Importance

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Abstract

A focused ultrasound beam is created using a probe having a curved linear array. The curved linear array is asymmetric and two dimensional comprising individual parallel circumferential, linear sub-arrays disposed at a distal end of a probe. A first sub-array is disposed proximate a distal end and a final sub-array is disposed proximate a proximal end with subsequent sub-arrays disposed between the first and final array. In practice, the first sub-array transmits a set of pulses of ultrasound radiation for a period of time then an adjacent array transmits a set of pulses of ultrasound radiation after a lag. The transmissions by each sub-array continue with a lag between each array transmission until the final sub-array transmits a final set of pulses of ultrasound radiation. The pulse is generated by each transmission is steered and focused depending on the phases and amplitudes of the pulses of ultrasound radiation transmitted by the full set of elements in the transmitting sub-arrays. The set of multiple pulses permits interrogating individual voxels in a scanned volume from different directions.

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First Claim