MRI Active Detuning Module
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10 MRI Active Detuning Module
10.1 Overview
The HPPR/2 MRI ACTIVE DETUNING Module (ADM) belongs to the group of MRI interface
modules. It combines the functionality of the former BIO ACT DEC/COIL CONTROL UNIT
(T5051) and the HPPR/2 MRI-INTERFACE MODULE RF1-4 (Z106268).
The ADM has four coil control channels. Each has four PIN diode drivers, four tuning/
matching varicap diode drivers and additional control signals. They are used to tune or
detune individual coils in the receiver array.
RF connections provide interconnects between the coil array (incl. array preamps), the
preamplifier modules and the receiver boards in the AQS chassis. In AV4 systems some of
these connections have been moved to the HPPR/2 MRI BASEPLATE.
Figure10.1: View HPPR/2 MRI ACTIVE DETUNING Module