Evaluation of an ultrasonic echo-tracking method for measurements of arterial wall movements in two dimensions

Cinthio, Magnus; Ahlgren, Åsa Rydén; Jansson, Tomas; Eriksson, Anders; Persson, Henry; Lindström, Kjell

doi:10.1109/tuffc.2005.1509788

Cited by 124 publications

(111 citation statements)

References 30 publications

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“…However, using modern ultrasound scanners, we observed that in large arteries of humans the inner layers of the arterial wall, the intimamedia complex, move not only in the radial direction but also in the longitudinal direction during the cardiac cycle (29). To study this phenomenon, we developed a new ultrasonic method for simultaneous high-resolution recording of both the longitudinal and the radial movements of the arterial wall noninvasively in vivo (30,10). Using this in-house developed ultrasonic method on large arteries in healthy humans, we (9) have shown that the longitudinal displacement of the intima-media complex during the cardiac cycle is of the same magnitude as the well-known diameter change.…”

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confidence: 99%

Longitudinal displacement and intramural shear strain of the porcine carotid artery undergo profound changes in response to catecholamines

Ahlgren

Cinthio

Steen

et al. 2012

American Journal of Physiology-Heart and Circulatory Physiology

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Ahlgren ÅR, Cinthio M, Steen S, Nilsson T, Sjöberg T, Persson HW, Lindström K. Longitudinal displacement and intramural shear strain of the porcine carotid artery undergo profound changes in response to catecholamines. Am J Physiol Heart Circ Physiol 302: H1102-H1115, 2012. First published December 23, 2011 doi:10.1152/ajpheart.00470.2011The effects of catecholamines on longitudinal displacements and intramural shear strain of the arterial wall are unexplored. Therefore, the common carotid artery of five anaesthetized pigs was investigated using an in-house developed noninvasive ultrasonic technique. The study protocol included intravenous infusion of low-dose epinephrine (␤-adrenoceptor activation), as well as intravenous boluses of norepinephrine (␣-adrenoceptor activation). Further, the effects of ␤-blockade (metoprolol) were studied. There were significant positive correlations between pulse pressure and longitudinal displacement of the intima-media complex (r ϭ 0.72; P Ͻ 0.001), as well as between pulse pressure and intramural shear strain (r ϭ 0.48; P Ͻ 0.001). Following administration of norepinephrine, the longitudinal displacement of the intimamedia complex and intramural shear strain profoundly increased (median 190%, range 102-296%, and median 141%, range 101-182%, respectively, compared with baseline), also when given during ␤-blockade (median 228%, range 133-266%, and median 158%, range 152-235%, respectively). During infusion of low-dose epinephrine, the longitudinal displacement of the intima-media complex and intramural shear strain decreased (median 88%, range 69 -122%, and median 69%, range 47-117%, respectively, compared with baseline). In conclusion, the present study shows, for the first time, that the longitudinal displacement and intramural shear strain of the porcine carotid artery undergo profound changes in response to catecholamines. Increase in longitudinal displacements seems to be strongly related to ␣-adrenoceptor activation. Thus metoprolol is insufficient to counteract a profound increase in longitudinal displacement and intramural shear strain following a surge of norepinephrine. longitudinal movements; epinephrine; norepinephrine; metoprolol; vascular mechanics; ultrasound CARDIOVASCULAR DISEASE IS a leading cause of morbidity and mortality in the industrialized countries. Mental stress is considered a risk factor for cardiovascular disease both acutely, following strong emotional stress, and chronically. The mechanisms behind this association still remain unclear.In cardiovascular research, the radial movement of the arterial wall, the diameter change, has been the subject of extensive research; measurement of the diameter change of arteries is now an established tool in cardiovascular research (2,21,26), forming the basis for estimation of arterial wall stiffness. Increased stiffness of large central arteries has been shown to be an independent risk factor for cardiovascular mortality (5, 19). In contrast, there are few studies on the longitudinal movement of the arterial wa...

