The effect of scan position consistency on automatic registration of computer tomography-magnetic resonance images in patients with nasopharyngeal carcinoma
10.3760/cma.j.issn.1004-4221.2009.06.435
- VernacularTitle:体位一致性对鼻咽癌CT-MR图像自动配准精度的影响
- Author:
Zhanyu WANG
;
Haixin HUANG
;
Dongning HUANG
;
Yusong LONG
- Publication Type:Journal Article
- Keywords:
Tomography,X-ray computed;
Magnetic resonance imaging;
Image registration;
Consistency of position
- From:
Chinese Journal of Radiation Oncology
2009;18(6):435-437
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the effect of scan position consistency on computer tomography-magnetic resonance (CT-MR) images automatic registration in patients with nasopharyngeal carcinoma.Methods Fifteen patients with nasopharyngeal carcinoma were enrolled in this study and scanned with the same position to acquire CT images and MR-1 images. Then they were reacanned with different position for MR-2 images. Image registration of CT-MR-1 and CT-MR-2 was finished using mutual information method.The registration errors were evaluated by measuring the distances between marks. Results The error of au-tomatic CT-MR registration with consistent scan position was 1.32 nun, comparing with the minimum of 2.00 ram and the maximum of 3.83 mm with different positions. Conclusion Keeping consistent scan position can improve the accuracy of image registration.
