Matches in SemOpenAlex for { <https://semopenalex.org/work/W1987393485> ?p ?o ?g. }
Showing items 1 to 80 of
80
with 100 items per page.
- W1987393485 abstract "Purpose: To generate electron density (ED) maps and digitally reconstructed radiographs (DRRs) of the pelvis based only on magnetic resonance imaging (MRI). Methods: A conventional 3D fast‐field dual‐echo sequence was used to acquire image data of 8 healthy subjects with a Philips 3.0T Ingenia TX system in approximately 1:50 min scan time per volunteer. Dixon reconstruction of the nearly out‐of‐phase (echo 1) and in‐phase images (echo 2) allowed for water and fat classification. A bone‐enhanced image was generated by automatically thresholding the noise level of the in‐phase image with subsequent background removal. ED maps were then produced by assigning known bulk electron densities to the classified bone and tissue fractions. A bone probability atlas derived from CT data was registered to the ED map in order to filter out misclassified voxels. Finally, DRRs were reconstructed from bone‐enhanced images as well as from ED maps. Results: The proposed MRI sequence with subsequent Dixon reconstruction and probabilistic filtering makes it possible to classify cortical bone, soft tissue and adipose tissue in the pelvis and yields ED maps and corresponding DRRs. Bowel content was misclassified as cortical bone or air and compromised the segmentation in some slices as well as in the DRRs. Automatic probabilistic atlas filtering can significantly reduce artifacts induced by bowel content without affecting pelvic bone structures markedly. In total, the artifact/bone fraction dropped from 1.7 before filtering to 0.2 after filtering. The average reduction of artifact volume is 87%, and the average bone preservation is 99%. Remaining artifacts are spatially close to the true bone in areas of positive bone probability. Conclusion: This study demonstrated the feasibility of generating realistic ED maps of the pelvis by using MRI only. The method has the potential to become an essential component of emerging applications such as MR‐only‐based radiation therapy planning. All authors have the following relevant financial interest or relationship to disclose with regard to the subject matter of this presentation: Company name: Philips Research; Type of relationship: Employee" @default.
- W1987393485 created "2016-06-24" @default.
- W1987393485 creator A5024567525 @default.
- W1987393485 creator A5030993068 @default.
- W1987393485 creator A5047792556 @default.
- W1987393485 creator A5050533431 @default.
- W1987393485 creator A5058532911 @default.
- W1987393485 creator A5075308216 @default.
- W1987393485 creator A5087110409 @default.
- W1987393485 creator A5087400447 @default.
- W1987393485 date "2013-06-01" @default.
- W1987393485 modified "2023-09-28" @default.
- W1987393485 title "TU-G-134-03: MR-Only-Based Generation of Electron Density Maps and Digitally Reconstructed Radiographs of the Pelvis" @default.
- W1987393485 doi "https://doi.org/10.1118/1.4815481" @default.
- W1987393485 hasPublicationYear "2013" @default.
- W1987393485 type Work @default.
- W1987393485 sameAs 1987393485 @default.
- W1987393485 citedByCount "0" @default.
- W1987393485 crossrefType "journal-article" @default.
- W1987393485 hasAuthorship W1987393485A5024567525 @default.
- W1987393485 hasAuthorship W1987393485A5030993068 @default.
- W1987393485 hasAuthorship W1987393485A5047792556 @default.
- W1987393485 hasAuthorship W1987393485A5050533431 @default.
- W1987393485 hasAuthorship W1987393485A5058532911 @default.
- W1987393485 hasAuthorship W1987393485A5075308216 @default.
- W1987393485 hasAuthorship W1987393485A5087110409 @default.
- W1987393485 hasAuthorship W1987393485A5087400447 @default.
- W1987393485 hasConcept C126838900 @default.
- W1987393485 hasConcept C134018914 @default.
- W1987393485 hasConcept C143409427 @default.
- W1987393485 hasConcept C154945302 @default.
- W1987393485 hasConcept C2776541429 @default.
- W1987393485 hasConcept C2776886416 @default.
- W1987393485 hasConcept C2779010991 @default.
- W1987393485 hasConcept C2989005 @default.
- W1987393485 hasConcept C31972630 @default.
- W1987393485 hasConcept C36454342 @default.
- W1987393485 hasConcept C41008148 @default.
- W1987393485 hasConcept C54170458 @default.
- W1987393485 hasConcept C71924100 @default.
- W1987393485 hasConceptScore W1987393485C126838900 @default.
- W1987393485 hasConceptScore W1987393485C134018914 @default.
- W1987393485 hasConceptScore W1987393485C143409427 @default.
- W1987393485 hasConceptScore W1987393485C154945302 @default.
- W1987393485 hasConceptScore W1987393485C2776541429 @default.
- W1987393485 hasConceptScore W1987393485C2776886416 @default.
- W1987393485 hasConceptScore W1987393485C2779010991 @default.
- W1987393485 hasConceptScore W1987393485C2989005 @default.
- W1987393485 hasConceptScore W1987393485C31972630 @default.
- W1987393485 hasConceptScore W1987393485C36454342 @default.
- W1987393485 hasConceptScore W1987393485C41008148 @default.
- W1987393485 hasConceptScore W1987393485C54170458 @default.
- W1987393485 hasConceptScore W1987393485C71924100 @default.
- W1987393485 hasLocation W19873934851 @default.
- W1987393485 hasOpenAccess W1987393485 @default.
- W1987393485 hasPrimaryLocation W19873934851 @default.
- W1987393485 hasRelatedWork W1178750945 @default.
- W1987393485 hasRelatedWork W1451224365 @default.
- W1987393485 hasRelatedWork W1515309142 @default.
- W1987393485 hasRelatedWork W1602935646 @default.
- W1987393485 hasRelatedWork W1752202911 @default.
- W1987393485 hasRelatedWork W1984908845 @default.
- W1987393485 hasRelatedWork W1998253794 @default.
- W1987393485 hasRelatedWork W2076775396 @default.
- W1987393485 hasRelatedWork W2166485554 @default.
- W1987393485 hasRelatedWork W2597280008 @default.
- W1987393485 hasRelatedWork W2888970401 @default.
- W1987393485 hasRelatedWork W2904950251 @default.
- W1987393485 hasRelatedWork W2910598182 @default.
- W1987393485 hasRelatedWork W2911319527 @default.
- W1987393485 hasRelatedWork W2955800894 @default.
- W1987393485 hasRelatedWork W2979737112 @default.
- W1987393485 hasRelatedWork W3210050310 @default.
- W1987393485 hasRelatedWork W82606100 @default.
- W1987393485 hasRelatedWork W944333893 @default.
- W1987393485 hasRelatedWork W61529087 @default.
- W1987393485 isParatext "false" @default.
- W1987393485 isRetracted "false" @default.
- W1987393485 magId "1987393485" @default.
- W1987393485 workType "article" @default.