A patient-specific scatter artifacts correction method

被引：3

作者：

Zhao, Wei ^{[1
]}

Brunner, Stephen ^{[1
]}

Niu, Kai ^{[1
]}

Schafer, Sebastian ^{[2
]}

Royalty, Kevin ^{[2
]}

Chen, Guang-Hong ^{[1
,3
]}

机构：

[1] Univ Wisconsin, Dept Med Phys, Madison, WI 53705 USA

[2] Siemens Med Solut, Hoffman Estates, IL 60192 USA

[3] Univ Wisconsin, Dept Radiol, Madison, WI 53792 USA

来源：

MEDICAL IMAGING 2014: PHYSICS OF MEDICAL IMAGING | 2014年 / 9033卷

关键词：

Scatter artifacts; Cone-beam CT; Monte Carlo; Single-scan; Polychromatic reprojection; Flat-panel detector; Patient-specific; X-RAY SCATTER; CONE-BEAM CT; CORRECTION ALGORITHM; IMAGE QUALITY; BLOCKER; SIMULATION; REDUCTION; RADIATION; MODULATION; REMOVAL;

D O I：

10.1117/12.2043923

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

This paper provides a fast and patient-specific scatter artifact correction method for cone-beam computed tomography (CBCT) used in image-guided interventional procedures. Due to increased irradiated volume of interest in CBCT imaging, scatter radiation has increased dramatically compared to 2D imaging, leading to a degradation of image quality. In this study, we propose a scatter artifact correction strategy using an analytical convolution-based model whose free parameters are estimated using a rough estimation of scatter profiles from the acquired cone-beam projections. It was evaluated using Monte Carlo simulations with both monochromatic and polychromatic X-ray sources. The results demonstrated that the proposed method significantly reduced the scatter-induced shading artifacts and recovered CT numbers.

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页数：7

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