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US 9,651,701 B2Granted
Ferromagnetic incident detecting and logging arrangement
AssigneeKopp Development Inc.
InventorKeith Kopp
Life of this patent
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AssigneeKopp Development Inc.
InventorKeith Kopp
Estimating the term…
An arrangement for association with an MRI and detecting presence of ferrous material and discriminating out far field magnetic disturbance. The arrangement includes a detector configured to monitor the magnetic field and includes an array of sensors arranged about the periphery of an opening in a spaced arrangement such that each sensor is associated with a different portion of the opening. Each of the sensors is configured to output a signal having a value indicative of the sensed magnetic field at the associated portion of the opening. The arrangement includes a corrector configured to correct each signal value from the change in response to the far field magnetic disturbance and to provide respective corrected signal values. The arrangement includes a processor configured to use the corrected signal values to determine a ferrous-indicating limit is exceeded and to provide a safety response that addresses the ferrous-indicating limit exceed condition.
An arrangement for association with an operable MRI apparatus located within a room that has an access opening and with the MRI apparatus providing a residual magnetic field that extends to a location of the access opening, and for detecting presence of ferrous material and discriminating out far field magnetic disturbance, the arrangement including:
An arrangement as set forth in 1, wherein the corrector includes:
An arrangement as set forth in 1, wherein the access opening is a doorway having a movable door thereat, the arrangement including a direction sensing arrangement configured to determine movement direction of the door.
An arrangement as set forth in 10, wherein the processor is configured to modifying the safety response as a function of the determined movement direction of the door.
An arrangement as set forth in 10, wherein the direction sensing arrangement includes at least one photoelectric emitter-detector device.
An arrangement as set forth in 1, wherein the access opening permits movement of an object there through, the arrangement including a direction sensing arrangement configured to determine movement direction of the object.
An arrangement as set forth in 13, wherein the processor is configured to modifying the safety response as a function of the determined movement direction of the object.
An arrangement as set forth in 13, wherein the direction sensing arrangement includes at least one photoelectric emitter-detector device.
An arrangement as set forth in 13, wherein the object is a person.
An arrangement as set forth in 1, wherein the access opening permits an object to be present at the access opening, the arrangement including a presence sensing arrangement configured to determine presence of the object at the access opening.
An arrangement as set forth in 17, wherein the processor is configured to modifying the safety response as a function of the determined presence of the object.
An arrangement as set forth in 17, wherein the presence sensing arrangement includes at least one photoelectric emitter-detector device.
An arrangement as set forth in 17, wherein the object is a person.
Dependencies are inferred from the claim text.