Matches in SemOpenAlex for { <https://semopenalex.org/work/W2045334105> ?p ?o ?g. }
Showing items 1 to 68 of
68
with 100 items per page.
- W2045334105 endingPage "469" @default.
- W2045334105 startingPage "469" @default.
- W2045334105 abstract "Purpose: Small‐field dosimetry is challenging due to charged‐particle disequilibrium, source occlusion and more importantly finite size of detectors. IAEA/AAPM has published approach to convert detector readings to dose by k factor. Manufacturers have been trying to provide various types of micro‐detectors that could be used in small fields. However k factors depends on detector perturbations and are derived using Monte Carlo simulation. PTW has introduced a microDiamond for small‐field dosimetry. An experimental approach is presented to derive the k factor for this detector. Methods: PTW microDiamond is a small volume detector with 1.1 mm radius and 1.0 micron thick synthetic diamond. Output factors were measured from 1×1cm2 to 12×12 cm2 on a Varian machine at various depths using various micro‐detectors with published k factors. Dose is calculated as reading * K. Assuming k factor is accurate, output factor should be identical with every micro‐detectors. Hence published k values (Francescon et al Med Phys 35, 504‐513,2008) were used to covert readings and then output factors were computed. Based on the converged curve from other detectors, k factor for microDiamond was computed versus field size. Results: Traditional output factors as ratio of readings normalized to 10×10 cm2 differ significantly for micro‐detectors for fields smaller than 3×3 cm2 which are now being used extensively. When readings are converted to dose, the output factor is independent of detector. Based on this method, k factor for microDiamond was estimated to be nearly constant 0.993±0.007 over varied field sizes. Conclusion: Our method provides a unique opportunity to determine the k factor for any unknown detector. It is shown that even though k factor depends on machine type due to focal spot, however for fields ≥1×1 cm2 this method provides accurate evaluation of k factor. Additionally microDiamond could be used with assumption that k factor is nearly unity." @default.
- W2045334105 created "2016-06-24" @default.
- W2045334105 creator A5026876611 @default.
- W2045334105 creator A5070721855 @default.
- W2045334105 creator A5084361495 @default.
- W2045334105 date "2014-05-29" @default.
- W2045334105 modified "2023-10-05" @default.
- W2045334105 title "TU-F-BRE-05: Experimental Determination of K Factor in Small Field Dosimetry" @default.
- W2045334105 doi "https://doi.org/10.1118/1.4889313" @default.
- W2045334105 hasPublicationYear "2014" @default.
- W2045334105 type Work @default.
- W2045334105 sameAs 2045334105 @default.
- W2045334105 citedByCount "3" @default.
- W2045334105 countsByYear W20453341052016 @default.
- W2045334105 countsByYear W20453341052020 @default.
- W2045334105 crossrefType "journal-article" @default.
- W2045334105 hasAuthorship W2045334105A5026876611 @default.
- W2045334105 hasAuthorship W2045334105A5070721855 @default.
- W2045334105 hasAuthorship W2045334105A5084361495 @default.
- W2045334105 hasConcept C105795698 @default.
- W2045334105 hasConcept C120665830 @default.
- W2045334105 hasConcept C121332964 @default.
- W2045334105 hasConcept C178635117 @default.
- W2045334105 hasConcept C19499675 @default.
- W2045334105 hasConcept C2989005 @default.
- W2045334105 hasConcept C3019527723 @default.
- W2045334105 hasConcept C30475298 @default.
- W2045334105 hasConcept C33923547 @default.
- W2045334105 hasConcept C38652104 @default.
- W2045334105 hasConcept C41008148 @default.
- W2045334105 hasConcept C71924100 @default.
- W2045334105 hasConcept C75088862 @default.
- W2045334105 hasConcept C94915269 @default.
- W2045334105 hasConceptScore W2045334105C105795698 @default.
- W2045334105 hasConceptScore W2045334105C120665830 @default.
- W2045334105 hasConceptScore W2045334105C121332964 @default.
- W2045334105 hasConceptScore W2045334105C178635117 @default.
- W2045334105 hasConceptScore W2045334105C19499675 @default.
- W2045334105 hasConceptScore W2045334105C2989005 @default.
- W2045334105 hasConceptScore W2045334105C3019527723 @default.
- W2045334105 hasConceptScore W2045334105C30475298 @default.
- W2045334105 hasConceptScore W2045334105C33923547 @default.
- W2045334105 hasConceptScore W2045334105C38652104 @default.
- W2045334105 hasConceptScore W2045334105C41008148 @default.
- W2045334105 hasConceptScore W2045334105C71924100 @default.
- W2045334105 hasConceptScore W2045334105C75088862 @default.
- W2045334105 hasConceptScore W2045334105C94915269 @default.
- W2045334105 hasIssue "6Part27" @default.
- W2045334105 hasLocation W20453341051 @default.
- W2045334105 hasOpenAccess W2045334105 @default.
- W2045334105 hasPrimaryLocation W20453341051 @default.
- W2045334105 hasRelatedWork W2014117109 @default.
- W2045334105 hasRelatedWork W2057069113 @default.
- W2045334105 hasRelatedWork W2065988904 @default.
- W2045334105 hasRelatedWork W2078932460 @default.
- W2045334105 hasRelatedWork W2085552297 @default.
- W2045334105 hasRelatedWork W2157245188 @default.
- W2045334105 hasRelatedWork W2355949941 @default.
- W2045334105 hasRelatedWork W2965085246 @default.
- W2045334105 hasRelatedWork W3109472879 @default.
- W2045334105 hasRelatedWork W953925414 @default.
- W2045334105 hasVolume "41" @default.
- W2045334105 isParatext "false" @default.
- W2045334105 isRetracted "false" @default.
- W2045334105 magId "2045334105" @default.
- W2045334105 workType "article" @default.