**9.6 Test case P1: intensity modulated radiation therapy (IMRT) plan with 5 coplanar beams**

The percentage variation between planned dose and measured dose was noted as 2.44% in an indigenously designed heterogeneous pelvic phantom.

Dose distribution at axial projection on the heterogeneous phantom, Delta4 phantom, and on actual patient CT image are shown in **Figure 5a–c** respectively.

The same plan was verified by using Delta4 phantom. The gamma passing rate for test P1 was 98.4%, whereas the pass percentages of Dose-Difference (DD) and Distance-To-Agreement (DTA) were 79.5% and 97.9%, respectively shown in **Figure 5d**.
