DEVICE FOR PROTECTING AN ELECTRIC IMPEDANCE TOMOGRAPH FROM OVERVOLTAGE PULSES
First Claim
Patent Images
1. An electric impedance tomograph comprising:
- electric impedance tomograph signal input;
an electrode for connection to a patient; and
a voltage protection circuit connected to said electrode and to said signal input, said voltage protection circuit shielding said signal inputs from high input currents that are too high for normal measuring operation.
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Abstract
A circuit is provided which protects the measuring input of an impedance tomograph from damage due to overvoltage. A resistor capacitor (RC) series connection is provided as a protective circuit at the measuring input.
30 Citations
20 Claims
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1. An electric impedance tomograph comprising:
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electric impedance tomograph signal input;
an electrode for connection to a patient; and
a voltage protection circuit connected to said electrode and to said signal input, said voltage protection circuit shielding said signal inputs from high input currents that are too high for normal measuring operation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An electric impedance tomograph comprising:
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at least one electric impedance tomograph signal input means;
a plurality of electrodes for connection to a patient;
a voltage protection circuit connected to at least one electrode and to said signal input, said voltage protection circuit shielding said signal inputs from high input currents that are too high for normal measuring operation, said signal input means for passing a signal from at least one electric impedance tomograph signal input through at least one voltage protection circuit to at least one electrode and detecting a feedback signal passing from at least one electrode sent through said voltage protection circuit to at least one electrical impedance signal input and providing the feedback signal for further processing to create an image. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An electric impedance tomograph comprising:
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electric impedance tomograph signal input;
an electrode connected to a patient;
an overvoltage shielding circuit connected to said electrode and to said electric impedance tomograph signal input, wherein said overvoltage shielding circuit detects high input currents that are too high for normal measuring operation and dissipates the high input current to protect said electric impedance signal input from the high input currents. - View Dependent Claims (18, 19, 20)
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Specification