Single-Energy Metal Artifact Reduction (SEMAR) in Ultra-High-Resolution CT Angiography of Patients with Intracranial Implants
Purpose: To evaluate the effects of single-energy metal artifact reduction (SEMAR) on image quality of ultra-high-resolution CT-angiography (UHR-CTA) with intracranial implants after aneurysm treatment. Methods: Image quality of standard and SEMAR-reconstructed UHR-CT-angiography images of 54 patien...
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| Format: | Article |
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MDPI AG
2023-02-01
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| Series: | Diagnostics |
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| Online Access: | https://www.mdpi.com/2075-4418/13/4/620 |
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| author | Abdullah Jabas Mario Alberto Abello Mercado Sebastian Altmann Florian Ringel Christian Booz Andrea Kronfeld Antoine P. Sanner Marc A. Brockmann Ahmed E. Othman |
| author_facet | Abdullah Jabas Mario Alberto Abello Mercado Sebastian Altmann Florian Ringel Christian Booz Andrea Kronfeld Antoine P. Sanner Marc A. Brockmann Ahmed E. Othman |
| author_sort | Abdullah Jabas |
| collection | DOAJ |
| description | Purpose: To evaluate the effects of single-energy metal artifact reduction (SEMAR) on image quality of ultra-high-resolution CT-angiography (UHR-CTA) with intracranial implants after aneurysm treatment. Methods: Image quality of standard and SEMAR-reconstructed UHR-CT-angiography images of 54 patients who underwent coiling or clipping was retrospectively evaluated. Image noise (i.e., index for metal-artifact strength) was analyzed in close proximity to and more distally from the metal implant. Frequencies and intensities of metal artifacts were additionally measured and intensity-differences between both reconstructions were compared in different frequencies and distances. Qualitative analysis was performed by two radiologists using a four-point Likert-scale. All measured results from both quantitative and qualitative analysis were then compared between coils and clips. Results: Metal artifact index (MAI) and the intensity of coil-artifacts were significantly lower in SEMAR than in standard CTA in close vicinity to and more distally from the coil-package (<i>p</i> < 0.001, each). MAI and the intensity of clip-artifacts were significantly lower in close vicinity (<i>p</i> = 0.036; <i>p</i> < 0.001, respectively) and more distally from the clip (<i>p</i> = 0.007; <i>p</i> < 0.001, respectively). In patients with coils, SEMAR was significantly superior in all qualitative categories to standard images (<i>p</i> < 0.001), whereas in patients with clips, only artifacts were significantly less (<i>p</i> < 0.05) for SEMAR. Conclusion: SEMAR significantly reduces metal artifacts in UHR-CT-angiography images with intracranial implants and improves image quality and diagnostic confidence. SEMAR effects were strongest in patients with coils, whereas the effects were minor in patients with titanium-clips due to the absent of or minimal artifacts. |
| first_indexed | 2024-03-11T08:57:15Z |
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| institution | Directory Open Access Journal |
| issn | 2075-4418 |
| language | English |
| last_indexed | 2024-03-11T08:57:15Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Diagnostics |
| spelling | doaj.art-b11772b8090d4068982657039636e4e32023-11-16T20:00:33ZengMDPI AGDiagnostics2075-44182023-02-0113462010.3390/diagnostics13040620Single-Energy Metal Artifact Reduction (SEMAR) in Ultra-High-Resolution CT Angiography of Patients with Intracranial ImplantsAbdullah Jabas0Mario Alberto Abello Mercado1Sebastian Altmann2Florian Ringel3Christian Booz4Andrea Kronfeld5Antoine P. Sanner6Marc A. Brockmann7Ahmed E. Othman8Department of Neuroradiology, University Medical Center Mainz, Langenbeckstraße 1, 55131 Mainz, GermanyDepartment of Neuroradiology, University Medical Center Mainz, Langenbeckstraße 1, 55131 Mainz, GermanyDepartment of Neuroradiology, University Medical Center Mainz, Langenbeckstraße 1, 55131 Mainz, GermanyDepartment of Neurosurgery, University