再構成演算装置、再構成演算方法、及びX線CT装置
- 专利权人:
- 株式会社日立メディコ
- 发明人:
- 後藤 大雅,廣川 浩一,高橋 悠
- 申请号：
- JP2010015030
- 公开号：
- JP5406063B2
- 申请日:
- 2010.01.27
- 申请国别(地区):
- JP
- 年份:
- 2014
- 代理人:
- 摘要：
PROBLEM TO BE SOLVED: To provide a reconstruction arithmetic unit, a reconstruction arithmetic method, and an X-ray CT apparatus which are capable of forming speedily and accurately an X-ray CT image effective for medical diagnosis.
SOLUTION: The reconstruction arithmetic unit 45 carries out first reconstruction processing including successive approximation processing with respect to X-ray projection data acquired by photography using a predetermined scan trajectory, and forms a first image having good image quality with reduced cone beam artifacts. The reconstruction arithmetic unit then carries out imaginary forward projection with respect to the first image by using a scan trajectory having less artifact contamination compared to that used in the photography, sets desired frequency, FOV or the like on the basis of the forward projection data, and reconstructs a CT image by means of an analytical reconstruction method (second reconstruction). Accordingly, a final image having desired characteristic is formed while maintaining the image quality of the first image.
COPYRIGHT: (C)2011,JPO&INPIT
- 来源网站：
- 中国工程科技知识中心
