【摘 要】
：
Background,Motivation and Objective Cardiac ablation is increasingly used to treat atrial fibrillation.Although it is effective,the nonuniform thickness of the left atrial wall and the variable thickn
【机 构】
：
Electrical Engineering,Eindhoven University of Technology,Eindhoven,Netherlands
论文部分内容阅读
Background,Motivation and Objective Cardiac ablation is increasingly used to treat atrial fibrillation.Although it is effective,the nonuniform thickness of the left atrial wall and the variable thickness of the fatty layer between the wall and the esophagus are risk factors.The potential ability of distinguishing fat and muscle tissue types with an intra cardiac ultrasound probe would allow risk assessment with respect to esophageal injury.The acoustical coefficient of nonlinearity β is a particularly suitable feature for discriminating the tissues relevant to this application,since fatty tissues are known to have a high coefficient of nonlinearity.However,β imaging in echo mode is a challenging task.In particular,previous methods fail to address spatially varying backscattering coefficient and absorption and/or the methods require a special measurement setup or transducer,posing serious limitations for translation into clinical applications.
其他文献
Background, Motivation and Objective Ultrafast and 2D intracardiac blood flow imaging could enhance the diagnosis of congenital heart disorders in newborn patients since current clinical ultrasound mo
Background, Motivation and Objective The cardiovascular blood flow is very complex as it propagates in all three dimensions, where short-lived vortices can arise and vanish within 100-200 ms. Thus, to
Background, Motivation and Objective 3-D imaging of blood flow based on 2-D ultrasound scanning and position sensor information can be used to portray clinical information not currently available in v
Background,Motivation and Objective Analysis of the phase difference between ultrasound signals received by pairs of transducer elements yields a robust estimate of lateral and axial displacements bet
Background,Motivation and Objective Integrating the optoacoustic(OA) and pulse-echo(PE) ultrasound images is essential to characterize the optical and acoustic properties of the tissue and lesion.The
Background,Motivation and Objective As a result of the Warburg effect,dysregulated cellular pH is considered an emerging hallmark of cancer.Thus,The ability to noninvasively probe acidity at a cellula
Background,Motivation and Objective Acoustic waves induced by megavoltage photon beam from a clinical linear accelerator(Linac) could provide location and dosimetric information of actual delivered ra
Background,Motivation and Objective We have recently performed a study where what we term the average phase derivative(APD) of the RF data was successfully used to assess carotid plaque vulnerability.
Background,Motivation and Objective Fiber architecture is of major interest in the cardiac function.Recently,Backscatter Tensor Imaging(BTI),a new imaging technique enabled the detection of fiber orga
Background,Motivation and Objective The feasibility of noninvasively measuring regional carotid artery stiffness by way of the stress-strain relationship was recently demonstrated in young normal adul