TY - JOUR
T1 - Metal Artifact Reduction in Routine Chest and Abdominal Examinations Using Virtual Monoenergetic Images from Spectral Detector Computed Tomography
AU - Van Hedent, Steven
AU - Kessner, Rivka
AU - Hokamp, Nils Große
AU - Baran, Tomer Ziv
AU - Kosmas, Christos
AU - Gupta, Amit
N1 - Publisher Copyright:
© 2019 Lippincott Williams and Wilkins. All rights reserved.
PY - 2019/9/1
Y1 - 2019/9/1
N2 - Objective: The objective of this study was to investigate the quantitative and qualitative effects of virtual monoenergetic images (VMIs) by spectral detector computed tomography (SDCT) on metal artifacts in routine examinations. Methods: Fifty-nine patients with metal artifacts (caused by pacemakers, ports, screws, or prosthetic joints) affecting muscular tissue in the chest and/or abdomen were scanned using SDCT. Attenuation values around the metallic device were compared with contralateral unaffected values, for conventional images and 80 to 200 keV VMIs. In addition, general image quality and artifact intensity were rated by 2 readers. Results: The VMIs significantly decreased metal artifact intensity in all patients (P < 0.05). In 39 patients (66.1%), the attenuation values of the artifact and the unaffected area on the optimal keV level were very similar (≤5 Hounsfield unit difference). Qualitative analysis showed that high VMIs significantly improved artifact intensity, with best scores at 140 keV. Conclusions: High monoenergetic images of SDCT significantly reduce metal artifacts, with optimal assessment at 140 keV.
AB - Objective: The objective of this study was to investigate the quantitative and qualitative effects of virtual monoenergetic images (VMIs) by spectral detector computed tomography (SDCT) on metal artifacts in routine examinations. Methods: Fifty-nine patients with metal artifacts (caused by pacemakers, ports, screws, or prosthetic joints) affecting muscular tissue in the chest and/or abdomen were scanned using SDCT. Attenuation values around the metallic device were compared with contralateral unaffected values, for conventional images and 80 to 200 keV VMIs. In addition, general image quality and artifact intensity were rated by 2 readers. Results: The VMIs significantly decreased metal artifact intensity in all patients (P < 0.05). In 39 patients (66.1%), the attenuation values of the artifact and the unaffected area on the optimal keV level were very similar (≤5 Hounsfield unit difference). Qualitative analysis showed that high VMIs significantly improved artifact intensity, with best scores at 140 keV. Conclusions: High monoenergetic images of SDCT significantly reduce metal artifacts, with optimal assessment at 140 keV.
KW - artifacts
KW - dual-energy computed tomography
KW - spectral detector
KW - virtual monoenergetic images
UR - http://www.scopus.com/inward/record.url?scp=85073184384&partnerID=8YFLogxK
U2 - 10.1097/RCT.0000000000000901
DO - 10.1097/RCT.0000000000000901
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C2 - 31356522
AN - SCOPUS:85073184384
SN - 0363-8715
VL - 43
SP - 713
EP - 717
JO - Journal of Computer Assisted Tomography
JF - Journal of Computer Assisted Tomography
IS - 5
ER -