Patent ID: 8229540
Filing Date: 2012-07-24
Classification: A61B

Abstract:
1. A method of signal processing which is used to separate from a signal registered using a measuring instrument that measures a dynamic phenomenon, a signal associated with a static source in a measurement object, in which method the measurement object and the measuring instrument move with respect to one another, wherein the measurement object is freely movable, the method further comprising: measuring magnetic fields of the measurement object with a multichannel magnetometer; determining the movement of the measuring instrument and the measurement object with respect to one another based on the signal registered using the measuring instrument; modelling the movement of the measurement object as a movement of the measuring instrument around the measurement object; presenting the signal registered as elementary fields in a signal space basis whose basis vector coefficients have been attached to the co-ordinates of the measurement object based on a known geometry between the measurement object and the measuring instrument, whereby the signal produced by a static source is detected as a static signal; and separating the aforementioned static signal from the signal registered; wherein the measurement object is a brain.