Research Masterclass in Radiotherapy Physics 2017

B Oborn, Med. Phys. 2015 Dose calculation incl. MR specific fringe fields

p(90 MeV, B=0) 1T inline 1T perp.

Field rotation Field deflection

Beam scanning important to correct online for the effects!

To do: Simulation including scanning magnets

No optimization yet

Oliver Jäkel

Medical Physics

Page 21

Fast beam trajectory prediction in heterogeneous media Experimental proof‐of‐principle: First „ in magneto“ film dosimetry  in slab phantom   Hoffmann et al ., HZDR at OncoRay (Dresden)

Monte Carlo simulation

Measurement setup

E = 140 MeV B = 1 T

Y

M

C

F

M

Y = yoke M = permanent magnets (1 T) F = film in PMMA slab phantom C    = collimator  (  5 mm)

EBT3 film measurement

Page 22

Dr. Aswin L. Hoffmann I HZDR I Institute of Radiooncology I aswin.hoffmann@hzdr.de Member of the Helmholtz Association