Investigation of effect of reconstruction filters on cone-beam computed tomography image quality

被引:0
作者
Kavitha Srinivasan
Mohammad Mohammadi
Justin Shepherd
机构
[1] University of Adelaide,School of Chemistry & Physics
[2] Royal Adelaide Hospital,Department of Medical Physics
来源
Australasian Physical & Engineering Sciences in Medicine | 2014年 / 37卷
关键词
Cone-beam CT; Image quality; OBI; Reconstruction filters; Sinograms;
D O I
暂无
中图分类号
学科分类号
摘要
Cone-beam CT (CBCT) using kV imagers integrated with linear accelerators is now widely used in verifying patient position during radiation therapy. Current CBCT acquisition protocols have lowered tube current to keep the imaging dose to a minimum. This affects the usability of CBCT data sets in treatment planning by reducing the soft tissue contrast and accuracy of CT numbers (Hounsfield values). The purpose of this study is to investigate the effect of reconstruction filters on full-fan and half-fan acquisition modes of CBCT and assess the image quality parameters of contrast- to -noise ratio, spatial resolution, pixel stability and uniformity. The results of this study show the relation between the noise and resolution of a CBCT image by using different reconstruction filters and provide possible estimations of the impact of filters on image quality and subsequent optimization for image-guided radiotherapy purposes.
引用
收藏
页码:607 / 614
页数:7
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