Preprocessing X-Ray Transmission Data In CT Scanning

Michael J. Dennis; Robert G. Waggener; William D. McDavid; William H. Payne; Victor J. Sank

doi:10.1117/12.965402

23 December 1976 Preprocessing X-Ray Transmission Data In CT Scanning

Michael J. Dennis, Robert G. Waggener, William D. McDavid, William H. Payne, Victor J. Sank

Proceedings Volume 0096, Application of Optical Instrumentation in Medicine V; (1976) https://doi.org/10.1117/12.965402
Event: Application of Optical Instrumentation in Medicine V, 1976, Washington, D.C., United States

Abstract

While the reconstruction algorithm utilized in computerized tomography (CT) is important, the overall performance of the system is limited by the quality of the measured transmission data which is used as the basis for the reconstruction process. If the projection values derived from the measured data do not adequately represent the line integrals of the linear attenuation coefficients within the slice being scanned, even a perfect reconstruction algorithm will give rise to a distorted image. Phenomena which tend to deteriorate the quality of the measured data, and hence the final image, include the effective finite dimensions of the scanning aperture, distortions introduced by the detector system such as afterglow, and nonlinearities related to the spectral distribution of x-ray photons used in scanning. Computer methods of preprocessing the x-ray transmission data to minimize these distortions are discussed and illustrated.

Citation Download Citation

Michael J. Dennis, Robert G. Waggener, William D. McDavid, William H. Payne, and Victor J. Sank "Preprocessing X-Ray Transmission Data In CT Scanning", Proc. SPIE 0096, Application of Optical Instrumentation in Medicine V, (23 December 1976); https://doi.org/10.1117/12.965402

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