2017_IGRT course book

Challenge: MR image acquisition affected by linac

• By radio frequency (RF) artefacts from beam generation

JMRI 38:268-287 (2013)

RF artefacts (not from a linac)

• By distortions due to • Magnetic objects close to the magnetic field • Eddy currents induced by moving (magnetic) objects (Gantry, MLC)

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