Ferromagnetic detection enhancer compatible with magnetic resonance
First Claim
1. A magnetic resonance compatible apparatus configured for increasing the ability to detect ferromagnetic objects by scanning for magnetic fields produced by those ferromagnetic objects themselves and by increasing the magnetization of the objects but while not exposing the personnel associated with the ferromagnetic objects, to unsafe levels of magnetic fields, or to magnetic fields which exceed recognized safety levels, as the personnel and associated ferromagnetic objects are moved/passed through a portal the magnetic resonance apparatus including:
- at least one coil configured to generate a magnetic field positioned in the area of the object to be detected;
an electrical energy storage capacitor bank capable of quickly releasing stored energy;
a high speed, high current electronic switch capable of quickly transferring the stored energy from the capacitor bank to the coil thereby producing in the coil a short duration, single polarity magnetic field pulse;
a sample and hold circuit capable of acquiring magnetic field sensor data during periods when the pulsed magnetic field is not present; and
a microprocessor controller configured to control the timing and sequence of the magnetic pulse generation and the sensor data sample and hold process.
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Accused Products
Abstract
An apparatus for increasing the ability to detect ferromagnetic objects by increasing the magnetization of the objects. The apparatus includes at least one coil to generate a magnetic field positioned in the area of the object to be detected. The apparatus includes an electrical energy storage capacitor bank capable of quickly releasing stored energy. The apparatus includes a high speed, high current electronic switch capable of quickly transferring the stored energy from the capacitor bank to the coil thereby producing in the coil a short duration, single polarity magnetic field pulse. The apparatus includes a sample and hold circuit capable of acquiring magnetic field sensor data during periods when the pulsed magnetic field is not present. The apparatus includes a microprocessor controller to control timing and sequence of the magnetic pulse generation and the sensor data sample and hold process. The apparatus may be for portal handheld or head mounted applications.
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Citations
19 Claims
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1. A magnetic resonance compatible apparatus configured for increasing the ability to detect ferromagnetic objects by scanning for magnetic fields produced by those ferromagnetic objects themselves and by increasing the magnetization of the objects but while not exposing the personnel associated with the ferromagnetic objects, to unsafe levels of magnetic fields, or to magnetic fields which exceed recognized safety levels, as the personnel and associated ferromagnetic objects are moved/passed through a portal the magnetic resonance apparatus including:
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at least one coil configured to generate a magnetic field positioned in the area of the object to be detected; an electrical energy storage capacitor bank capable of quickly releasing stored energy;
a high speed, high current electronic switch capable of quickly transferring the stored energy from the capacitor bank to the coil thereby producing in the coil a short duration, single polarity magnetic field pulse;a sample and hold circuit capable of acquiring magnetic field sensor data during periods when the pulsed magnetic field is not present; and a microprocessor controller configured to control the timing and sequence of the magnetic pulse generation and the sensor data sample and hold process. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A magnetic resonance compatible apparatus configured for increasing the ability to detect ferromagnetic objects passing under a hand-held detector by scanning for magnetic fields produced by those ferromagnetic objects themselves and by increasing the magnetization of the ferromagnetic objects while not exposing the personnel associated with the ferromagnetic objects to unsafe levels of magnetic fields, or to magnetic fields which exceed recognized safety levels, the magnetic resonance compatible apparatus including:
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at least one coil configured to generate a magnetic field positioned in the area of the object to be detected; an electrical energy storage capacitor bank capable of quickly releasing stored energy; a high speed, high current electronic switch capable of quickly transferring the stored energy from the capacitor bank to the coil thereby producing in the coil a short duration, single polarity magnetic field pulse; a sample and hold circuit capable of acquiring magnetic field sensor data during periods when the pulsed magnetic field is not present; and a microprocessor controller configured to control the timing and sequence of the magnetic pulse generation and the sensor data sample and hold process. - View Dependent Claims (15)
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16. A head mounted magnetic resonance compatible apparatus which increases the ability to detect ferromagnetic objects by scanning for magnetic fields produced by those ferromagnetic objects themselves and by increasing the magnetization of the ferromagnetic objects while also not exposing the personnel associated with the ferromagnetic objects, to unsafe levels of magnetic fields, or to magnetic fields which exceed recognized safety levels, existing in the orbit of the eye the magnetic resonance compatible apparatus including:
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at least one coil configured to generate a magnetic field positioned in the area of the object to be detected;
an electrical energy storage capacitor bank capable of quickly releasing the stored energy;a high speed, high current electronic switch capable of quickly transferring the stored energy from the capacitor bank to the coil thereby producing in the coil a short duration, single polarity magnetic field pulse; a sample and hold circuit capable of acquiring magnetic field sensor data during periods when the pulsed magnetic field is not present; and a microprocessor controller configured to control the timing and sequence of the magnetic pulse generation and the sensor data sample and hold process. - View Dependent Claims (17, 18, 19)
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Specification