Radiation therapy and radiation surgery treatment system and methods of use of same

• US 6,104,779 A
• Filed: 05/26/1998
• Issued: 08/15/2000
• Est. Priority Date: 05/10/1994
• Status: Expired due to Fees

• Current Assignee: Joseph S. Shepherd, Robert W. Rand
• Original Assignee: Joseph S. Shepherd, Robert W. Rand
• Inventors: Rand, Robert W., Shepherd, Joseph S.
• Primary Examiner(s): Porta, David P.
• Application Number:
  US09/084,945
• Time in Patent Office: 812 Days
• Field of Search: 378/65, 378/68, 378/69, 378/119, 378/121, 378/124, 378/134, 378/148, 378/150, 378/203, 378/208, 378/209
• US Class Current: 378/65
• CPC Class Codes: A61B 2090/101 for stereotaxic radiosurgery
• CPC Class Codes: A61N 2005/1063 maintaining the position when the patient is moved from an imaging to a therapy system
• CPC Class Codes: A61N 5/103 Treatment planning systems
• CPC Class Codes: A61N 5/1042 with spatial modulation of the radiation beam within the treatment head
• CPC Class Codes: A61N 5/1084 for delivering multiple intersecting beams at the same time, e.g. gamma knives

Abstract

A radiosurgery and radiotherapy system to provide diagnostic imaging and target localization via a patient 3-D mapping means such as a CT scanner or MRI, patient positioning via a four degree of freedom of motion table, and a stereotactic Cobalt 60 therapy unit incorporating multiple sources to therapeutically irradiate a target is provided. Methods of radiosurgery and radiotherapy utilizing the system are also provided. A combination of radiation source configuration, 360 degree rotational characteristics of the therapy unit, and table movement will allow any size and shape of target to be irradiated to therapeutic levels while decreasing radiation exposure to surrounding healthy tissue. A radiation beam catcher which captures greater than 80% and preferably greater than 90 percent of the radiation from the radiation sources is also provided.

Claims

1. A system for administering radiation to a patient comprising:

a) a patient 3-D mapping means;

b) a radiation source beam assembly, further comprising (i) a rotatable radiation source support means, (ii) a radiation source beam unit affixed to said rotatable source means, wherein said beam unit comprises a plurality of radiation sources which are non-radially arrayed, (iii) a radiation shielding means, wherein said patient 3-D mapping means is affixed opposite the radiation source beam unit;

c) a rotating collimator which provides for the selection of spheres of radiation of varying diameters;

d) a radiation beam catcher

e) a treatment table wherein said treatment table is capable of four degrees of freedom of movements;

f) a command and control center.

2. The system for administering radiation to a patient of claim 1 further comprising an in-treatment-room control means.

3. The system for administering radiation to a patient of claim 1, wherein said patient 3-D mapping means is a CT scanner.

4. The system for administering radiation to a patient of claim 1, wherein said patient 3-D mapping means is an MRI unit.

5. The system for administering radiation to a patient of claim 1, wherein said radiation source beam unit emits radiation beams which initially intersect at a first position in space, said position in space being the treatment zone.

6. The system for administering radiation to a patient of claim 1, wherein said radiation beam catcher is comprised of side walls and a bottom defining a cavity wherein the size of the cavity is a multiple of a radiation source beam at its widest width multiplied by the longest beam length plus a constant value.

7. The system for administering radiation to a patient of claim 1, wherein said treatment table dose reduction/scatter coefficient for table attenuation is less than 1.5%.