Open AccessCOMPARISON OF METAL ARTEFACTS FOR DIFFERENT DUAL ENERGY CT TECHNIQUES
Author(s) -
Erik Pettersson,
Anna Bäck,
Anne ThilanderKlang
Publication year - 2021
Publication title -
radiation protection dosimetry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.392
H-Index - 72
eISSN - 1742-3406
pISSN - 0144-8420
DOI - 10.1093/rpd/ncab105
Subject(s) - streak , imaging phantom , dual energy , materials science , nuclear medicine , titanium , computed tomography , biomedical engineering , radiology , medicine , physics , optics , pathology , bone mineral , osteoporosis , metallurgy
This study compares dual-energy computed tomography (DECT) images of a phantom including different material inserts and with additional lateral titanium or stainless steel inserts, simulating bilateral hip prostheses. Dual-source (DS) and fast kV-switching (FKS) DECT with/without metal artefact reduction (MAR) were compared with regards to virtually monoenergetic CT number accuracy and the depiction of different materials. Streak artefacts were observed between the metal inserts that were more severe with steel compared to titanium inserts. The artefact severity and CT number accuracy depended on the photon energy (keV) for both DECT techniques. While MAR generally increased the CT number accuracy and material depiction within the streak artefacts, it sometimes decreased the accuracy outside the streak artefacts for both DS and FKS. FKS depicted the metal inserts more accurately than DS with regards to both CT numbers and external diameter.