Dosimetric evaluation of physical parameters for different energies in advance radiotherapy technique for Liver cancer

ABSTRACT Introduction: This work aimed to study dosimetrically compare 6MV, 10MV and dual energies (DE) photon beam in liver cancer, evaluating the effect of using different on intensity-modulated radiation (IMR) outcome were selected.IMRT treatment plans Identical optimization constraints applied for all energy plans. The parameters like angle, number beams, kept constant achieve same clinical objectives. Both qualitative quantitative methods used. many physical indices Planning Target Volume (PTV), relevant Organs at Risk (OARs) as mean dose (Dmean), maximum (Dmax), 95% (D95), integral dose, total segments, and also monitor unit (MU) applied. Materials methods: 28 virtual IMRT planning involved this study. Step-and-shoot designed. Plans depended Monaco (IMRT) plan outcome. For each case, three with geometry created 6 MV, 10 MV DE. plans, cases optimized identical objectives normalized such 98% target received 100% prescription dose. Results: techniques showed comparable PTV inhomogeneity conformity patient’s differences within median values <0.6%10 DE additionally a statistically important reduction units 14.2% (p <0.01) 13.3% compared respectively. Conclusion: Each dual had similar dosimetry characteristics.