Teleradiology or the interpretation of facsimile roentgenograms obtained from distant sources by telephone or radio, has been used continuously since 1947. Following the initial trial of this system between Chester County Hospital, West Chester, Pa., and Philadelphia, a circuit was established over busy commercial telephone channels between the Ventnor Clinic in Atlantic City, N. J., and Philadelphia, a distance of 60 miles.
Reference : Gershon-Cohen, J., and Cooley, A. G.: Roentgenographic Facsimile: A Rapid Accurate Method for Reproducing Roentgenograms at a Distance via Wire or Radio Transmission , Am. J. Roentgenol. 61:557-559 ( (April) ) 1949.