Jabas, Abdullah ; Abello Mercado, Mario Alberto ; Altmann, Sebastian ; Ringel, Florian ; Booz, Christian ; Kronfeld, Andrea ; Sanner, Antoine P. ; Brockmann, Marc A. ; Othman, Ahmed E. (2023)
Single-Energy Metal Artifact Reduction (SEMAR) in Ultra-High-Resolution CT Angiography of Patients with Intracranial Implants.
In: Diagnostics, 13 (4)
doi: 10.3390/diagnostics13040620
Article, Bibliographie
Abstract
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-CTangiography 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 (p < 0.001, each). MAI and the intensity of clip-artifacts were significantly lower in close vicinity (p = 0.036; p < 0.001, respectively) and more distally from the clip (p = 0.007; p < 0.001, respectively). In patients with coils, SEMAR was significantly superior in all qualitative categories to standard images (p < 0.001), whereas in patients with clips, only artifacts were significantly less (p < 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.
| Item Type: | Article |
|---|---|
| Erschienen: | 2023 |
| Creators: | Jabas, Abdullah ; Abello Mercado, Mario Alberto ; Altmann, Sebastian ; Ringel, Florian ; Booz, Christian ; Kronfeld, Andrea ; Sanner, Antoine P. ; Brockmann, Marc A. ; Othman, Ahmed E. |
| Type of entry: | Bibliographie |
| Title: | Single-Energy Metal Artifact Reduction (SEMAR) in Ultra-High-Resolution CT Angiography of Patients with Intracranial Implants |
| Language: | English |
| Date: | 8 February 2023 |
| Publisher: | MDPI |
| Journal or Publication Title: | Diagnostics |
| Volume of the journal: | 13 |
| Issue Number: | 4 |
| DOI: | 10.3390/diagnostics13040620 |
| Abstract: | 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-CTangiography 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 (p < 0.001, each). MAI and the intensity of clip-artifacts were significantly lower in close vicinity (p = 0.036; p < 0.001, respectively) and more distally from the clip (p = 0.007; p < 0.001, respectively). In patients with coils, SEMAR was significantly superior in all qualitative categories to standard images (p < 0.001), whereas in patients with clips, only artifacts were significantly less (p < 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. |
| Uncontrolled Keywords: | metal artifact reduction, artifacts, computed tomography angiography, ultra-high-resolution computed tomography, intracranial aneurysm |
| Additional Information: | Art.No.: 620 |
| Divisions: | 20 Department of Computer Science 20 Department of Computer Science > Interactive Graphics Systems |
| Date Deposited: | 18 Sep 2023 13:42 |
| Last Modified: | 20 Sep 2023 11:22 |
| PPN: | 511776780 |
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| Suche nach Titel in: | TUfind oder in Google |
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