Ultrasonic processes and circuits for performing them
First Claim
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1. A process for imaging an examination area containing an ultrasonic contrast agent, which comprises:
- subjecting the examination area to ultrasonic energy of two different excitation frequencies, and imaging the examination area by detecting a signal including reflected and/or backscattered signals generated by non-linearity in the examination area.
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Abstract
A process for selective graphic representation and/or evaluation of the Doppler spectrum of objects limitedly resistant to sonic intensity, for example biological organs and tissues, by an ultrasonic process wherein a material is introduced in the examination area to be acoustically irradiated, nonlinear oscillations are produced in the examination area by irradiated ultrasonic waves and the signal is evaluated by an ultrasonic converter. Also, a circuit for carrying out the above process is disclosed.
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Citations
27 Claims
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1. A process for imaging an examination area containing an ultrasonic contrast agent, which comprises:
subjecting the examination area to ultrasonic energy of two different excitation frequencies, and imaging the examination area by detecting a signal including reflected and/or backscattered signals generated by non-linearity in the examination area. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A process for imaging an examination area containing an ultrasonic contrast agent, which comprises:
subjecting the examination area to ultrasonic energy of frequency, fo, and imaging the examination area using reflected and/or backscattered signals generated by non-linearity of the contrast agent, which signals are frequency-shifted from the frequency, fo. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A process for imaging an examination area containing an ultrasonic contrast agent, which comprises:
subjecting the examination area to ultrasonic energy of frequency, fo, and imaging the examination area using reflected and/or backscattered signals generated by non-linearity of the contrast agent. - View Dependent Claims (17, 18)
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19. A process for imaging a patient to whom an ultrasonic contrast agent has been administered, which comprises:
subjecting the patient to ultrasonic energy and imaging the patient using reflected and/or backscattered signals generated by non-linearity of the contrast agent. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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