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Clinical experience with stereotactic digital subtraction angiography with distortion correction software
K Ericson1, M Söderman, E Maurincomme
1Department of Neuroradiology, Karolinska Hospital, Stockholm, Sweden.
Stereotactic and Functional Neurosurgery
|January 1, 1996
Summary
Newly developed software accurately corrects geometric distortion in digital subtraction angiography for precise intracranial arteriovenous malformation radiosurgery. This improves treatment planning and execution using Gamma Knife technology.
Area of Science:
- Neurosurgery
- Medical Imaging
- Radiosurgery
Background:
- Intracranial arteriovenous malformations (AVMs) require precise treatment.
- Geometric distortion in digital subtraction angiography (DSA) can affect treatment accuracy.
- Gamma Knife radiosurgery is a key treatment modality for AVMs.
Purpose of the Study:
- To clinically evaluate newly developed software for correcting geometric distortion in DSA.
- To assess the software's impact on the radiosurgical treatment of intracranial AVMs.
Main Methods:
- Sixty patients with intracranial AVMs underwent radiosurgery.
- Grid images were acquired during DSA to calibrate distortion.
- A pixel-by-pixel correction algorithm was applied to DSA images.
- Treatment planning and Gamma Knife radiosurgery were performed on corrected images.
Main Results:
- The software successfully corrected geometric distortion in DSA images.
- Accurate target localization and outlining were achieved on corrected images.
- Clinical applicability of the distortion correction program was demonstrated.
Conclusions:
- The developed software is clinically applicable for correcting DSA geometric distortion.
- This correction enhances precision in radiosurgical treatment planning for intracranial AVMs.
- Further software development aims to improve data management and reduce processing time.