TY - JOUR
T1 - Quantitative analysis of metal artifact reduction in total hip arthroplasty using virtual monochromatic imaging and orthopedic metal artifact reduction, a phantom study
AU - Selles, Mark
AU - Stuivenberg, Vera H
AU - Wellenberg, Ruud H H
AU - van de Riet, Loes
AU - Nijholt, Ingrid M
AU - van Osch, Jochen A C
AU - van Hamersvelt, Robbert W
AU - Leiner, Tim
AU - Boomsma, Martijn F
N1 - Publisher Copyright:
© 2021, The Author(s).
PY - 2021/11/24
Y1 - 2021/11/24
N2 - OBJECTIVE: To quantify metal artifact reduction using 130 keV virtual monochromatic imaging (VMI) with and without orthopedic metal artifact reduction (O-MAR) in total hip arthroplasty.METHODS: Conventional polychromatic images and 130 keV VMI of a phantom with pellets representing bone with unilateral or bilateral prostheses were reconstructed with and without O-MAR on a dual-layer CT. Pellets were categorized as unaffected, mildly affected and severely affected.RESULTS: When 130 keV VMI with O-MAR was compared to conventional imaging with O-MAR, a relative metal artifact reduction in CT values, contrast-to-noise (CNR), signal-to-noise (SNR) and noise in mildly affected pellets (67%, 74%, 48%, 68%, respectively; p < 0.05) was observed but no significant relative metal artifact reduction in severely affected pellets. Comparison between 130 keV VMI without O-MAR and conventional imaging with O-MAR showed relative metal artifact reduction in CT values, CNR, SNR and noise in mildly affected pellets (92%, 72%, 38%, 51%, respectively; p < 0.05) but negative relative metal artifact reduction in CT values and noise in severely affected pellets (- 331% and -223%, respectively; p < 0.05), indicating aggravation of metal artifacts.CONCLUSION: Overall, VMI of 130 keV with O-MAR provided the strongest metal artifact reduction.
AB - OBJECTIVE: To quantify metal artifact reduction using 130 keV virtual monochromatic imaging (VMI) with and without orthopedic metal artifact reduction (O-MAR) in total hip arthroplasty.METHODS: Conventional polychromatic images and 130 keV VMI of a phantom with pellets representing bone with unilateral or bilateral prostheses were reconstructed with and without O-MAR on a dual-layer CT. Pellets were categorized as unaffected, mildly affected and severely affected.RESULTS: When 130 keV VMI with O-MAR was compared to conventional imaging with O-MAR, a relative metal artifact reduction in CT values, contrast-to-noise (CNR), signal-to-noise (SNR) and noise in mildly affected pellets (67%, 74%, 48%, 68%, respectively; p < 0.05) was observed but no significant relative metal artifact reduction in severely affected pellets. Comparison between 130 keV VMI without O-MAR and conventional imaging with O-MAR showed relative metal artifact reduction in CT values, CNR, SNR and noise in mildly affected pellets (92%, 72%, 38%, 51%, respectively; p < 0.05) but negative relative metal artifact reduction in CT values and noise in severely affected pellets (- 331% and -223%, respectively; p < 0.05), indicating aggravation of metal artifacts.CONCLUSION: Overall, VMI of 130 keV with O-MAR provided the strongest metal artifact reduction.
KW - Arthroplasty
KW - CT
KW - Dual energy
KW - Hip
KW - Replacement
UR - http://www.scopus.com/inward/record.url?scp=85119853138&partnerID=8YFLogxK
U2 - 10.1186/s13244-021-01111-5
DO - 10.1186/s13244-021-01111-5
M3 - Article
C2 - 34817722
SN - 1869-4101
VL - 12
JO - Insights into Imaging
JF - Insights into Imaging
IS - 1
M1 - 171
ER -