Siemens Medical Solutions Usa, Inc.

Derek W Austin

Robert A Mintzer

Stefan B Siegel

Mu Chen

Anne M Smith

Bing Feng

Casey Barrett Holbrook

A system and method for reconstructing single photon emission computed tomography data acquired with a pinhole collimator includes sub-dividing each voxel in the imaging target object space into sub-voxels and sub-dividing each of the detector bins in the gamma camera detector into sub-bins, connecting the centers of each of the sub-voxels to each of the detector sub-bins through a pinhole provided in the pinhole collimator by ray tracing and for each ray connecting the centers of each of the sub-voxels to each of the detector sub-bins, the transmission probability is calculated by analytically solving the intersections between the ray and the pinhole surfaces. Then, a geometric-response-function of the pinhole collimator is computed which is then convolved with the intrinsic-response-function of the detector to obtain the PSF.

Modeling of the point-spread-function in single-pinhole and multi-pinhole spect reconstruction

A grid suitable for being positioned and held in relation to a detector has positive positioning means and at least one magnet for holding the grid.

Magnetically retained interchangeable collimators for scintillation cameras

Growing community of inventors

Knoxville, TN, United States of America

Derek W Austin