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1 January 1986 Three-Dimensional Single-Photon Emission Computed Tomography Using Cone Beam Collimation (CB-SPECT)
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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 Jr., Stephen H. Manglos, Kim L. Greer, and 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);

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