Apparatus and method for imaging the structure of diamagnetic an

Electricity: measuring and testing – Magnetic – Susceptibility

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

324226, G01N 2776, G01R 3316

Patent

active

054081785

ABSTRACT:
The surface or internal structure of diamagnetic and paramagnetic materials is imaged by measuring, preferably with a superconducting quantum interference device (SQUID) magnetometer, perturbations to an applied magnetic field resulting from variations in magnetic susceptibility at an array of locations across the object. The array of perturbation measurements is processed to generate a map of local susceptiblities. For implementation of susceptibility tomography, multiple arrays of perturbation signals for a plurality of relative orientations between the object, the field, and the measurement locations are processed to generate values for local susceptibility at selected sites within the object, such as along a selected sectional plane.

REFERENCES:
patent: 3980076 (1976-09-01), Wikswo, Jr. et al.
patent: 4079730 (1978-03-01), Wikswo, Jr. et al.
patent: 4827217 (1989-05-01), Paulson
patent: 4859943 (1989-08-01), Evans et al.
patent: 4969496 (1990-11-01), Mills
patent: 5073858 (1991-12-01), Mills
"Biomagnetic Instrumentation," Romani et al., Rev. Sci. Instrum., vol. 53, No. 12, Dec. 1982.
D. C. Barber, A Review Of Image Reconstruction Techniques For Electrical Impedance Tomograph, Department of Medical Physics and Clinical Engineering, Royal Hallamshire Hospital Sep. 9, 1988, pp. 162-169.
Bates, et al., A Limitation Of Systems For Imaging Electrical Conductivity Distribution, IEEE Transactions on Biomedical Engineering, vol. BME-27, No. 7, Jul. 1980, pp. 418-420.
Clark et al, Tagged Adhesives For Improved Electromagnetic Inspection, The American Society for Nondestructive Testing, Inc., Materials Evaluation/48/Jan. 1990 pp. 60-64.
Clark et al., Tagging Lets You Test The Untestable, Advanced Materials & Processes Apr. 1990 pp. 59-69.
M. Hashimoto, et al., Nondestructive Testing Using Magnetic Field Visualization Technique, Review of Progress in Quantitative Nondestructive Evaluation, vol.9, pp. 585-592 1990.
D. E. Farrell, et al., Non-Invasive Squid Diagnosis Of Liver Iron Overload, 1981, pp. 507-518 (no month).
S. H. H. Sadeghi, et al., A New Technique For Sizing Cracks In Metals, Utilizing An Induced Surface Magnetic Field, Review of Progress in Quantitative Nondestructive Evaluation, vol. 9 1990, pp. 593-600.
C. M. Bastuscheck, et al., Technique For Measuring The AC Susceptibility Of Portions Of The Human Body Or Other Large Objects J. Appl. Phys, 58(10), 15 Nov. 1985, ppp. 3896-3906.
Skeketee et al., Measurement Of Magnetic Susceptibility In Living Rats, Med. & Biol. Eng. & Comput, 1980, 18, pp. 253-260.
Czipott et al., Use Of A Superconductive Gradiometer In An Ultrasensitive Electromagnetic Metal Detector, IEEE Transactions on Magnetics, vol. 25, No., 2, Mar. 1989, pp. 1204-1207.
S. Evanson, et al., A Comparison Of The Performance Of Planar And Conventional Second Order Gradiometers Coupled To A Squid For The NDT Of Steel Plates, IEEE Transactions of Magnetics, vol. 2, Mar. 1989, pp. 1200-1203.
S. DiLuzio, et al., Magnetic Mapping Of DC Fields Related To Tissue Susceptibility In The Human Body, Advances in Bio-Magnetism, pp. 505-508 (Aug. 1989).
Weinstock, A Review Of Squid Magnetometry Applied To Non-Destructive Evaluation, presented at ACS '90, (Aug. 10, 1987).
E. J. Cukauskas, et al. Magnetic Susceptibility Measurements Using A Superconducting Magnetometer, Rev. Sci. Instrum., vol. 45, No. 1, Jan., 1974, pp. 1-6.
J. S. Philo, et al. High-Sensitivity Magnetic Susceptometer Employing Superconducting Technology, Rev. Sci. Instrum., vol. 48, No. 12, Dec. 1977, pp. 1529-1536.
D. N. Paulson et al. Superconducting Magnetometer System For Detecting Lung Containments, IEEE Transactions on Magnetics vol. Mag-23, No. 2, Mar. 1987, pp. 1315-1318.
D. Rassi et al., Squid Measurements And Computational Modelling Of A Simple Thorax Phantom, Biomagnetism '87 6th International Conference on Biomagnetism, Tokyo, Japan Aug. 27, 1930 pp. 402-405.
John P. Wikswo, Jr., Noninvasive Magnetic Detection Of Cardiac Mechanical Activity: Theory, Med. Phys. 7(4), Jul./Aug. 1980 pp. 297-306.
John P. Wikswo, Jr., et al., Noninvasive Magnetic Detection Of Cardiac Mechanical Activity: Experiments, Med. Phys. 7(4), Jul./Aug. 1980, pp. 307-313.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Apparatus and method for imaging the structure of diamagnetic an does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus and method for imaging the structure of diamagnetic an, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for imaging the structure of diamagnetic an will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-68755

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.