Investigation of parameters concerning the modulation transfer function in digital radiography

Magnus Bath; Patrik Sund; Lars Gunnar Mansson

doi:10.1117/12.430933

28 June 2001 Investigation of parameters concerning the modulation transfer function in digital radiography

Magnus Bath, Patrik Sund, Lars Gunnar Mansson

Proceedings Volume 4320, Medical Imaging 2001: Physics of Medical Imaging; (2001) https://doi.org/10.1117/12.430933
Event: Medical Imaging 2001, 2001, San Diego, CA, United States

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.

Citation Download Citation

Magnus Bath, Patrik Sund, and Lars Gunnar Mansson "Investigation of parameters concerning the modulation transfer function in digital radiography", Proc. SPIE 4320, Medical Imaging 2001: Physics of Medical Imaging, (28 June 2001); https://doi.org/10.1117/12.430933

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