Low-dose 4DCT reconstruction via temporal nonlocal means.

  title={Low-dose 4DCT reconstruction via temporal nonlocal means.},
  author={Z. T. Tian and Xun Jia and Bin Dong and Yifei Lou and Steve B. Jiang},
  journal={Medical physics},
  volume={38 3},
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 its clinical application. This work is to develop a new algorithm to reconstruct 4DCT images from undersampled projections acquired at low mA s levels… CONTINUE READING