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confidence: 99%

Longitudinal displacement and intramural shear strain of the porcine carotid artery undergo profound changes in response to catecholamines

Ahlgren

Cinthio

Steen

et al. 2012

American Journal of Physiology-Heart and Circulatory Physiology

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“…Some methods are based on optical flow, for example by Mailloux [10] and Friedland and Adams [11]. This method is also used for the measurement of longitudinal motion of the vessel wall [12,13]. Giachetti used the best features of the active contour and combined them with optical flow methods [14].…”

Section: Related Workmentioning

confidence: 99%

“…Two-dimensional tracking of the vessel wall movement can be also performed in the longitudinal section [12]. This examination might improve the ability to detect early abnormalities in vessel wall properties.…”

Section: Related Workmentioning

confidence: 99%

Towards an Optimal Interest Point Detector for Measurements in Ultrasound Images

Zukal¹,

Beneš²,

Číka³

et al. 2013

Measurement Science Review

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This paper focuses on the comparison of different interest point detectors and their utilization for measurements in ultrasound (US) images. Certain medical examinations are based on speckle tracking which strongly relies on features that can be reliably tracked frame to frame. Only significant features (interest points) resistant to noise and brightness changes within US images are suitable for accurate long-lasting tracking. We compare three interest point detectors -Harris-Laplace, Difference of Gaussian (DoG) and Fast Hessian -and identify the most suitable one for use in US images on the basis of an objective criterion. Repeatability rate is assumed to be an objective quality measure for comparison. We have measured repeatability in images corrupted by different types of noise (speckle noise, Gaussian noise) and for changes in brightness. The Harris-Laplace detector outperformed its competitors and seems to be a sound option when choosing a suitable interest point detector for US images. However, it has to be noted that Fast Hessian and DoG detectors achieved better results in terms of processing speed.

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“…The motion estimations of the proposed tracking scheme were compared to state-of-the-art low frame rate motion estimates as this is the gold standard when estimating the longitudinal wall movement of the arterial wall [26,28,[32][33][34][35][36]. The optimal frame rate using low frame rate imaging with a conventional linear scan scheme depends on, e.g., the signal-to-noise ratio, speckle decorrelation, out-of-plane movement, and biasing.…”

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confidence: 99%

“…However, the ultrasound scanner that was used on the phantom set-up is a research scanner without, e.g., virtual scan lines, whereas the scanner we used to perform state-of-the-art tracking in vivo is a commercial ultrasound scanner utilizing virtual scan lines and many other techniques that improve the image quality. Several studies have shown that the tracking performance is sufficient when using low frame rate imaging with a conventional linear scan scheme [26,28,[32][33][34][35][36]. The frame rate in these studies varies between 30-100 Hz.…”

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confidence: 99%

Iterative 2D Tissue Motion Tracking in Ultrafast Ultrasound Imaging

et al. 2018

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Abstract:In order to study longitudinal movement and intramural shearing of the arterial wall with a Lagrangian viewpoint using ultrafast ultrasound imaging, a new tracking scheme is required. We propose the use of an iterative tracking scheme based on temporary down-sampling of the frame-rate, anteroposterior tracking, and unbiased block-matching using two kernels per position estimate. The tracking scheme was evaluated on phantom B-mode cine loops and considered both velocity and displacement for a range of down-sampling factors (k = 1-128) at the start of the iterations. The cine loops had a frame rate of 1300-1500 Hz and were beamformed using delay-and-sum. The evaluation on phantom showed that both the mean estimation errors and the standard deviations decreased with an increasing initial down-sampling factor, while they increased with an increased velocity or larger pitch. A limited in vivo study shows that the major pattern of movement corresponds well with state-of-the-art low frame rate motion estimates, indicating that the proposed tracking scheme could enable the study of longitudinal movement of the intima-media complex using ultrafast ultrasound imaging, and is one step towards estimating the propagation velocity of the longitudinal movement of the arterial wall.

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Evaluation of an ultrasonic echo-tracking method for measurements of arterial wall movements in two dimensions

Cited by 124 publications

References 30 publications

Longitudinal displacement and intramural shear strain of the porcine carotid artery undergo profound changes in response to catecholamines

Longitudinal displacement and intramural shear strain of the porcine carotid artery undergo profound changes in response to catecholamines

Towards an Optimal Interest Point Detector for Measurements in Ultrasound Images

Iterative 2D Tissue Motion Tracking in Ultrafast Ultrasound Imaging

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