Local coil for MRI system, has rectifying unit for supplying voltage of preamplifier, for amplifying signal from examination subject

摘要

The local coil (106) has pre-amplifier (50) for amplifying signal (E) received from an examination subject such as patient in a receiving phase of the coil. A detuning device (6) is provided for detuning the local coil in a transmission phase of coil. A rectifying unit (30) is provided for supplying voltage of the preamplifier, for amplifying signal from examination subject. A bridge circuit is provided in the rectifying unit. A pin diode is provided at the input of pre-amplifier.