A 56 year old female is diagnosed with FIGO Stage IB1 adenoc…

A 56 year old female is diagnosed with FIGO Stage IB1 adenocarcinoma of the Endometrium. Radical hysterectomy with node dissection was performed. 0/13 nodes tested positive. Therefore the radiation oncologist prescribes 45 Gy EBRT to the hysterectomy bed and pelvic regional nodes, followed by a brachytherapy boost. The department CT scanner is broken and isn’t expected to be working for a few days. The Attending requests a conventional simulation. What would be the superior border using a 4 field technique (Box)?