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. Author manuscript; available in PMC: 2016 Mar 1.
Published in final edited form as: Stroke. 2015 Jan 22;46(3):e62–e66. doi: 10.1161/STROKEAHA.114.007324

Figure 1.

Figure 1

(A) Implantable resonator with 10 mm and 15 mm length of transmission line for pO2 measurement at different depths; (B) Schematic of a surface loop resonator coupled to the implantable resonator for pO2 measurement at four sites in a rabbit brain; (C) Typical EPR spectra acquired from the implantable resonator with sensory loops (SL1-SL4) perfused with N2, 5% O2 and 21 % O2 for the purpose of calibration; (D) Change in line-width with pO2 (calibration) of each sensor loop from left to right.