Abstract #0448
Field Probes with In-Situ Controllable Thermal Relaxation Times
David O. Brunner 1 , Simon Gross 1 , Jennifer Nussbaum 1 , Benjamin E. Dietrich 1 , Christoph Barmet 1,2 , and Klaas P. Pruessmann 1
1
Institute for Biomedical Engineering,
University and ETH Zurich, Zurich, Switzerland,
2
Skope
Magnetic Resonance Technologies LLC, Zurich, Switzerland
For optimal performance, the T
1
and
T
2
relaxation
times of NMR based field sensors should be appropriately
chosen compared to the repetition time of their
re-excitation in the envisioned application. Too fast
relaxations would prevent acquiring long read-outs,
however too fast re-excitation would generate confounded
field values due to occurring spurious echoes in the
sensor. To date this is achieved by paramagnetic dopants
added when manufacturing the probes but in this work we
present an approach based on electrochemical reactions
allowing tuning the relaxation time of an existing
sensor between reversibly 3 ms and 60 ms.
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