Particle therapy with magnetic resonance imaging

Patent metadata

Field	Value
Publication number	US-10413751-B2
Application number	US-201715445832-A
Country	US
Kind code	B2
Filing date	Feb 28, 2017
Priority date	Mar 2, 2016
Publication date	Sep 17, 2019
Grant date	Sep 17, 2019

Abstract

Particle radiation therapy and planning utilizing magnetic resonance imaging (MRI) data. Radiation therapy prescription information and patient MRI data can be received and a radiation therapy treatment plan can be determined for use with a particle beam. The treatment plan can utilize the radiation therapy prescription information and the patient MRI data to account for interaction properties of soft tissues in the patient through which the particle beam passes. Patient MRI data may be received from a magnetic resonance imaging system integrated with the particle radiation therapy system. MRI data acquired during treatment may also be utilized to modify or optimize the particle radiation therapy treatment.

First claim

What is claimed is:

1. A radiation therapy system comprising:
a particle therapy delivery system for delivery of radiation therapy to a patient via a particle beam;
a magnetic resonance imaging system configured to obtain patient magnetic resonance imaging (MRI) data during the radiation therapy; and
a controller configured to:
receive radiation therapy beam information during the radiation therapy;
receive the patient MRI data during the radiation therapy;
utilize the patient MRI data and the radiation therapy beam information to perform real-time calculations of a location of dose deposition for the particle beam, taking into account interaction properties of soft tissues through which the particle beam passes; and
determine a biological effectiveness of dose delivered to the soft tissues by the particle beam through utilization of the patient magnetic resonance imaging data.

2. The radiation therapy system of claim 1 , the controller further configured to utilize the patient MRI data and the radiation therapy beam information to calculate accumulated dose deposition to the patient during the radiation therapy.

3. The radiation therapy system of claim 2 , the controller further configured to re-optimize the radiation therapy based on the calculated dose deposition.

4. The radiation therapy system of claim 3 , further comprising:
a dosimetry system for monitoring the radiation therapy to the patient; and,
a magnetic shielding structure surrounding at least a portion of the dosimetry system.

5. The radiation therapy system of claim 4 , wherein the magnetic shielding structure comprises a plurality of shells.

6. A radiation therapy system comprising:
a particle therapy delivery system for delivery of radiation therapy to a patient via a particle beam;
a magnetic resonance imaging system configured to obtain patient magnetic resonance imaging (MRI) data during the radiation therapy;
a controller configured to:
receive radiation therapy beam information during the radiation therapy;
receive the patient MRI data during the radiation therapy; and
utilize the patient MRI data and the radiation therapy beam information to perform real-time calculations of a location of dose deposition for the particle beam, taking into account interaction properties of soft tissues through which the particle beam passes;

a dosimetry system for monitoring the radiation therapy to the patient; and
a magnetic shielding structure surrounding at least a portion of the dosimetry system.

7. The radiation therapy system of claim 6 , wherein the magnetic shielding structure comprises a plurality of shells.

8. The radiation therapy system of claim 6 , the controller further configured to utilize the patient MRI data and the radiation therapy beam information to calculate accumulated dose deposition to the patient during the radiation therapy.

9. The radiation therapy system of claim 8 , the controller further configured to re-optimize the radiation therapy based on the calculated dose deposition.

10. A non-transitory computer program product storing instructions that, when executed by at least one programmable processor forming part of at least one computing system, cause the at least one programmable processor to perform operations comprising:
receiving radiation therapy beam information for radiation therapy of a patient utilizing a particle beam;
obtaining patient magnetic resonance imaging (MRI) data during the radiation therapy;
utilizing the patient MRI data and the radiation therapy beam information to perform real-time calculations of a location of dose deposition for the particle beam, taking into account interaction properties of soft tissues through which the particle beam passes;
interrupting the particle beam if the real-time calculations of the location of dose deposition indicate that dose deposition is occurring off-target;
utilizing the patient MRI data and the radiation therapy beam information to calculate accumulated dose deposition to the patient during the radiation therapy; and
re-optimizing the radiation therapy based on the calculated dose deposition.

11. The computer program product of claim 10 , the operations further comprising taking into account influence of a magnetic field produced by the MRI system on the particle beam in performing the real-time calculations of location of dose deposition.

12. A non-transitory computer program product storing instructions that, when executed by at least one programmable processor forming part of at least one computing system, cause the at least one programmable processor to perform operations comprising:
receiving radiation therapy beam information for radiation therapy of a patient utilizing a particle beam;
obtaining patient magnetic resonance imaging (MRI) data during the radiation therapy;
utilizing the patient MRI data and the radiation therapy beam information to perform real-time calculations of a location of dose deposition for the particle beam, taking into account interaction properties of soft tissues through which the particle beam passes;
adjusting an energy of the particle beam if the real-time calculations of the location of dose deposition indicate that dose deposition is occurring off-target;
utilizing the patient MRI data and the radiation therapy beam information to calculate accumulated dose deposition to the patient during the radiation therapy; and
re-optimizing the radiation therapy based on the calculated dose deposition.

13. The computer program product of claim 12 , the operations further comprising taking into account influence of a magnetic field produced by the MRI system on the particle beam in performing the real-time calculations of location of dose deposition.

14. A radiation therapy system comprising:
a particle therapy delivery system for delivery of radiation therapy to a patient via a particle beam;
a magnetic resonance imaging system configured to obtain patient magnetic resonance imaging (MRI) data during the radiation therapy; and
a controller configured to:
receive radiation therapy beam information during the radiation therapy;
obtain the patient MRI data during the radiation therapy;
utilize the patient MRI data and the radiation therapy beam information to perform real-time calculations of a location of dose deposition for the particle beam, taking into account interaction properties of soft tissues through which the particle beam passes;
interrupt the particle beam if the real-time calculations of the location of dose deposition indicate that dose deposition is occurring off-target;
utilize the patient MRI data and the radiation therapy beam information to calculate accumulated dose deposition to the patient during the radiation therapy; and
re-optimize the radiation therapy based on the calculated dose deposition.

15. The radiation therapy system of claim 14 , the controller configured to take into account influence of a magnetic field produced by the MM system on the particle beam in performing the real-time calculations of location of dose deposition.

16. A radiation therapy system comprising:
a particle therapy delivery system for delivery of radiation therapy to a patient via a particle beam;
a magnetic resonance imaging system configured to obtain patient magnetic resonance imaging (MRI) data during the radiation therapy; and
a controller configured to:
receive radiation therapy beam information during the radiation therapy;
obtain the patient MRI data during the radiation therapy;
utilize the patient MRI data and the radiation therapy beam information t

Assignees

• Viewray Tech Inc

Inventors

• Dempsey James F
• Shvartsman Shmaryu M
• Kawrykow Iwan

Classifications

• A61N2005/1061

  using an x-ray imaging system having a separate imaging source · CPC title

• A61N2005/1055

  using magnetic resonance imaging [MRI] · CPC title

• A61N5/1049

  for verifying the position of the patient with respect to the radiation beam · CPC title

• A61N5/1038 Primary

  taking into account previously administered plans applied to the same patient, i.e. adaptive radiotherapy · CPC title

• A61N5/1071

  for verifying the dose delivered by the treatment plan · CPC title