PURPOSE: The objective of this work is to evaluate and compare Large field IMRT and RapidArc planning for @entity189 . METHODS: In this study, ten @entity1 of Cervix with para-aotic node have been selected with @entity343 length 35+2cm. All plans were generated in Eclipse TPS V10.0 with Dynamic IMRT and RapidArc technique using 6MV photon energy. In IMRT planning, 7 fields were chosen to get optimal plan and in RapidArc, double Full arc clockwise and counter clockwise were used for planning. All the plans were generated with single isocenter and calculated using AAA dose algorithm. For all the cases the prescribed dose to @entity343 was same and the plan acceptance criteria is; 95% of the @entity343 volume should receive 100% prescribed dose. The tolerance doses for the OAR's is also taken in to account. The evaluation criteria used for analysis are; 1) Homogeneity Index, 2) Conformity Index, 3) Mean Dose to OAR's, 4)Total monitor units delivered. RESULTS: DVH analysis were performed for both IMRT and RapidArc planning. In both the plans, 95% of @entity343 volume receives prescribed dose and maximum dose are less than 107%. The conformity index are same in both the techniques. The mean Homogeneity index are 1.036 and 1.053 for IMRT and RapidArc plan. The mean (mean + SD) dose of bladder and rectum in IMRT is 44.2+1.55, 42.05+2.52 and RapidArc is 46.66+1.6, 44.2+2.75 respectively. There is no significant difference found in Right Femoral head, Left Femoral head and Kidney doses. It is found that total MU's are more in IMRT compared with RapidArc planning. CONCLUSION: In the case of cervix with Para-arotic node single isocenter irradiation, IMRT planning in large-field is better compared to RapidArc planning in terms of Homogeneity Index and mean dose of Bladder and Rectum.

SU-E-T-393: Evaluation of Large Field IMRT Versus RapidArc Planning for XXXX with Para-Aotic Node Irradiation.

@entity1 :: ('9606', 'Species') :: ['patients'] @entity343 :: ('187978', 'Species') :: ['PTV'] @entity189 :: ('MESH:D002277', 'Disease') :: ['Carcinoma Cervix and Para-aotic node irradiation']
@entity189 :: (MESH:D002277,Disease) :: ['Carcinoma Cervix']
