Radiotherapeutic physics. VII. An instrument for dosage estimation with fields of any size and shape.
In the preceding paper in this symposium the need was stressed for a system of dosage estimation with beamed radiations of more general application than those at present use, and in particular one that could be used for the routine estimation of dose with fields of irregular shape. Brief mention was made of a machine which could fulfil this function, and the purpose of the present paper is to describe more fully the construction and mode of operation of this device. The basic principle of the device is one which has been discussed by various workers—that the analysis of the way in which the dose of scattered radiation at given points on the central axis of a circular field varies with field diameter can be made the basis of the estimation of dose at any point of the volume irradiated by an irregularly shaped field. The essential procedure in this estimation has in the past been one of integration, graphical or otherwise, of a rather cumbersome nature and not well fitted for routine work. However, in the p...
Medical imaging and its technological development in relation to the treatment of cancer. The first Mayneord lecture, April 1984.
I am deeply honoured to give this, the first Mayneord Lecture of the Institute, and would like to thank the President, 3M Limited, and the Council for the invitation. I felt able to accept only because of the experience and contribution of others with whom I have worked, and whom I wish to acknowledge for their contribution and friendship. It is also a pleasure for me personally to honour in this way Professor Mayneord, who kindled my interest in medical physics and who has guided me in my approach to the subject in its widest sense. Over the past twenty or so years I have been fortunate enough to be involved in the radiotherapy work of a large cancer hospital, the Royal Marsden, and to participate in some of the rapid growth in medical imaging. This lecture is based on the experience gained during that period, placed I hope in perspective by a more northerly view following my move to a Department that is also involved in both radiotherapy and imaging, but in the context of a large general hospital and me...
Investigating the Optical properties of cd1-xznxs thin films deposited by the Dip Technique
A Thesis submitted to the Department of Physics, Kwame Nkrumah University of Science and Technology, in partial fulfillment of the requirement for the degree of 
Master of Science (Solid State Physics)