New spherical PET design with fresnel aperture orientation
✍ Scribed by Z. H. Cho; Y. S. Kim; S. K. Hilal; Y. H. Kim
- Publisher
- John Wiley and Sons
- Year
- 1989
- Tongue
- English
- Weight
- 727 KB
- Volume
- 1
- Category
- Article
- ISSN
- 0899-9457
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✦ Synopsis
A new spherical PET using Fresnel aperture is being designed, and construction is in progress. In the new design, the original spherical geometry is modified to accommodate a more flexible gantry construction and data processing while preserving the focused geometry of the original design. The performance of this new Fresnel aperture-SPET (F-SPET) is expected to follow closely with that of the original S-PET design. An analysis of an F-SPET designed with nine modular layers, with each modular layer being four rings, was performed in terms of the counting statistics and solid angle and compared with the original S-PET as well as the conventional cylindrical PET. According to the simulation results, the sensitivity gain of the Fresnel aperture-SPET remains a factor of 2 over the equivalent cylindrical system and has nearly the same performance as the original S-PET, while offering a simpler means in construction and data handling for the image reconstruction.