Dosimetric Comparison Study of Three Dimensional Conformal Radiotherapy (3DCRT) Versus Different Intensity Modulated Radiotherapy (IMRT) Techniques in Prostate Cancer Treatment

IMRT is a well-known and widely used treatment technique for carcinoma of the prostate (PCa) because it permits dose escalation to tumour while sparing normal tissues. In Sri Lanka, along with IMRT, 3DCRT also in PCa. This study was carried out compare against Simultaneous- Integrated Boost Intensity Modulated Radiation Therapy (SIB-IMRT), Sequential Standard using dosimetric parameters such as Planning Target Volume (PTV) coverage by prescribed dose, Conformity Index (CI), Homogeneity (HI), percentage maximum, minimum mean PTV 50% volume (D50) rectum, bladder, femoral heads. Thirty-one PC patients’ plans were included study. For evaluation purposes, Dose-volume Histograms (DVHs) compared all techniques. The D50 heads showed significant difference (p < 0.05) techniques significantly greater therapy many patients. SIB-IMRT higher conformity than homogeneity critical organ technique. However, when considering other parameters, there no between IMRT.