Matches in SemOpenAlex for { <https://semopenalex.org/work/W1972101667> ?p ?o ?g. }
Showing items 1 to 80 of
80
with 100 items per page.
- W1972101667 endingPage "457" @default.
- W1972101667 startingPage "457" @default.
- W1972101667 abstract "Purpose: High-quality four dimensional cone-beam CT (4D-CBCT) can be obtained by deforming the planning CT in radiotherapy, where the deformation vector fields (DVF) is estimated by matching the forward projection of the deformed planning CT and measured 4D-CBCT projections. Due to the presence of scatter signal in CBCT projection images, the accuracy of DVF estimation is degraded when the sum of squared intensity difference (SSID) is used as the matching criterion. The goal of this work is to improve the estimation accuracy of DVF by using normalized correlation coefficient (NCC) as the matching criterion to obtain high quality on-treatment 4D-CBCT of lung cancer patients in radiation therapy. Methods: The DVF used to deform the planning CT is estimated by maximizing the NCC between the projections of on-treatment 4D-CBCT and the forward projection of the deformed planning CT. A non-linear conjugate gradient (NLCG) algorithm was used for the optimization. To obtain better initial DVF for NLCG optimization, demons registration was first performed between planning CT and 4D-CBCT reconstructed by total variation (TV) minimization. A 4D NCAT phantom was used to quantitatively evaluate the performance of the algorithm, where the reconstruction error is calculated as the sum of squared difference between the reconstructed 4D-CBCT and the phantom image. Results: NCC based DVF estimation improves the image reconstruction accuracy as compared to the results obtained using SSID criterion. The image reconstruction error of 4D-CBCT obtained by NCC criterion is 61.5% smaller than that is obtained by SSID criterion. Conclusion: The accuracy DVF estimation and image reconstruction is substantially improved by using the NCC criterion, as compared to the results obtained by SSID criterion. High quality 4D-CBCT can be a valuable tool in image-guided radiation therapy for lung cancer patients. Cancer Prevention and Research Institute of Texas (RP110562)" @default.
- W1972101667 created "2016-06-24" @default.
- W1972101667 creator A5017282146 @default.
- W1972101667 creator A5037677450 @default.
- W1972101667 creator A5045355551 @default.
- W1972101667 creator A5059684522 @default.
- W1972101667 date "2013-06-01" @default.
- W1972101667 modified "2023-09-25" @default.
- W1972101667 title "TU-G-141-06: Deformation Vector Fields (DVF)-Driven Image Reconstruction for 4D-CBCT" @default.
- W1972101667 doi "https://doi.org/10.1118/1.4815466" @default.
- W1972101667 hasPublicationYear "2013" @default.
- W1972101667 type Work @default.
- W1972101667 sameAs 1972101667 @default.
- W1972101667 citedByCount "2" @default.
- W1972101667 countsByYear W19721016672014 @default.
- W1972101667 countsByYear W19721016672015 @default.
- W1972101667 crossrefType "journal-article" @default.
- W1972101667 hasAuthorship W1972101667A5017282146 @default.
- W1972101667 hasAuthorship W1972101667A5037677450 @default.
- W1972101667 hasAuthorship W1972101667A5045355551 @default.
- W1972101667 hasAuthorship W1972101667A5059684522 @default.
- W1972101667 hasConcept C104293457 @default.
- W1972101667 hasConcept C105795698 @default.
- W1972101667 hasConcept C11413529 @default.
- W1972101667 hasConcept C115961682 @default.
- W1972101667 hasConcept C126838900 @default.
- W1972101667 hasConcept C141379421 @default.
- W1972101667 hasConcept C154945302 @default.
- W1972101667 hasConcept C165064840 @default.
- W1972101667 hasConcept C2779813781 @default.
- W1972101667 hasConcept C2989005 @default.
- W1972101667 hasConcept C31601959 @default.
- W1972101667 hasConcept C31972630 @default.
- W1972101667 hasConcept C33923547 @default.
- W1972101667 hasConcept C41008148 @default.
- W1972101667 hasConcept C544519230 @default.
- W1972101667 hasConcept C55020928 @default.
- W1972101667 hasConcept C57493831 @default.
- W1972101667 hasConcept C71924100 @default.
- W1972101667 hasConcept C9267231 @default.
- W1972101667 hasConceptScore W1972101667C104293457 @default.
- W1972101667 hasConceptScore W1972101667C105795698 @default.
- W1972101667 hasConceptScore W1972101667C11413529 @default.
- W1972101667 hasConceptScore W1972101667C115961682 @default.
- W1972101667 hasConceptScore W1972101667C126838900 @default.
- W1972101667 hasConceptScore W1972101667C141379421 @default.
- W1972101667 hasConceptScore W1972101667C154945302 @default.
- W1972101667 hasConceptScore W1972101667C165064840 @default.
- W1972101667 hasConceptScore W1972101667C2779813781 @default.
- W1972101667 hasConceptScore W1972101667C2989005 @default.
- W1972101667 hasConceptScore W1972101667C31601959 @default.
- W1972101667 hasConceptScore W1972101667C31972630 @default.
- W1972101667 hasConceptScore W1972101667C33923547 @default.
- W1972101667 hasConceptScore W1972101667C41008148 @default.
- W1972101667 hasConceptScore W1972101667C544519230 @default.
- W1972101667 hasConceptScore W1972101667C55020928 @default.
- W1972101667 hasConceptScore W1972101667C57493831 @default.
- W1972101667 hasConceptScore W1972101667C71924100 @default.
- W1972101667 hasConceptScore W1972101667C9267231 @default.
- W1972101667 hasIssue "6Part27" @default.
- W1972101667 hasLocation W19721016671 @default.
- W1972101667 hasOpenAccess W1972101667 @default.
- W1972101667 hasPrimaryLocation W19721016671 @default.
- W1972101667 hasRelatedWork W1976419675 @default.
- W1972101667 hasRelatedWork W2011797925 @default.
- W1972101667 hasRelatedWork W2025656351 @default.
- W1972101667 hasRelatedWork W2032426147 @default.
- W1972101667 hasRelatedWork W2032917719 @default.
- W1972101667 hasRelatedWork W2034905155 @default.
- W1972101667 hasRelatedWork W2037419104 @default.
- W1972101667 hasRelatedWork W2046556180 @default.
- W1972101667 hasRelatedWork W2986633037 @default.
- W1972101667 hasRelatedWork W4293427772 @default.
- W1972101667 hasVolume "40" @default.
- W1972101667 isParatext "false" @default.
- W1972101667 isRetracted "false" @default.
- W1972101667 magId "1972101667" @default.
- W1972101667 workType "article" @default.