Mini C-Arm Rentals in Portland, ME. The capabilities and performance of Siemens mobile C-arms have established them as cutting-edge systems. These units are used in traditional applications like orthopedics, or in the growing areas of vascular intervention, gastrointestinal surgery or minimally invasive procedures and intraoperative. Soma Technology carries professionally new and refurbished Siemens Equipment in Portland, Lewiston, Bangor, South Portland and all of Maine.