{"id":138576,"date":"2023-05-18T09:39:49","date_gmt":"2023-05-18T13:39:49","guid":{"rendered":"https:\/\/webapp2.wright.edu\/web1\/newsroom\/?p=138576"},"modified":"2023-05-18T09:42:24","modified_gmt":"2023-05-18T13:42:24","slug":"wright-state-graduates-research-helps-calculate-blood-velocity-predict-how-aneurysms-rupture","status":"publish","type":"post","link":"https:\/\/webapp2.wright.edu\/web1\/newsroom\/2023\/05\/18\/wright-state-graduates-research-helps-calculate-blood-velocity-predict-how-aneurysms-rupture\/","title":{"rendered":"Wright State graduate\u2019s research helps calculate blood velocity, predict how aneurysms rupture"},"content":{"rendered":"
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Mark Johnson, who earned a Ph.D. in Engineering from Wright State, uses dye visualization velocimetry to help calculate blood velocity and wall shear stress to help doctors more accurately predict how aneurysms rupture.<\/p><\/div>\n

Mark Johnson, who graduated from Wright State University with a Ph.D. in Engineering<\/a> in April, recently defended his doctoral dissertation, \u201cExperimental and Numerical Studies on the Projective Dye Visualization Velocimetry in a Squared Vertical Tube.\u201d<\/p>\n

He also presented the paper at the 2023 Dayton-Cincinnati Aerospace Science Symposium, where he took first place in the Art in Science category.<\/p>\n

Johnson said the goal of his research is to find a more accurate way to measure wall shear stress to more accurately predict how aneurysms rupture. He explained that wall shear stress is a tangential force, or a force that is parallel with the blood vessel wall, which causes damage. High shear stress is linked with inflammation to the aneurysm wall.<\/p>\n

In order to measure this, medical professionals must first be able to accurately calculate the velocity of the blood through the blood vessel.<\/p>\n

Johnson said medical professionals have tried calculating velocity through digital subtraction angiography imaging. Digital Subtraction Angiography imaging is a method for visualizing blood vessels that uses a contrast medium injected into the bloodstream and X-ray technology. Radiopaque structures such as bones are eliminated, or subtracted, digitally from the image, allowing for an accurate depiction of the blood vessels.<\/p>\n

\u201cThey found that the velocity they calculated had quite a bit of error associated with it,\u201d Johnson said. \u201cWe are trying to increase the accuracy of that. Dye visualization velocimetry is similar but allows us to use a light and dye set-up outside the body. The technique we developed uses machine learning to read the raw velocities acquired from dye visualization velocimetry and apply a correction to the values for improved accuracy.\u201d<\/p>\n

Johnson enrolled at Wright State as an undergraduate mechanical engineering student. He had received a scholarship for swimming and participated on Wright State\u2019s swimming and diving team for four years, serving as co-captain in his junior and senior years. He also served on the Student-Athlete Advisory Committee for two years.<\/p>\n

He was the recipient of the Raider Award in 2012 and was inducted into the Tau Beta Pi Engineering Honor Society.<\/p>\n

Johnson earned his Bachelor of Science in Mechanical Engineering<\/a> in 2015 and Master of Science in Mechanical Engineering<\/a> in 2016 from Wright State.<\/p>\n

After receiving his master\u2019s degree, he worked at the Wright State University\u2013Lake Campus for four years as a mechanical engineering lecturer, teaching courses in fluid dynamics and thermodynamics. After two years of teaching, he went back to pursue his Ph.D. in Engineering<\/a>.<\/p>\n

Johnson published nine journal papers during his master\u2019s and Ph.D. studies at Wright State and received an ASME scholarship award during his Ph.D. program.<\/p>\n

He works at GoHypersonic Inc. in Dayton.<\/p>\n","protected":false},"excerpt":{"rendered":"

Research paper by Mark Johnson, who graduated from Wright State with a Ph.D. in Engineering in April, was honored at the 2023 Dayton-Cincinnati Aerospace Science Symposium. Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":70,"featured_media":138582,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[722,733,743,2060,725,4269,715,18,2061],"tags":[],"class_list":["post-138576","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-academics","category-alumni","category-engineering-computer-science","category-graduate","category-home-news-sidebar","category-mechanical-and-materials-engineering","category-news","category-research","category-undergraduate"],"_links":{"self":[{"href":"https:\/\/webapp2.wright.edu\/web1\/newsroom\/wp-json\/wp\/v2\/posts\/138576","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/webapp2.wright.edu\/web1\/newsroom\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/webapp2.wright.edu\/web1\/newsroom\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/webapp2.wright.edu\/web1\/newsroom\/wp-json\/wp\/v2\/users\/70"}],"replies":[{"embeddable":true,"href":"https:\/\/webapp2.wright.edu\/web1\/newsroom\/wp-json\/wp\/v2\/comments?post=138576"}],"version-history":[{"count":6,"href":"https:\/\/webapp2.wright.edu\/web1\/newsroom\/wp-json\/wp\/v2\/posts\/138576\/revisions"}],"predecessor-version":[{"id":138594,"href":"https:\/\/webapp2.wright.edu\/web1\/newsroom\/wp-json\/wp\/v2\/posts\/138576\/revisions\/138594"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/webapp2.wright.edu\/web1\/newsroom\/wp-json\/wp\/v2\/media\/138582"}],"wp:attachment":[{"href":"https:\/\/webapp2.wright.edu\/web1\/newsroom\/wp-json\/wp\/v2\/media?parent=138576"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/webapp2.wright.edu\/web1\/newsroom\/wp-json\/wp\/v2\/categories?post=138576"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/webapp2.wright.edu\/web1\/newsroom\/wp-json\/wp\/v2\/tags?post=138576"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}