F, ZHOU L Y. An improved single-slice rebinning algorithm for helical cone-beam CT

. CT Theory and Applications, 2008,17(1):7-13.

ZOU Y, PAN X C, SIDKY E Y. Image reconstruction in region-of-interest from truncated projections in a reduced fan-beam scan

. Physics in Medicine and Biology, 2004,49:1-15.

LI L, CHEN Z Q, ZHANG L, et al.. A backprojection filtered image reconstruction algorithm for circular cone-beam CT .SPIE Medical Imaging, 2006,6142:1-8.

WANG G, LIN T H, CHEN P C, et al.. A general cone-beam reconstruction algorithm

. IEEE Transactions on Image Processing, 1993,12(3):486-496.

SUN Y, HOU Y, HU J. Reduction of artifacts induced by misaligned geometry in cone-beam CT

. IEEE Transactions on Biology Engineering, 2007,54:1461-1471.

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