Systems And Methods Of Identifying Vessel Attributes Using Extravascular Images

A system for identifying attributes of a blood vessel, the system comprising:

• one or more memories for storing images of a vessel;
• and
• and one or more processors configured to:
• capture a plurality of extravascular images of a vessel during a pullback of an intravascular imaging probe having a defined pullback length along a first region of the vessel;
• detect locations of one or more markers in the plurality of extravascular images;
• correlate the first region of the vessel represented in the plurality of extravascular images with the pullback length based on the location of the one or more markers in the plurality of extravascular images;
• and
• determine a size of a second region of the vessel represented in the plurality of extravascular images based the correlation of the first region of the vessel represented in the plurality of extravascular images with the pullback length.

A method for identifying attributes of a vessel, the method comprising:

• receiving, by one or more processors, a plurality of extravascular images captured at a plurality of angulations relative to a patient;
• generating, by the one or more processors, a three-dimensional model of a vessel based on the plurality of extravascular images;
• identifying, by the one or more processors, locations within the vessel for which an intravascular pullback procedure will be conducted;
• estimating, by the one or more processors, a size of the vessel at one or more regions not included within the identified locations, wherein the estimation is based on the three-dimensional model;
• and
• computing a virtual flow reserve (VFR) of the vessel based on the estimated size of the vessel.