Method for detecting fluid in cranuim via time varying magnetic field phase shifts
First Claim
1. A method for monitoring intracranial fluid in a patient'"'"'s head, the method comprising:
- placing a headset on the patient'"'"'s head, wherein the headset includes a first transmitter positioned at a first location on the headset, a second transmitter positioned at a second location on the headset offset from the first location, a receiver positioned at a third location on the headset offset from the first and second locations, and a processor comprising a field-programmable gate array;
providing a first signal to the first transmitter from the frequency synthesis field-programmable gate array, wherein providing the first signal includes;
producing, with the frequency synthesis field-programmable gate array, a square wave clock signal for generating a first time-varying magnetic field in the first transmitter and a sampling signal at an offset in frequency from the square wave clock signal; and
amplifying the square wave signal;
transmitting from the first transmitter, in response to the first signal, the first time-varying magnetic field through the intracranial fluid and toward the receiver;
receiving the first time-varying magnetic field with the receiver based on the sampling signal;
generating, with the receiver, a second signal responsive to the received first time-varying magnetic field;
transmitting the second signal from the receiver to the processor;
determining, with the processor of the headset, a first phase shift between the transmitted first time-varying magnetic field and the received first time-varying magnetic field for a plurality of frequencies of the transmitted first time-varying magnetic field;
providing a third signal to the second transmitter from the frequency synthesis field-programmable gate array;
transmitting from the second transmitter, in response to the third signal, a second time-varying magnetic field through the intracranial fluid and toward the receiver;
receiving the second time-varying magnetic field with the receiver;
generating, with the receiver, a fourth signal responsive to the received second time-varying magnetic field;
transmitting the fourth signal from the receiver to the processor;
determining, with the processor, a second phase shift between the transmitted second time-varying magnetic field and the received second time-varying magnetic field for a plurality of frequencies of the transmitted second time-varying magnetic field; and
determining, with the processor, an analysis of the intracranial fluid based on the first phase shift and the second phase shift.
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Accused Products
Abstract
A diagnostic method for monitoring changes in a fluid medium in a patient'"'"'s head. The method includes positioning a transmitter at a first location on or near the patient'"'"'s head, the transmitter generates and transmits a time-varying magnetic field into a fluid medium in the patient'"'"'s head responsive to a first signal; positioning a receiver at a second location on or near the patient'"'"'s head offset from the transmitter, the receiver generates a second signal responsive to a received magnetic field at the receiver; transmitting a time-varying magnetic field into the fluid medium in the patient'"'"'s head in response to the first signal; receiving the transmitted magnetic field; generating the second signal responsive to the received magnetic field; and determining, a phase shift between the transmitted magnetic field and the received magnetic field for a plurality of frequencies of the transmitted time-varying magnetic field.
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Citations
10 Claims
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1. A method for monitoring intracranial fluid in a patient'"'"'s head, the method comprising:
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placing a headset on the patient'"'"'s head, wherein the headset includes a first transmitter positioned at a first location on the headset, a second transmitter positioned at a second location on the headset offset from the first location, a receiver positioned at a third location on the headset offset from the first and second locations, and a processor comprising a field-programmable gate array; providing a first signal to the first transmitter from the frequency synthesis field-programmable gate array, wherein providing the first signal includes; producing, with the frequency synthesis field-programmable gate array, a square wave clock signal for generating a first time-varying magnetic field in the first transmitter and a sampling signal at an offset in frequency from the square wave clock signal; and amplifying the square wave signal; transmitting from the first transmitter, in response to the first signal, the first time-varying magnetic field through the intracranial fluid and toward the receiver; receiving the first time-varying magnetic field with the receiver based on the sampling signal; generating, with the receiver, a second signal responsive to the received first time-varying magnetic field; transmitting the second signal from the receiver to the processor; determining, with the processor of the headset, a first phase shift between the transmitted first time-varying magnetic field and the received first time-varying magnetic field for a plurality of frequencies of the transmitted first time-varying magnetic field; providing a third signal to the second transmitter from the frequency synthesis field-programmable gate array; transmitting from the second transmitter, in response to the third signal, a second time-varying magnetic field through the intracranial fluid and toward the receiver; receiving the second time-varying magnetic field with the receiver; generating, with the receiver, a fourth signal responsive to the received second time-varying magnetic field; transmitting the fourth signal from the receiver to the processor; determining, with the processor, a second phase shift between the transmitted second time-varying magnetic field and the received second time-varying magnetic field for a plurality of frequencies of the transmitted second time-varying magnetic field; and determining, with the processor, an analysis of the intracranial fluid based on the first phase shift and the second phase shift. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification