Abstract
The quality of images reconstructed by statistical iterative methods depends on an accurate model of the relationship between image space and projection space through the system matrix. The elements of a system matrix on the HiRez scanner from CPS Innovations were acquired by positioning a point source at different positions in the scanner field of view. Then, a whole system matrix was derived by processing the responses in projection space. Such responses included both geometrical and detection physics components of the system matrix. The response was parameterized to correct for point source location, smooth projection noise and the whole system matrix was derived. The model accounts for axial compression (span) used on the scanner. The projection operator for iterative reconstruction was constructed using the estimated response parameters. Computer-generated and acquired data were used to compare reconstruction obtained by the HiRez standard software and that produced by better modeling. Results showed that better resolution and noise property can be achieved with the modeled system matrix.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
