Abstract
A preliminary comparative measurement between particle imaging velocimetry (PIV) and laser speckle contrast analysis (LASCA) to study pulsatile flow using ventricular assist device in a patient-specific carotid artery phantom is reported. These full-field optical techniques have both been used to study flow and extract complementary parameters. We use the high spatial resolution of PIV to generate a full velocity map of the flow field and the high temporal resolution of LASCA to extract the detailed frequency spectrum of the fluid pulses. Using this combination of techniques a complete study of complex pulsatile flow in an intricate flow network can be studied.
Highlights
The measurement and monitoring of heart rate becomes imperative in any medical emergency or clinical situation
Several patients suffering from arrhythmia or eventual heart failure will be treated by Cardiac Resynchronization Therapy (CRT)
We report an initial comparative study of pulsatile flow in a carotid artery phantom using the full field techniques of particle imaging velocimetry (PIV) and laser speckle contrast analysis (LASCA)
Summary
The measurement and monitoring of heart rate becomes imperative in any medical emergency or clinical situation. This is an ultrasound technique which overcomes some of the Doppler ultrasound limitation such as angle dependence This method is based on detecting the contrast agent micro bubbles and helps in understanding, for instance, the left ventricular dysfunction, by giving a detailed hemodynamic study [2, 3]. Another technique for in-vivo analysis is transcranial Doppler sonography [4]. Heart pulsation creates a periodic variation of waves whose time analysis provides information over the heart valve dynamics These studies help in diagnosing any variation in blood vessel stiffness caused by cardiac disease. In order to increase the understanding of flow variations at each cardiac pulse, different moments in the cardiac pulse cycle were analyzed for various regions in the carotid artery phantom
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