MR-Based Radiotherapy

MR-Based Radiotherapy

Magnetic Resonance (MR) brings added benefits to IGRT. However, dosimetry complications can arise due to the presence of magnetic fields. Sun Nuclear offers custom solutions in support of patient and machine QA for MR-based radiotherapy.

QA for MR-Based Radiotherapy

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Selected Publications


ArcCHECK®-MR Supporting Literature

Performance of a Cylindrical Diode Array for use in a 1.5 T MR-Linac

Houweling A. et al., Physics in Medicine and Biology, 61(3) (2014)

Study examining the performance characteristics of the ArcCHECK-MR in a transverse 1.5T magnetic field.

  • “The short term reproducibility, dose linearity, dose rate dependence, field size dependence, dose per pulse dependence and inter-diode variation of the ArcCHECK-MR diodes were not influenced by the presence of a 1.5 T magnetic field. Therefore, the ArcCHECK-MR can be used for QA of patient plans in the MR-linac.”
  • No significant differences between the performance of the MR-linac and the clinical linac were observed.

A Patient-Specific Quality Assurance for the Delivery of 60Co Intensity Modulated Radiation Therapy Subject to a 0.35-T Lateral Magnetic Field

Li HH. et al., Int J Radiat Oncol Biol Phys, 91(1):65-72 (2015)

This publication reviews a patient specific dosimetry quality assurance (QA) program for IMRT using ViewRay®, the first commercial magnetic resonance imaging-guided RT device.

  • Examines the use of ArcCHECK-MR as part of a patient-specific intensity modulated radiation therapy quality assurance (QA) program for ViewRay.
  • ArcCHECK-MR measurements indicated the mean SD passing rate using 3% relative/3 mm gamma criteria was 98.9%.


IC PROFILER™- MR Supporting Literature

Performance of a Multi-axis Ionization Chamber Array in a 1.5T Magnetic Field

Smit K. et al., Physics in Medicine and Biology, 59(7) (2014)

This publication investigates the performance of the IC PROFILER, a multi-axis ionization chamber array, in a 1.5 T magnetic field.

  • The linearity, reproducibility, pulse rate frequency dependence, panel orientation and ionization chamber shape are unaffected by the magnetic field.
  • IC PROFILER dose profiles were compared with film dose profiles obtained simultaneously in the MR-linac. Deviation between the film and the IC PROFILER data was caused by the noise in the film, indicating correct performance of the IC PROFILER in the transverse 1.5 T magnetic field.

Compatible with Elekta and ViewRay® Technologies

Able to be bundled with orders
Used by Elekta and ViewRay® Development and Engineering Teams
Compatible with cobalt- and linac-based treatment delivery systems
Co-developed by ViewRay Manufacturing & Physics teams
View Ray Mounting Stand

Compatible with ViewRay-designed mounting stand