J Korean Soc Magn Reson Med.  2000 Jun;4(1):7-13.

Assessment of Imaging Distortion in Magnetic Resonance Imaging for Stereotactic Radiosurgery: Through Phantom Study

• Park SW
• Han MH
• Kim DG
• Chung HT
• Song IC
• Kim HD
• Chang KH

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.

Keyword

distortion; MRI; stereotactic rediosurgery; stereotactic surgery; phantom study

MeSH Terms

Fiducial Markers
Humans
Magnetic Resonance Imaging*
Radiosurgery*