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AssigneeFujifilm Sonosite, Inc.
InventorsNicholas Christopher Chaggares, Guofeng Pang, Desmond Hirson
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A dual frequency ultrasound transducer includes a high frequency ultrasound array and a low frequency transducer positioned behind or proximal to the high frequency ultrasound array. In one embodiment, a dampening material is positioned between a rear surface of the high frequency array and the a front surface of the low frequency array. The dampening preferably is high absorbing of signals at the frequency of the high frequency array but passes signals at the frequency of the low frequency transducer with little attenuation. In additional, or alternatively, the low frequency can angled with respect to the plane of the high frequency transducer to reduce inter-stack multipath reflections. Beamforming delays compensate for the differences in physical distances between the elements of the low frequency transducer and the plane of the high frequency transducer.
A dual frequency ultrasound transducer having a low frequency (LF) ultrasound transducer positioned behind a high frequency (HF) transducer array such that they both share a common acoustic axis and including a dampening layer disposed between a front face of the low frequency transducer and a rear face of the high frequency transducer array for reducing inter-stack multipath reflections, wherein the dampening layer has attenuation properties that increase non-linearly with increasing frequency.
A dual frequency array comprising:
A dual frequency ultrasound array comprising:
A dual frequency array comprising:
A dual frequency array comprising:
Dependencies are inferred from the claim text.