Ultrasonic displacement and strain imaging of coronary arteries with a catheter array

Shapo, B.M.; Crowe, J.R.; Skovoroda, A.R.; Eberle, M.J.; Cohn, N.A.; O’Donnell, Matthew

doi:10.1109/ultsym.1995.495841

Cited by 4 publications

(5 citation statements)

References 13 publications

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“…In this way, expansion of the aorta ex vivo could be mimicked since radial displacement dominated the deformation pattern, whereas circumferential displacement was negligible. Due to the simulated axisymmetric shape of the aorta, the radial displacement u r decreased toward the outer border with 1/r when the radius r of the position in the grid was larger than r b [26]. When the radius of the position in the grid was smaller than r b , the displacements decreased proportional to r .…”

Section: A Simulation Designmentioning

confidence: 97%

Multiperspective Bistatic Ultrasound Imaging and Elastography of the Ex Vivo Abdominal Aorta

Hal

Hoop

Muller

et al. 2022

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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Knowledge of aneurysm geometry and local mechanical wall parameters using ultrasound (US) can contribute to a better prediction of rupture risk in abdominal aortic aneurysms (AAAs). However, aortic strain imaging using conventional US is limited by the lateral lumen-wall contrast and resolution. In this study, ultrafast multiperspective bistatic (MP BS) imaging is used to improve aortic US, in which two curved array transducers receive simultaneously on each transmit event. The advantage of such bistatic US imaging on both image quality and strain estimations was investigated by comparing it to single-perspective monostatic (SP MS) and MP monostatic (MP MS) imaging, i.e., alternately transmitting and receiving with either transducer. Experimental strain imaging was performed in US simulations and in an experimental study on porcine aortas. Different compounding strategies were tested to retrieve the most useful information from each received US signal. Finally, apart from the conventional sector grid in curved array US imaging, a polar grid with respect to the vessel's local coordinate system is introduced. This new reconstruction method demonstrated improved displacement estimations in aortic US. The US simulations showed increased strain estimation accuracy using MP BS imaging bistatic imaging compared to MP MS imaging, with a decrease in the average relative error between 41% and 84% in vessel wall regions between transducers. In the experimental results, the mean image contrast-to-noise ratio was improved by up to 8 dB in the vessel wall regions between transducers. This resulted in an increased mean elastographic signalto-noise ratio by about 15 dB in radial strain and 6 dB in circumferential strain.

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Section: A Simulation Designmentioning

confidence: 97%

Multiperspective Bistatic Ultrasound Imaging and Elastography of the Ex Vivo Abdominal Aorta

Hal

Hoop

Muller

et al. 2022

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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“…Speckle displacements are estimated from correlation lags corresponding to the maximum correlation coefficient between the frames. In the past decade, elasticity imaging based on speckle tracking has been shown to be a great potential for clinical uses (Lerner et al 1988;Tristam et al 1988;Bertrand et al 1989;Yamakoshi et al 1990;Sarvazyan et al 1990;O'Donnell et al 1991;Ophir et al 1991;Ryan et al 1992;Gao et al 1996;Bilgen et al 1996), where several groups have also explored high spatial resolution ultrasound speckle tracking systems for intravascular applications (O'Donnell et al 1991;Ryan et al 1992;Shapo et al 1995;Emelianov 1998a;van der Steen et al 1998;de Korte et al 1998;Choi et al 1999;Rekhter et al 1999). UEI has also been successfully applied to other in-vivo applications.…”

Section: Introductionmentioning

confidence: 99%

Noninvasive Ultrasound Elasticity Imaging (UEI) of Crohn's Disease: Animal Model

Kim

Johnson

Jia

et al. 2008

Ultrasound in Medicine & Biology

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Inflammation occurs in episodic flares in Crohn's disease, which are part of the waxing and waning course of the disease. Healing between flares allows the intestine to reconstitute its epithelium, but this healing results in the deposition of fibrotic scar tissue as part of the healing process. Repeated cycles of flares and healing often lead to clinically significant fibrosis and stenosis of the intestine. Patients are treated empirically with steroids, with their many side effects, in the hope that they will respond. Many patients would be better treated with surgery if we could identify which patients truly have intestinal fibrosis. Ultrasound elasticity imaging (UEI) offers the potential to radically improve the diagnosis and management of local tissue elastic property, particularly intestinal fibrosis. This method allows complete characterization of local intestine tissue with high spatial resolution. The feasibility of UEI on Crohn's disease is demonstrated by directly applying this technique to an animal model of inflammatory bowel disease (IBD). Five female Lewis rats (150-180g) were prepared with phosphate buffered solution (PBS) as a control group and six were prepared with repeated intrarectal administration of trinitrobenzenesulfonic acid (TNBS) as a disease group. Preliminary strain measurements differentiate the diseased colons from the normal colons (p < 0.0002) and compared well with direct mechanical measurements and histology (p < 0.0005). UEI provides a simple and accurate assessment of local severity of fibrosis. The preliminary results on an animal model also suggest the feasibility of translating this imaging technique directly to human subjects for both diagnosis and monitoring.

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“…[23][24][25] The 64 element imaging array balloon, the artery expands while cross-sectional balloon. As the pressure increases inside the images of the artery are collected by the imaging array.…”

Section: Pressurized Intraluminal Speckle Trackingmentioning

confidence: 99%

“…As discussed above, catheter motion corrupts tracking measurements, and therefore B-scans (as well as displacements balloon. This correction is described in [23]. …”

Section: Rectangular Coordinatesmentioning

confidence: 99%

Catheter arrays: can intravascular ultrasound make a difference in managing coronary artery disease

O’Donnell

Eberle²,

Stephens³

et al.

1997 IEEE Ultrasonics Symposium Proceedings. An International Symposium (Cat. No.97CH36118)

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P Abstract -There are two primary reasons why intravascular ultrasound has not yet reached its potential for interventional cardiology. First, image quality has been poor given the possible operating frequencies and numerical apertures. And second, there is no application where routine imaging critically guides an intervention. Over the last 5 years, the Biomedical Ultrasonics Lab at the University of Michigan and Endosonics address these issues. Recent progress strongly Corporation have worked together to directly First, image quality has been greatly improved suggests that both limitations can be overcome. using a 64 element, high efficiency, ceramic with a real-time, synthetic phased array system piezoelectric transducer operating at 20 MHz.The array is mounted on the surface of a 1.2 mm diameter catheter appropriate for intracoronary imaging. Second, using this high performance system, three new applications of intraluminal ultrasound have been investigated: real-time color flow imaging, in situ elasticity measurements, and stent deployment monitoring. In this paper, the results of this work are reviewed.

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Ultrasonic displacement and strain imaging of coronary arteries with a catheter array

Cited by 4 publications

References 13 publications

Multiperspective Bistatic Ultrasound Imaging and Elastography of the Ex Vivo Abdominal Aorta

Multiperspective Bistatic Ultrasound Imaging and Elastography of the Ex Vivo Abdominal Aorta

Noninvasive Ultrasound Elasticity Imaging (UEI) of Crohn's Disease: Animal Model

Catheter arrays: can intravascular ultrasound make a difference in managing coronary artery disease

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