Modern Bt Techniques - Florence 2016

Quality Parameters and Indices

The Dose Volume Histogram: The Cumulative DVH It is: 1 – {the cumulative frequency distribution of dose in a VOI (Target or OAR)}

Target

For each bin e.g. [100, 103]% = [11,50 - 11,85] Gy it is the volume of the VOI (Target or OAR) in mm³ or cm³ or % of the VOI receiving a dose value at least as high as the low bin limit, here 100%

The curve indicates how much of the volume is covered by the “required” dose value

Dose Interval divided in “bins” in cGy or Gy or %