Matches in SemOpenAlex for { <https://semopenalex.org/work/W995386427> ?p ?o ?g. }
Showing items 1 to 72 of
72
with 100 items per page.
- W995386427 endingPage "3515" @default.
- W995386427 startingPage "3515" @default.
- W995386427 abstract "Purpose: A technique using a scintillator-mirror-camera system to measure MLC leakage was developed to provide an efficient alternative to film dosimetry while maintaining high spatial resolution. This work describes the technique together with measurement uncertainties. Methods: Leakage measurements were made for the InCise™ MLC using the Logos XRV-2020A device. For each measurement approximately 170 leakage and background images were acquired using optimized camera settings. Average background was subtracted from each leakage frame before filtering the integrated leakage image to replace anomalous pixels. Pixel value to dose conversion was performed using a calibration image. Mean leakage was calculated within an ROI corresponding to the primary beam, and maximum leakage was determined by binning the image into overlapping 1mm × 1mm ROIs. 48 measurements were performed using 3 cameras and multiple MLC-linac combinations in varying beam orientations, with each compared to film dosimetry. Optical and environmental influences were also investigated. Results: Measurement time with the XRV-2020A was 8 minutes vs. 50 minutes using radiochromic film, and results were available immediately. Camera radiation exposure degraded measurement accuracy. With a relatively undamaged camera, mean leakage agreed with film measurement to ≤0.02% in 92% cases, ≤0.03% in 100% (for maximum leakage the values were 88% and 96%) relative to reference open field dose. The estimated camera lifetime over which this agreement is maintained is at least 150 measurements, and can be monitored using reference field exposures. A dependency on camera temperature was identified and a reduction in sensitivity with distance from image center due to optical distortion was characterized. Conclusion: With periodic monitoring of the degree of camera radiation damage, the XRV-2020A system can be used to measure MLC leakage. This represents a significant time saving when compared to the traditional film-based approach without any substantial reduction in accuracy." @default.
- W995386427 created "2016-06-24" @default.
- W995386427 creator A5009419821 @default.
- W995386427 creator A5011896466 @default.
- W995386427 creator A5031853660 @default.
- W995386427 creator A5033938574 @default.
- W995386427 date "2015-06-01" @default.
- W995386427 modified "2023-10-03" @default.
- W995386427 title "SU-E-T-774: Use of a Scintillator-Mirror-Camera System for the Measurement of MLC Leakage Radiation with the CyberKnife M6 System" @default.
- W995386427 doi "https://doi.org/10.1118/1.4925138" @default.
- W995386427 hasPublicationYear "2015" @default.
- W995386427 type Work @default.
- W995386427 sameAs 995386427 @default.
- W995386427 citedByCount "0" @default.
- W995386427 crossrefType "journal-article" @default.
- W995386427 hasAuthorship W995386427A5009419821 @default.
- W995386427 hasAuthorship W995386427A5011896466 @default.
- W995386427 hasAuthorship W995386427A5031853660 @default.
- W995386427 hasAuthorship W995386427A5033938574 @default.
- W995386427 hasConcept C120665830 @default.
- W995386427 hasConcept C121332964 @default.
- W995386427 hasConcept C139719470 @default.
- W995386427 hasConcept C160633673 @default.
- W995386427 hasConcept C161694136 @default.
- W995386427 hasConcept C162324750 @default.
- W995386427 hasConcept C165838908 @default.
- W995386427 hasConcept C192562407 @default.
- W995386427 hasConcept C205372480 @default.
- W995386427 hasConcept C2777042071 @default.
- W995386427 hasConcept C2989005 @default.
- W995386427 hasConcept C62520636 @default.
- W995386427 hasConcept C71924100 @default.
- W995386427 hasConcept C75088862 @default.
- W995386427 hasConcept C76935873 @default.
- W995386427 hasConcept C94915269 @default.
- W995386427 hasConceptScore W995386427C120665830 @default.
- W995386427 hasConceptScore W995386427C121332964 @default.
- W995386427 hasConceptScore W995386427C139719470 @default.
- W995386427 hasConceptScore W995386427C160633673 @default.
- W995386427 hasConceptScore W995386427C161694136 @default.
- W995386427 hasConceptScore W995386427C162324750 @default.
- W995386427 hasConceptScore W995386427C165838908 @default.
- W995386427 hasConceptScore W995386427C192562407 @default.
- W995386427 hasConceptScore W995386427C205372480 @default.
- W995386427 hasConceptScore W995386427C2777042071 @default.
- W995386427 hasConceptScore W995386427C2989005 @default.
- W995386427 hasConceptScore W995386427C62520636 @default.
- W995386427 hasConceptScore W995386427C71924100 @default.
- W995386427 hasConceptScore W995386427C75088862 @default.
- W995386427 hasConceptScore W995386427C76935873 @default.
- W995386427 hasConceptScore W995386427C94915269 @default.
- W995386427 hasIssue "6Part24" @default.
- W995386427 hasLocation W9953864271 @default.
- W995386427 hasOpenAccess W995386427 @default.
- W995386427 hasPrimaryLocation W9953864271 @default.
- W995386427 hasRelatedWork W1838393134 @default.
- W995386427 hasRelatedWork W1937723935 @default.
- W995386427 hasRelatedWork W1996730325 @default.
- W995386427 hasRelatedWork W2025213498 @default.
- W995386427 hasRelatedWork W2092014763 @default.
- W995386427 hasRelatedWork W2116644198 @default.
- W995386427 hasRelatedWork W2123351969 @default.
- W995386427 hasRelatedWork W2139783875 @default.
- W995386427 hasRelatedWork W2890025936 @default.
- W995386427 hasRelatedWork W1873415836 @default.
- W995386427 hasVolume "42" @default.
- W995386427 isParatext "false" @default.
- W995386427 isRetracted "false" @default.
- W995386427 magId "995386427" @default.
- W995386427 workType "article" @default.