Patent US4798215A successfully refreshed from Google Patents.
US4798215A
Expired / Lapsed
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Hyperthermia apparatus
Assignee: BSD MEDICAL Corp A CORP OF UT
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Filing: 1986-11-28
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Granted: 1989-01-17
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Expires: 2006-11-28
Abstract
Abstract A hyperthermia apparatus includes a hyperthermia treatment subsystem, and a receiver subsystem combined to use jointly the parts common to both subsystems. The hyperthermia and receiver subsystems include, respectively, a power source and radiometer connected to a switch controlled by a central processing unit (CPU) to selectively connect either the power source and the radiometer to the common parts to complete the subsystems as follows. A power divider having output ports for feeding electromagnetic energy through a plurality of applicator circuits each circuit including a phase shifter connected to the power divider, a power regulating switch connected to the phase shifter, and an applicator connected to the power control switches. The power regulating switches are controlled also by the CPU. Thus, when the CPU connects the power source to the power divider the hyperthermia subsystem is complete for operation in the tissue heating mode; however, when the CPU connects the radiometer, the receiver subsystem is complete with the phase shifter and power divider operating as a phase focused power combiner. In a second embodiment a separate radiometer is connected to each antenna port. The received analog signals are digitized for time correlation using available algorithms in a high speed computer.
Inventors
- 👤 Paul F. Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:50
CPC Classifications
A; A61; A61N; A61N5/00; A61N5/02
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
93 words
A hyperthermia treatment apparatus comprising: a combined transmitter/receiver means for selective operation in a coherent heat mode and a coherent heat measuring mode, said combined transmitter/receiver means including a transmitter means for inducing electromagnetic energy in an electric field summing manner to a selected subcutaneous area of body tissue for heating, and a noninvasive receiver means for coherently combining blackbody radiation energy emitted from the selected subcutaneous area of the body tissue at depth indicating frequencies for measurement wherein the temperature of the selected subcutaneous area of body tissue being heated is monitored.
Claim 2
Dependent Claim
93 words
A hyperthermia treatment apparatus comprising: a combined transmitter/receiver means for selective operation in a coherent heat mode and a coherent heat measuring mode, said combined transmitter/receiver means including a transmitter means for inducing electromagnetic energy in an electric field summing manner to a selected subcutaneous area of body tissue for heating, and a noninvasive receiver means for coherently combining blackbody radiation energy emitted from the selected subcutaneous area of the body tissue at depth indicating frequencies for measurement wherein the temperature of the selected subcutaneous area of body tissue being heated is monitored.
Claim 3
Dependent Claim
162 words
A hyperthermia treatment apparatus according to claim 1 wherein the combined transmitter/receiver means includes an antenna means for surrounding a preselected area of body tissue for inducing electromagnetic wave energy in phase into the subcutaneous area of body tissue for heating, and for receiving black body radiation energy emitted by the subcutaneous area of body tissue being heated, a plurality of power channels operatively connected to the antenna means for selectively feeding electromagnetic wave energy to the antenna means, and for summing the energy received therefrom, a switching means operatively connected to the plurality of power channels, a source of electromagnetic energy and a radiometer connected to the switching means, said switching means for selectively connecting the source of electromagnetic energy and radiometer to the plurality of power channels for transmitting electromagnetic wave energy through the plurality of power channels to the antenna means and for receiving energy therefrom, respectively, for coherent operation in the heating and heated tissue temperature measuring modes.
Claim 4
Dependent Claim
54 words
A hyperthermia treatment apparatus according to claim 2 wherein the plurality of power channels each include a phase shifter connected to the antenna means and a power divider connected to the phase shifter, said phase shifter and power divider for forming a phase focused power combiner when operating in the heated temperature measuring mode.
Claim 5
Dependent Claim
92 words
A hyperthermia treatment apparatus according to claim 3 wherein the antenna means includes a plurality of applicators and each of the plurality of power channels further includes a power control means having a switching means selected from the group consisting of on-off switches, relays, variable power attenuators, and variable gain amplifiers operatively connected to and between the phase shifter and an applicator of the plurality of applicators for controlling the delivery of power to the applicators wherein the location of the target within the subcutaneous area of the body tissue is determined.
Claim 6
Dependent Claim
43 words
A hyperthermia treatment apparatus according to claim 4 wherein the combined transmitter/receiver means further includes a central processing means operatively connected to the switching means of the power control means and/or phase shifter for setting the operating point of the power control means.
