WFRF:(Thunberg Per 1968 )
Search: WFRF:(Thunberg Per 1968 ) > Metal artifacts in ...
- 11 of 62
- Previous record
- Next record
- To hitlist
Metal artifacts in computed tomography : impact of reduction methods on image quality and radiotherapy treatment planning
-
- Andersson, Karin, 1989- (author)
- Örebro universitet,Institutionen för medicinska vetenskaper
-
- Thunberg, Per, docent, 1968- (thesis advisor)
- Örebro universitet,Institutionen för medicinska vetenskaper
-
- Norrman, Eva, 1966- (thesis advisor)
- Örebro universitet,Institutionen för medicinska vetenskaper,Region Örebro län
- show more...
- show less...
- (creator_code:org_t)
- ISBN 9789175292281
- Örebro : Örebro University, 2018
- English 81 s.
- Series: Örebro Studies in Medicine, 1652-4063 ; 172
- Doctoral thesis (other academic/artistic)
Abstract
Subject headings
Close
- Degradation of image quality by metal artifacts is a common problem in computed tomography (CT) imaging, which can limit the diagnostic value of a CT examination and also introduce inaccuracies in radiotherapy (RT) treatment planning. In recent years, commercial metal artifact reduction (MAR) methods have been launched by several CT vendors. The overall aim of this thesis was to evaluate MAR methods in diagnostic imaging and RT treatment planning.Evaluations of hip prosthesis phantom CT images showed that MAR algorithms in general improved image quality, based on both visual grading analysis and quantitative measures, while the application of virtual monoenergetic reconstructions insufficiently reduced metal artifacts. In some cases additional artifacts were introduced by the MAR algorithms. MAR algorithms were also evaluated in hip prosthesis phantom CT imaging used for proton therapy treatment planning, where improvements in dose calculation accuracy were observed.Studies of Head & Neck (H&N) implant CT images in RT treatment planning were also performed. By visual grading of anatomy visualization with respect to target delineation in dental implant patient images, MAR algorithms were shown to significantly improve image quality. However, only minor effects of H&N implant artifacts on proton dose distributions were seen. The impact might be greater for more severe artifacts than those studied here, and thus further investigations of such cases are needed.In conclusion, MAR algorithms have been shown to enhance image quality for diagnostic applications and to improve anatomy visualization in RT treatment planning. The MAR algorithms led to increased proton dose calculation accuracy in some cases, while in other situations only minor changes were seen.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Kirurgi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Surgery (hsv//eng)
Keyword
- computed tomography
- metal artifacts
- image quality
- visual grading analysis
- radiotherapy
- proton therapy
- hip prosthesis
- dental implants
Publication and Content Type
- vet (subject category)
- dok (subject category)
Find in a library
- Metal artifacts in computed tomography impact of reduction methods on image qual... (Search the publication in LIBRIS)
To the university's database
- 11 of 62
- Previous record
- Next record
- To hitlist
Find more in SwePub
- By the author/editor
- Andersson, Karin ...
- Thunberg, Per, d ...
- Norrman, Eva, 19 ...
- Persliden, Jan, ...
- Tingberg, Anders ...
- About the subject
-
- MEDICAL AND HEALTH SCIENCES
- MEDICAL AND HEAL ...
- and Clinical Medicin ...
- and Surgery
- Parts in the series
- Örebro Studies i ...
- By the university
- Örebro University
Search outside SwePub
- Extend your search to:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - National Library Systems
- LIBRIS.kb.se
