Document Detail

Frame stability and anatomical QA in radiosurgery.
MedLine Citation:
PMID:  21681639     Owner:  NLM     Status:  Publisher    
OBJECTIVES: The aim of the study was to analyze whether the fixation of the stereotactic frame is stable and whether the location of the treated target coincides with its anatomical location during Gamma Knife(®) surgery (GKS). MATERIALS AND METHODS: Stereotactic MR examinations using the same high-resolution MRI protocol were performed before and after GKS in 18 consecutive patients. The stereotactic (x,y,z) coordinates for three different anatomical landmarks were independently defined three times in each study for each landmark of the images taken before and after GKS by two of the authors, resulting in a total of 648 coordinate definitions. RESULTS: The uncertainty in the readings of the coordinates for the anatomical landmarks was of the same magnitude as the difference in the coordinates before and after GKS in all but one patient. The differences in this one case were due to MR distortion and not to repositioning of the frame. The difference in the coordinates before and after treatment was not affected by the removal of one of the frontal fixation screws in one of the patients. CONCLUSIONS: The stereotactic frame position is stable and does not move.
Bengt Karlsson; Andre Kalend; Roberto Martinez
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-6-18
Journal Detail:
Title:  Acta neurochirurgica     Volume:  -     ISSN:  0942-0940     ISO Abbreviation:  -     Publication Date:  2011 Jun 
Date Detail:
Created Date:  2011-6-17     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0151000     Medline TA:  Acta Neurochir (Wien)     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Division of Neurosurgery, National University Hospital, 5 Lower Kent Ridge Road, Singapore, Singapore, 119074,
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