資料介紹
the markets outside of the United States account for 42% of
the sales. These figures show the increasing emphasis that the
market may place on the miniaturization of medical
ultrasound.However, in order to make ultrasound technology more
portable and available at a lower cost a number of design
parameters need to be addressed.
First transducer design on stand-alone machines typically
consists of intricate transducer arrays created with highly
sensitive piezoceramics. These generally have a high cost
associated with them, and therefore are not directly suited for
low-cost applications.
Secondly the hardware implementation of the ultrasound
transmit and receive circuitry needs to be modified to become
more portable. Traditionally ultrasound technology usually
relies upon high voltages and currents to drive the transducer
as well as sensitive circuitry to receive the acoustic waveform.
Therefore to make a system portable, lower voltage and
current power sources must be used.
Finally the beamforming algorithm which is used to steer
and focus acoustic signals must be simplified for use on a
portable system. To meet these needs tradeoffs must be made
in order to create the machine small enough to satisfy its
reduce the cost and portability requirements, but also with
enough resolution to provide the medical practitioner an image
that can be clincally usefu
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