Patent ID: 7363070

Claim:
A biomagnetic measuring system comprising: a plurality of magnetometers, each adapted to be disposed two-dimensionally at a position of (x, y) coordinates in parallel to the chest surface of a living body and used for measuring a time change of a magnetic field component in a z direction vertical to an xy plane of a biomagnetic field to be generated from the living body or time changes of magnetic components in both x and y directions in parallel to the xy plane from two opposing directions; a calculating device for calculating an output signal from each of said plurality of magnetometers used for measurements in the two opposing directions; and a display device for displaying a result of the calculation; wherein said calculating device performs: (1) calculations to obtain current distributions in the two directions from the output signals and/or to obtain distributions of the amplitudes of those current distributions; (2) a calculation to obtain an isointegral map according to the output signals in a predetermined period, and to obtain a region having an isointegral map value exceeding a predetermined threshold value; (3) a calculation to estimate the amplitude, direction, and position of one current source, from the output signal at a predetermined point of time; (4) a calculation to convert data so as to determine an optimal position for displaying the data that represents a three-dimensional heart model simulating a heart shape, and current distributions in the two directions and/or distributions of the amplitudes of those current distributions obtained in the calculation (1), using the result obtained from at least one of the calculations (2) and (3); (5) a calculation to adjust the base levels of current values into one with respect to position-adjusted current distributions in the two directions and/or distributions of the amplitudes of those current distributions; and (6) a calculation to obtain synthesized image data obtained by projecting the base-level-adjusted current distributions in the two directions and/or the distributions of the amplitudes of those current distributions, from the z direction, on a position denoted by the (x, y) coordinates of the data representing the three-dimensional heart model, and wherein the synthesized image data is displayed two-dimensionally or three-dimensionally on said display device.