#$%^&*AU2019200271A120190815.pdf#####ABSTRACT Systems and methods can include a system for positioning an ultrasound probe proximal to anatomy of a patient on a radiation couch including a substantially planar base including engagement features to directly or indirectly index the substantially planar base to the radiation couch and a centrally located guide extending longitudinally along a top side of the base, a probe holder, configured to be coupled to, to translate longitudinally, and to be useraccessed and user-controlled from within, a central region of the substantially planar base, a clamp, configured to localize the probe holder at a specified location along a translation path in the central region of the substantially planar base, leg supports shaped to accommodate a patient's legs from behind, the pair of leg supports being shaped and arranged to provide a space therebetween that can accommodate an ultrasound probe holder. Attorney Docket No. 4186.025US1 39SERIAL NO.: 15/898,486 DOCKET NO.: 4186.025US1 REPLACEMENT SHEET 1/18 cc0oC q z co C C J coco a coc a)U a-0 CU >; 0 CU QU C) .- >;4 E~C) c cu cu i'i 0)0 00 E.E 03 EE 00 L.DC 41~U' c______