Little Rock C-Arm System Rentals-OEC 9400 C-Arm Imagining System For Rent In Arkansas C-Arm Rentals in Little Rock, AR. The OEC 9400 C-Arm rental is the oldest model of the OEC line offered, however the system is a great unit for practices with low budgets that need a c-arm capable of performing basic fluoro procedures. Heartland Medical Sales and Service is a distributor of Used and Refurbished C-Arm Imaging System rentals in Little Rock, Fort Smith, Fayetteville, Springdale, Arkansas