Document Detail

Dosimetric characteristics of Thermo-Shield material for orthovoltage photon beams.
MedLine Citation:
PMID:  12852521     Owner:  NLM     Status:  MEDLINE    
Conventionally, lead has been used for field shaping in orthovoltage radiation therapy. Recently, a compensator material named Thermo-Shield was presented for field shaping in electron beams. Thermo-Shield is composed of nontoxic, high atomic weight metal particles dispersed in a thermoplastic matrix. It is manually moldable and conforms to human anatomy or any shape at temperatures of 108-132 degrees F. It is reusable and can be continuously reshaped to better fit the treatment field. Dosimetric characteristics of thermoplastic material were studied for Philips RT250 orthovoltage photon beams ranging from 75 to 250 kVp. It was found that Thermo-Shield should be four to five times thicker than lead to achieve the same transmission (less than 5%). However, it did not cause significant degradation in penumbra. Clinical procedures for use are discussed.
Mohammad Bahmaid; Siyong Kim; Chihray R Liu; Jatinder R Palta
Publication Detail:
Type:  Evaluation Studies; Journal Article    
Journal Detail:
Title:  Medical physics     Volume:  30     ISSN:  0094-2405     ISO Abbreviation:  Med Phys     Publication Date:  2003 Jun 
Date Detail:
Created Date:  2003-07-10     Completed Date:  2004-03-25     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0425746     Medline TA:  Med Phys     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1000-3     Citation Subset:  IM    
Department of Nuclear and Radiological Engineering, University of Florida, Gainesville, Florida 32610-0385, USA.
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MeSH Terms
Equipment Design
Equipment Failure Analysis / methods*
Materials Testing*
Photons / therapeutic use*
Physician's Practice Patterns
Radiation Dosage
Radiation Protection / instrumentation*,  methods*
Radiometry / methods*
Radiotherapy / instrumentation*,  methods*
Scattering, Radiation

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

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