1 January 1986 Three-Dimensional Single-Photon Emission Computed Tomography Using Cone Beam Collimation (CB-SPECT)
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Abstract
A simple and economically practical method of improving the sensitivity of camera-based SPECT was developed using converging (cone-beam) collimation. This geometry is particularly advantageous for SPECT devices using large field-of-view cameras in imaging smaller, centrally located activity distributions. Geometric sensitivities, spatial resolutions, and fields-of-view of a cone-beam collimator having a focal length of 48 cm and a similarly designed parallel hole collimator were compared analytically. At 15 cm from the collimator surface the point-source sensitivity of the cone-beam collimator was 2.4 times the sensitivity of the parallel-hole collimator. SPECT projection data (simulated using Monte Carlo methodology) were reconstructed using a 3-D filtered backprojection algorithm. Cone-beam emission CT (CE-SPECT) seems potentially useful for animal investigations, pediatric studies, and for brain imaging.
© (1986) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ronald J. Jaszczak, Carey E. Floyd, Stephen H. Manglos, Kim L. Greer, R. Edward Coleman, "Three-Dimensional Single-Photon Emission Computed Tomography Using Cone Beam Collimation (CB-SPECT)", Proc. SPIE 0671, Physics and Engineering of Computerized Multidimensional Imaging and Processing, (1 January 1986); doi: 10.1117/12.966697; https://doi.org/10.1117/12.966697
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KEYWORDS
Collimators

Single photon emission computed tomography

Cameras

Monte Carlo methods

Collimation

Spatial resolution

Brain

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