Slit Radiography: Problems And Potential

James A. Sorenson; James A. Nelson

doi:10.1117/12.958929

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18 August 1980 Slit Radiography: Problems And Potential

James A. Sorenson, James A. Nelson

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Proceedings Volume 0233, Application of Optical Instrumentation in Medicine VIII; (1980) https://doi.org/10.1117/12.958929
Event: Application of Optical Instrumentation in Medicine VIII, 1980, Las Vegas, United States

Abstract

Slit radiography is a highly efficient technique for rejecting scattered radiation in x-ray imaging. In slit radiography, a large-field image is recorded by scanning a narrow x-ray beam across the object, so that all parts of the image are formed by a small x-ray field. Several investigators, including ourselves, have constructed slit radiography machines to test this principle. In general, slit radiography has been shown to be highly effective for eliminating scattered radiation, capable of reducing scatter intensity to less than 20% of the recorded x-ray beam. Problems with the technique also have been revealed, including: 1) the need for a very precise and mechanically rugged collimating apparatus to shape and scan the slit x-ray beams, 2) exceptionally high tube loading and/or exposure time requirements due to inefficient utilization of x-rays in forming narrow slit beams, and 3) insufficient latitude of currently available x-ray film types for recording the high contrast images generated by the slit technique, especially in procedures that already are latitude limited, such as chest radiography. The potential for practical implementation of slit radiography techniques, and their impact on diagnostic accuracy in light of these problems is discussed.

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James A. Sorenson and James A. Nelson "Slit Radiography: Problems And Potential", Proc. SPIE 0233, Application of Optical Instrumentation in Medicine VIII, (18 August 1980); https://doi.org/10.1117/12.958929

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