Magnetic field measurement apparatus
US6842637B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2001 |
| Grant date | Jan 11, 2005 |
| Priority date | — |
| Expiry date | Jul 12, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/344
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A magnetic field measurement apparatus includes a plurality of magnetometers each having SQUID's and three detection coils, one of which detects each of three orthogonal directional magnetic field components (Bx, By, Bz) of a magnetic field generated from a subject to be inspected, a display which displays time variation of waveforms of the magnitude (√(Bx2+By2+Bz2)) of magnetic field synthesized by square sum of each of the three orthogonal directional magnetic field components of the magnetic field generated from the subject to be inspected, a holder for holding a Dewar's vessel for arranging magnetometers therein, and a controller for controlling a positional relationship between the subject to be inspected and the Dewar's vessel. Accurate time variation of the magnetic field generated from the subject to be inspected can be detected without influence of positional change of the subject to be inspected, by simultaneously measuring each of the three orthogonal directional magnetic field components (Bx, By, Bz) of the magnetic field generated from current sources in the subject to be inspected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.