Computed tomography commissioning programmes: how to obtain a reliable MTF with an automatic approach?

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Serval ID
serval:BIB_DFB5FCCD4CA9
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Computed tomography commissioning programmes: how to obtain a reliable MTF with an automatic approach?
Journal
Radiation Protection Dosimetry
Author(s)
Miéville F., Beaumont S., Torfeh T., Gudinchet F., Verdun F.R.
ISSN
1742-3406[electronic], 0144-8420[linking]
Publication state
Published
Issued date
2010
Volume
139
Number
1-3
Pages
443-448
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Abstract
The purpose of this study was to assess the spatial resolution of a computed tomography (CT) scanner with an automatic approach developed for routine quality controls when varying CT parameters. The methods available to assess the modulation transfer functions (MTF) with the automatic approach were Droege's and the bead point source (BPS) methods. These MTFs were compared with presampled ones obtained using Boone's method. The results show that Droege's method is not accurate in the low-frequency range, whereas the BPS method is highly sensitive to image noise. While both methods are well adapted to routine stability controls, it was shown that they are not able to provide absolute measurements. On the other hand, Boone's method, which is robust with respect to aliasing, more resilient to noise and provides absolute measurements, satisfies the commissioning requirements perfectly. Thus, Boone's method combined with a modified Catphan 600 phantom could be a good solution to assess CT spatial resolution in the different CT planes.
Pubmed
Web of science
Open Access
Yes
Create date
08/06/2010 15:32
Last modification date
01/10/2019 7:19
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