title: A New Method to Get More Robust MTF Curve.
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.
authors.affiliation: Department of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200030, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.forename: Xueli
authors.initials: X
authors.lastname: Wang
authors.forename: Tian-Ge
authors.initials: TG
authors.lastname: Zhuang