Computational assessment of the fractional flow reserve from intravascular ultrasound and coronary angiography data: a pilot study
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Published on: April 13, 2015
Insights
A new computational method calculates fractional flow reserve (FFR) using 3D models from IVUS and angiography. This approach avoids invasive pressure wires and hyperemia, offering a feasible alternative for assessing coronary artery lesions.
Area of Science:
- Cardiology
- Medical Imaging
- Computational Fluid Dynamics
Background:
- Cardiovascular disease is a leading global cause of death.
- Accurate diagnosis of coronary artery lesions is clinically crucial.
- Fractional flow reserve (FFR) assesses lesion severity but requires invasive methods.
Purpose of the Study:
- To present a computational method for calculating FFR.
- To avoid the need for pressure wires and hyperemia induction.
- To utilize intravascular ultrasound (IVUS) and biplane angiography for FFR assessment.
Main Methods:
- Three-dimensional (3D) coronary artery reconstruction from IVUS and angiography.
- Computational fluid dynamics (CFD) for simulating blood flow.
- Measurement of volumetric flow rate from angiographic sequences.
Main Results:
- High correlation (r=0.85) between simulated and invasively measured FFR values.
- Good agreement (mean difference=0.002) in 7 patient cases.
- Demonstrated feasibility of non-invasive FFR calculation.
Conclusions:
- Computational FFR assessment is feasible using 3D models derived from IVUS and angiography.
- This method offers a non-invasive alternative to traditional FFR measurements.
- The technique holds potential for improved clinical diagnosis of coronary artery disease.
Abstract:
Cardiovascular disease is one of the primary causes of morbidity and mortality around the globe. Thus, the diagnosis of critical lesions in coronary arteries is of utmost importance in clinical practice. One useful and efficient method to assess the functional severity of one or multiple lesions in a coronary artery is the calculation of the fractional flow reserve (FFR). In the current work, we present a method which allows the calculation of the FFR value computationally, without the use of a pressure wire and the induction of hyperemia, using intravascular ultrasound (IVUS) and biplane angiography images for three-dimensional (3D) coronary artery reconstruction and measurements of the volumetric flow rate derived from angiographic sequences. The simulated FFR values were compared to the invasively measured FFR values in 7 cases, presenting high correlation (r=0.85) and good agreement (mean difference=0.002). FFR assessment without employing a pressure wire and the induction of hyperemia is feasible using 3D reconstructed coronary artery models from angiographic and IVUS data coupled with computational fluid dynamics.
