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Intracardiac echocardiography (ICE) is routinely used in many interventional procedures in cardiology. In these procedures ICE catheter is positioned with fluoroscopy guidance, which can be harmful due to ionizing X-ray radiation exposure. Positioning the ICE catheter using an interventional magnetic resonance imaging (MRI) system would enable procedures that are free of ionizing radiation, and complement...
Image quality of volumetric intracardiac echocardiography (ICE) catheters is severely limited, especially in the elevation direction, restricted by the catheter diameter. A natural idea is to design a foldable transducer with multiple panes which can be expanded in the heart mechanically to form a large and symmetric 2-D aperture 2–3 times the size of the catheter diameter. Here, the imaging performance...
This paper presents an catheter prototype developed for testing feasibility of intracardiac echography (ICE) in a magnetic resonance imaging (MRI) system. The presented catheter includes a capacitive micromachined ultrasonic transducer (CMUT) array at its tip, a 1m long catheter body with μ-coax cable based connections to a handle. The handle contains ultrasound pulser circuitry to generate the excitation...
3-D imaging ICE catheters with large element counts present design challenges in achieving simultaneous data readout from all elements while significantly reducing cable count for a small catheter diameter. Current approaches such as microbeamformer techniques tend to rely on area and power hungry circuits, making them undesirable for ICE catheters. In this paper, a system which uses are an efficient...
In ultrasound imaging catheter applications, gathering the data from multi-element transducer arrays is difficult as there is a restriction on cable count due to the diameter of the catheter. In such applications, CMUT-on-CMOS technology allows for 2D arrays with many elements to be designed and bonded directly onto CMOS circuitry. This allows for complex electronics to be placed at the tip of the...
Designing Intracardiac Echocardiography (ICE) imaging catheters using 2D arrays with large number of elements is extremely challenging with standard interconnect and transducer technology. Using microbeamformers inside the catheter reduces the number of cables; however it requires complex front-end electronics which consumes considerable amount of real estate. By using the CMUT-on-CMOS technology,...
Forward-Looking (FL) catheter based imaging systems are highly desirable for guiding interventions in intravascular ultrasound (IVUS) and intracardiac echocardiography (ICE) applications. One of the main challenges in the array based FL-IVUS systems is the large channel count which results in increased system complexity. Synthetic phased array processing with reduced firing count simplifies the front-end...
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