Biomagnetic field measuring apparatus

A biomagnetic field measurement apparatus comprising:

• a shielded room;
• a bed which is adapted to hold a subject to be inspected in said shielded room;
• a cryostat in which a plurality of SQUID magnetometers are arranged at low temperature, wherein said cryostat is arranged in said shielded room and the plurality of SQUID magnetometers detect a magnetic field generated from a heart of a fetus in said subject to be inspected, and a lower surface of said cryostat is arranged near or on a surface of the lower abdomen of said subject to be inspected;
• a gantry which is adapted to hold said cryostat in said shielded room;
• a driving and detecting circuit which drives the plurality of SQUID magnetometers and detects signals from the plurality of SQUID magnetometers;
• a computer which collects the signals from said driving and detecting circuit and which processes the signals from said driving and detecting circuit to obtain a magnetic field waveform expressing a temporal change of said magnetic field;
• an ultrasonic transducer probe arranged in said shielded room;
• a main body of an ultrasonic diagnosis apparatus which comprises a transmitting circuit and a processor, and which is arranged outside of said shielded room, wherein said transmitting circuit drives said ultrasonic transducer probe and said ultrasonic transducer probe transmits an ultrasound wave to the heart of the fetus of said subject to be inspected, and said processor processes reflected ultrasound waves from the heart of the fetus, to obtain an ultrasonic image of the fetus, and said reflected ultrasound waves are received by said ultrasonic transducer probe;
• a probe holder which is adapted to hold said ultrasonic transducer probe and to bring a surface of said ultrasonic transducer probe into contact with the surface of the lower abdomen of said subject to be inspected, and which is arranged on said bed or said gantry;
• and
• a display which is arranged in said shielded room and displays said ultrasonic image of the fetus.

A biomagnetic field measurement apparatus comprising:

• a shielded room;
• a bed which is adapted to hold a subject to be inspected in said shielded room;
• a cryostat in which a plurality of SQUID magnetometers are arranged at low temperature, wherein said cryostat is arranged in said shielded room, and the plurality of SQUID magnetometers detect a normal component of a magnetic field generated from a heart of a fetus in said subject to be inspected, and a lower surface of said cryostat is arranged near or on a surface of the lower abdomen of said subject to be inspected;
• a gantry which is adapted to hold said cryostat in said shielded room;
• a driving and detecting circuit which drives the plurality of SQUID magnetometers and detects signals from the plurality of SQUID magnetometers;
• a computer which collects the signals from said driving and detecting circuit and which processes the signals from said driving and detecting circuit to obtain a magnetic of the magnetic field in the heart of said fetus in said subject to be inspected, wherein said computer calculates said distribution of the magnetic field by an equation of {square root over ((dBz+L /dx)2+L +(dBz+L /dy)2+L )}, where (x, y, z) are Cartesian coordinates and Bz is said normal component of said magnetic field;
• and
• a display which is arranged in said shielded room and displays said distribution of the magnetic field.