Apparatus and method for determining at least one individual fluid dynamic characteristic value of a stenosis in a plurality of serial stenoses having vessel segment

The invention relates to a device (1) and a method for determining at least one individual fluid dynamic characteristic value (25) of a stricture (14, 15) in a plurality of serial stenoses (14, 15) comprising vascular segment (2), from an angiography recording device (5) angiographic image data (6) received from the vessel segment (2), by an analysis device (10) on the basis of the angiographic image data (6) determines geometrical data (a, D) of said vessel segment (2) and to a segment model (11) are summarized. The invention provides that by a partition means (13) in the segment model (11) comprises at least one division point (18, 18 ') extending between two of the stenosis (14, 15) is determined and the segment model (11) the at least one division point (18, 18 ') each in Subsegmentmodelle (16, 17) is divided and a simulation means (21) for at least one of the Subsegmentmodelle (16, 17) on the basis of respective geometry data (a, D) of the Subsegmentmodells ( 16, 17) of the respective fluid-dynamic parameter (25) is determined.