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Motion artifact correction for cone beam CT stroke imaging: a prospective series

医学 工件(错误) 冲程(发动机) 系列(地层学) 锥束ct 放射科 计算机断层摄影术 计算机视觉 计算机科学 物理 生物 热力学 古生物学
作者
Nicole M Cancelliere,Fred van Nijnatten,Eric Hummel,P.J. Withagen,Peter van de Haar,Hidehisa Nishi,Ronit Agid,Patrick Nicholson,Bertan Hallacoglu,Marijke van Vlimmeren,Vítor Mendes Pereira
出处
期刊:Journal of NeuroInterventional Surgery [BMJ]
卷期号:15 (e2): e223-e228 被引量:2
标识
DOI:10.1136/jnis-2021-018201
摘要

Background Imaging assessment for acute ischemic stroke (AIS) patients in the angiosuite using cone beam CT (CBCT) has created increased interest since endovascular treatment became the first line therapy for proximal vessel occlusions. One of the main challenges of CBCT imaging in AIS patients is degraded image quality due to motion artifacts. This study aims to evaluate the prevalence of motion artifacts in CBCT stroke imaging and the effectiveness of a novel motion artifact correction algorithm for image quality improvement. Methods Patients presenting with acute stroke symptoms and considered for endovascular treatment were included in the study. CBCT scans were performed using the angiosuite X-ray system. All CBCT scans were post-processed using a motion artifact correction algorithm. Motion artifacts were scored before and after processing using a 4-point scale. Results We prospectively included 310 CBCT scans from acute stroke patients. 51% (n=159/310) of scans had motion artifacts, with 24% being moderate to severe. The post-processing algorithm improved motion artifacts in 91% of scans with motion (n=144/159), restoring clinical diagnostic capability in 34%. Overall, 76% of the scans were sufficient for clinical decision-making before correction, which improved to 93% (n=289/310) after post-processing with our algorithm. Conclusions Our results demonstrate that CBCT motion artifacts are significantly reduced using a novel post-processing algorithm, which improved brain CBCT image quality and diagnostic assessment for stroke. This is an important step on the road towards a direct-to-angio approach for endovascular thrombectomy (EVT) treatment.
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