{"id":19378,"date":"2021-03-13T12:00:00","date_gmt":"2021-03-13T18:00:00","guid":{"rendered":"http:\/\/www.ajnrblog.org\/?p=19378"},"modified":"2021-03-12T15:17:50","modified_gmt":"2021-03-12T21:17:50","slug":"evaluation-of-artificial-intelligence-powered-identification-of-large-vessel-occlusions-in-a-comprehensive-stroke-center","status":"publish","type":"post","link":"https:\/\/www.ajnrblog.org\/2021\/03\/13\/evaluation-of-artificial-intelligence-powered-identification-of-large-vessel-occlusions-in-a-comprehensive-stroke-center\/","title":{"rendered":"Evaluation of Artificial Intelligence\u2013Powered Identification of Large-Vessel Occlusions in a Comprehensive Stroke Center"},"content":{"rendered":"<div class=\"editor-comment\">\n<h1>Editor’s Choice<\/h1>\n<p>The authors’ evaluation of Viz LVO shows that the system has the potential for early identification of patients with stroke with large-vessel occlusions, hopefully improving future management and stroke care.<\/p>\n<p class=\"signature\"><img decoding=\"async\" src=\"http:\/\/www.ajnrblog.org\/wp-content\/uploads\/ross-signature.png\" alt=\"\" \/><\/p>\n<p><!--more--><\/p>\n<\/div>\n<h2 class=\"signature\">Abstract<\/h2>\n<div id=\"sec-1\" class=\"subsection\">\n<h3 id=\"p-3\">BACKGROUND AND PURPOSE<\/h3>\n<figure id=\"attachment_19379\" aria-describedby=\"caption-attachment-19379\" style=\"width: 300px\" class=\"wp-caption alignright\"><a href=\"http:\/\/www.ajnrblog.org\/wp-content\/uploads\/F4.large-6.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-19379 size-medium\" src=\"http:\/\/www.ajnrblog.org\/wp-content\/uploads\/F4.large-6-300x206.jpg\" alt=\"Figure 4 from Yahav-Dovrat et al\" width=\"300\" height=\"206\" srcset=\"https:\/\/www.ajnrblog.org\/wp-content\/uploads\/F4.large-6-300x206.jpg 300w, https:\/\/www.ajnrblog.org\/wp-content\/uploads\/F4.large-6-630x432.jpg 630w, https:\/\/www.ajnrblog.org\/wp-content\/uploads\/F4.large-6-150x103.jpg 150w, https:\/\/www.ajnrblog.org\/wp-content\/uploads\/F4.large-6.jpg 1280w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><figcaption id=\"caption-attachment-19379\" class=\"wp-caption-text\">Overview of the algorithm steps. <em>A<\/em>, Identification of an applicable scan based on metadata. <em>B<\/em>, Cropping the head region. Registration (<em>C<\/em>) and segmentation (<em>D<\/em>) of ICA-T\/M1 regions. <em>E<\/em>, Additional segmentation of all vessels. Refinement of the segmentations to include only the MCA branches (<em>F<\/em>) and detection of suspected LVO based on vessel length (<em>G<\/em>).<\/figcaption><\/figure>\n<p>Artificial intelligence algorithms have the potential to become an important diagnostic tool to optimize stroke workflow. Viz LVO is a medical product leveraging a convolutional neural network designed to detect large-vessel occlusions on CTA scans and notify the treatment team within minutes via a dedicated mobile application. We aimed to evaluate the detection accuracy of the Viz LVO in real clinical practice at a comprehensive stroke center.<\/p>\n<div id=\"sec-2\" class=\"subsection\">\n<h3 id=\"p-4\">MATERIALS AND METHODS<\/h3>\n<p>Viz LVO was installed for this study in a comprehensive stroke center. All consecutive head and neck CTAs performed from January 2018 to March 2019 were scanned by the algorithm for detection of large-vessel occlusions. The system results were compared with the formal reports of senior neuroradiologists used as ground truth for the presence of a large-vessel occlusion.<\/p>\n<\/div>\n<div id=\"sec-3\" class=\"subsection\">\n<h3 id=\"p-5\">RESULTS<\/h3>\n<p>A total of 1167 CTAs were included in the study. Of these, 404 were stroke protocols. Seventy-five (6.4%) patients had a large-vessel occlusion as ground truth; 61 were detected by the system. Sensitivity was 0.81, negative predictive value was 0.99, and accuracy was 0.94. In the stroke protocol subgroup, 72 (17.8%) of 404 patients had a large-vessel occlusion, with 59 identified by the system, showing a sensitivity of 0.82, negative predictive value of 0.96, and accuracy of 0.89.<\/p>\n<\/div>\n<div id=\"sec-4\" class=\"subsection\">\n<h3 id=\"p-6\">CONCLUSIONS<\/h3>\n<p>Our experience evaluating Viz LVO shows that the system has the potential for early identification of patients with stroke with large-vessel occlusions, hopefully improving future management and stroke care.<\/p>\n<\/div>\n<\/div>\n<p><strong>Read this article: <a href=\"https:\/\/bit.ly\/3vu3Bui\">https:\/\/bit.ly\/3vu3Bui<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Editor’s Choice The authors’ evaluation of Viz LVO shows that the system has the potential for early identification of patients with stroke with large-vessel occlusions, hopefully improving future management and stroke care.<\/p>\n","protected":false},"author":21,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,58],"tags":[1611,1606],"class_list":["post-19378","post","type-post","status-publish","format-standard","hentry","category-brain","category-editors-choices","tag-artificial-intelligence","tag-large-vessel-occlusion"],"_links":{"self":[{"href":"https:\/\/www.ajnrblog.org\/wp-json\/wp\/v2\/posts\/19378","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ajnrblog.org\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ajnrblog.org\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ajnrblog.org\/wp-json\/wp\/v2\/users\/21"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ajnrblog.org\/wp-json\/wp\/v2\/comments?post=19378"}],"version-history":[{"count":2,"href":"https:\/\/www.ajnrblog.org\/wp-json\/wp\/v2\/posts\/19378\/revisions"}],"predecessor-version":[{"id":19463,"href":"https:\/\/www.ajnrblog.org\/wp-json\/wp\/v2\/posts\/19378\/revisions\/19463"}],"wp:attachment":[{"href":"https:\/\/www.ajnrblog.org\/wp-json\/wp\/v2\/media?parent=19378"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ajnrblog.org\/wp-json\/wp\/v2\/categories?post=19378"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ajnrblog.org\/wp-json\/wp\/v2\/tags?post=19378"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}