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AssigneeSiemens Medical Solutions USA, Inc.
InventorsAnming Cai, Lewis Thomas
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Contrast agent destruction transmissions have reduced biological effect in medical diagnostic ultrasound. Ramping-up amplitude and/or ramping-down frequency reduce biological effect. The amplitude ramps up linearly or non-linearly. The change in amplitude or frequency occurs over a single waveform or over a sequence of separate transmissions. An envelope of the single waveform or the sequence of separate transmissions has a non-uniform, asymmetrical, symmetrical, rectangular or other shape. For example, the frequency ramp-down is provided with a non-Gaussian envelope. The amplitude ramp-up or frequency ramp-down is a progressively increasing destructive characteristic or ability, destroying contrast agent at different regions relative to focal regions with a minimum of acoustic energy.
A method for contrast agent destruction with reduced biological effect in medical diagnostic ultrasound, the method comprising the act of transmitting, into a region with contrast agents, acoustic energy with amplitudes substantially linearly increasing as a function of time.
A method for contrast agent destruction with reduced biological effect in medical diagnostic ultrasound, the method comprising the act of transmitting, into a region with contrast agents, acoustic energy with frequency decreasing as a function of time, the acoustic energy having an envelope characteristic of substantially rectangular, linearly increasing, different rate of change in a first half than a second half, abrupt transition, or combinations thereof.
A method for contrast agent destruction with reduced biological effect in medical diagnostic ultrasound, the method comprising the act of transmitting, into a region with contrast agents, acoustic energy with a progressively increasing destructive characteristic with a more rapid decrease in destruction characteristic.
A method for contrast agent destruction with reduced biological effect in medical diagnostic ultrasound, the method comprising the act of transmitting, into a region with contrast agents, a sequence of transmissions of acoustic energy, subsequent ones of the transmissions of the sequence having a frequency that is less than a previous one of the transmissions.
Dependencies are inferred from the claim text.