Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation
Patent
1998-03-24
1999-11-02
Jaworski, Francis J.
Surgery
Diagnostic testing
Detecting nuclear, electromagnetic, or ultrasonic radiation
A61B 800
Patent
active
059760893
ABSTRACT:
The present invention is an ultrasound apparatus and method for creating high quality two- or three-dimensional images of a region of interest. The imaging apparatus includes a transmit beamformer for activating a transducer array to emit ultrasound beams along multiple transmit scan lines distributed over a selected scan pattern. Each transmitted ultrasound beam generates several echos that are detected by a receive transducer array connected to a receive beamformer. The receive beamformer synthesizes several receive beams in response to each transmit beam. Each of the synthesized receive beams is steered over the selected pattern in a way that a round-trip beam, corresponding to the transmit beam and the steered receive beam, has a selected round-trip orientation. To arrange the round-trip beams over a predetermined spacing, the receive beams are oversteered (i.e., overcompensated) because the round-trip beams also depend on the orientations of the transmit beams. An interpolator receives two round-trip beams that have substantially the same round-trip orientation and are synthesized by in response to two transmit beams emitted along two neighboring transmit scan lines. The interpolator interpolates the two round-trip beams to form an image signal of a selected beam profile oriented substantially along the round-trip orientation of the two beams. An image generator forms an image of the examined region based on the image signals.
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Hewlett--Packard Company
Jaworski Francis J.
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