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WattMRI Resource Directory:<br> - UltraSound Physics -
(W) The SI unit of power.
Definition: 1 watt is equal to a power rate of one joule of work per second of time or in electrical terms it is the power produced by a current of one ampere flowing through an electric potential of one volt.
Power is the rate at which work is done, or the rate at which energy is expended and is used both in mechanics and in electricity.
The unit is named for James Watt, a British engineer.
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Absorbed DoseMRI Resource Directory:<br> - UltraSound Physics -
In physics, the absorbed dose is the ultrasonic power absorbed per unit of mass of an object, and is measured in watts per kilogram (W/kg). The absorption increases with ultrasound intensity and frequency.
The thermal index describes the potential for heating of the patient's tissue due to the application of energy.
See also Thermal Effect, Ultrasound Safety, Ultrasound Regulations.
Radiology-tip.comRadiation Absorbed Dose
Radiology-tip.comAbsorbed Dose

 Further Reading:
Physics Tutorial: Ultrasound PhysicsOpen this link in a new window
   by www.physics247.com    
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Acoustic PowerMRI Resource Directory:<br> - UltraSound Physics -
The acoustic power of sound and ultrasound is the energy delivered per unit of time. The power is measured in Watt (W) and is proportional to the square of the amplitude.
1 W = 1 joule/second.
See also Directivity Index, Spatial Average Intensity, and Source Level.

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AmpereMRI Resource Directory:<br> - UltraSound Physics -
(A or amp) The SI base unit of electric current.
Definition: Two parallel conductors, infinitely long and having negligible cross section should be placed 1 meter apart in a perfect vacuum. One ampere is the current that creates between them a force of 0.2 microNewton per meter of length.
One ampere represents a current flow of 1 coulomb of charge per second.
One ampere of current results from a potential distribution of 1 volt per ohm of resistance, or from a power production rate of 1 watt per volt of potential.
The unit is known informally as the amp, but A is its official symbol and is named for the French physicist André-Marie Ampère.
See also System International.

 Further Reading:
How Many? A Dictionary of Units of Measurement© Russ Rowlett and the University of North Carolina at Chapel HillOpen this link in a new window
Wednesday, 21 March 2001   by www.unc.edu    
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Apogee 800PlusInfoSheet: - Devices -
TypesMRI Resource Directory:<br> - Devices Machines Scanners Systems -

From SIUI Inc.;
'The Apogee 800Plus ultrasound system offers a new level of high quality in image. With broad clinical application, the system delivers ease of use for cardiac and vascular exams.'
'Due to the exceptional image quality, the sensitivity of color Doppler and many other advanced features, the Apogee 800Plus offers complete diagnosis capability for your entire patient population, including abdominal, obstetrics, gynecology, adult cardiology, pediatric cardiology, peripheral vascular, small parts, breast, prostate, transcranial, etc.'

Device Information and Specification
APPLICATIONS Abdominal, cardiac, OB/GYN, small parts, transcranial, vascular
CONFIGURATION Normal system, display: 2D(256); M-mode(128); Doppler(128); Color(128)
TRANSDUCERS Linear, curved, phased and symmetric phased array
IMAGING MODES 2D, M-mode, Pulsed wave Doppler, Color Power Angio Imaging, Color 2D, Color M-mode, High PRF Doppler
H*W*D m 1.46 * 0.69 * 0.87
WEIGHT 140 kg (without peripherals)
POWER REQUIREMENT 115Vac, (V~), @ 50 to 60 Hz, 1.2kVA
230Vac, (V~), @ 50 to 60 Hz, 1.2kVA
POWER CONSUMPTION 800 Watts (with optional OEM'S: 1200 Watts max)

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