Matches in SemOpenAlex for { <https://semopenalex.org/work/W2023245961> ?p ?o ?g. }
Showing items 1 to 84 of
84
with 100 items per page.
- W2023245961 abstract "Purpose: To investigate the application of the Scatter and Primary Estimation from Collimator Shadows (SPECS) scatter correction algorithm to EPID‐based megavoltage cone‐beam CTimaging, and to characterize the qualitative and quantitative effect of algorithm parameter choice on image correction. Method and Materials: A series of EPID projection images were acquired through 200 degree gantry rotation around a 15cm diameter quality assurance test phantom. Using the reconstructedCTimages of the sensitometry and uniformity inserts, five SPECS algorithm parameters were tested and the effects on cupping artifacts, contrast‐to‐noise ratio, root mean square error and CT number accuracy were determined. Nominal parameter combinations were then applied to anthropomorphic phantom reconstructions.Results: The algorithm parameter used to define the collimator edge was found to have the largest impact on image reconstruction quality in comparison to the other parameters studied. An investigation of approximately 800 parameter combinations yielded a nominal set of five parameters, which when applied to the reconstruction of the uniformity insert reduced the cupping artifact to less than one percent. Application of the nominal algorithm parameters to the sensitometry insert reconstruction produced improvements in reconstructedCT number in Teflon by 125%, acrylic by 100%, and low‐density polyethylene by 75%, with a slight improvement in the contrast‐to‐noise ratio of acrylic to water. In the anthropomorphic head phantom reconstruction, the average CT number of bone increased from 200 to 670, while the average CT number of soft tissue increased from −200 to −30. Conclusion: This work outlines the application of the SPECS algorithm as an option for scatter correction in EPID‐based megavoltage cone‐beam CTimaging. The algorithm was found to provide a reduction in cupping artifacts and improvement in CT number reconstruction using scatter information derived directly from projection data, without necessitating additional modeling of system and patient‐specific geometrical conditions." @default.
- W2023245961 created "2016-06-24" @default.
- W2023245961 creator A5047323541 @default.
- W2023245961 creator A5079050815 @default.
- W2023245961 date "2008-06-01" @default.
- W2023245961 modified "2023-09-27" @default.
- W2023245961 title "SU-GG-J-35: Application of a Direct Scatter Correction Algorithm to EPID-Based Megavoltage Cone-Beam CT" @default.
- W2023245961 doi "https://doi.org/10.1118/1.2961593" @default.
- W2023245961 hasPublicationYear "2008" @default.
- W2023245961 type Work @default.
- W2023245961 sameAs 2023245961 @default.
- W2023245961 citedByCount "0" @default.
- W2023245961 crossrefType "journal-article" @default.
- W2023245961 hasAuthorship W2023245961A5047323541 @default.
- W2023245961 hasAuthorship W2023245961A5079050815 @default.
- W2023245961 hasConcept C104293457 @default.
- W2023245961 hasConcept C106436119 @default.
- W2023245961 hasConcept C11413529 @default.
- W2023245961 hasConcept C115961682 @default.
- W2023245961 hasConcept C120665830 @default.
- W2023245961 hasConcept C121332964 @default.
- W2023245961 hasConcept C126838900 @default.
- W2023245961 hasConcept C141379421 @default.
- W2023245961 hasConcept C142724271 @default.
- W2023245961 hasConcept C154945302 @default.
- W2023245961 hasConcept C2778618615 @default.
- W2023245961 hasConcept C2779200277 @default.
- W2023245961 hasConcept C2779813781 @default.
- W2023245961 hasConcept C2989005 @default.
- W2023245961 hasConcept C33923547 @default.
- W2023245961 hasConcept C41008148 @default.
- W2023245961 hasConcept C544519230 @default.
- W2023245961 hasConcept C55020928 @default.
- W2023245961 hasConcept C57493831 @default.
- W2023245961 hasConcept C71924100 @default.
- W2023245961 hasConcept C99498987 @default.
- W2023245961 hasConceptScore W2023245961C104293457 @default.
- W2023245961 hasConceptScore W2023245961C106436119 @default.
- W2023245961 hasConceptScore W2023245961C11413529 @default.
- W2023245961 hasConceptScore W2023245961C115961682 @default.
- W2023245961 hasConceptScore W2023245961C120665830 @default.
- W2023245961 hasConceptScore W2023245961C121332964 @default.
- W2023245961 hasConceptScore W2023245961C126838900 @default.
- W2023245961 hasConceptScore W2023245961C141379421 @default.
- W2023245961 hasConceptScore W2023245961C142724271 @default.
- W2023245961 hasConceptScore W2023245961C154945302 @default.
- W2023245961 hasConceptScore W2023245961C2778618615 @default.
- W2023245961 hasConceptScore W2023245961C2779200277 @default.
- W2023245961 hasConceptScore W2023245961C2779813781 @default.
- W2023245961 hasConceptScore W2023245961C2989005 @default.
- W2023245961 hasConceptScore W2023245961C33923547 @default.
- W2023245961 hasConceptScore W2023245961C41008148 @default.
- W2023245961 hasConceptScore W2023245961C544519230 @default.
- W2023245961 hasConceptScore W2023245961C55020928 @default.
- W2023245961 hasConceptScore W2023245961C57493831 @default.
- W2023245961 hasConceptScore W2023245961C71924100 @default.
- W2023245961 hasConceptScore W2023245961C99498987 @default.
- W2023245961 hasLocation W20232459611 @default.
- W2023245961 hasOpenAccess W2023245961 @default.
- W2023245961 hasPrimaryLocation W20232459611 @default.
- W2023245961 hasRelatedWork W1604761457 @default.
- W2023245961 hasRelatedWork W1649407205 @default.
- W2023245961 hasRelatedWork W1963561736 @default.
- W2023245961 hasRelatedWork W1967098673 @default.
- W2023245961 hasRelatedWork W2001104419 @default.
- W2023245961 hasRelatedWork W2021885640 @default.
- W2023245961 hasRelatedWork W2029613468 @default.
- W2023245961 hasRelatedWork W2033082699 @default.
- W2023245961 hasRelatedWork W2039110160 @default.
- W2023245961 hasRelatedWork W2042946179 @default.
- W2023245961 hasRelatedWork W2054318521 @default.
- W2023245961 hasRelatedWork W2054641147 @default.
- W2023245961 hasRelatedWork W2062092603 @default.
- W2023245961 hasRelatedWork W2064125801 @default.
- W2023245961 hasRelatedWork W2068433686 @default.
- W2023245961 hasRelatedWork W2083742062 @default.
- W2023245961 hasRelatedWork W2085236124 @default.
- W2023245961 hasRelatedWork W2295937319 @default.
- W2023245961 hasRelatedWork W2793682772 @default.
- W2023245961 hasRelatedWork W2942825173 @default.
- W2023245961 isParatext "false" @default.
- W2023245961 isRetracted "false" @default.
- W2023245961 magId "2023245961" @default.
- W2023245961 workType "article" @default.