POWER MANAGEMENT IN PORTABLE ULTRASOUND DEVICES
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United States of America Patent
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Issued Date -
Feb 12, 2009
app pub date -
Aug 7, 2008
filing date -
Aug 10, 2007
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Abstract
A method for operating an ultrasound device comprises automatically switching among power modes in responses to changes in the power remaining available for operation of the ultrasound device. Two or more power modes may be available for each of a number of operational modes. The power modes may trade off performance against operating time. In some embodiments the ultrasound device can operate in a reduced-power idle mode in which the ultrasound device checks for ultrasound echoes indicating that a transducer is against a subject. In some embodiments, switching among power modes involves changes such as: changing a line density of ultrasound images; changing numbers of transducer elements being used for ultrasound transmission and/or reception; reconfiguring data processing circuitry; and changing pulse characteristics of transmitted ultrasound.
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