Document Detail

Direct reading measurement of absorbed dose with plastic scintillators--the general concept and applications to ophthalmic plaque dosimetry.
MedLine Citation:
PMID:  8815386     Owner:  NLM     Status:  MEDLINE    
We have developed dosemeters based on plastic scintillators for a variety of applications in radiation therapy. The dosemeters consist basically of a tissue-substituting scintillator probe, an optical fiber light guide, and a photomultiplier tube. The background light generated in the light guide can be compensated by a simultaneous measurement of the light from a blind fiber. Plastic scintillator dosemeters combine several advantageous properties which render them superior to other dosemeter types for many applications: minimal disturbance of the radiation field because of the homogeneous detector volume and the approximate water equivalence; no dependence on temperature and pressure (under standard clinical conditions) and angle of radiation incidence; no high voltage in the probe; high spatial resolution due to small detector volumes; direct reading of absorbed doses; and a large dynamical range. The high spatial resolution together with direct reading make these detectors suitable for real-time 3-D dosimetry using multi-channel detector systems. Such a system has been developed for eye plaque dosimetry and successfully employed for dosimetric treatment optimization. The plaque optimization can be performed by dosimetric measurements for the individual patient ("dosimetric treatment planning"). The time consumption for this procedure is less than for a physically correct computer-based therapy planning, e.g., by means of a Monte Carlo simulation.
D Flühs; M Heintz; F Indenkämpen; C Wieczorek
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Medical physics     Volume:  23     ISSN:  0094-2405     ISO Abbreviation:  Med Phys     Publication Date:  1996 Mar 
Date Detail:
Created Date:  1996-10-08     Completed Date:  1996-10-08     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0425746     Medline TA:  Med Phys     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  427-304     Citation Subset:  IM    
Klinische Strahlenphysik, Strahlentherapie, Universitätsklinikum Essen, Germany.
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MeSH Terms
Biophysical Phenomena
Brachytherapy / methods*,  statistics & numerical data
Evaluation Studies as Topic
Eye Neoplasms / radiotherapy*
Radiometry / instrumentation*,  methods,  statistics & numerical data
Radiotherapy Dosage
Radiotherapy Planning, Computer-Assisted / methods*,  statistics & numerical data
Scintillation Counting / instrumentation*,  statistics & numerical data
Technology, Radiologic

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

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