Related Experiment Video
Updated: Apr 15, 2026
11:34
High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
Published on: December 3, 2013
16.2K
The fan-beam short-scan FBP algorithm is not exact
1Department of Engineering, Weber State University, Ogden, UT 84408, USA. Department of Radiology, University of Utah, Salt Lake City, UT 84108, USA.
Physics in Medicine and Biology
|March 25, 2015
Abstract:
The fan-beam short-scan filtered backprojection (FBP) algorithm is popular in the computed tomography (CT) industry and in clinical applications. This paper points out that the fan-beam short-scan FBP algorithm is not exact, even in an ideal noiseless situation. The error depends on the focal length of the imaging geometry. When the focal length is long enough, the error is small and can therefore be ignored.