Medical Center Mainz, Langenbeckstraße 1, 55131 Mainz, GermanyDepartment of Diagnostic and Interventional Radiology, University Hospital Frankfurt, 60590 Frankfurt, GermanyDepartment of Neuroradiology, University Medical Center Mainz, Langenbeckstraße 1, 55131 Mainz, GermanyDepartment of Neuroradiology, University Medical Center Mainz, Langenbeckstraße 1, 55131 Mainz, GermanyDepartment of Neuroradiology, University Medical Center Mainz, Langenbeckstraße 1, 55131 Mainz, GermanyDepartment of Neuroradiology, University Medical Center Mainz, Langenbeckstraße 1, 55131 Mainz, GermanyPurpose: To evaluate the effects of single-energy metal artifact reduction (SEMAR) on image quality of ultra-high-resolution CT-angiography (UHR-CTA) with intracranial implants after aneurysm treatment. Methods: Image quality of standard and SEMAR-reconstructed UHR-CT-angiography images of 54 patients who underwent coiling or clipping was retrospectively evaluated. Image noise (i.e., index for metal-artifact strength) was analyzed in close proximity to and more distally from the metal implant. Frequencies and intensities of metal artifacts were additionally measured and intensity-differences between both reconstructions were compared in different frequencies and distances. Qualitative analysis was performed by two radiologists using a four-point Likert-scale. All measured results from both quantitative and qualitative analysis were then compared between coils and clips. Results: Metal artifact index (MAI) and the intensity of coil-artifacts were significantly lower in SEMAR than in standard CTA in close vicinity to and more distally from the coil-package (<i>p</i> < 0.001, each). MAI and the intensity of clip-artifacts were significantly lower in close vicinity (<i>p</i> = 0.036; <i>p</i> < 0.001, respectively) and more distally from the clip (<i>p</i> = 0.007; <i>p</i> < 0.001, respectively). In patients with coils, SEMAR was significantly superior in all qualitative categories to standard images (<i>p</i> < 0.001), whereas in patients with clips, only artifacts were significantly less (<i>p</i> < 0.05) for SEMAR. Conclusion: SEMAR significantly reduces metal artifacts in UHR-CT-angiography images with intracranial implants and improves image quality and diagnostic confidence. SEMAR effects were strongest in patients with coils, whereas the effects were minor in patients with titanium-clips due to the absent of or minimal artifacts.https://www.mdpi.com/2075-4418/13/4/620metal artifact reductionartifactscomputed tomography angiographyultra-high-resolution computed tomographyintracranial aneurysm |
| spellingShingle | Abdullah Jabas Mario Alberto Abello Mercado Sebastian Altmann Florian Ringel Christian Booz Andrea Kronfeld Antoine P. Sanner Marc A. Brockmann Ahmed E. Othman Single-Energy Metal Artifact Reduction (SEMAR) in Ultra-High-Resolution CT Angiography of Patients with Intracranial Implants Diagnostics metal artifact reduction artifacts computed tomography angiography ultra-high-resolution computed tomography intracranial aneurysm |
| title | Single-Energy Metal Artifact Reduction (SEMAR) in Ultra-High-Resolution CT Angiography of Patients with Intracranial Implants |
| title_full | Single-Energy Metal Artifact Reduction (SEMAR) in Ultra-High-Resolution CT Angiography of Patients with Intracranial Implants |
| title_fullStr | Single-Energy Metal Artifact Reduction (SEMAR) in Ultra-High-Resolution CT Angiography of Patients with Intracranial Implants |
| title_full_unstemmed | Single-Energy Metal Artifact Reduction (SEMAR) in Ultra-High-Resolution CT Angiography of Patients with Intracranial Implants |
| title_short | Single-Energy Metal Artifact Reduction (SEMAR) in Ultra-High-Resolution CT Angiography of Patients with Intracranial Implants |
| title_sort | single energy metal artifact reduction semar in ultra high resolution ct angiography of patients with intracranial implants |
| topic | metal artifact reduction artifacts computed tomography angiography ultra-high-resolution computed tomography intracranial aneurysm |
| url | https://www.mdpi.com/2075-4418/13/4/620 |
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