Key result
Ultrafast ultrasound at ~1300 fps accurately measures carotid arterial wall motion and regional pulse wave velocity.
Why the study?
A high temporal resolution method is required to measure arterial wall motion accurately for regional pulse wave velocity assessment, which is important for diagnosing localized atherosclerosis.
High-frame-rate plane-wave ultrasound is a feasible method for measuring regional pulse wave velocity in short arterial segments, which may aid in the localized diagnosis of atherosclerosis.
Should not yet change clinical practice; leaves open whether regional PWV improves risk stratification.
The regional elastic property of the arterial wall is a useful marker for the diagnosis of atherosclerosis because an atherosclerotic lesion is formed locally. Pulse wave velocity is a noninvasive index for the evaluation of the elasticity of the arterial wall. However, a high temporal resolution is required for the measurement of the arterial wall motion because the pulse wave propagates along the artery at several meters per second. In the present study, the arterial wall motion was measured at a high temporal resolution at 1302 frames per second (fps) using plane-wave ultrafast ultrasound. Also, a method of estimating the temporal and spatial frequencies of the pulse wave was developed for the determination of the regional pulse wave velocity in a short segment of about 20 mm along the artery. The accuracy of the proposed method was evaluated by simulation experiments and its feasibility was examined in the in vivo measurement of the human carotid artery.
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Hideyuki Hasegawa (2018) studied Atherosclerosis. Plane-wave ultrafast ultrasound and frequency estimation method was evaluated on Accuracy and feasibility of regional pulse wave velocity measurement. A novel method using plane-wave ultrafast ultrasound at 1302 frames per second successfully measured arterial wall motion and estimated regional pulse wave velocity in the human carotid artery.
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