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Incorporating in-room MR
03/01/13
• Many sites soft tissue contrast not optimal with CT
• Interest in MR
• High soft tissue contrast
• Imaging could be repeated during XRT
• Functional imaging/early response assessment
• Challenges
• Primary photon beam not affected by field but
secondary electrons experience Lorentz force
• Field also affects dose response of ionisation
chambers
• Geometric accuracy would need to be sub-mm