Slanting EDGE method for modulation transfer function computation of X-Ray system

The edge method is commonly used to determine the modulation transfer function (MTF) of a straight edge image in radiography systems. Measurement of MTF by using slanting edge method is an important way to evaluate the quality of a slanted edge image, as it is difficult to acquire a straight image....

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Main Author:	Saber Braim, Farhank
Format:	Thesis
Language:	English
Published:	2013
Subjects:	QC Physics
Online Access:	http://eprints.utm.my/id/eprint/33285/1/FarhankSaberBraimMFS2013.pdf
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spelling	my-utm-ep.332852017-09-17T01:32:25Z Slanting EDGE method for modulation transfer function computation of X-Ray system 2013-01 Saber Braim, Farhank QC Physics The edge method is commonly used to determine the modulation transfer function (MTF) of a straight edge image in radiography systems. Measurement of MTF by using slanting edge method is an important way to evaluate the quality of a slanted edge image, as it is difficult to acquire a straight image. Slanted edge image offers more data by reprojection of the data to the slanted line, and gives more points in the edge spread function (ESF). Straight and slanted edge images data were used to measure the ESF, the line spread function (LSF) and the presampled MTF using MATLAB R2011a program. Edge images were taken from a thick lead foil in a conventional radiographic screen-film system, and a , thick aluminium test objects with a thick lead in a Fuji computed radiography (FCR) system. Edge images of lead test devices provide higher MTFs than that of aluminiums. The MTF values of slanted edge images were compared to those obtained by straight edge images for spatial frequency range about . The MTF results of lead test devices for conventional and computed radiographic systems are similar, although the computed system has better MTF for spatial frequencies between and with a very low fluctuation due to the extremely small noise. However, for the conventional system has better and higher MTFs for both straight and slanted images. In the conventional radiographic system, the experimental MTF results are accepted by the method with the mean MTF difference of for the straight (0 degress) and the slanted with (2 degress) of edge images for spatial frequencies between and . On the other hand, the mean MTF difference for the straight (0 degress) and slanted (1 and 2 degress) resultant MTFs in the computed radiographic system are and respectively. The best MTF result was obtained from the slanted edge image (2 degress) in the FCR system. 2013-01 Thesis http://eprints.utm.my/id/eprint/33285/ http://eprints.utm.my/id/eprint/33285/1/FarhankSaberBraimMFS2013.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:67953?site_name=Restricted Repository masters Universiti Teknologi Malaysia, Faculty of Science Faculty of Science
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	QC Physics
spellingShingle	QC Physics Saber Braim, Farhank Slanting EDGE method for modulation transfer function computation of X-Ray system
description	The edge method is commonly used to determine the modulation transfer function (MTF) of a straight edge image in radiography systems. Measurement of MTF by using slanting edge method is an important way to evaluate the quality of a slanted edge image, as it is difficult to acquire a straight image. Slanted edge image offers more data by reprojection of the data to the slanted line, and gives more points in the edge spread function (ESF). Straight and slanted edge images data were used to measure the ESF, the line spread function (LSF) and the presampled MTF using MATLAB R2011a program. Edge images were taken from a thick lead foil in a conventional radiographic screen-film system, and a , thick aluminium test objects with a thick lead in a Fuji computed radiography (FCR) system. Edge images of lead test devices provide higher MTFs than that of aluminiums. The MTF values of slanted edge images were compared to those obtained by straight edge images for spatial frequency range about . The MTF results of lead test devices for conventional and computed radiographic systems are similar, although the computed system has better MTF for spatial frequencies between and with a very low fluctuation due to the extremely small noise. However, for the conventional system has better and higher MTFs for both straight and slanted images. In the conventional radiographic system, the experimental MTF results are accepted by the method with the mean MTF difference of for the straight (0 degress) and the slanted with (2 degress) of edge images for spatial frequencies between and . On the other hand, the mean MTF difference for the straight (0 degress) and slanted (1 and 2 degress) resultant MTFs in the computed radiographic system are and respectively. The best MTF result was obtained from the slanted edge image (2 degress) in the FCR system.
format	Thesis
qualification_level	Master's degree
author	Saber Braim, Farhank
author_facet	Saber Braim, Farhank
author_sort	Saber Braim, Farhank
title	Slanting EDGE method for modulation transfer function computation of X-Ray system
title_short	Slanting EDGE method for modulation transfer function computation of X-Ray system
title_full	Slanting EDGE method for modulation transfer function computation of X-Ray system
title_fullStr	Slanting EDGE method for modulation transfer function computation of X-Ray system
title_full_unstemmed	Slanting EDGE method for modulation transfer function computation of X-Ray system
title_sort	slanting edge method for modulation transfer function computation of x-ray system
granting_institution	Universiti Teknologi Malaysia, Faculty of Science
granting_department	Faculty of Science
publishDate	2013
url	http://eprints.utm.my/id/eprint/33285/1/FarhankSaberBraimMFS2013.pdf
_version_	1747816124465020928

Slanting EDGE method for modulation transfer function computation of X-Ray system

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