FIELD: medicine.
SUBSTANCE: disclosed are versions of implementation which improve efficiency of ultrasound, for example, by means of high efficiency, signal measurement systems, calibration and providing a radio frequency (RF) drive of a control system configured to actuate one or more focused ultrasonic transducers. RF drive can contain one or more power amplifiers containing one or more III-V semiconductors, (for example, gallium nitride GaN, GaAs, GaSb, InP, InAs, InSb, InGaAs, AlSb, AlGaAs and/or AlGaN) field-effect transistors for efficient provision of high power with clear narrow-band RF signals over a wide frequency range. RF drive may comprise a power measurement and/or calibration system for observing amplitude and the phase of the RF signal output from the power amplifier, and estimating the amount of RF power delivered to the ultrasonic transducers.
EFFECT: use of this group of inventions will make it possible to increase efficiency of dermatological (for example, cosmetic) ultrasonic procedures.
43 cl, 24 dwg
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