medical system, medical system for tracking lumen movements for fractional flow reserve (rff) simulation and method for tracking lumen movements This disclosure relates to a medical system that includes a medical instrument (102) configured for interventional positioning and a shape detection system (104) mounted on or within the medical instrument and configured to measure a medical instrument shape during interventional positioning. an imaging device (106) is mounted on or within the medical instrument and configured to image a lumen in which the imaging device is positioned. A recording module (140) is configured to record the shape of the medical instrument with a lumen image at a given time to reconstruct a three-dimensional lumen geometry to account for any movement. 1/1
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