Low‐dose 4DCT reconstruction via temporal nonlocal means
Low‐dose 4DCT reconstruction via temporal nonlocal means
Purpose: Four‐dimensional computed tomography (4DCT) has been widely used in cancer radiotherapy for accurate target delineation and motion measurement for tumors in the thorax and upper abdomen areas. However, its prolonged scanning duration causes a considerable increase of radiation dose compared to conventional CT, which is a major concern in …