A novel method for reducing high attenuation object artifacts in CT reconstructions

被引：15

作者：

Chen, LG ^{[1
]}

Liang, Y ^{[1
]}

Sandison, GA ^{[1
]}

Rydberg, J ^{[1
]}

机构：

[1] Purdue Univ, Sch Hlth Sci, W Lafayette, IN 47907 USA

来源：

MEDICAL IMAGING 2002: IMAGE PROCESSING, VOL 1-3 | 2002年 / 4684卷

关键词：

computed tomography (CT); high attenuation object artifacts; metal artifact reduction; beam hardening correction;

D O I：

10.1117/12.467232

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

A new method to reduce the streak artifacts caused by high attenuation objects in CT images has been developed. The key part of this approach is a preprocessing procedure based on the raw projection data using an adaptive scaling-plus-filtering method. The procedure is followed by the conventional filtered-back projection to reconstruct artifact-reduced images. Phantom and clinical studies have demonstrated that the proposed method can effectively reduce the streak artifacts caused by high attenuation objects for different anatomical structures and metal materials while still faithfully reproduce the positions and dimensions of the metal objects. The visualization of tissue features adjacent to metal objects is greatly improved. The proposed method is computational efficient and can be easily adapted to the current commercial CT scanners.

引用

页码：841 / 850

页数：10

共 14 条

[1] Suppression of high-density artefacts in x-ray CT images using temporal digital subtraction with application to cryotherapy [J].