Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation
Patent
1998-03-13
2000-01-11
Lateef, Marvin M.
Surgery
Diagnostic testing
Detecting nuclear, electromagnetic, or ultrasonic radiation
600447, 600459, 128916, A61B 800
Patent
active
060130326
ABSTRACT:
An ultrasound imaging system includes a two-dimensional array of ultrasound transducer elements that define multiple subarrays, a transmitter for transmitting ultrasound energy into a region of interest with transmit elements of the array, a subarray processor and a phase shift network associated with each of the subarrays, a primary beamformer and an image generating circuit. Each subarray processor includes receive circuitry responsive to transducer signals generated by receive elements of the associated subarray for providing first and second subarray signals. The first subarray signal comprises a sum of first component signals, and the second subarray signal comprises a sum of second component signals. The first and second component signals are derived from the respective transducer signals. The phase shift network phase shifts and combines the first and second subarray signals to provide a phase shifted subarray signal. The primary beamformer delays each of the phase shifted subarray signals by delays that are individually controlled and provides delayed subarray signals which are summed to provide a beamformer signal.
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Hewlett--Packard Company
Imam Ali M.
Lateef Marvin M.
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