Analytic Determination of Rectangular-Pinhole Sensitivity With Penetration.

ABSTRACT: Modern small-animal SPECT systems use multiple pinhole collimators per detector to increase sensitivity while still maintaining high resolution. This resolution is a combination of aperture resolution combined with detector resolution, which is mitigated by magnification. Higher magnification results in better resolution, but fewer apertures per detector. When multiple pinhole collimators project onto the same detector, those with a rectangular field of view (FOV) can be packed more tightly than those with a circular FOV. In addition, a rectangular aperture can be used to obtain different resolution-sensitivity tradeoffs in the two orthogonal directions. Thus, these rectangular-pinhole collimators can have independent FOVs and independent resolution values in the two directions of the rect

SUBMITTER: Metzler SD 

PROVIDER: S-EPMC7241287 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature