A clinical hyperthermia unit utilising an array of seven focussed ultrasonic transducers Paper entitled 'A clinical hyperthermia unit utilising an array of seven focussed ultrasonic transducers ' by K. Hynynen, D.J.Watmough, M.Shammari, G.Wilmot, M.S.N. Murthy, J.R.Mallard, *M.Fuller and **T.Sarkar, Department of Bio-Medical Physics and Bio-Engineering, University of Aberdeen * Rowett Research Institue, Bucksburn **Department of Radiology, Aberdeen Royal Infirmary and published in the Proceedings of the Ultrasonics Symposium, Institute of Electrical and Electronic Engineers, 31 October-2 November 1983. This copy is a reprint. 31 October - 2 November 1983