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Proceedings Paper

Investigation of parameters concerning the modulation transfer function in digital radiography
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Paper Abstract

The effects of the design of a radiographic system on the modulation transfer function (MTF) are studied with a specially developed computer program. The program simulates a digital radiographic system by using three parameters: sampling distance, sampling aperture, and the spread of the signal in the detector due to the interaction processes of the incoming photons. The signal spread is approximated by Gaussian distributions. The influence of the three parameters is studied on the presampling MTF and on the two extreme cases of the digital MTF: the maximum MTF and the minimum MTF. From theoretical data on the interaction processes, the resolution properties of an amorphous selenium flat-panel detector are simulated. The program is also used to simulate a measurement of the presampling MTF with the slit method, and the effect of the slit width on the measured presampling MTF is examined.

Paper Details

Date Published: 28 June 2001
PDF: 12 pages
Proc. SPIE 4320, Medical Imaging 2001: Physics of Medical Imaging, (28 June 2001); doi: 10.1117/12.430933
Show Author Affiliations
Magnus Bath, Goteborg Univ. (Sweden)
Patrik Sund, Goteborg Univ. and Sahlgrenska Univ. Hospital/Goteborg Univ. (Sweden)
Lars Gunnar Mansson, Goteborg Univ. and Sahlgrenska Univ. Hospital/Goteborg Univ. (Sweden)


Published in SPIE Proceedings Vol. 4320:
Medical Imaging 2001: Physics of Medical Imaging
Larry E. Antonuk; Martin Joel Yaffe, Editor(s)

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