Methods to Mitigate Data Truncation Artifacts in Multi-Contrast Tomosynthesis Image Reconstructions

被引:0
|
作者
Garrett, John [1 ]
Ge, Yongshuai [1 ]
Li, Ke [1 ,2 ]
Chen, Guang-Hong [1 ,2 ]
机构
[1] Univ Wisconsin, Dept Med Phys, Madison, WI 53705 USA
[2] Univ Wisconsin, Dept Radiol, Madison, WI 53792 USA
来源
MEDICAL IMAGING 2015: PHYSICS OF MEDICAL IMAGING | 2015年 / 9412卷
关键词
D O I
10.1117/12.2081017
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Differential phase contrast imaging is a promising new image modality that utilizes the refraction rather than the absorption of x-rays to image an object. A Talbot-Lau interferometer may be used to permit differential phase contrast imaging with a conventional medical x-ray source and detector. However, the current size of the gratings fabricated for these interferometers are often relatively small. As a result, data truncation image artifacts are often observed in a tomographic acquisition and reconstruction. When data are truncated in x-ray absorption imaging, the methods have been introduced to mitigate the truncation artifacts. However, the same strategy to mitigate absorption truncation artifacts may not be appropriate for differential phase contrast or dark field tomographic imaging. In this work, several new methods to mitigate data truncation artifacts in a multi-contrast imaging system have been proposed and evaluated for tomosynthesis data acquisitions. The proposed methods were validated using experimental data acquired for a bovine udder as well as several cadaver breast specimens using a benchtop system at our facility.
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页数:7
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