Method for detecting presence of ferromagnetic objects in a medi

Details Method for detecting presence of ferromagnetic objects in a medi Method for detecting presence of ferromagnetic objects in a medi

1994-10-26

1996-02-27

Zele, Krista M.

Surgery

Truss

Pad

324248, 324261, 128782, A61B 505

Patent

active

054940354

ABSTRACT:
Medical patients are screened prior to magnetic resonance imaging by using a superconducting quantum interference device magnetometer to detect the unknown presence of an implanted ferromagnetic object. The patient is placed on a table which vibrates at approximately five Hertz. The magnetometer is sequentially held stationary at a plurality of positions adjacent to the patient being vibrated. The magnetic field intensity is measured at each position with the magnetometer and the magnetic field measurements are used to determine the presence and location of a ferromagnetic object within the patient.

REFERENCES:
patent: 4804915 (1989-02-01), Hoenig
patent: 4922916 (1990-05-01), Ermert et al.
patent: 4995395 (1991-02-01), Illmoniemi et al.
patent: 5018724 (1991-05-01), Naser et al.
patent: 5265609 (1993-11-01), Buchanan et al.
patent: 5384109 (1995-01-01), Klaveness et al.
Article entitled "MR Procedures and Biomedical Implants, Materials, and Devices: 1993 Update" from Nov. 1993 issue of Radiology, pp. 587-599.

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