RADIO-FREQUENCY TRANSMITTER-RECEIVER TO MAGNETIC RESONANCE SCANNER FOR ORTHOPAEDIC MAGNETIC TOMOGRAPH Russian patent published in 2011 - IPC A61B5/55 G01R33/32 G01R33/36 

FIELD: medicine.

SUBSTANCE: invention refers to medical equipment, namely to a radio-frequency transmitter-receiver to a magnetic-resonance scanner for an orthopaedic magnetic tomograph. The device comprises a drive radio pulse former, a radio pulse amplifier unit, a transmitter, a radio-frequency signal receiver, a receiver and transmitter radio-frequency coils connected to the receiver and transmitter respectively. The transmitter and receiver radio-frequency coils are integrated in one transmitter-receiver coil. The drive radio pulse former is connected through a switchboard with a the radio pulse amplifier unit comprising a box of the amplifiers of various amplification coefficients for each type of the transmitter-receiver coil. An input of the switchboard is connected to an output of a first comparator with its first input connected to a memory unit. For transmitter-receiver coil type identification, an RC-chain is integrated in each coil. The RC-chain input is connected with a step voltage control device, and an output - to a second comparator. A second input of the comparator is connected with the step voltage control device, and an output - to a delay time metre with its second input also connected with the step voltage control device, and an output - with the second input of the first comparator.

EFFECT: use of the invention allows decreasing power and reducing an effect of high-frequency electromagnetic field on a human body.

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