System and method for MRI-guided cryosurgery

• US 5,978,697 A
• Filed: 01/05/1998
• Issued: 11/02/1999
• Est. Priority Date: 01/05/1998
• Status: Expired due to Term

• Current Assignee: Galil Medical Ltd. (Boston Scientific Corporation)
• Original Assignee: Galil Medical Ltd. (Boston Scientific Corporation)
• Inventors: Maytal, Ben-Zion, Bliweis, Mordechai, Sturlesi, Gideon Even
• Primary Examiner(s): Casler, Brian L.
• Application Number:
  US09/002,923
• Time in Patent Office: 666 Days
• Field of Search: 600/411, 600/549, 600/410, 324/320, 62/51.2, 62/50.1, 62/50.2, 606/20, 606/21, 335/216
• US Class Current: 600/411
• CPC Class Codes: A61B 18/02 by cooling, e.g. cryogenic techniques devices for cooling specific reflex points of the body within cell-life limits A61H39/06
• CPC Class Codes: A61B 2090/374 NMR or MRI
• CPC Class Codes: A61B 90/37 Surgical systems with images on a monitor during operation
• CPC Class Codes: F25B 9/02 using Joule-Thompson effect; using vortex effect
• CPC Class Codes: G01R 33/285 Invasive instruments, e.g. catheters or biopsy needles, specially adapted for tracking, guiding or visualization by NMR
• CPC Class Codes: G01R 33/3806 Open magnet assemblies for improved access to the sample, e.g. C-type or U-type magnets

Abstract

System and method for performing MRI-guided cryosurgery are provided. The system includes: (a) an MRI magnet for accommodating a patient, the MRI magnet having at least one opening for enabling access of a surgeon to the patient, the MRI magnet including at least one channel extending therethrough for receiving a line member of a surgical device; (b) a surgical device, including: (i) an operating member for operating the patient; (ii) a control member for controlling the operating member, the control member being positioned externally to the MRI room; (iii) a line member having a first end connectable to the operating member and a second end connectable to said control member, wherein at least a portion of the line member is received within the channel of the MRI magnet. Preferably, the line member includes an underground portion extending through an underground channel. The MRI magnet may include an interface member for connecting the operating member thereto. Preferably, the operating member is a cryogenic probe including a Joule-Thomson heat exchanger, the line member is a gas tube, and the control member includes a gas container for providing high pressure gas to the cryogenic probe via the gas tube. Preferably, the control member includes a microprocessor for controlling the operation of said surgical device.

Claims

1. A system for MRI-guided surgery, comprising:

(a) an MRI magnet for accommodating a patient, said MRI magnet being positionable within an MRI room, said MRI magnet having at least one opening for enabling access of a surgeon to the patient, said MRI magnet including at least one channel extending therethrough for receiving a line member of a surgical device;

(b) a surgical device, including;

(i) an operating member for operating the patient;

(ii) a control member for controlling said operating member, said control member being positionable externally to the MRI room;

(iii) a line member having a first end connectable to said operating member and a second end connectable to said control member, said line member being of a length allowing positioning of said MRI magnet in the MRI room and said control member externally thereto, at least a portion of said line member is received within said channel of said MRI magnet;

thereby, enabling a surgeon to operate both said MRI magnet and said surgical device from within the MRI room.

2. The system of claim 1, wherein said MRI magnet includes an interface member for connecting said operating member to said portion of said line member received within said channel.

3. The system of claim 1, wherein said operating member is a cryogenic probe including a Joule-Thomson heat exchanger, said line member is a gas tube, and said control member includes a gas container for providing high pressure gas to said cryogenic probe via said gas tube.

4. The system of claim 3, wherein said control member includes a microprocessor for controlling the operation of said surgical device.

5. The system of claim 4, further including a display member positionable within said MRI room, said display member being electrically connected to said microprocessor for providing information relating to the operation of said surgical device.

6. The system of claim 4, wherein said cryogenic probe includes a thermal sensor electrically connected to said microprocessor.

7. The system of claim 4, wherein said cryogenic probe includes at least one switching element for controlling the operation of said cryogenic probe, said at least one switching element being electrically connected to said microprocessor.

8. A method of MRI-guided cryosurgery, comprising:

(a) providing a cryosurgery device, including;

(i) a cryogenic probe for operating a patient included, said cryogenic probe including a Joule Thomson heat exchanger;

(ii) a control member for controlling the operation of said cryogenic probe, said control member including a gas container for providing high pressure gas to said cryogenic probe; and

(iii) a gas tube for providing gas communication between said cryogenic probe and said gas container; and

(b) locating said cryogenic probe within an MRI room, locating said control member externally to said MRI room, and locating at least a portion of said gas tube within a channel extending through an MRI magnet; and

(c) co-operating said cryosurgery device and said MRI mangnet from within said MRI room to perform the MRI-guided cryosurgery.

9. The method of claim 8, further comprising the step of co-monitoring the MRI-guided cryosurgery by a display member located within said MRI room, said display member providing information relating to said cryogenic probe.

10. The method of claim 8, further comprising the step of connecting said cryogenic probe to said portion of said gas tube located within said channel by an interface element.