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Dental digital radiography evaluation system: Modulation transfer function and noise power spectrum dependence on the radiation dose

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5 Author(s)
Leao, T.F.C. ; Dept. of Biomed. Eng., Univ. of Campinas, Campinas, Brazil ; Santos, D.F. ; Boscoli, F.N. ; Neto, F.H.
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The purposes of this paper are to present a new user-friendly software package intended for evaluating the performance of dental digital radiography systems, and to study the effect of the radiation dose on the resolution and noise properties of photo-stimulable-phosphor-layer (PSPL) detectors. The modulation transfer function (MTF) was measured using the edge method and the noise power spectrum (NPS) by taking the two-dimensional Fourier transform of the images of a uniformly exposed test device. The MTF was found to be not affected by the radiation dose, whereas the NPS was strongly dependent on it.

Published in:

Electrical & Computer Engineering (CCECE), 2012 25th IEEE Canadian Conference on

Date of Conference:

April 29 2012-May 2 2012