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|(ACR) Professional society of radiologists and medical physicists.|
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|(ASRT) Scientific and professional society of radiologic technologists.|
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GE Medical Systems and Amersham announced in April 2004 the completion of a share exchange acquisition of Amersham Health by GE. The result of this acquisition is the new GE Healthcare, based in the UK, totally owned by General Electric (GE).
Amersham plc, was a producer of contrast imaging agents used to enhance image quality in X-ray, magnetic resonance imaging, and ultrasound procedures. It was also a leading producer of radiopharmaceuticals used in nuclear medicine imaging. Amersham Health was the firm's imaging, diagnostics, and therapeutics segment. Amersham plc was involved in biotechnology research through its Amersham Biosciences unit, which made scanners, sequencers, microarrays, industrial separations, and other research supplies.
Little Chalfont, Buckinghamshire HP7 9NA
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|(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.
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