Patient specific beam control assembly of a cancer therapy apparatus and method of use thereof

• US 9,744,380 B2
• Filed: 07/11/2016
• Issued: 08/29/2017
• Est. Priority Date: 05/22/2008
• Status: Active Grant

• Current Assignee: ProTom International Holding Corporation
• Original Assignee: Daniel J. Raymond, Stephen L. Spotts, Susan L. Michaud
• Inventors: Michaud, Susan L., Raymond, Daniel J., Spotts, Stephen L.
• Primary Examiner(s): SMYTH, ANDREW P
• Application Number:
  US15/207,245
• Publication Number:
  US 20160317838A1
• Time in Patent Office: 414 Days
• Field of Search: None
• CPC Class Codes: A61B 6/03 Computed tomography [CT] echo-tomography A61B8/14
• CPC Class Codes: A61B 6/032 Transmission computed tomography [CT]
• CPC Class Codes: A61B 6/4216 using storage phosphor screens
• CPC Class Codes: A61B 6/4258 for detecting non x-ray radiation, e.g. gamma radiation A61B6/037 takes precedence
• CPC Class Codes: A61B 6/5205 involving processing of raw data to produce diagnostic data
• CPC Class Codes: A61N 2005/1054 using a portal imaging system
• CPC Class Codes: A61N 2005/1087 Ions; Protons
• CPC Class Codes: A61N 2005/1095 Elements inserted into the radiation path within the system, e.g. filters or wedges
• CPC Class Codes: A61N 2005/1097 Means for immobilizing the patient
• CPC Class Codes: A61N 5/1037 taking into account the movement of the target, e.g. 4D-image based planning
• CPC Class Codes: A61N 5/1039 using functional images, e.g. PET or MRI
• CPC Class Codes: A61N 5/1044 with multiple repetitions of the scanning pattern
• CPC Class Codes: A61N 5/1067 in real time, i.e. during treatment
• CPC Class Codes: A61N 5/1069 Target adjustment, e.g. moving the patient support
• CPC Class Codes: A61N 5/107 in real time, i.e. during treatment
• CPC Class Codes: A61N 5/1077 Beam delivery systems
• CPC Class Codes: A61N 5/1081 Rotating beam systems with a specific mechanical construction, e.g. gantries
• CPC Class Codes: A61N 5/1082 having multiple beam rotation axes
• CPC Class Codes: G21K 1/08 Deviation, concentration or focusing of the beam by electric or magnetic means electron-optical arrangements in electric discharge tubes H01J29/46; details, e.g. electric or magnetic deviating means for direct voltage accelerators or in accelerators using single pulses H05H5/02; arrangements for injecting particles into orbits H05H7/08; arrangements for ejecting particles from orbits H05H7/10
• CPC Class Codes: G21K 5/04 with beam-forming means

Abstract

The invention comprises a patient specific tray insert removably inserted into a tray frame to form a beam control tray assembly, which is removably inserted into a slot of a tray receiver assembly proximate a gantry nozzle of a charged particle cancer treatment system. Optionally, multiple tray inserts, each used to control a different beam state parameter, are inserted into corresponding slots of the tray receiver assembly where the multiple inserts are used to control beam intensity, shape, focus, and/or energy. The beam control tray assembling includes an identifier, such as an electromechanical identifier, of the particular insert type, which is communicated to a main controller, such as via the tray receiver assembly along with slot position and/or patient information.

Claims

1. A method for controlling a charged particle beam state of a positively charged particle beam in a cancer treatment system used to treat a tumor of a patient, comprising the steps of:

maintaining identification information about the patient and a beam state control parameter in an electromechanical identifier of a beam control assembly;

inserting said beam control assembly into a receiving element of a tray assembly receiver;

coupling an electromechanical receptor of said tray assembly with said electromechanical identifier;

placing at least a center aperture of said tray assembly receiver in the positively charged particle beam; and

using said electromechanical identifier of said tray assembly receiver, communicating to the cancer treatment system the identification information and said beam state control parameter.

2. The method of claim 1, further comprising the step of:

installing a patient specific tray into said beam control assembly, said patient specific tray comprising said electromechanical identifier.

3. The method of claim 2, said step of communicating further comprising the step of:

said tray assembly receiver communicating a position of said patient specific tray to a controller of said cancer treatment system.

4. The method of claim 3, said step of placing further comprising the step of:

using an operator control pendant to move said tray assembly receiver relative to an exit nozzle of a beam transport system linked to a synchrotron of the cancer therapy system.

