Harvey W. Ko - Columbia MD Joseph P. Skura - Ellicott City MD Harry A. C. Eaton - Columbia MD
Assignee:
The Johns Hopkins University - Baltimore MD
International Classification:
A61B 505
US Classification:
128653R
Abstract:
An apparatus and method for the passive, non-invasive magnetoencephalographic (MEG) localization and tracking of sources of magnetic signals in the brain is disclosed. The apparatus and method uses a multi-axis magnetic gradiometer to detect the magnetic field, field gradient, and polarization emanating from neuronal sources in the brain under either normal or pathological conditions.
Electromagnetic Bone Healing Sensor Using A Multi-Coil Sensor Array
Harvey W. Ko - Columbia MD Lynn W. Hart - Columbia MD Joseph P. Skura - Ellicott City MD
Assignee:
The Johns Hopkins University - Baltimore MD
International Classification:
A61B 505
US Classification:
128653
Abstract:
An apparatus and method for non-invasive sensing of bone healing is disclosed. The apparatus and method uses an electromagnetic field to measure impedance changes at and about the bone fracture site during the healing process. The impedance change at the fracture site is a direct indication of the mechanical strength of the fracture site. A multi-coil sensor array is taught, which may be sutured to the patient's skin or mounted onto a plug that is inserted through a window in the cast.
Electromagnetic Non-Invasive Measurement And Monitoring System For Osteoporosis
Harvey W. Ko - Columbia MD Joseph P. Skura - Ellicott City MD
Assignee:
The Johns Hopkins University - Baltimore MD
International Classification:
A61B 505
US Classification:
128734
Abstract:
A method for noninvasively sensing bone mass loss associated with osteoporosis is disclosed. The method uses an electromagnetic field to measure impedance (or conductivity) changes in the bone. A decrease in conductivity is indicative of osteoporosis.