Matches in SemOpenAlex for { <https://semopenalex.org/work/W2043296023> ?p ?o ?g. }
Showing items 1 to 70 of
70
with 100 items per page.
- W2043296023 endingPage "3442" @default.
- W2043296023 startingPage "3442" @default.
- W2043296023 abstract "Purpose: X-ray scatter limits image quality in cone-beam CT (CBCT), resulting in shading/cupping and skin-line artifacts, lack of CT number accuracy and reduction in contrast-to-noise ratio. In this manuscript, seven metrics of image performance are defined and used to quantify the influence of x-ray scatter on image quality in a commercial kV CBCT unit used in image-guided radiation therapy. The dependence on axial FOVz (SI), bowtie compensation, and object shape are examined. The results provide a quantitative framework for assessing physical and computational methods of improving CBCT image quality. Method: Catphan-600 with and without NEMA-shaped jacket was imaged at five different FOVz (2–27 cm, SI) to examine the scatter influence on a CBCT equipped radiotherapy unit. CBCT images were acquired with and without the bowtie filter and all scatter corrections were disabled. Seven metrics were examined: (i) mshading, (ii) mskinline, (iii) mlag, (iv) mnoise, (v) mCNR, (vi) mCT#, and (vii) mlinearity. These were quantitatively analyzed using Matlab-2008. Results: Increasing the FOVz from 2 to 27 cm significantly reduces image quality in all 7 metrics, mshading exceeded 30%; mskinline (10 mm depth) was increased from 15 to 26% (without bowtie) and was more stable (−5.9% and 6.5%) with the use of the bowtie. mlag was 10.5% and mCNR was reduced by a factor of ∼2 between 2 and 27 cm FOVz. CT numbers (mCT#) improved in accuracy as FOV was decreased. Conclusion: Quantitative evaluation in phantoms demonstrates significant artifacts with increasing FOV. Bowtie study's led to reduction in shading/cupping and skin-line, as well as improvement in CNR and CT number accuracy. These improvements will lead to benefits in detection low contrast accuracy, and support initiatives in online and adaptive radiotherapy. Cone-beam CT can be applied for adaptive planning with improved image quality using proper scatter correction." @default.
- W2043296023 created "2016-06-24" @default.
- W2043296023 creator A5008048551 @default.
- W2043296023 creator A5033876247 @default.
- W2043296023 creator A5091342210 @default.
- W2043296023 date "2010-06-01" @default.
- W2043296023 modified "2023-09-25" @default.
- W2043296023 title "WE-E-201B-04: Parameterization of Scatter Dependent Artifacts in Cone-Beam CT" @default.
- W2043296023 doi "https://doi.org/10.1118/1.3469450" @default.
- W2043296023 hasPublicationYear "2010" @default.
- W2043296023 type Work @default.
- W2043296023 sameAs 2043296023 @default.
- W2043296023 citedByCount "0" @default.
- W2043296023 crossrefType "journal-article" @default.
- W2043296023 hasAuthorship W2043296023A5008048551 @default.
- W2043296023 hasAuthorship W2043296023A5033876247 @default.
- W2043296023 hasAuthorship W2043296023A5091342210 @default.
- W2043296023 hasConcept C104293457 @default.
- W2043296023 hasConcept C115961682 @default.
- W2043296023 hasConcept C120665830 @default.
- W2043296023 hasConcept C121332964 @default.
- W2043296023 hasConcept C126838900 @default.
- W2043296023 hasConcept C154945302 @default.
- W2043296023 hasConcept C2776502983 @default.
- W2043296023 hasConcept C2779813781 @default.
- W2043296023 hasConcept C2989005 @default.
- W2043296023 hasConcept C3018399558 @default.
- W2043296023 hasConcept C31601959 @default.
- W2043296023 hasConcept C41008148 @default.
- W2043296023 hasConcept C544519230 @default.
- W2043296023 hasConcept C55020928 @default.
- W2043296023 hasConcept C71924100 @default.
- W2043296023 hasConcept C9267231 @default.
- W2043296023 hasConceptScore W2043296023C104293457 @default.
- W2043296023 hasConceptScore W2043296023C115961682 @default.
- W2043296023 hasConceptScore W2043296023C120665830 @default.
- W2043296023 hasConceptScore W2043296023C121332964 @default.
- W2043296023 hasConceptScore W2043296023C126838900 @default.
- W2043296023 hasConceptScore W2043296023C154945302 @default.
- W2043296023 hasConceptScore W2043296023C2776502983 @default.
- W2043296023 hasConceptScore W2043296023C2779813781 @default.
- W2043296023 hasConceptScore W2043296023C2989005 @default.
- W2043296023 hasConceptScore W2043296023C3018399558 @default.
- W2043296023 hasConceptScore W2043296023C31601959 @default.
- W2043296023 hasConceptScore W2043296023C41008148 @default.
- W2043296023 hasConceptScore W2043296023C544519230 @default.
- W2043296023 hasConceptScore W2043296023C55020928 @default.
- W2043296023 hasConceptScore W2043296023C71924100 @default.
- W2043296023 hasConceptScore W2043296023C9267231 @default.
- W2043296023 hasIssue "6Part7" @default.
- W2043296023 hasLocation W20432960231 @default.
- W2043296023 hasOpenAccess W2043296023 @default.
- W2043296023 hasPrimaryLocation W20432960231 @default.
- W2043296023 hasRelatedWork W1642012722 @default.
- W2043296023 hasRelatedWork W1981775095 @default.
- W2043296023 hasRelatedWork W1982789351 @default.
- W2043296023 hasRelatedWork W2005805259 @default.
- W2043296023 hasRelatedWork W2025656351 @default.
- W2043296023 hasRelatedWork W2077265495 @default.
- W2043296023 hasRelatedWork W2151127213 @default.
- W2043296023 hasRelatedWork W2152251929 @default.
- W2043296023 hasRelatedWork W2152733288 @default.
- W2043296023 hasRelatedWork W4200554721 @default.
- W2043296023 hasVolume "37" @default.
- W2043296023 isParatext "false" @default.
- W2043296023 isRetracted "false" @default.
- W2043296023 magId "2043296023" @default.
- W2043296023 workType "article" @default.