Evaluating stereotactic accuracy with patient-specific MRI distortion corrections for frame-based radiosurgery.
Document Type
Article
Publication Date
7-23-2024
Publication Title
Journal of applied clinical medical physics [electronic resource] / American College of Medical Physics
Abstract
PURPOSE: This study examines how MRI distortions affect frame-based SRS treatments and assesses the need for clinical distortion corrections.
METHODS: The study included 18 patients with 80 total brain targets treated using frame-based radiosurgery. Distortion within patients' MRIs were corrected using Cranial Distortion Correction (CDC) software, which utilizes the patient's CT to alter planning MRIs to reduce inherent intra-cranial distortion. Distortion was evaluated by comparing the original planning target volumes (PTV
RESULTS: PTV
CONCLUSION: MRIs used for SRS target delineation exhibit notable geometric distortions that may compromise optimal dosimetric accuracy. A uniform 1 mm expansion may result in geometric misses; however, the CDC algorithm provides a feasible solution for rectifying distortions, thereby enhancing treatment precision.
First Page
14472
Recommended Citation
Knill C, Halford R, Sandhu R, Loughery B, Shamim S, Junn F, et al [Lee K, Almahariq M, Seymour Z] Evaluating stereotactic accuracy with patient-specific MRI distortion corrections for frame-based radiosurgery. J Appl Clin Med Phys. 2024 Jul 23:e14472. doi: 10.1002/acm2.14472. PMID: 39042450.
DOI
10.1002/acm2.14472
ISSN
1526-9914
PubMed ID
39042450