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Spatial Distortion Due to Field Inhomogeneity in 3.0 Tesla Intraoperative MRI
- Source :
- The Neuroradiology Journal. 27:387-392
- Publication Year :
- 2014
- Publisher :
- SAGE Publications, 2014.
-
Abstract
- We describe a 14-year-old boy with a pilocytic astrocytoma of the left caudate head. Preoperative localization MR imaging (MRI) was performed in the operating room, and spatial distortion was noted felt to be related to head positioning relative to the isocenter of the magnetic field. The distortion artifact was subtle enough to be difficult to detect, but large enough to change the location of the lesion potentially leading to a non-diagnostic stereotactic biopsy. Repeat imaging after changing the head position to allow scanning closer to the isocenter of the magnetic field showed decreased distortion, an improvement greater than that using the manufacturer's distortion correction algorithm on the initial images. Intraoperative MRI, and its requisite limitations in positioning, requires vigilance to detect possible distortion that could alter surgical outcomes if not identified and corrected prospectively.
- Subjects :
- Image-Guided Biopsy
Male
medicine.medical_specialty
Stereotactic biopsy
Adolescent
Brain tumor
Astrocytoma
Intraoperative MRI
Humans
Medicine
Radiology, Nuclear Medicine and imaging
Intraoperative Care
medicine.diagnostic_test
Pilocytic astrocytoma
Brain Neoplasms
business.industry
Isocenter
Magnetic resonance imaging
Original Articles
General Medicine
medicine.disease
Magnetic Resonance Imaging
Head position
Neurology (clinical)
Radiology
Artifacts
Spatial distortion
business
Algorithms
Subjects
Details
- ISSN :
- 23851996 and 19714009
- Volume :
- 27
- Database :
- OpenAIRE
- Journal :
- The Neuroradiology Journal
- Accession number :
- edsair.doi.dedup.....783e7f246294806066eecf632fb07d4b
- Full Text :
- https://doi.org/10.15274/nrj-2014-10081