Journal of Experimental & Clinical Cancer Research 2009, 28:2 http://www.jeccr.com/content/28/1/2 TFaigrugertev1olumes and reference points Target volumes and reference points. Clinical target volume (CTV), (pink line); planning target volume (PTV), (dark-blue line); ICRUrp, the International Commission on Radiation Units and Measurements reference point; IBMCrp, the International Bone Metastasis Consensus Working Party reference point. Page 3 of 7 (page number not for citation purposes)