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Abstract #3138

Harmonic excitation of MR signal for interventional MRI

Dmitri Artemov 1 and Yoshinori Kato 1,2

1 Radiology, Johns Hopkins University, Baltimore, MD, United States, 2 3 Life Science Tokyo Advanced Research Center, Hoshi University, Tokyo, Shinagawa-ku, Japan

MR-detectable devices are important for interventional procedures, and should provide a clear imaging signature while not degrading diagnostic imaging quality. A new MR-detectable probe design is presented, based on excitation of MR signals by high-frequency RF harmonics generated by the probe with a non-linear element. The implantable probe was designed to excite MR signals when driven by an external RF filed at half-resonance frequency. A second harmonic at the resonance frequency was generated by a non-linear diode element. MR signals in the subject were excited only in close proximity to the probe and could be detected by a standard receiver coil.

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