Figure 4 | Scientific Reports

Figure 4

From: Magnetocardiography on an isolated animal heart with a room-temperature optically pumped magnetometer

Figure 4

Guinea-pig heart and the magnetocardiogram. (a) Picture of an isolated guinea-pig heart inside a plastic chamber. (b) Example of a magnetometer signal (without averaging) in volts when a guinea-pig heart is placed close to the magnetometer. (c) Magnetic field from the heart in pT. The deconvoluted signal was low-pass filtered using a Type I Chebyshev filter with a cut-off frequency of 250 Hz to supress high-frequency noise. The temperature ≈26 °C of the cesium vapor cell was slightly above room temperature due to heating from the heart which was perfused with ≈37 °C warm physiological solution.

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