Ultrasonic imaging system and improved signal processor therefor
OwnerWilliam M. Knosplerinventor
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Abstract
In an ultrasonic imaging system, a signal processor is provided which converts the portions of the received signal representing sonic reflections to more closely resemble the acoustic impedance changes which generated the reflections. The signal processor differentiates the received signal after demodulation and the differentiated signal is added to the received demodulated signal delayed by one-half cycle of the ripple frequency of the ultrasonic pulses.
Claims11
In an ultrasonic scanning device having means to apply ultrasonic pulses to a subject to scan impedance changes in said subject and to detect the resulting sonic reflections and generate electrical signals from said reflections and a receiver to demodulate the received signals, the improvement wherein there is provided differentiating means to differentiate the output signal of said receiver to provide a differential signal and summation means to add said differential signal to a representation of the output signal of said receiver to provide a summation signal.
A signal processor for use in an ultrasonic scanning or imaging system comprising differentiating means for differentiating the signal applied to the input thereof to provide a differential signal, circuit means for providing a delayed representation of the signal applied to the input thereof, input means for receiving an input signal and applying a representation of said input signal to the input of said differentiating means and the same representation of said input signal to the input of said circuit means, and summing means for adding said differential signal to said delayed representation.
In an ultrasonic imaging device having means to apply ultrasonic pulses to a subject to scan impedance changes in said subject and to detect the resulting sonic reflections and generate electrical signal from said reflections, and a receiver to demodulate the received signals, and an image storage device to store an image of the acoustic impedance changes represented by said electrical signals, the improvement wherein there is provided differentiating means to differentiate the output signal of said receiver to provide a differential signal and summation means to add said differential signal to a representation of the output signal of said receiver to provide a summation signal, and means to apply said summation signal to said image storage device to provide said image of said acoustic impedance changes.
Dependencies are inferred from the claim text.