Determination of clinical characteristic parameter using combination of different recording modalities

Abstract

The invention relates to determination of a clinical characteristic parameter using a combination of different recording modalities and to a method for determining a clinical characteristic parameterof a body vessel segment. The method comprises a) providing (1), to a computing device, a three-dimensional reconstruction of a body vessel containing the body vessel segment; b) providing (2), to a computing device, segmented angiography recording of the body vessel segment; c) by the computing device, extracting (4) at least one global feature of the body vessel from the three-dimensional reconstruction; d) by the computing device, extracting (5) at least one local feature of the body vessel segment from the angiography recording; and e) determining (8) the clinical characteristic parameterof the body vessel segment according to the extracted local feature and the extracted global feature in order to compute the clinical characteristic parameter of the body vessel segment as accuratelyas possible in a case where the radiation load of a patient is the lowest.

Description

technical field [0001] The invention relates to a method for determining clinical characteristic variables of body vessel segments. The present invention also relates to an inspection system for determining clinical characteristic parameters of body blood vessel segments, comprising: medical imaging equipment for providing three-dimensional reconstruction of body blood vessels using body blood vessel segments; angiography equipment for providing body blood vessel segments a segmented angiographic record; and a computing device, which may be coupled with the medical imaging device and the angiographic device. Background technique [0002] The established clinical characteristic variable is the fractional flow reserve (FFR), which can be measured, for example, using a pressure line (Druckdraht). The pressure line passes through the stenosis of the body vessel or body vessel segment and determines the pressure distal to the stenosis there. To calculate the fractional flow res...

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Problems solved by technology

Small mistakes here can have big consequences

Estimating blood flow via contrast agent dynamics in angiographic FFR methods is also cumbersome and difficult

A further disadvantage is that the angiographic FFR method does not provide information on the state of the myocardial mass, which is important, for example, in order to be able to recognize possible pre-existing injuries and take them into account during treatment

Furthermore, geometric information of the entire vascular tree is extremely difficult to obtain, also due to the relatively small detectors typically used in angiography

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