The ODCAT: One Dimensional Coded Aperture Tomography

Michael D. Tipton

doi:10.1117/12.938203

15 November 1978 The ODCAT: One Dimensional Coded Aperture Tomography

Michael D. Tipton

Proceedings Volume 0152, Recent and Future Developments in Medical Imaging I; (1978) https://doi.org/10.1117/12.938203
Event: 22nd Annual Technical Symposium, 1978, San Diego, United States

Abstract

Current emission computed tomographic (ECT) scanners suffer from the inability to perform dynamic studies. The investigation presented here was initiated with a specific goal in mind, that is, to design a system to image a radionuclide distribution in cross-section in a stationary arrangement capable of dynamic data acquisition. Two systems are proposed. Both systems utilize a two-dimensional cross-section type of geometry. The first consists of multiple pinhole apertures each with its own separate one-dimensional detector. The second system employs coded-aperture techniques and is a result of allowing the projections from each pinhole aperture to overlap. The initial reconstructed image with both systems is degraded by a high level of correlated background noise. This background is significantly reduced by an iterative subtraction technique which is described. Computer simulations are presented to illustrate the technique.

Citation Download Citation

Michael D. Tipton "The ODCAT: One Dimensional Coded Aperture Tomography", Proc. SPIE 0152, Recent and Future Developments in Medical Imaging I, (15 November 1978); https://doi.org/10.1117/12.938203

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