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Abstract:
We present an optical link used to transmit a reference signal in spectroscopy (ERETIC method). The optical link has the peculiarity to be safety and inexpensive since it is made of only a low noise preamplifier, a high speed LED, polymer optical fiber and a photodiode. The reference signal is generated outside the MR room, it travels along the optical fiber, enters the scanner room’s Faraday shield through a waveguide and is injected into a birdcage coil by inductive coupling. The link is shown to be reliable and stable over time consenting so, good fidelity quantitative measurements of metabolite concentrations.
