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Radiology, Vol 150, 225-229, Copyright © 1984 by Radiological Society of North America

ARTICLES

Self-masking subtraction tomosynthesis

DP Chakraborty, MV Yester, GT Barnes and AV Lakshminarayanan

The authors tested the image quality and dose savings of self-masking subtraction tomosynthesis (SST), which combines digital tomosynthesis with subtraction of a blurred self-mask. High-quality images of the inner ear of a head phantom were obtained at moderate dose savings. Although they were taken with linear motion, they did not exhibit the streaking due to off-fulcrum objects that is characteristic of conventional linear tomography. SST could reduce patient dose by a factor of at least 12 in examinations of the inner ear, and the mechanical aspects can be implemented with moderate modifications of existing instrumentation.




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