Claim 7
Dependent Claim
39 words
A hyperthermia treatment apparatus according to claim 5 wherein the central processing means is further connected to the source of electromagnetic energy and radiometer for selectively connecting the source of electromagnetic energy and the radiometer to the power divider.
Claim 8
Dependent Claim
74 words
A hyperthermia treatment apparatus according to claim 2 wherein the antenna means includes first and second cylindrical dipole rings connected through the plurality of power channels to the source of electromagnetic energy and to the radiometer selectively for injecting electromagnetic wave energy into the subcutaneous area of body tissue where it sums for heating and for receiving energy emanating at a depth indicating frequency from the heated subcutaneous area for measurement by the radiometer.
Claim 9
Dependent Claim
25 words
A hyperthermia treatment apparatus according to claim 2 wherein the antenna means includes a plurality of opposing applicators connected to the plurality of power channels.
Claim 10
Dependent Claim
45 words
A hyperthermia treatment apparatus according to claim 8 wherein the plurality of power channels each include a power control means for selectively controlling the amount of electromagnetic energy applied to each applicator for selectively locating a targeted area within the subcutaneous area of body tissue.
Claim 11
Dependent Claim
24 words
A hyperthermia treatment apparatus according to claim 2 wherein the radiometer is a single channel radiometer for generating temperature data at a preselected frequency.
Claim 12
Dependent Claim
183 words
A hyperthermia treatment apparatus comprising: a power means for generating electromagnetic wave energy, measuring means for measuring coherent radiant energy, switching means connected to the power means and measuring means for switching there between, power handling means connected to the switching means, and a plurality of applicators connected to the power handling means, said power handling means for producing a preselected distribution of the electromagnetic wave energy in a preselected phase relationship for the plurality of applicators when connected to the power means and for coherently combining radiant energy received from the plurality of applicators when connected to the measuring means, and said plurality of applicators selectively connected to the power handling means for focusing the distributed electromagnetic wave energy in a tissue target area, and receiving radiant energy emanating from the tissue target area, wherein the focused energy is summed coherently for forming a hot spot in the tissue target area in a heating mode, and the radiant energy emanating from the tissue target area is combined into coherent radiant energy for measurement by the measuring means in a heat measuring mode.
Claim 13
Dependent Claim
183 words
A hyperthermia treatment apparatus comprising: a power means for generating electromagnetic wave energy, measuring means for measuring coherent radiant energy, switching means connected to the power means and measuring means for switching there between, power handling means connected to the switching means, and a plurality of applicators connected to the power handling means, said power handling means for producing a preselected distribution of the electromagnetic wave energy in a preselected phase relationship for the plurality of applicators when connected to the power means and for coherently combining radiant energy received from the plurality of applicators when connected to the measuring means, and said plurality of applicators selectively connected to the power handling means for focusing the distributed electromagnetic wave energy in a tissue target area, and receiving radiant energy emanating from the tissue target area, wherein the focused energy is summed coherently for forming a hot spot in the tissue target area in a heating mode, and the radiant energy emanating from the tissue target area is combined into coherent radiant energy for measurement by the measuring means in a heat measuring mode.
Claim 14
Dependent Claim
35 words
A hyperthermia treatment apparatus according to claim 11 further including a central processor means having means connected to the switching means for connecting selectively the power means and measuring means to the power handling means.
Claim 15
Dependent Claim
20 words
A hyperthermia treatment apparatus according to claim 11 wherein the measuring means for measuring coherent radiant energy includes a radiometer.
Claim 16
Dependent Claim
67 words
A hyperthermia treatment apparatus according to claim 11 wherein the power handling means includes a power splitter/combiner for selectively dividing and combining electromagnetic wave energy, a plurality of phase shifters connected to the power splitter/divider for phase selection, and a plurality of switching means connected to the plurality of phase shifters for controlling the delivery of electromagnetic wave energy selectively to and from the plurality of applicators.
Claim 17
Dependent Claim
29 words
A hyperthermia treatment apparatus according to claim 14 further including a central processor means having means for selectively controlling the plurality of switching means of the power handling means.
Claim 18
Dependent Claim
25 words
A hyperthermia treatment apparatus according to claim 15 wherein the central processor means includes means for controlling the phases of the plurality of phase shifters.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-17 | 1992-07-18 | 1993-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-17 | 1996-07-18 | 1997-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-17 | 2000-07-18 | 2001-01-17 | $7700.00 | Window Closed / Lapsed |