Evaluation of two Software Tools dedicated to an Automatic Analysis of the CT Scanner Image Spatial Resolution

Author

Torfeh, T. ; Beaumont, S. ; Guedon, J.-P. ; Denis, E.

Author_Institution

Ecole Polytech. de l´Univ. de Nantes, Nantes

fYear

2007

fDate

22-26 Aug. 2007

Firstpage

3910

Lastpage

3913

Abstract

An evaluation of two software tools dedicated to an automatic analysis of the CT scanner image spatial resolution is presented in this paper. The methods evaluated consist of calculating the modulation transfer function (MTF) of the CT scanners; the first uses an image of an impulse source, while the second method proposed by Droege and Morin uses an image of cyclic bar patterns. Two digital test objects (DTO) are created to this purpose. These DTOs are then blurred by doing a convolution with a two-dimensional Gaussian point spread function (PSF_Ref), which has a well known full width at half maximum (FWHM). The evaluation process consists then of comparing the Fourier transform of the PSF on the one hand, and the two mentioned methods on the other hand.

Keywords

computerised tomography; medical computing; medical image processing; CT image spatial resolution; CT scanner MTF; DTO blurring; PSF Fourier transform; automatic CT image analysis; cyclic bar pattern image; digital test objects; impulse source image; modulation transfer function; point spread function; software evaluation; Automatic control; Computed tomography; Fourier transforms; Image analysis; Image quality; Software quality; Software tools; Spatial resolution; Testing; Transfer functions; Image Processing, Computer-Assisted; Software; Tomography, X-Ray Computed;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 2007. EMBS 2007. 29th Annual International Conference of the IEEE

Conference_Location

Lyon

ISSN

1557-170X

Print_ISBN

978-1-4244-0787-3

Type

conf

DOI

10.1109/IEMBS.2007.4353188

Filename

4353188