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Use of MR angiography for stereotactic planning
H H Ehricke1, L R Schad, G Gademann
1MR Engineering Group, Siemens Medical Systems, Erlangen, Germany.
Journal of Computer Assisted Tomography
|January 1, 1992
Summary
Magnetic Resonance Angiography (MRA) offers a new method for planning stereotactic radiosurgery for arteriovenous malformations. This MRA-based approach integrates imaging and planning for improved accuracy in treating brain vascular conditions.
Area of Science:
- Medical Imaging
- Neurosurgery
- Radiology
Background:
- Magnetic Resonance Angiography (MRA) enables simultaneous imaging of flowing and stationary tissues.
- Stereotactic approaches carry risks of damaging intracerebral vessels and vital brain structures.
- Accurate pre-treatment planning is crucial for stereotactic radiosurgery.
Purpose of the Study:
- To present an MRA-based planning method for stereotactic radiosurgery of arteriovenous malformations.
- To evaluate the efficacy of MRA in stereotactic treatment planning.
- To compare MRA-guided planning with conventional X-ray angiography.
Main Methods:
- Utilized flow-compensated gradient echo pulse sequences for MRA data acquisition.
- Employed a stereotactic MR marker system and an algorithm for geometric distortion correction.
- Developed a 3D workstation for integrated display of MR slices and angiographic projections.
Main Results:
- The MRA-based planning method allows simultaneous evaluation of intracerebral vasculature and brain anatomy.
- Clinical study demonstrated satisfactory results when comparing MRA-guided planning to conventional X-ray angiography.
- MRA provides a comprehensive view for treatment planning.
Conclusions:
- MRA is a valuable tool for stereotactic planning in neurosurgery.
- The developed MRA-based method enhances the planning of stereotactic radiosurgery for arteriovenous malformations.
- MRA offers advantages for precise targeting and risk assessment in stereotactic procedures.