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

fYear

2012

fDate

April 29 2012-May 2 2012

Firstpage

1

Lastpage

4

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;

fLanguage

English

Publisher

ieee

Conference_Titel

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

Conference_Location

Montreal, QC

ISSN

0840-7789

Print_ISBN

978-1-4673-1431-2

Electronic_ISBN

0840-7789

Type

conf

DOI

10.1109/CCECE.2012.6334912

Filename

6334912