Figure 2From: An investigation of 125I seed permanent implantation for recurrent carcinoma in the head and neck after surgery and external beam radiotherapyThe dose-volume histograms of gross tumor volume after seed implantation. DVH: Dose volume histogram. The DVH is showing the target volume coverage by a certain dose level. DLV: This is the amount of the volume receiving the Defined Dose Level. D-X is defined as the minimum dose covering X% of the target volume. V-X is defined as the percent volume of the target receiving at least X% of the prescribed minimum peripheral dose (MPD).Back to article page