Method and apparatus for applying synthetic aperture focusing techniques to a catheter based system for high frequency ultrasound imaging of small vessels
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United States of America Patent
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Feb 16, 1993
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N/A
app pub date -
Dec 5, 1991
filing date -
Dec 5, 1991
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Abstract
A catheter based ultrasound imaging system is disclosed which is capable of providing images of coronary vessels at frequencies near 50 MHz. The catheter based system implements a Synthetic Aperture Focusing Technique (SAFT) by scanning through a miniature ultrasound transducer array to sequentially select and fully multiplex a subset of array elements to operate as a sub-aperture of the total synthetic aperture on each firing; thus reducing the number of required catheter interconnections. Each synthetic aperture array is dynamically and retrospectively focused to accommodate precision imaging at high frequency without conventional signal to noise losses.
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