Title :
Fan-beam reconstruction from a straight line of source points
Author :
Smith, Bruce D. ; Singh, Tarkeshwar
Author_Institution :
Dept. of Electr. & Comput. Eng., Cincinnati Univ., OH, USA
fDate :
3/1/1993 12:00:00 AM
Abstract :
A fan-beam tomographic reconstruction algorithm is developed for source points distributed along a straight line. It is shown that, in theory, a perfect reconstruction is possible from an infinitely long straight line. Using computer simulations it is verified that using a finite segment of a straight line, it is possible to reconstruct images with quality comparable to those obtained when the source points are distributed along a circle. It is shown that the two parameters that most affect the image quality are the length of source point line, and the distance from the object to the source point line. In addition, a postreconstruction technique is developed that substantially improves the quality of images reconstructed from the straight line
Keywords :
computerised tomography; image reconstruction; computer simulations; fan-beam tomographic reconstruction algorithm; image quality improvement; infinitely long straight line; medical diagnostic imaging; postreconstruction technique; source points; Cameras; Computed tomography; Computer simulation; Convolution; Detectors; Image quality; Image reconstruction; Image segmentation; Interpolation; Positrons;
Journal_Title :
Medical Imaging, IEEE Transactions on
