Portland Hospital Equipment Rentals-Ziehm Vision C-Arm Rental Maine Ziehm Surgical C-Arm rentals in Portland, ME. The Ziehm Vision C-Arm Rental is unique in the fact that it offers Ziehm’s new flat panel image intensifier on the Vision FD model, while the Vision R model only has standard image intensifier. KenQuest Medical Equipment Rentals is a distributor of surgical equipment like this C-Arm rental in Portland, Lewiston, Bangor, South Portland, Maine.