University of Alberta
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Project Milestones

2007

  • September - Electron-return Effect in Dosimetry Resolved. Reference: "Patient Dosimetry for hybrid MRI-radiotherapy systems" Medical Physics 35(3): 1019-27 (Mar 2008) PDF Download

2008

  • February - Linac Functioning
  • April - MR functioning
  • September - Image Contrast at low magnetic field Resolved
  • September - Linac operating, coupled to MR system
  • September - Magnetic Shielding Functioning & Tested
  • September - Radio Frequency Protection Tested and Functioning
  • November - MR functioning, coupled to Linac 
  • December - MR imaging during linac irradiation (World's First)

2009

  • January - Animal Images
  • March - MR image distortion correction
  • June - MR simulation tested
  • July - Radiation induced conductivity (RIC) analyzed for RF coils under irradiation
  • August - Resolution #1 to RIC signals in RF coils
  • October - RF noise from Multileaf collimator (MLC) studied and controlled

2010

  • February - Numerically calcuated design / optimization of 6 MV linac from electron gun to dose in water
  • March - Study / resolution of susceptibility-related distortions due to rotations
  • March - RF noise in MLC studied and controlled
  • March - Study the effects of longitudinal and transverse magnetic fields on linac operation
  • April - Lung dosimetry for longitudinal configuration
  • May - Development of optimization techniques for designing biplanar magnets
  • August - Design and optimize novel bored biplaner magnets
  • December - MR guided tumour tracking functioning

2011

  • February - Whole body system with transverse configured linac designed
  • August - Gantry for whole body system optimized
  • August - Magnet for Whole Body Linac-MR fabricated

2013

  • Installed the Whole Body Linac-MR v.1 into an existing vault (20 x 20 x 12 ft high) without removing and rebuilding the walls or ceiling. The MR magnet features a high temperature superconducting magnet that does not require liquid helium or a helium exhaust vent.
  • A Whole Body Linac-MR v.2 with a 60 cm (H) x 110 cm (W) patient gap is being constructed.

2014

  • July - Acquired the first good MR images of a human subject with the Whole Body Linac-MR v.1.
  • Clinical Linac-MR System v.1 (0.6T MR, 6MV, 60cm gap).