8.3 - Megavoltage photon beam profiles
This video describes the physics behind megavoltage beam profiles, including:
Measurement of beam profiles
Normalisation of beam profiles
Off axis ratios (OARs)
Definition of field size
Calculation of beam flatness
Calculation of beam symmetry
Influences on beam penumbra - source size, collimator edge, beam energy, head scatter
Dose horns - including effect of depth
Oblique incidence
Very small field sizes
Видео 8.3 - Megavoltage photon beam profiles канала ROscribbles
Measurement of beam profiles
Normalisation of beam profiles
Off axis ratios (OARs)
Definition of field size
Calculation of beam flatness
Calculation of beam symmetry
Influences on beam penumbra - source size, collimator edge, beam energy, head scatter
Dose horns - including effect of depth
Oblique incidence
Very small field sizes
Видео 8.3 - Megavoltage photon beam profiles канала ROscribbles
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