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KERNEL TILTING AND HARDENING
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Both pencil beam and convolution
algorithms
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Divergence
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Depth and off-axis spectral changes
Liu et al. Correcting kernel tilting and hardening in convolution/superposition dose calculations
for clinical divergent and polychromatic photon beams. Med. Phys. 24:1729-1741 (1997).
Slide from Dr. James Bedford
ESTRO physics course,
June 2017