Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1996-12-18
1999-01-19
Arana, Louis
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
324318, G01V 300
Patent
active
058617493
ABSTRACT:
Magnetic resonance apparatus includes an RF measuring coil system (12) for detection of magnetic resonance signals to be generated in an object to be examined, which measuring coil system includes an at least one-dimensional array (33) of contiguous surface coils (33a, . . . 33f) and means for decoupling the surface coils from one another, and a signal processing circuit (15) which is connected to the surface coils and includes a number of processing channels (49a, 49b, 49c) for processing RF signals generated by the surface coils. Between the surface coils (33a, . . . ,) and the signal processing circuit (15) there is arranged a combination circuit (13) which includes at least two adder units (45a, 45b, 45c), each adder unit having at least two inputs and one output (47a, 47b, 47c) and being arranged to add signals, presented to its input, with a predetermined mutual phase shift, and to make the signal resulting from the addition available on the output. Each input of the adder unit (45a, . . . ) is connected to one of the surface coils (33a, . . . ) and the surface coils connected to the inputs of one and the same adder unit constitute a contiguous part of the array (33). The output of each adder unit (45a, . . . ) is connected to one of the processing channels (49a, . . . ) of the signal processing circuit (15). As a result of these steps, the number of processing channels (49a, . . . ) can be substantially smaller than the number of surface coils (33a, . . . ). Consequently, the construction of the signal processing circuit (15) is comparatively simple and inexpensive.
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Arana Louis
Renfrew, Jr. Dwight H.
U.S. Philips Corporation
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