TY - JOUR
T1 - Computed tomography imaging of a hip prosthesis using iterativemodel-based reconstruction and orthopaedicmetal artefact reduction
T2 - A quantitative analysis
AU - Wellenberg, Ruud H.H.
AU - Boomsma, Martijn F.
AU - van Osch, Jochen A.C.
AU - Vlassenbroek, Alain
AU - Milles, Julien
AU - Edens, Mireille A.
AU - Streekstra, Geert J.
AU - Slump, Cornelis H.
AU - Maas, Mario
PY - 2016/1/1
Y1 - 2016/1/1
N2 - Objectives: To quantify the combined use of iterative model-based reconstruction (IMR) and orthopaedic metal artefact reduction (O-MAR) in reducing metal artefacts and improving image quality in a total hip arthroplasty phantom.Methods: Scans acquired at several dose levels and kVps were reconstructed with filtered back-projection (FBP), iterative reconstruction (iDose4) and IMR, with and without O-MAR. Computed tomography (CT) numbers, noise levels, signal-to-noise-ratios and contrast-to-noise-ratios were analysed.Results: Iterative model-based reconstruction results in overall improved image quality compared to iDose4 and FBP (P < 0.001).Orthopaedicmetal artefact reduction is most effective in reducing severe metal artefacts improving CT number accuracy by 50%, 60%, and 63% (P < 0.05) and reducing noise by 1%, 62%, and 85% (P < 0.001) whereas improving signal-to-noise-ratios by 27%, 47%, and 46% (P < 0.001) and contrastto-noise-ratios by 16%, 25%, and 19% (P < 0.001) with FBP, iDose4 , and IMR, respectively.Conclusions: The combined use of IMR and O-MAR strongly improves overall image quality and strongly reduces metal artefacts in the CT imaging of a total hip arthroplasty phantom.
AB - Objectives: To quantify the combined use of iterative model-based reconstruction (IMR) and orthopaedic metal artefact reduction (O-MAR) in reducing metal artefacts and improving image quality in a total hip arthroplasty phantom.Methods: Scans acquired at several dose levels and kVps were reconstructed with filtered back-projection (FBP), iterative reconstruction (iDose4) and IMR, with and without O-MAR. Computed tomography (CT) numbers, noise levels, signal-to-noise-ratios and contrast-to-noise-ratios were analysed.Results: Iterative model-based reconstruction results in overall improved image quality compared to iDose4 and FBP (P < 0.001).Orthopaedicmetal artefact reduction is most effective in reducing severe metal artefacts improving CT number accuracy by 50%, 60%, and 63% (P < 0.05) and reducing noise by 1%, 62%, and 85% (P < 0.001) whereas improving signal-to-noise-ratios by 27%, 47%, and 46% (P < 0.001) and contrastto-noise-ratios by 16%, 25%, and 19% (P < 0.001) with FBP, iDose4 , and IMR, respectively.Conclusions: The combined use of IMR and O-MAR strongly improves overall image quality and strongly reduces metal artefacts in the CT imaging of a total hip arthroplasty phantom.
KW - CT
KW - Hip phantom
KW - Iterative model-based reconstruction
KW - Metal artefacts
KW - O-MAR
KW - 2023 OA procedure
UR - http://www.scopus.com/inward/record.url?scp=84975527585&partnerID=8YFLogxK
U2 - 10.1097/RCT.0000000000000449
DO - 10.1097/RCT.0000000000000449
M3 - Article
C2 - 27331924
AN - SCOPUS:84975527585
SN - 0363-8715
VL - 40
SP - 971
EP - 978
JO - Journal of Computer Assisted Tomography
JF - Journal of Computer Assisted Tomography
IS - 6
ER -