Means for increasing sensitivity in non-linear ultrasound imaging systems
Patent 5577505 Issued on November 26, 1996. Estimated Expiration Date: 
February 6, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 6, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesUltrasonic processes and circuits for performing them Ultrasonic detection of contrast agents Acoustic power control technique Patent #: 5482046 InventorsApplicationNo. 597697 filed on 02/06/1996US Classes:600/458Contrast enhancementExaminersPrimary: Manuel, GeorgeAttorney, Agent or FirmInternational ClassA61B 008/00AbstractAn image with increased sensitivity to non-linear responses, particularly second harmonic responses, can be achieved by measuring the ultrasound response under multiple excitation levels. The responses gathered from the multiple excitation levels are gain corrected in an amount corresponding to the difference in excitation levels, then subtracted. Because of this subtraction, most of the linear response will be removed, and what remains corresponds to the non-linear response.Other References
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