Signal Space Separation Method for a Biomagnetic Sensor Array Arranged on a Flat Plane for Magnetocardiographic Applications: A Computer Simulation Study

Figure 14

(a) Upper panel: the signal plus sensor-noise time courses . Lower panel: the interference time courses . (b) Upper panel: the interference-overlapped sensor time courses . Lower panel: the SSS interference removal results . These time courses are normalized to the maximum value in each panel. (c) The current-density map obtained from . (d) The current-density map obtained from interference-overlapped sensor time courses . (e) The current-density map obtained from the SSS interference-removal results with the original lead field . (f) The current-density map obtained using with the SSS-modified lead field . Here, two-dimensional current-density maps on the plane , which is the plane 8 cm below the sensor plane, are reconstructed using the field map at . The signal data were computed assuming two sources, located at (−5 cm, 4 cm, and 3 cm) and (4 cm, −3 cm, and 3 cm).

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