{"id":73,"date":"2021-04-05T11:38:24","date_gmt":"2021-04-05T15:38:24","guid":{"rendered":"https:\/\/seniordesign.digitalscholar.rochester.edu\/bme2021\/?p=73"},"modified":"2022-04-13T10:07:50","modified_gmt":"2022-04-13T14:07:50","slug":"catheter-detection-tracking-and-virtual-image-reconstruction","status":"publish","type":"post","link":"https:\/\/www.hajim.rochester.edu\/senior-design-day\/catheter-detection-tracking-and-virtual-image-reconstruction\/","title":{"rendered":"Catheter Detection, Tracking, and Virtual Image Reconstruction"},"content":{"rendered":"\n
PROBLEM STATEMENT<\/a><\/h6>\n\n\n\n
NEEDS\/WANTS SPECIFICATIONS<\/a><\/h6>\n\n\n\n
PROTOTYPING PROCESS<\/a><\/h6>\n\n\n\n
TESTING RESULTS<\/a><\/h6>\n\n\n\n
CUSTOMER FEEDBACK<\/a><\/h6>\n\n\n\n
FUTURE WORK<\/a><\/h6>\n\n\n\n
OUR DESIGN TEAM<\/a><\/h6>\n\n\n\n

Problem Statement<\/h2>\n\n\n\n

Endovascular coiling is a common surgical procedure used to prevent aneurysm rupture. This involves the use of a catheter to feed microwires into an aneurysm. The presence of many radio-dense materials such as catheters and coiling wires results in the surgeon having poor visualization of the catheter tip during surgery. The overall goal of this project is to track the catheter tip by estimating how far it has moved into occlusion. Our localization goal will be accomplished by designing a catheter with markers and an image processing system that is able to provide the surgeon with information that may not be visible with occlusions.<\/strong><\/h2>\n\n\n\n
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Preliminary Design Drawings<\/figcaption><\/figure>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n

Needs\/Wants Specifications<\/h2>\n\n\n\n

These are the identified needs and wants of our customers in the design of the catheter and image processing system. These needs and wants, once identified, will also have a corresponding metric that can be measured and a value or range of values that when reached we will consider that need or want to be met.<\/strong><\/h2>\n\n\n\n
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Needs<\/strong><\/summary>
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Customer Requirement<\/td>Translated Metric<\/td>Possible Target<\/td><\/tr>
Accurately determine tip position<\/td>95% Confidence (p<0.05)<\/td>1 mm<\/td><\/tr>
Image covers the full clinical area<\/td>Field of View<\/td>28 cm2<\/sup><\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/details><\/div>\n\n\n\n
Wants<\/strong><\/summary>
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Customer Requirement<\/td>Translated Metric<\/td>Possible Target<\/td><\/tr>
Real-time<\/td>Latency<\/td>200 – 400 ms
1 – 2  second (analysis of single photo)<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/details><\/div>\n<\/div>\n\n\n\n

Prototyping Process<\/h2>\n\n\n\n

Our prototyping process involved both physical and computational designs that will ultimately interact with another to create the entire catheter imaging system prototype. <\/strong> The goal of our physical prototype portion of our system was to build a system that best represents an endovascular coiling procedure in which an occlusion is present and is blocking the catheter tip from camera view<\/strong>. Images of the physical prototype were then taken and analyzed computationally to provide a real-time estimate of the actual location of the occluded catheter tip. <\/h2>\n\n\n\n
Physical Prototype Setup<\/strong><\/em><\/h5>\n\n\n\n

3-D Printed Aneurysm Phantom<\/strong><\/em><\/mark><\/p>\n\n\n\n

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We first designed and 3D-printed an aneurysm phantom that was best suited for our system: a cross section with stabilizers. As seen below, it was designed with CAD then printed and ready for use in our physical system. <\/strong><\/h2>\n<\/div><\/div>\n\n\n\n