Cargando…
Comparison of Metal Artifact Reduction Algorithms in Patients with Hip Prostheses: Virtual Monoenergetic Images vs. Orthopedic Metal Artifact Reduction
PURPOSE: To assess the usefulness of various metal artifact reduction (MAR) methods in patients with hip prostheses. MATERIALS AND METHODS: This retrospective study included 47 consecutive patients who underwent hip arthroplasty and dual-energy CT. Conventional polyenergetic image (CI), orthopedic-M...
Formato: | Online Artículo Texto |
---|---|
Lenguaje: | English |
Publicado: |
The Korean Society of Radiology
2022
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9748456/ https://www.ncbi.nlm.nih.gov/pubmed/36545406 http://dx.doi.org/10.3348/jksr.2021.0130 |
_version_ | 1784849827914317824 |
---|---|
collection | PubMed |
description | PURPOSE: To assess the usefulness of various metal artifact reduction (MAR) methods in patients with hip prostheses. MATERIALS AND METHODS: This retrospective study included 47 consecutive patients who underwent hip arthroplasty and dual-energy CT. Conventional polyenergetic image (CI), orthopedic-MAR (O-MAR), and virtual monoenergetic image (VMI, 50–200 keV) were tested for MAR. Quantitative analysis was performed in seven regions around the prostheses. Qualitative assessments included evaluation of the degree of artifacts and the presence of secondary artifacts. RESULTS: The lowest amount of image noise was observed in the O-MAR, followed by the VMI. O-MAR also showed the lowest artifact index, followed by high-keV VMI in the range of 120–200 keV (soft tissue) or 200 keV (bone). O-MAR had the highest contrast-to-noise ratio (CNR) in regions with severe hypodense artifacts, while VMI had the highest CNR in other regions, including the periprosthetic bone. On assessment of the CI of pelvic soft tissues, VMI showed a higher structural similarity than O-MAR. Upon qualitative analysis, metal artifacts were significantly reduced in O-MAR, followed by that in VMI, while secondary artifacts were the most frequently found in the O-MAR (p < 0.001). CONCLUSION: O-MAR is the best technique for severe MAR, but it can generate secondary artifacts. VMI at high keV can be advantageous for evaluating periprosthetic bone. |
format | Online Article Text |
id | pubmed-9748456 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | The Korean Society of Radiology |
record_format | MEDLINE/PubMed |
spelling | pubmed-97484562022-12-20 Comparison of Metal Artifact Reduction Algorithms in Patients with Hip Prostheses: Virtual Monoenergetic Images vs. Orthopedic Metal Artifact Reduction J Korean Soc Radiol Musculoskeletal Imaging PURPOSE: To assess the usefulness of various metal artifact reduction (MAR) methods in patients with hip prostheses. MATERIALS AND METHODS: This retrospective study included 47 consecutive patients who underwent hip arthroplasty and dual-energy CT. Conventional polyenergetic image (CI), orthopedic-MAR (O-MAR), and virtual monoenergetic image (VMI, 50–200 keV) were tested for MAR. Quantitative analysis was performed in seven regions around the prostheses. Qualitative assessments included evaluation of the degree of artifacts and the presence of secondary artifacts. RESULTS: The lowest amount of image noise was observed in the O-MAR, followed by the VMI. O-MAR also showed the lowest artifact index, followed by high-keV VMI in the range of 120–200 keV (soft tissue) or 200 keV (bone). O-MAR had the highest contrast-to-noise ratio (CNR) in regions with severe hypodense artifacts, while VMI had the highest CNR in other regions, including the periprosthetic bone. On assessment of the CI of pelvic soft tissues, VMI showed a higher structural similarity than O-MAR. Upon qualitative analysis, metal artifacts were significantly reduced in O-MAR, followed by that in VMI, while secondary artifacts were the most frequently found in the O-MAR (p < 0.001). CONCLUSION: O-MAR is the best technique for severe MAR, but it can generate secondary artifacts. VMI at high keV can be advantageous for evaluating periprosthetic bone. The Korean Society of Radiology 2022-11 2022-04-20 /pmc/articles/PMC9748456/ /pubmed/36545406 http://dx.doi.org/10.3348/jksr.2021.0130 Text en Copyrights © 2022 The Korean Society of Radiology https://creativecommons.org/licenses/by-nc/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (https://creativecommons.org/licenses/by-nc/4.0 (https://creativecommons.org/licenses/by-nc/4.0/) ) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Musculoskeletal Imaging Comparison of Metal Artifact Reduction Algorithms in Patients with Hip Prostheses: Virtual Monoenergetic Images vs. Orthopedic Metal Artifact Reduction |
title | Comparison of Metal Artifact Reduction Algorithms in Patients with Hip Prostheses: Virtual Monoenergetic Images vs. Orthopedic Metal Artifact Reduction |
title_full | Comparison of Metal Artifact Reduction Algorithms in Patients with Hip Prostheses: Virtual Monoenergetic Images vs. Orthopedic Metal Artifact Reduction |
title_fullStr | Comparison of Metal Artifact Reduction Algorithms in Patients with Hip Prostheses: Virtual Monoenergetic Images vs. Orthopedic Metal Artifact Reduction |
title_full_unstemmed | Comparison of Metal Artifact Reduction Algorithms in Patients with Hip Prostheses: Virtual Monoenergetic Images vs. Orthopedic Metal Artifact Reduction |
title_short | Comparison of Metal Artifact Reduction Algorithms in Patients with Hip Prostheses: Virtual Monoenergetic Images vs. Orthopedic Metal Artifact Reduction |
title_sort | comparison of metal artifact reduction algorithms in patients with hip prostheses: virtual monoenergetic images vs. orthopedic metal artifact reduction |
topic | Musculoskeletal Imaging |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9748456/ https://www.ncbi.nlm.nih.gov/pubmed/36545406 http://dx.doi.org/10.3348/jksr.2021.0130 |
work_keys_str_mv | AT comparisonofmetalartifactreductionalgorithmsinpatientswithhipprosthesesvirtualmonoenergeticimagesvsorthopedicmetalartifactreduction AT comparisonofmetalartifactreductionalgorithmsinpatientswithhipprosthesesvirtualmonoenergeticimagesvsorthopedicmetalartifactreduction AT comparisonofmetalartifactreductionalgorithmsinpatientswithhipprosthesesvirtualmonoenergeticimagesvsorthopedicmetalartifactreduction AT comparisonofmetalartifactreductionalgorithmsinpatientswithhipprosthesesvirtualmonoenergeticimagesvsorthopedicmetalartifactreduction |