Document Detail

A diagnostic X ray field verification device for a 10 MV linear accelerator.
MedLine Citation:
PMID:  3918974     Owner:  NLM     Status:  MEDLINE    
The quality of portal films taken at megavoltage energies is frequently poor, despite the use of various techniques such as lead screens to improve the image. When critical structures, such as the spinal cord, are to be blocked out of the treatment field, it is frequently difficult to determine whether the block is correctly placed. To solve this problem, a diagnostic X ray source has been mounted on the side of a 10 MV linear accelerator to provide accurate verification of patient positioning and location of shielding blocks. The coincidence between the mechanical, 10 MV and diagnostic X ray isocenters is about 1 mm. The system has been designed so that procedures to monitor this coincidence, and adjustment procedures to maintain it, are easily performed.
P J Biggs; M Goitein; M D Russell
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  International journal of radiation oncology, biology, physics     Volume:  11     ISSN:  0360-3016     ISO Abbreviation:  Int. J. Radiat. Oncol. Biol. Phys.     Publication Date:  1985 Mar 
Date Detail:
Created Date:  1985-04-10     Completed Date:  1985-04-10     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  7603616     Medline TA:  Int J Radiat Oncol Biol Phys     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  635-43     Citation Subset:  IM    
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MeSH Terms
Neoplasms / radiotherapy
Particle Accelerators*
Patient Care Planning / methods*
Radiotherapy, High-Energy / instrumentation*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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