US4448198A
Expired / Lapsed
US
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Invasive hyperthermia apparatus and method
Assignee: BSD Medical Corp
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Filing: 1981-09-24
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Granted: 1984-05-15
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Expires: 2001-09-24
Abstract
Abstract Invasive hyperthermia apparatus includes an electromagnetic energy radiation source, and a plurality of applicators. Each applicator is adapted for insertion into body tissue and radiating electromagnetic energy therein. Interconnected between the applicators and the radiation source are a power splitter and a plurality of line stretchers for providing the applicator with electromagnetic energy in a preselected frequency - phase power relationship. The applicators, power splitter and line stretchers are operative for causing constructive interference between emitted electromagnetic radiation when the applicators are inserted into body tissue in a preselected spaced apart relationship.
Inventors
- 👤 Paul F. Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:27
CPC Classifications
A; A61; A61N; A61N5/00; A61N5/02; A61N1/00; A61N1/18; A61N1/32; A61N1/323; A61B; A61B18/00; A61B2018/00636; A61B2018/00696; A61B2018/0075
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
96 words
Electromagnetic hyperthermia apparatus for heating local regions within body tissue comprising: (a) a source of electromagnetic radiation; (b) a plurality of electromagnetic energy radiating applicators, wherein said applicators are inserted into the body tissue in a preselected pattern, and further wherein said applicators are substantially parallel; and (c) means interconnected between the radiation source and each of said applicators for continuously providing each said applicator with electromagnetic energy having the same frequency and preselected relative phase and power relationships, wherein the radiation emitted by said applicators undergoes constructive interference in the local region to be heated.
Claim 2
Dependent Claim
96 words
Electromagnetic hyperthermia apparatus for heating local regions within body tissue comprising: (a) a source of electromagnetic radiation; (b) a plurality of electromagnetic energy radiating applicators, wherein said applicators are inserted into the body tissue in a preselected pattern, and further wherein said applicators are substantially parallel; and (c) means interconnected between the radiation source and each of said applicators for continuously providing each said applicator with electromagnetic energy having the same frequency and preselected relative phase and power relationships, wherein the radiation emitted by said applicators undergoes constructive interference in the local region to be heated.
Claim 3
Dependent Claim
31 words
The hyperthermia apparatus of claim 1, wherein said interconnected means comprises a power splitter, wherein the electromagnetic energy supplied to each of said applicators has the same relative phase and power.
Claim 4
Dependent Claim
44 words
The hyperthermia apparatus of claim 1, wherein said interconnected means comprises; a power splitter coupled to said applicators and to said source; and means coupled to said power splitter for controlling the relative phase of the electromagnetic energy applied to each of said applicators.
Claim 5
Dependent Claim
16 words
The hyperthermia apparatus of claim 3, wherein said controlling means comprises a plurality of line stretchers.
Claim 6
Dependent Claim
26 words
The hyperthermia apparatus of claim 3, wherein said controlling means comprises means for continuously varying the relative phase of the electromagnetic energy applied to said applicators.
Claim 7
Dependent Claim
20 words
The hyperthermia apparatus of claim 1, wherein said applicators are spaced so as to define the circumference of a circle.
Claim 8
Dependent Claim
28 words
The hyperthermia apparatus of claim 6, wherein the diameter of the cicle is no more than approximately three-quaters of a wavelength of the electromagnetic radiation in the tissue.
Claim 9
Dependent Claim
53 words
Electromagnetic hyperthermia apparatus for heating local regions within body tissue, comprising: a source of electromagnetic radiation; a plurality of individual electromagnetic energy radiators suitable for substantially parallel insertion into the body tissue so as to define points equally spaced on the circumference of a circle; a power splitter coupled to said source; and
Claim 10
Dependent Claim
53 words
Electromagnetic hyperthermia apparatus for heating local regions within body tissue, comprising: a source of electromagnetic radiation; a plurality of individual electromagnetic energy radiators suitable for substantially parallel insertion into the body tissue so as to define points equally spaced on the circumference of a circle; a power splitter coupled to said source; and
Claim 11
Dependent Claim
29 words
a plurality of line stretchers coupled between said power splitter and said applicators, wherein the relative phase of energy supplied to said applicators is controlled by said line stretchers.
Claim 12
Dependent Claim
29 words
a plurality of line stretchers coupled between said power splitter and said applicators, wherein the relative phase of energy supplied to said applicators is controlled by said line stretchers.
Claim 13
Independent Claim
60 words
A method for heating local regions within body tissue with electromagnetic radiation, comprising the steps of: (a) inserting a plurality of electromagnetic energy radiating applicators into the body tissue in a substantially parallel, spaced apart relationship; and (b) simultaneously providing all of the applicators with electromagnetic energy having aligned fields, the same frequency, and preselected relative phase and power relationships.
Claim 14
Independent Claim
60 words
A method for heating local regions within body tissue with electromagnetic radiation, comprising the steps of: (a) inserting a plurality of electromagnetic energy radiating applicators into the body tissue in a substantially parallel, spaced apart relationship; and (b) simultaneously providing all of the applicators with electromagnetic energy having aligned fields, the same frequency, and preselected relative phase and power relationships.
Claim 15
Dependent Claim
29 words
The method of claim 9, wherein step (b) comprises the step of simultaneously providing all of the applicators with electromagnetic energy having the same frequenc, relative phase and power.
Claim 16
Dependent Claim
24 words
The method of claim 9 further comprising the step of: (c) continuously varying the relative phase of the electromagnetic energy provided to the applicators.
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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) | 1987-05-15 | 1987-11-14 | 1988-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-15 | 1991-11-14 | 1992-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-15 | 1995-11-14 | 1996-05-15 | $7700.00 | Window Closed / Lapsed |