Abstract: A method and apparatus to screen individuals specifically for paramagnetic or ferromagnetic objects they may be carrying or wearing, before they enter a controlled area. The device comprises a screening portal, including at least one magnetic gradiometer and its electronics. The device places all of the sensor arrays in close proximity to a subject's body, for screening purposes. The portal has at least one excitation coil oriented to cause the excitation field to have zero mutual inductance with the gradiometers.
Type:
Grant
Filed:
November 25, 2003
Date of Patent:
October 18, 2005
Assignees:
MedNovus, Inc., Quantum Magnetics, Inc.
Inventors:
Peter V. Czipott, Sankaran Kumar, Stephen Wolff, Lowell J. Burnett
Abstract: A method and apparatus to screen individuals specifically for paramagnetic or ferromagnetic objects they may be carrying or wearing, before they enter a controlled area. The device comprises a screening portal, including multiple sensor arrays and associated electronics. The device places the sensor arrays in close proximity to a subject's body, including the head and feet if desired, for screening purposes. The portal can have multiple excitation sources oriented to generate a multi-axis excitation field, and multi-axis sensors. The portal can also have an interlock with the door of the controlled area.
Type:
Application
Filed:
January 13, 2004
Publication date:
September 30, 2004
Applicants:
MedNovus, Inc., Quantum Magnetics, Inc.
Inventors:
Peter V. Czipott, Sankaran Kumar, Lowell J. Burnett, Stephen Wolff, Richard J. McClure
Abstract: A method and apparatus to screen individuals specifically for paramagnetic or ferromagnetic objects they may be carrying or wearing, before they enter a controlled area. The device comprises a screening portal, including at least one magnetic gradiometer and its electronics. The device places all of the sensor arrays in close proximity to a subject's body, for screening purposes. The portal has at least one excitation coil oriented to cause the excitation field to have zero mutual inductance with the gradiometers.
Type:
Application
Filed:
November 25, 2003
Publication date:
September 2, 2004
Applicants:
MedNovus, Inc., Quantum Magnetics, Inc.
Inventors:
Peter V. Czipott, Sankaran Kumar, Stephen Wolff, Lowell J. Burnett
Abstract: A method and apparatus to screen individuals specifically for paramagnetic or ferromagnetic objects they may be carrying or wearing, before they enter a security area. The device comprises either a screening portal or a compact, hand-held magnetic gradiometer and its electronics. The device places all of the sensor arrays in close proximity to all parts of a subject's body, for screening purposes.
Type:
Application
Filed:
November 5, 2003
Publication date:
July 29, 2004
Applicants:
MedNovus, Inc., Quantum Magnetics, Inc.
Inventors:
Peter V. Czipott, Sankaran Kumar, Stephen Wolff, Lowell J. Burnett, Richard J. McClure, R. Kemp Massengill, William F. Avrin
Abstract: A method and apparatus to screen individuals specifically for paramagnetic or ferromagnetic objects they may be carrying or wearing, before they enter the high-field region of an MRI suite. The device comprises either a screening portal or a compact, hand-held magnetic gradiometer and its electronics. The device places all of the sensor arrays in close proximity to all parts of a subject's body, for screening purposes.
Type:
Application
Filed:
October 7, 2003
Publication date:
July 29, 2004
Applicants:
MedNovus, Inc., Quantum Magnetics, Inc.
Inventors:
Peter V. Czipott, Sankaran Kumar, Stephen Wolff, Lowell J. Burnett, Richard J. McClure, R. Kemp Massengill, William F. Avrin
Abstract: The AAA client generates accounting data, transmits an accounting data transmission request message to the AAA server, and then receives a response message to the accounting data transmission request message from the AAA server. If receiving a transmission failure response message for the accounting data from the AAA server, the AAA client stores accounting data generated after receiving the transmission failure response message, and if an amount of the stored accounting data is increased to a certain limit, the AAA client sets an identifier for a batch accounting application in the accounting data and transmits an accounting data transmission request message, including stored batch accounting data and the session information, to the AAA server. The AAA server confirms the identifier and the transmission request message and searches the accounting record for session information mapped to the session information included in the ACR message.
Type:
Application
Filed:
November 6, 2003
Publication date:
May 20, 2004
Applicant:
MedNovus, Inc.
Inventors:
Byung Gil Lee, Mal Hee Kim, Hyun Gon Kim, Sung Won Sohn
Abstract: A method and apparatus for sequentially exposing a region of a patient to a low level DC magnetic field, first without movement of the region to null the sensing apparatus, then with movement of the region to detect synchronous changes in the detected signal, indicative of a ferromagnetic foreign body in the region. The nulling and signal detection can take place at a plurality of test zone set points at increasing magnitudes of the applied magnetic field. The sensing apparatus can be nulled at each test zone set point prior to introduction of the patient.
Type:
Application
Filed:
January 29, 2003
Publication date:
November 20, 2003
Applicant:
MedNovus, Inc.
Inventors:
Richard J. McClure, R. Kemp Massengill, William F. Avrin
Abstract: Methods are disclosed for non-invasive screening of the human body by rejecting the magnetic response from biological tissues in the region of interest and outputting data corresponding to the magnetic response of a ferromagnetic foreign body within the region of interest.
Type:
Grant
Filed:
September 21, 2001
Date of Patent:
December 17, 2002
Assignees:
MedNovus, Inc., Quantum Magnetics, Inc.
Inventors:
William F. Avrin, Peter V. Czipott, R. Kemp Massengill
Abstract: A probe instrument using room-temperature sensor(s) that can measure magnetic susceptibilities variations. The instrument includes room temperature magnetic sensors, and detects the sample, that is the tissue response to an applied field coil. The sensors that can be used include magnetoresistive, fluxgate and magnetoinductive sensors. The applied field coil dimensions are chosen so that the applied field is optimized for maximum response from the item of interest while minimizing the effects due to the overlying tissue and at the same time not unduly increasing the sensitivity of the instrument to adjacent organs. To minimize noise introduced in the sensor due to fluctuations in the applied field, the applied field is canceled at the position of the sensor. To overcome variations in the sensor output due to fluctuations in the applied field, change in the ambient temperature and mechanical relaxation of the instrument, the detector assembly is oscillated while the examined patient remains stationary.
Type:
Grant
Filed:
December 15, 2000
Date of Patent:
July 9, 2002
Assignees:
MedNovus, Inc., Quantum Magnetics, Inc.
Inventors:
William F. Avrin, Peter V. Czipott, R. Kemp Massengill, Sankaran Kumar