Enhanced systems and methods for RF-induced hyperthermia II

• US 20070250139A1
• Filed: 08/30/2005
• Published: 10/25/2007
• Est. Priority Date: 05/07/2004
• Status: Abandoned Application

• Current Assignee: Akesogenx Corp.
• Original Assignee: Akesogenx Corp.
• Inventors: Kanzius, John
• Application Number:
  US11/215,825
• Publication Number:
  US 20070250139A1
• Time in Patent Office: Days
• US Class Current: 607/100
• CPC Class Codes: A61N 1/406 using implantable thermoseeds or injected particles for localized hyperthermia preparations of seeds and particles A61K41/0052

Abstract

An RF transceiver for coupling an RF signal through a target area, having a transmission head having a transmission inductor having a first axis directed toward a target area, an RF generator capable of generating a hyperthermia-inducing RF signal having at least one component for transmission via the transmission head, the RF signal being capable of heating at least one of target cells and RF absorption enhancers associated with target cells to thermally damage the target cells, a reception head for receiving the RF signal and having a reception inductor having a second axis directed toward the target area, a first tuned circuit in circuit communication between the RF generator and the transmission head, and a second tuned circuit in circuit communication between the reception head and a load, and wherein the first and second tuned circuits cooperate with each other and the transmission and reception heads to form a high-Q circuit for coupling the RF signal through the target area. The tuned networks may be simple or elaborate pi-networks and may have tunable components to help couple a desired amount of power from the transmission head to the reception head through the target area.

Claims

1. An RF transceiver for coupling an RF signal through a target area, comprising:

(a) a transmission head having a transmission inductor having a first axis directed toward a target area;

(b) an RF generator capable of generating an RF signal having at least one component for transmission via the transmission head, the RF signal being capable of heating at least one of target cells and RF absorption enhancers associated with target cells to thermally damage the target cells;

(c) a reception head for receiving the RF signal and having a reception inductor having a second axis directed toward the target area;

(d) a first pi-network in circuit communication between the RF generator and the transmission head; and

(e) a second pi-network in circuit communication between the reception head and a load; and

(f) wherein the first and second pi-networks cooperate with each other and the transmission and reception heads to form a high-Q circuit for coupling the RF signal through the target area.

2. The RF transceiver for coupling an RF signal through a target area according to claim 1 wherein the transmission inductor and the reception inductor are arranged as co-axial end-fired inductors on opposite sides of the target area.

3. The RF transceiver for coupling an RF signal through a target area according to claim 1 wherein the transmission inductor and the reception inductor are arranged as co-axial end-fired inductors on opposite sides of the target area and wherein the transmission head and the reception head are proximate the target area.

4. The RF transceiver for coupling an RF signal through a target area according to claim 1 wherein the first and second pi-networks each comprise a classic pi-network having an inductor and a pair of capacitors, with at least one of the inductor and the capacitors being variable.

5. The RF transceiver for coupling an RF signal through a target area according to claim 2 wherein the first and second pi-networks each comprise a classic pi-network having an inductor and a pair of capacitors, with at least one of the inductor and the capacitors being variable.

6. The RF transceiver for coupling an RF signal through a target area according to claim 3 wherein the first and second pi-networks each comprise a classic pi-network having an inductor and a pair of capacitors, with at least one of the inductor and the capacitors being variable.

7. The RF transceiver for coupling an RF signal through a target area according to claim 1 wherein the transmission head and the reception head are proximate the target area.

8. The RF transceiver for coupling an RF signal through a target area according to claim 4 wherein the transmission head and the reception head are proximate the target area.

9. The RF transceiver for coupling an RF signal through a target area according to claim 1 wherein:

(a) the transmission inductor has first and second ends;

(b) the transmission head further comprises a first conductive plate directly electrically connected to the first end of the transmission inductor, the second end of the transmission inductor being free from direct electrical connection to the first conductive plate, and the second end of the transmission inductor for being disposed toward the target area;

(c) the reception inductor has first and second ends; and

(d) the reception head further comprises a second conductive plate directly electrically connected to the first end of the reception inductor, the second end of the reception inductor being free from direct electrical connection to the second conductive plate, and the second end of the reception inductor for being disposed toward the target area;

10. The RF transceiver for coupling an RF signal through a target area according to claim 9 wherein:

(a) the first conductive plate of the transmission head is arranged substantially perpendicular to the transmission inductor; and

(b) the second conductive plate of the reception head is arranged substantially perpendicular to the reception inductor.

11. The RF transceiver for coupling an RF signal through a target area according to claim 9 wherein:

(a) the transmission inductor comprises a coil inductor;

(b) the first conductive plate of the transmission head is arranged substantially perpendicular to the transmission coil inductor with the transmission coil inductor extending from a central portion of the first conductive plate;

(c) the reception inductor comprises a coil inductor; and

(d) the second conductive plate of the reception head is arranged substantially perpendicular to the reception coil inductor with the reception coil inductor extending from a central portion of the second conductive plate.

12. An RF transceiver for coupling an RF signal through a target area, comprising:

(a) a transmission head having a transmission inductor having a first axis directed toward a target area and having first and second ends, the transmission head further comprising a first conductive plate directly electrically connected to the first end of the transmission inductor, the second end of the transmission inductor being free from direct electrical connection to the first conductive plate, and the second end of the transmission inductor for being disposed toward the target area;

(b) an RF generator capable of generating an RF signal having at least one component for transmission via the transmission head, the RF signal being capable of heating at least one of target cells and RF absorption enhancers associated with target cells to thermally damage the target cells;

(c) a reception head for receiving the RF signal and having a reception inductor having a second axis directed toward the target area and having first and second ends, the reception head further comprising a second conductive plate directly electrically connected to the first end of the reception inductor, the second end of the reception inductor being free from direct electrical connection to the second conductive plate, and the second end of the reception inductor being disposed toward the target area;

(d) a first tuned circuit in circuit communication between the RF generator and the transmission head; and

(e) a second tuned circuit in circuit communication between the reception head and a load; and

(f) wherein the first and second tuned circuits cooperate with each other and the transmission and reception heads to form a high-Q circuit for coupling the RF signal through the target area.

13. The RF transceiver for coupling an RF signal through a target area according to claim 12, wherein:

(a) the first conductive plate of the transmission head is arranged substantially perpendicular to the transmission inductor; and

(b) the second conductive plate of the reception head is arranged substantially perpendicular to the reception inductor.

14. The RF transceiver for coupling an RF signal through a target area according to claim 12, wherein:

(a) the transmission inductor comprises a coil inductor;

(b) the first conductive plate of the transmission head is arranged substantially perpendicular to the transmission coil inductor with the transmission coil inductor extending from a central portion of the first conductive plate;

(c) the reception inductor comprises a coil inductor; and

(d) the second conductive plate of the reception head is arranged substantially perpendicular to the reception coil inductor with the reception coil inductor extending from a central portion of the second conductive plate.