Detection of point landmarks in 3D medical images via phase congruency model

Brazilian Computer Society. Journal

Ricardo J. Ferrari¹  Andrew Hope³  Vladimir Pekar³  John Kim³  David Jaffray³  Sté⁴  phane Allaire⁵ 

[1] Department of Computer Sciences, Federal University of SãPhilips Research North America, Toronto, Markham, Canada;Princess Margaret Hospital, University of Toronto, Toronto, Canada;o Carlos (UFSCar), São Carlos, Brazil

关键词: Point landmarks;    3D hase congruency;    3D log-Gabor filters;    Wavelets;    Nonrigid registration;    Radiation therapy;   

DOI  :  10.1007/s13173-011-0032-8

学科分类：农业科学（综合）

来源: Springer U K

【 摘 要 】

This paper presents a novel technique for detection of point landmarks in volumetric medical images based on a three-dimensional (3D) Phase Congruency (PC) model. A bank of 3D log-Gabor filters is specially designed in the frequency domain and used to compute 3D energy maps, which are further combined to form the phase congruency measure. The PC measure is invariant to intensity variations and contrast resolution and provides a good indication of feature significance in an image. To detect significant 3D point landmarks, eigen-analysis of a 3×3 matrix of second-order PC moments, computed for each point in the image, is performed followed by local maxima detection. Two different application scenarios in radiation therapy planning of the head and neck anatomy are used to illustrate the feasibility and usefulness of the proposed method.

【 授权许可】

CC BY