MAGNETOMETER FOR MEDICAL USE
First Claim
1. A magnetometer system for medical use, comprising:
- one or more induction coils for detecting a time varying magnetic field, each coil having a maximum outer diameter of 4 to 7 cm, and a configuration such that the ratio of the coil'"'"'s length to its outer diameter is at least 0.5, and the ratio of the coil'"'"'s inner diameter to its outer diameter is 0.5 or less; and
a detection circuit coupled to each coil and configured to convert a current or voltage generated in the coil by a time varying magnetic field to an output signal for use to analyse the time varying magnetic field.
2 Assignments
0 Petitions
Accused Products
Abstract
A medical magnetometer 10 comprising one or more induction coils 2 for detecting a time varying magnetic field of a region of a subject'"'"'s body, such as the heart. Each coil has a maximum outer diameter of 4 to 7 cm, and a configuration such that the ratio of the coil'"'"'s length to its outer diameter is at least 0.5, and the ratio of the coil'"'"'s inner diameter to its outer diameter is 0.5 or less.
Each induction coil 2 is coupled to a respective detection circuit comprising a low impedance pre-amplifier 3, a low pass filter 5, a notch filter 6 to remove line noise, and an averaging element 7. Each detection circuit produces an output signal 9 for use to analyse the time varying magnetic field of the region of the subject'"'"'s body.
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Citations
19 Claims
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1. A magnetometer system for medical use, comprising:
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one or more induction coils for detecting a time varying magnetic field, each coil having a maximum outer diameter of 4 to 7 cm, and a configuration such that the ratio of the coil'"'"'s length to its outer diameter is at least 0.5, and the ratio of the coil'"'"'s inner diameter to its outer diameter is 0.5 or less; and a detection circuit coupled to each coil and configured to convert a current or voltage generated in the coil by a time varying magnetic field to an output signal for use to analyse the time varying magnetic field. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 18)
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10. A coil for use to detect the time-varying magnetic field of a region of a subject'"'"'s body, the coil comprising:
an induction coil having a maximum outer diameter of 4 to 7 cm, and a configuration such that the ratio of the coil'"'"'s length to its outer diameter is at least 0.5, and the ratio of the coil'"'"'s inner diameter to its outer diameter is 0.5 or less.
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11. A method of analysing the magnetic field of a region of a subject'"'"'s body, the method comprising:
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using one or more induction coils to detect the time varying magnetic field of a region of a subject'"'"'s body, each coil having a maximum outer diameter of 4 to 7 cm, and a configuration such that the ratio of the coil'"'"'s length to its outer diameter is at least 0.5, and the ratio of the coil'"'"'s inner diameter to its outer diameter is 0.5 or less; using a detection circuit or circuits coupled to the coil or coils to convert a current or voltage generated in each coil by the time varying magnetic field of the region of the subject'"'"'s body to a respective output signal for the coil; and using the output signal or signals from the coil or coils to analyse the magnetic field generated by the region of the subject'"'"'s body. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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19-21. -21. (canceled)
Specification