Treatment Planning
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DVH

Direct histogram disaplys the volume of the organ that receives dose within each dose bin.

  • Most useful for display of the dose-to-target volumes
dvh-direct.jpg

Cumulative DVH integrates the direct histogram.

  • Most commonly used in radiotherapy.
  • point on the curve represents the volume of an organ that receives a given dose or greater.
dvh-cumulative.jpg

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Differential DVH compares DVHs formed with different dose bin sizes, because theo volume contained in any dose bin chagnes as the dose bin size chagnes.
Plots (1/Dbin)*DV/DD.

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