Title :
Dental digital radiography evaluation system: Modulation transfer function and noise power spectrum dependence on the radiation dose
Author :
Leao, T.F.C. ; Santos, D.F. ; Boscoli, F.N. ; Neto, F.H. ; Costa, E.T.
Author_Institution :
Dept. of Biomed. Eng., Univ. of Campinas, Campinas, Brazil
fDate :
April 29 2012-May 2 2012
Abstract :
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.
Keywords :
X-ray apparatus; biomedical equipment; dentistry; diagnostic radiography; electron device noise; medical computing; software packages; transfer functions; 2D Fourier transform; MTF; NPS; PSPL detector noise properties; PSPL detector resolution; dental digital radiography systems; edge method; modulation transfer function; noise power spectrum; photostimulable phosphor layer detectors; radiation dose effects; radiography system performance evaluation; software package; Dentistry; Detectors; Image edge detection; Modulation; Noise; Radiography; X-ray imaging; Modulation transfer function; dental digital systems; noise power spectrum;
Conference_Titel :
Electrical & Computer Engineering (CCECE), 2012 25th IEEE Canadian Conference on
Conference_Location :
Montreal, QC
Print_ISBN :
978-1-4673-1431-2
Electronic_ISBN :
0840-7789
DOI :
10.1109/CCECE.2012.6334912
