Document Detail


Modifications based on computed tomographic imaging in planning the radiosurgical treatment of arteriovenous malformations.
MedLine Citation:
PMID:  8232797     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Early in the course of treating arteriovenous malformations with radiosurgery, it was noted that the nidus isocenter and diameter, as identified by stereotactic angiography, often differed from that identified by stereotactic enhanced computed tomography (CT). To assess the sources of discrepancy between the arteriographic and CT representations of the nidus, dosimetry (from treatment records stored on an optical disk) was reviewed in 81 consecutive cases. In 44 cases, the isocenters differed by an average of 3.6 mm and the collimator size differed. Fourteen nidi were larger on CT (average, 2.6 mm), and 30 were smaller on CT (average, 4.0 mm). Overall, the angiographic and the CT nidus differed in 75% of the cases reviewed. Sources of error in the angiographic nidus determination included overlapping vessels, bony structures, fine filamentous arterioles, and irregular shapes.
Authors:
D R Blatt; W A Friedman; F J Bova
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Neurosurgery     Volume:  33     ISSN:  0148-396X     ISO Abbreviation:  Neurosurgery     Publication Date:  1993 Oct 
Date Detail:
Created Date:  1993-12-17     Completed Date:  1993-12-17     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  7802914     Medline TA:  Neurosurgery     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  588-95; discussion 595-6     Citation Subset:  IM    
Affiliation:
Department of Neurological Surgery, University of Florida College of Medicine, Gainesville.
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MeSH Terms
Descriptor/Qualifier:
Angiography, Digital Subtraction
Artifacts
Cerebral Angiography
Humans
Intracranial Arteriovenous Malformations / radiography,  surgery*
Radiosurgery / methods*
Radiotherapy Planning, Computer-Assisted
Stereotaxic Techniques*
Tomography, X-Ray Computed / methods*

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