Two different tomographic scanning instruments have been interfaced to a digital computer. Digital backprojection is used to produce multiple tomographic images of radioactive distributions. Backprojection results in blur artifacts due to off-plane contributions which obscures the detail in images. The method of Chang, Macdonald, and Perez-Mendez has been applied to phantom data from both instruments, resulting in substantial blur removal and improved signal-to-noise ratios. Clinical images derived from digital back-projection of data from the Searle PHO/CON-192 Multiplane Imager are presented and compared with images from the Searle Microdot imager.
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Pickens et al. (1980) studied this question.
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