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Computation of detective quantum efficiency of medical x-ray radiographic screen-films

Detective quantum efficiency (DQE) is one of the important measures in the assessment of image quality and detector performance. Detective quantum efficiency of radiographic screen-film depends on noise power spectrum (NPS), modulation transfer function (MTF), gamma of the film and photon fluence. D...

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Main Author: Khanmirzaei, Mohammad Hassan
Format: Thesis
Language:English
Published: 2010
Subjects:
QC Physics
Online Access:http://eprints.utm.my/id/eprint/16333/7/MohammadHassanKhanmirzaeiMFSA2010.pdf
http://eprints.utm.my/id/eprint/16333/
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spelling my.utm.163332017-09-13T00:54:40Z http://eprints.utm.my/id/eprint/16333/ Computation of detective quantum efficiency of medical x-ray radiographic screen-films Khanmirzaei, Mohammad Hassan QC Physics Detective quantum efficiency (DQE) is one of the important measures in the assessment of image quality and detector performance. Detective quantum efficiency of radiographic screen-film depends on noise power spectrum (NPS), modulation transfer function (MTF), gamma of the film and photon fluence. DQE of two types of screenfilms namely Lanex Regular/T-Mat G/RA and Lanex Regular/T-Mat L/RA were determined using MTF and NPS data, separately. For calculation of gamma of the film, characteristic curves of each screen-film were used to find slope of straight part of the curves. Photon fluence was estimated using published literature. DQE of the screenfilms were computed by MATLAB program for three optical densities 0.7, 1.0 and 1.4. The X-ray source was at 81 kVP. MTF of Lanex Regular/T-Mat G/RA was found to be slightly better than Lanex Regular/T-Mat L/RA for spatial frequencies between 0.5 and 3.0, but it was found to be slightly better MTF for Lanex Regular/T-Mat L/RA for spatial frequencies between 5.2 and 7.0. NPS of Lanex Regular/TMat G/RA was found one and a half times bigger than Lanex Regular/T-Mat L/RA. DQE comparison of these two types of screen-films was made. The results show Lanex Regular/T-Mat G/RA has better DQE than Lanex Regular/T-Mat L/RA, at low frequencies. 2010 Thesis NonPeerReviewed application/pdf en http://eprints.utm.my/id/eprint/16333/7/MohammadHassanKhanmirzaeiMFSA2010.pdf Khanmirzaei, Mohammad Hassan (2010) Computation of detective quantum efficiency of medical x-ray radiographic screen-films. Masters thesis, Universiti Teknologi Malaysia, Faculty of Science.
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic QC Physics
spellingShingle QC Physics
Khanmirzaei, Mohammad Hassan
Computation of detective quantum efficiency of medical x-ray radiographic screen-films
description Detective quantum efficiency (DQE) is one of the important measures in the assessment of image quality and detector performance. Detective quantum efficiency of radiographic screen-film depends on noise power spectrum (NPS), modulation transfer function (MTF), gamma of the film and photon fluence. DQE of two types of screenfilms namely Lanex Regular/T-Mat G/RA and Lanex Regular/T-Mat L/RA were determined using MTF and NPS data, separately. For calculation of gamma of the film, characteristic curves of each screen-film were used to find slope of straight part of the curves. Photon fluence was estimated using published literature. DQE of the screenfilms were computed by MATLAB program for three optical densities 0.7, 1.0 and 1.4. The X-ray source was at 81 kVP. MTF of Lanex Regular/T-Mat G/RA was found to be slightly better than Lanex Regular/T-Mat L/RA for spatial frequencies between 0.5 and 3.0, but it was found to be slightly better MTF for Lanex Regular/T-Mat L/RA for spatial frequencies between 5.2 and 7.0. NPS of Lanex Regular/TMat G/RA was found one and a half times bigger than Lanex Regular/T-Mat L/RA. DQE comparison of these two types of screen-films was made. The results show Lanex Regular/T-Mat G/RA has better DQE than Lanex Regular/T-Mat L/RA, at low frequencies.
format Thesis
author Khanmirzaei, Mohammad Hassan
author_facet Khanmirzaei, Mohammad Hassan
author_sort Khanmirzaei, Mohammad Hassan
title Computation of detective quantum efficiency of medical x-ray radiographic screen-films
title_short Computation of detective quantum efficiency of medical x-ray radiographic screen-films
title_full Computation of detective quantum efficiency of medical x-ray radiographic screen-films
title_fullStr Computation of detective quantum efficiency of medical x-ray radiographic screen-films
title_full_unstemmed Computation of detective quantum efficiency of medical x-ray radiographic screen-films
title_sort computation of detective quantum efficiency of medical x-ray radiographic screen-films
publishDate 2010
url http://eprints.utm.my/id/eprint/16333/7/MohammadHassanKhanmirzaeiMFSA2010.pdf
http://eprints.utm.my/id/eprint/16333/
_version_ 1643646530691792896
score 13.251813

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