Journal of Experimental & Clinical Cancer Research 2009, 28:2 http://www.jeccr.com/content/28/1/2 lCsaFiinniugtegmeu)lreuriinoelfairest3-linpdvegoplsedltaoefnirseieulod-srvinpofiglleaunltmdhuepslIihannitgset(torthnrgeiaratanIinmogtlnsearsoln)fBaotinoneenacMlaCseetoafmsotrmaspislsaCinononinosgentnaRsruagdseitWatviolnrukmUinengit(PPsaTarnVtyd) r(Medfaeerarkse-unbrcleuemepeloinnitnest) r(aesnqfdeuramernecsde)ualplnaodisnpttwin(coailrioscpl(eprseo)d,seind Cumulative dose-volume histograms of one case for planning target volume (PTV) (dark-blue line) and medulla spinalis (red line) in single field plan using the International Commission on Radiation Units and Meas- urements reference point (circles), in single field plan using the International Bone Metastasis Consensus Working Party reference point (squares) and two opposed anterior-posterior field plan (triangles). plans, maximum doses to the medulla spinalis were greater than 115% of the prescribed dose and in 22 of 45 (49%) plans the maximum doses were greater than 120% of the prescribed dose. In only 4 ICRUrp single field plans did the medulla spinalis receive a dose greater than 115% of the prescribed dose. In the AP-PA field plans, none of the doses to the medulla spinalis exceeded 106% of pre- scribed dose. Discussion The results of the present study showed that neither IBM- Crp nor the ICRUrp single posterior field plans accom- Page 5 of 7 (page number not for citation purposes)