Gamma-ray camera: Scanning by Time-of-flight in One dimension”* as developed by Marinelli in 1969-1970.
*Abu-Shumays, I. K., P. E. Hess, an L. D. Marinelli, “Regularization Unfolding of Low-gamma-ray Activity Measurements. II. Evaluation of Time-of-flight Scanning in One Dimension.” Radiological Physics Division Annual Report, Biology and Medicine: July 1960 through June 1970. Center for Human Radiobiology, R. E. Rowland, Division Director, P. F. Gustafson, Associate Division Director. Argonne National Laboratory, Argonne, Illinois. ANL-7760-Part II: pp. 154-175.