PMID: 11318317Apr 25, 2001Paper

Determination of the presampled MTF in computed tomography

Medical Physics
John M Boone

Abstract

A technique for measuring the presampled MTF in CT scanners is described. The technique uses a simple phantom consisting of approximately 0.050 mm aluminum foil sandwiched by flat plastic or tissue-equivalent slabs. The aluminum foil is slightly angled with respect to the reconstruction matrix, and CT images are acquired. The acquired CT image yields an angled slit image that can be used to synthesize the presampled line spread function (LSF). The presampled MTF is calculated from the presampled LSF. The technique is a direct extension of that proposed by Fujita et al. [IEEE Trans. Med. Imaging 11, 34-39 (1992)] for MTF calculation on digital radiography images. While the MTF in clinical CT scanners often reaches negligible amplitude below the Nyquist frequency, the technique is easy to implement, requires inexpensive materials, is robust to aliasing, and is more resilient to noise due to greater data averaging than conventional PSF-integration techniques. Use of the proposed technique is illustrated on a clinical multiple detector array scanner, and MTFs are shown for several common reconstruction kernels. It is likely that the proposed technique would be useful for all tomographic imaging systems, including single photon emis...Continue Reading

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Citations

Sep 27, 2008·European Radiology·Stefan C SaurPhilippe C Cattin
Nov 13, 2007·Medical & Biological Engineering & Computing·Masaki OhkuboKanae Nishizawa
Jan 1, 2009·Radiological Physics and Technology·Issei Mori, Yoshio Machida
Aug 4, 2012·Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)·Frédéric A MiévilleFrançois R Verdun
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Mar 28, 2012·Nihon Hoshasen Gijutsu Gakkai zasshi·Tomoyuki UtoKeisuke Isotani
Jul 29, 2006·Nihon Hoshasen Gijutsu Gakkai zasshi·Miwa OkumuraKazuhiro Katada
Mar 4, 2008·Nihon Hoshasen Gijutsu Gakkai zasshi·Takanori HaraShinji Niwa
Nov 8, 2007·Medical Physics·Baojun LiJiang Hsieh
Jan 7, 2014·Medical Physics·Amirreza PakdelCari M Whyne
Feb 7, 2007·Medical Physics·Alexander L C KwanShih-Ying Huang
Mar 3, 2012·Medical Physics·G P FountosI S Kandarakis
Jan 30, 2009·Medical Physics·Kai YangJohn M Boone
Jun 2, 2014·Radiological Physics and Technology·Atsushi UrikuraYoshihiro Nakaya
Jul 16, 2014·Radiographics : a Review Publication of the Radiological Society of North America, Inc·Eric C EhmanJoel G Fletcher
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