High-Resolution C-Arm CT and Metal Artifact Reduction Software: A Novel Imaging Modality for Analyzing Aneurysms Treated with Stent-Assisted Coil Embolization
| Autor: | Yuichi Murayama, Hiroyuki Takao, Yukiko Abe, Ayako Ikemura, Issei Kan, Ashraf Mohamed, Chihebeddine Dahmani, Ichiro Yuki, Toshihiro Ishibashi, Yukinao Kambayashi, Mitsuyoshi Urashima, Tomoaki Suzuki |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
medicine.medical_specialty
genetic structures Image quality Swine medicine.medical_treatment 030218 nuclear medicine & medical imaging 03 medical and health sciences Metal Artifact 0302 clinical medicine Aneurysm medicine Image Processing Computer-Assisted Animals Radiology Nuclear Medicine and imaging Embolization cardiovascular diseases Image analysis Interventional business.industry Stent Intracranial Aneurysm medicine.disease equipment and supplies Embolization Therapeutic Disease Models Animal Electromagnetic coil Stents Neurology (clinical) Radiology Tomography Nuclear medicine business Artifacts Tomography X-Ray Computed 030217 neurology & neurosurgery Software |
| Zdroj: | AJNR Am J Neuroradiol |
| Popis: | BACKGROUND AND PURPOSE: Combination of high-resolution C-arm CT and novel metal artifact reduction software may contribute to the assessment of aneurysms treated with stent-assisted coil embolization. This study aimed to evaluate the efficacy of a novel Metal Artifact Reduction prototype software combined with the currently available high spatial-resolution C-arm CT prototype implementation by using an experimental aneurysm model treated with stent-assisted coil embolization. MATERIALS AND METHODS: Eight experimental aneurysms were created in 6 swine. Coil embolization of each aneurysm was performed by using a stent-assisted technique. High-resolution C-arm CT with intra-arterial contrast injection was performed immediately after the treatment. The obtained images were processed with Metal Artifact Reduction. Five neurointerventional specialists reviewed the image quality before and after Metal Artifact Reduction. Observational and quantitative analyses (via image analysis software) were performed. RESULTS: Every aneurysm was successfully created and treated with stent-assisted coil embolization. Before Metal Artifact Reduction, coil loops protruding through the stent lumen were not visualized due to the prominent metal artifacts produced by the coils. These became visible after Metal Artifact Reduction processing. Contrast filling in the residual aneurysm was also visualized after Metal Artifact Reduction in every aneurysm. Both the observational (P < .0001) and quantitative (P < .001) analyses showed significant reduction of the metal artifacts after application of the Metal Artifact Reduction prototype software. CONCLUSIONS: The combination of high-resolution C-arm CT and Metal Artifact Reduction enables differentiation of the coil mass, stent, and contrast material on the same image by significantly reducing the metal artifacts produced by the platinum coils. This novel image technique may improve the assessment of aneurysms treated with stent-assisted coil embolization. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|