ArticleMagnetic resonance in medicine2026
Optical Detuning Strategies for Shielded Loop Resonators.
Article in Magnetic resonance in medicine, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeTo compare detuning performance and evaluate power requirements of optical detuning methods and to demonstrate feasibility of an optically-detuned 4-channel receive array.
methodsFour optical detuning methods were compared in simulations, bench tests, and phantom measurements at 3T against conventional galvanic detuning. Passive detuning was also tested as an additional wireless detuning option. Optical power requirements for the detuning networks were investigated, and a flexible optically-detuned 4-channel shielded loop resonator (SLR) array was constructed and tested in vivo.
resultsA photodiode-PIN diode combination exhibited the highest unloaded Q (68.6) and Q ratio (1.9), with detuning performance and signal-to-noise ratio comparable to that of galvanic detuning at an optical power of 10 mW. Using this detuning strategy, in vivo images of the knee and brain were successfully acquired with a 4-channel flexible array.
conclusionOptical detuning is a practical alternative to conventional galvanic detuning in flexible SLR arrays. With developments in optical signal and power transmission, optimizing optical detuning while meeting manageable power requirements is an important step toward fully optical receive coil arrays. This study provides a reference point for the total optical power required for active detuning in such optical coil systems.
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