5. The method of claim 1, said step of inserting further comprising the steps of:

installing a patient specific range shifter insert into a first tray of said beam control assembly, said patient specific range shifter insert comprising a material used to control a depth of penetration of the positively charged particle beam into the patient;

installing a patient specific ridge filter insert into a second tray of said beam control assembly, said ridge filter insert altering shape of the positively charged particle beam as a function of depth in the patient; and

installing into a third tray of said beam control assembly a third tray insert comprising any of;

an aperture insert;

a compensator insert, said compensator insert comprising a fixed thickness and fixed density material slowing the positively charged particles by a known amount; and

a blank insert.

6. The method of claim 5, further comprising the steps of:

communicating to said beam control assembly all of;

said identification about the patient using a first tray communicator attached to said patient specific range shifter insert;

said identification about the patient using a second tray communicator attached to said patient specific ridge filter insert; and

information about said third tray insert using a third tray communicator attached to said third insert.

7. The method of claim 6, said step of communicating further comprising the step of:

sending to a controller of the cancer therapy system;

(1) a first position associated with said patient specific range shifter and (2) a second position associated with said patient specific ridge filter.

8. The method of claim 6, said step of placing further comprising the step of:

retracting said tray assembly receiver along a longitudinal beam axis of the positively charged particle beam away from a treatment position of the patient.

9. The method of claim 8, said step of retracting controlled using an operator pendant.

10. The method of claim 1, further comprising the step of:

facilitating regulatory approval of an update of said method for controlling the charged particle beam state by directly interfacing a treatment delivery control system of said cancer therapy system to said method for controlling the charged particle beam state of the positively charged particle beam.

11. An apparatus for controlling a charged particle beam state of a positively charged particle beam in cancer treatment system used to treat a tumor of a patient, comprising:

a beam control assembly comprising an electromechanical identifier, said electromechanical identifier comprising identification information about both the patient and a beam state control parameter; and

a tray assembly receiver, said tray assembly receiver comprising;

a receiving element for receipt of said beam control assembly; and

an electromechanical receptor configured to couple to said electromechanical identifier,

at least an aperture of said tray assembly receiver positioned in the positively charged particle beam during use, and

said tray assembly receiver configured to communicate to the cancer treatment system the identification information and said beam state control parameter.

12. The apparatus of claim 11, said beam control assembly further comprising:

a first tray comprising said electromechanical identifier.

13. The apparatus of claim 12, said first tray comprising:

a patient specific ridge filter insert insertable into said first tray, said patient specific ridge filter insert comprising a material, said material comprising a shape and density configured to shape a beam as a function of depth in the patient during use.

14. The apparatus of claim 12, said beam control assembly further comprising:

a second tray, a patient specific aperture insert insertable into said second tray, said patient specific aperture insert controlling a cross-section shape of the positively charged particle beam during use.

15. The apparatus of claim 14, said beam control assembly further comprising:

a third tray configured to replaceably receive at least one of;

a range shifter insert comprising a material of known density and thickness for reducing energy of the positively charged particles by a known amount during use;

a compensator insert;

a transparent thermoplastic insert; and

a blank insert.

16. The apparatus of claim 11, said tray assembly receiver further comprising:

a first slot configured to receive said beam control assembly, said beam control assembly comprising a first beam state controlling insert;

a second slot configured to receive a second beam control assembly, said second beam control assembly comprising a second beam state controlling insert; and

a third slot configured to receive a third beam control assembly, said third beam control assembly comprising a third beam state controlling insert.

17. The apparatus of claim 16,

said first beam state controlling insert rigidly coupled to a first tray assembly, said first tray assembly comprising a first element of said electromechanical identifier;

said second beam state controlling insert rigidly coupled to a second tray assembly;

said second tray assembly comprising a second element of said electromechanical identifier; and

said third beam state controlling insert rigidly coupled to a third tray assembly, said third tray assembly comprising a third element of said electromechanical identifier.

18. The apparatus of claim 15, said second tray and said third tray each configured to insert, at separate times, into a first slot of said tray assembly receiver.

19. The apparatus of claim 15, wherein said second tray comprises a first mechanical stop distinct in shape from a second mechanical stop of said third tray, wherein a first receiving slot of said tray assembly receiver couples with said first mechanical stop and does not couple with said second mechanical stop.

20. The apparatus of claim 12, wherein said electromechanical receptor configured to couple to said electromechanical identifier further comprises:

a first electrical communication connection between said first tray and said beam control assembly; and

a second electrical communication connection between said beam control assembly and said tray assembly receiver.