| http://www.w3.org/ns/prov#value | - It is possible with particular advantage for the first evaluation unit to be connected to the electronics unit of the PET unit part via at least one signal line running inside and outside the PET unit part, and for a part of the signal line that runs inside the PET unit part to be provided with a filter, in particular with a bandpass filter or else with a cascade of a highpass filter and a notch f
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