Intracardiac catheter 2-D arrays on a silicon substrate.
The design, fabrication, and characterization of a 7 MHz, two-dimensional (2-D) array transducer built on a silicon substrate is described. The array fits inside a 9-French (2.9 mm O.D.) catheter for use in real-time intracardiac volumetric imaging. The -6 dB fractional bandwidth of the transducer is 30%, the 50 ohm pitch-catch insertion loss is 78 dB, and the interelement crosstalk is -25 dB. Real-time volumetric images in phantoms and in-vitro images of a sheep heart have been acquired yielding measured spatial resolution of 2 mm at a depth of 1 cm. The cardiac structures imaged include ventricular chambers, interventricular septum, mitral and tricuspid valves and real-time 3-D rendered volumes of the tricuspid valve in the open and closed position.
Lee
Warren
W
Department of Biomedical Engineering, Duke University, Durham, NC 27708-0281, USA. warren.lee@duke.edu
Smith
Stephen W
SW
D000818:Animals; D006328:Cardiac Catheterization / Q000295:instrumentation*; D002306:Cardiac Volume; D004452:Echocardiography / Q000295:instrumentation*; D004867:Equipment Design; D008955:Models, Cardiovascular; D019047:Phantoms, Imaging; D012756:Sheep; D012825:Silicon; D014159:Transducers
D012825:Silicon