A new approach to MRI detection is reported, where an optomechanical transducer directly converts and amplifies the MR signal to amplitude modulation of laser light. The transducer, which is simultaneously a capacitor and an optical cavity, is connected directly in parallel to the receive coil. The mechanical Q-factor of the transducer is 1500, providing a 3 dB bandwidth of 1 kHz. We show here for the first time that this technology can be used to directly acquire a 13C MRI at 3T (32.13 MHz), and reconstruct it using the standard pipeline of a commercial MR scanner.
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