Automatic quantitative vessel analysis at the location of an automatically-detected tool

Apparatus, comprising:

• a tool configured to be placed inside a blood vessel of a subject;
• an extraluminal image-acquisition device configured to acquire an image of the blood vessel, while the tool is inside the blood vessel;
• a display;
• and
• at least one processor, comprising:
• image-receiving functionality configured to receive the image into the processor;
• tool-detection functionality configured to automatically detect a location of a portion of the tool, with respect to the blood vessel, in the image;
• target-designation functionality configured, in response to detecting the location of the portion of the tool, to automatically designate a target portion of the blood vessel that is in a vicinity of the portion of the tool;
• quantitative-vessel-analysis functionality configured to perform quantitative vessel analysis on the target portion of the blood vessel, using the image;
• and
• display-driving functionality configured to drive the display to display an output in response to the quantitative vessel analysis.