Material inserts for radiation therapy

Patent metadata

Field	Value
Publication number	US-2023191154-A1
Application number	US-202318109608-A
Country	US
Kind code	A1
Filing date	Feb 14, 2023
Priority date	Jul 21, 2017
Publication date	Jun 22, 2023
Grant date	—

Abstract

A system for treating a patient during radiation therapy is disclosed. The system includes a shell, a plurality of material inserts disposed in the shell, where each material insert of the plurality of material inserts respectively shapes a distribution of a dose delivered to the patient by a respective beam of a plurality of beams emitted from a nozzle of a radiation treatment system, and a scaffold component disposed in the shell that holds the plurality material inserts in place relative to the patient such that each material insert lies on a path of at least one of the beams.

First claim

What is claimed is:

1 . A computer-implemented method of radiation treatment planning, the method comprising:
accessing, from a memory of a computer system, parameters for a radiation treatment plan, the parameters comprising a number of beams and beam paths relative to a position of a patient; and identifying locations on the patient for a plurality of material inserts disposed in a cranial immobilization device, wherein each material insert of the plurality of material inserts lies on at least one of the beam paths based on the treatment plan, and wherein each material insert has a non-uniform thickness measured in a direction of the path of the respective beam for range modulation of the respective beam to deliver a dose distribution between respective distal and proximal portions of a target in the patient prescribed in the radiation treatment plan.

2 . The method of claim 1 , further comprising:
determining number, shape, size and type of material of each of the plurality of material inserts for the range modulation to deliver the dose distribution between the respective distal and proximal portions of the target in the patient prescribed in the radiation treatment plan.

3 . The method of claim 1 , further comprising:
fabricating the plurality of material inserts for the range modulation to deliver the dose distribution between the respective distal and proximal portions of the target in the patient prescribed in the radiation treatment plan.

4 . The method of claim 1 , wherein each of the plurality of material inserts comprise at least one of: a range compensator; a range modulator; and a collimator.

5 . The method of claim 1 , wherein the beams comprise beams selected from the group consisting of: proton beams; and ion beams, and wherein each material insert of the plurality of material inserts is configured to locate a Bragg peak of the at least one beam inside a target in the patient at a predetermined position in accordance with the treatment plan.

6 . The method of claim 1 , wherein the plurality of material inserts are supported by a scaffold disposed in the cranial immobilization device.

7 . The method of claim 6 , further comprising:
accessing, from the memory of the computer system, a printing plan for the immobilization device; and controlling a three-dimensional printer using the printing plan to fabricate the scaffold, wherein the scaffold comprises holes for accommodating the plurality of material inserts based on the locations on the patient for the plurality of material inserts disposed in the cranial immobilization device.

8 . The method of claim 1 , wherein the immobilization device is operable to cover a head and limits movement of the patient relative to the beams.

9 . The method of claim 1 , wherein the plurality of material inserts comprise ridge filters.

Assignees

• Varian Med Sys Inc
• Varian Medical Systems Int Ag
• Varian Medical Systems Particle Therapy Gmbh & Co Kg

Inventors

• Abel Eric
• Zankowski Corey
• Perez Jessica
• Magliari Anthony
• Smith Christel
• Folkerts Michael
• Hansen Bill
• Vanderstraeten Reynald
• Koponen Timo

Classifications

• A61N2005/1096

  Elements inserted into the radiation path placed on the patient, e.g. bags, bolus, compensators · CPC title

• A61N2005/1087

  Ions; Protons · CPC title

• A61N5/1065

  Beam adjustment · CPC title

• A61N5/1077 Primary

  Beam delivery systems · CPC title

• A61N2005/1097

  Means for immobilizing the patient · CPC title