Robin-SLAC-invited-talk

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Present State of the Art• Fast Conformal Scanning with Volumetric Repainting• Active and Parallel scanning• Short (few minute) treatment time per field (includingrepaintings)• Large Lateral Good-Field Regions > 10cm x 10cm• Isocentric• Full 4π angular coveragePSI Gantry 2 and the HIT Gantry are the state of the art• Derivatives of the same design - Pavlovic Type
Pavlovic Type Gantry DesignRadially very compact by having the last magnet a 90 degree magnet. Allthe other magnets – quadrupoles, dipoles, and steering magnets, do nottake up additional radial space.The radial size is determined by only three things –(1) the space between the patient and the last magnet,(2) the bending radius of the 90 degree dipole, and(3) how wide that dipole is.M. Pavlovic, et al, Nucl. Inst. and Meth A 545 (2005) 412-426
Page 1 and 2: Novel Design of Gantry Optics forCa
Page 3 and 4: A Proton Therapy Center(University
Page 5 and 6: Growth Ion Beam Therapy> 60,000 p
Page 7 and 8: Cell Killing Mechanism Goal of radi
Page 9 and 10: Energy deposited by differentionizi
Page 11 and 12: Ion Beam “Scanned” over tumorTo
Page 13 and 14: Some Existing Proton GantriesPSI Ga
Page 15 and 16: ~8 m ~13 m Gantries are LargePSI-
Page 17 and 18: Heidelberg Ion Therapy (HIT) Fa
Page 19 and 20: Challenge• Advantages of gantri
Page 21 and 22: 1. Active Scanning• Active spot o
Page 23 and 24: Field Patching Large Field è Sc
Page 25 and 26: Scanning Magnets Location• Large
Page 27 and 28: Gantry Functional Specifications•
Page 29 and 30: Isocentric GantryFocal point is at
Page 31 and 32: Compact Excocentric Gantry servi
Page 33: ETOILLE (LYON) (Superconduc+ng 90
Page 37 and 38: Heidelberg Gantry and Final 90° Di
Page 39 and 40: Can the size of a carbon gantr
Page 41 and 42: Required Properties• Large Good F
Page 44 and 45: Parameters• Magnetic rigidity (40
Page 46 and 47: Correcting the linear term(First At
Page 48 and 49: Large nonlinearities and distortion
Page 54 and 55: Tracking with optimized windings
Page 56 and 57: Comparison of the two casesInitial
Page 58 and 59: Initial Estimate Size and Weight•
Page 60: Sources GENERAL • M. Pavlovic,

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