Stent planning systems and methods using vessel representation obtained via intravascular probe by determining stent effectiveness score and fractional flow reserve

A system for automated display of stent planning information comprising:

• an electronic memory device;
• and
• one or more processors in communication with the electronic memory device, wherein the memory comprises instructions executable by the one or more processors to cause the one or more processors to:
• compute a set of lumen cross-sectional distance-based values from intravascular data generated using an intravascular probe pulled back through a blood vessel;
• identify a set of local maxima from the set of lumen cross-sectional distance-based values, wherein one or more of the local maxima are correlated with potential stent landing zones;
• determine one or more frames in the intravascular data that correspond to one or more of the local maxima;
• determine, in connection with the set of local maxima, pairs of candidate stent landing zones by identifying one or more frames disposed at a boundary of a search window, wherein a size of search window is a length of one or more stents;
• generate, for each pair of candidate landing zones, a stent effectiveness score (SES) that results from placement of a virtual stent of a given distance and length at each pair of candidate landing zones, wherein generating the SES for each pair of candidate landing zones comprises:
• calculating, by the one or more processors, a first virtual fractional flow reserve (VFR) for the vessel prior to placing the virtual stent;
• calculating a second Virtual Fractional Reserve for the vessel subsequent to placing the virtual stent;
• determining a difference, by the one or more processors, between the first VFR and the second VFR to obtain a change in VFR in response to stent placement;
• and
• dividing, by the one or more processors, the change in VFR by a value based on the length of the virtual stent;
• and
• providing a display of at least one indication of a virtual stent defined by landing zones determined based on the stent effectiveness score, as well as an indication of an effect of the virtual stent.