Assessment of Imaging Distortion in Magnetic Resonance Imaging for Stereotactic Radiosurgery: Through Phantom Study.
- Author:
Sun Won PARK
1
;
Moon Hee HAN
;
Dong Gyu KIM
;
Hyun Tai CHUNG
;
In Chan SONG
;
Hong Dae KIM
;
Kee Hyun CHANG
Author Information
1. Department of Radiology, Seoul National University College of Medicine.
- Publication Type:Original Article
- Keywords:
distortion;
MRI;
stereotactic rediosurgery;
stereotactic surgery;
phantom study
- MeSH:
Fiducial Markers;
Humans;
Magnetic Resonance Imaging*;
Radiosurgery*
- From:Journal of the Korean Society of Magnetic Resonance in Medicine
2000;4(1):7-13
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: To assess the distortion of MRI with the Leksell stereotactic radiosurgery system in variable pulse sequence and imaging plane through phantom study, to find most adequate imaging plane and pulse sequence for stereotactic radiosurgery system. MATERIALS AND METHODS: We made the phantoms for MRI and get images in variable conditions and analyzed the image distortion using image analysis program, and statistically using paired student t-test. RESULTS: The transeverse plane images had acceptable error ranges (less than 1.5mm) in all pulse sequence in both the analysis of fiducial marker in stereotactic G-frame and the phantom study. The coronal plane images had unacceptable large errors (more than 1.5mm) in the analysis of fiducial marker in the stereotactic G-frame, but had corrected small errors (less than 1.5mm) in the phantom study. CONCLUSION: We find from the phantom study that the present MR machines are adequate for stereotactic surgery system in frequently used pulse sequences, and imaging planes.
