Analysis of MRI-CT image registration accuracy by Tris-Axes Landmark
- VernacularTitle:标点法MRI-CT图像融合的融合精度分析
- Author:
Danming LI
;
Xixu ZHU
;
Xinhu WU
;
Shuping GAO
- Publication Type:Journal Article
- Keywords:
Image registration;
Radiotherapy
- From:
Journal of Medical Postgraduates
2003;0(12):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To study the accuracy of MRI-CT image registration in order to find a more effective method of image fusion and a standard for the evaluation of post-operative intra-cranial tumor radiotherapy.Methods: Twenty-four patients with intra-cranial tumor underwent MR T1-weighed sequence and post-operative location CT scan under the same location condition.The trans-axial MR T1-weighed sequence and CT image were registered and the correlation between registration scores and errors was analyzed by the method of Tris-Axes Landmark.The linear registration errors were observed in the three-dimensional space of every patient.Results: An improved linear correlation was found between registration scores and errors(r=-0.985,y=-0.551 3x+5.351 4).The registration met the clinical standard when the scores exceeded 6.61.Conclusion: Tris-Axes Landmark is a preferable registration method to be used in clinical radiotherapy for rapid and precise evaluation of MRI-CT image registration accuracy.
