A New Method to Get More Robust MTF Curve

Author

Zhang, Wei ; Wang, Xueli ; Tian-ge Zhuang

Author_Institution

Dept. of Biomed. Eng., Shanghai Jiao Tong Univ.

fYear

2006

Firstpage

1743

Lastpage

1746

Abstract

This paper presents a method to locate wire center on performance phantom image to get MTF curve during CT spatial resolution measurement. We get the circular edge of the wire area by automatic threshold segmentation and edge tracking. After that, using Hough transform, we can locate the wire center automatically. Compared with old method, it´s immune to noise and more convenient to operate. Experimental results show that new method is accurate and gets less standard deviation sum of x-coordinate and y-coordinate of center point

Keywords

Hough transforms; computerised tomography; image resolution; image segmentation; medical image processing; optical transfer function; phantoms; CT spatial resolution measurement; Hough transform; automatic threshold segmentation; edge tracking; modulation transfer function; phantom image; robust MTF curve; wire center location; Biomedical engineering; Biomedical measurements; Computed tomography; Fourier transforms; Frequency domain analysis; Imaging phantoms; Medical services; Robustness; Spatial resolution; Wire;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 2005. IEEE-EMBS 2005. 27th Annual International Conference of the

Conference_Location

Shanghai

Print_ISBN

0-7803-8741-4

Type

conf

DOI

10.1109/IEMBS.2005.1616782

Filename

1616782