KABUSHIKI KAISHA TOSHIBA;TOSHIBA MEDICAL SYSTEMS CORPORATION
发明人:
Alexander ZAMYATIN,Satoru NAKANISHI,Be-Shan CHIANG,Thomas LABNO
申请号：
US14457267
公开号：
US20160048983A1
申请日:
2014.08.12
申请国别(地区):
US
年份:
2016
代理人:
摘要：
Cone beam artifacts arise in circular CT reconstruction. The cone beam artifacts are substantially removed by reconstructing a reference image from measured data at circular source trajectory, differentiating the reference image； generating synthetic data by forward projection of the differentiated reference image along a pre-determined source trajectory, which supplements the circular source trajectory to a theoretically complete trajectory, reconstructing a correction image from the synthetic data and optionally applying a scaling factor. Ultimately, the cone beam artifact is substantially reduced by generating a corrected image using the reference image and the correction image that has been optimally scaled based upon the adaptively determined scaling factor value.
