Matches in SemOpenAlex for { <https://semopenalex.org/work/W2020774554> ?p ?o ?g. }
Showing items 1 to 96 of
96
with 100 items per page.
- W2020774554 endingPage "2616" @default.
- W2020774554 startingPage "2616" @default.
- W2020774554 abstract "Purpose: To investigate the effect of tissue segmentation and metal streaking artifacts for Monte Carlo (MC) dose calculations in proton therapy. Method and Materials: CT images of a phantom with 9 tissue equivalent inserts were segmented into material and mass density maps using the conventional single-energy CT and a more accurate dual-energy (DECT) material extraction. MC dose calculations for a broad 200 MeV proton beam were performed in the exact geometry and in the single-energy and dual-energy CT geometries in the MCNPX code. The dose calculation errors for the two tissue segmentation approaches were quantified. MC dose calculations were performed for a 147 MeV proton beam treatment plan of a patient with metal bilateral hip prostheses based on water-only geometry, on original CT images with severe streaking artifacts and based on artifact corrected images. The effect of the artifacts and their correction on MC dose distribution was evaluated. Results: The materials of three inserts were incorrectly assigned using the conventional approach. The conventional tissue segmentation yielded dose calculation errors below 2%. In both the single-energy CT and DECT geometry, there was a 0.7 cm shift in the position of the Bragg peak suggesting that density assignment is more important than correct tissue segmentation in proton beam MC dose calculations. The patient dose calculations using CT images with streaking artifacts showed large statistical errors in the artifact corrupted voxels and differences up to 1.5 cm in the 20% and 30% isodose lines due to the artifacts. Conclusions: The shift in the Bragg peak demonstrates the need for careful mass density assignment in proton beam MC dose calculations. The use of DECT tissue segmentation might therefore have only a small added benefit. The patient study shows that a metal artifact correction is necessary for patients with bilateral hip prostheses." @default.
- W2020774554 created "2016-06-24" @default.
- W2020774554 creator A5029114354 @default.
- W2020774554 creator A5049072127 @default.
- W2020774554 creator A5060609022 @default.
- W2020774554 creator A5063945256 @default.
- W2020774554 date "2009-06-01" @default.
- W2020774554 modified "2023-10-18" @default.
- W2020774554 title "SU-FF-T-408: Tissue Inhomogeneities in Monte Carlo Treatment Planning for Proton Therapy" @default.
- W2020774554 doi "https://doi.org/10.1118/1.3181890" @default.
- W2020774554 hasPublicationYear "2009" @default.
- W2020774554 type Work @default.
- W2020774554 sameAs 2020774554 @default.
- W2020774554 citedByCount "2" @default.
- W2020774554 countsByYear W20207745542014 @default.
- W2020774554 countsByYear W20207745542016 @default.
- W2020774554 crossrefType "journal-article" @default.
- W2020774554 hasAuthorship W2020774554A5029114354 @default.
- W2020774554 hasAuthorship W2020774554A5049072127 @default.
- W2020774554 hasAuthorship W2020774554A5060609022 @default.
- W2020774554 hasAuthorship W2020774554A5063945256 @default.
- W2020774554 hasConcept C104293457 @default.
- W2020774554 hasConcept C105795698 @default.
- W2020774554 hasConcept C120665830 @default.
- W2020774554 hasConcept C121332964 @default.
- W2020774554 hasConcept C126838900 @default.
- W2020774554 hasConcept C136229726 @default.
- W2020774554 hasConcept C154945302 @default.
- W2020774554 hasConcept C168834538 @default.
- W2020774554 hasConcept C185544564 @default.
- W2020774554 hasConcept C186370098 @default.
- W2020774554 hasConcept C187954543 @default.
- W2020774554 hasConcept C192562407 @default.
- W2020774554 hasConcept C19499675 @default.
- W2020774554 hasConcept C201645570 @default.
- W2020774554 hasConcept C2779010991 @default.
- W2020774554 hasConcept C2779244869 @default.
- W2020774554 hasConcept C2989005 @default.
- W2020774554 hasConcept C33600429 @default.
- W2020774554 hasConcept C33923547 @default.
- W2020774554 hasConcept C41008148 @default.
- W2020774554 hasConcept C509974204 @default.
- W2020774554 hasConcept C54170458 @default.
- W2020774554 hasConcept C544519230 @default.
- W2020774554 hasConcept C54516573 @default.
- W2020774554 hasConcept C62520636 @default.
- W2020774554 hasConcept C71924100 @default.
- W2020774554 hasConcept C89600930 @default.
- W2020774554 hasConceptScore W2020774554C104293457 @default.
- W2020774554 hasConceptScore W2020774554C105795698 @default.
- W2020774554 hasConceptScore W2020774554C120665830 @default.
- W2020774554 hasConceptScore W2020774554C121332964 @default.
- W2020774554 hasConceptScore W2020774554C126838900 @default.
- W2020774554 hasConceptScore W2020774554C136229726 @default.
- W2020774554 hasConceptScore W2020774554C154945302 @default.
- W2020774554 hasConceptScore W2020774554C168834538 @default.
- W2020774554 hasConceptScore W2020774554C185544564 @default.
- W2020774554 hasConceptScore W2020774554C186370098 @default.
- W2020774554 hasConceptScore W2020774554C187954543 @default.
- W2020774554 hasConceptScore W2020774554C192562407 @default.
- W2020774554 hasConceptScore W2020774554C19499675 @default.
- W2020774554 hasConceptScore W2020774554C201645570 @default.
- W2020774554 hasConceptScore W2020774554C2779010991 @default.
- W2020774554 hasConceptScore W2020774554C2779244869 @default.
- W2020774554 hasConceptScore W2020774554C2989005 @default.
- W2020774554 hasConceptScore W2020774554C33600429 @default.
- W2020774554 hasConceptScore W2020774554C33923547 @default.
- W2020774554 hasConceptScore W2020774554C41008148 @default.
- W2020774554 hasConceptScore W2020774554C509974204 @default.
- W2020774554 hasConceptScore W2020774554C54170458 @default.
- W2020774554 hasConceptScore W2020774554C544519230 @default.
- W2020774554 hasConceptScore W2020774554C54516573 @default.
- W2020774554 hasConceptScore W2020774554C62520636 @default.
- W2020774554 hasConceptScore W2020774554C71924100 @default.
- W2020774554 hasConceptScore W2020774554C89600930 @default.
- W2020774554 hasIssue "6Part15" @default.
- W2020774554 hasLocation W20207745541 @default.
- W2020774554 hasOpenAccess W2020774554 @default.
- W2020774554 hasPrimaryLocation W20207745541 @default.
- W2020774554 hasRelatedWork W1972096864 @default.
- W2020774554 hasRelatedWork W1984141549 @default.
- W2020774554 hasRelatedWork W1998998837 @default.
- W2020774554 hasRelatedWork W2012175208 @default.
- W2020774554 hasRelatedWork W2061146121 @default.
- W2020774554 hasRelatedWork W2070158735 @default.
- W2020774554 hasRelatedWork W2098736080 @default.
- W2020774554 hasRelatedWork W2122763738 @default.
- W2020774554 hasRelatedWork W4313537251 @default.
- W2020774554 hasRelatedWork W982201012 @default.
- W2020774554 hasVolume "36" @default.
- W2020774554 isParatext "false" @default.
- W2020774554 isRetracted "false" @default.
- W2020774554 magId "2020774554" @default.
- W2020774554 workType "article" @default.