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Title: The imaging of gamma radiation : some aspects of new and conventional techniques in medical radioisotope scanning
Author: Wilks, Robin John
Awarding Body: University of Aberdeen
Current Institution: University of Aberdeen
Date of Award: 1967
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This thesis describes the general problems involved in the 'imaging' of gamma radiation, and the techniques employed in their attempted solution. Following an introduction to the subject in Part If where conventional 'scanners' and 'cameras' are described, Part II describes a simple experimental procedure which may be undergone in order to evaluate the smallest size of 'tumour' region that may be detected under any known set of simplified clinical conditions. The visual threshold characteristics of different display systems is an integral part of this technique, and is also described in this section. Part III is concerned with a novel theoretical approach to determine the spatial variation of gamma flux impinging upon the surface of a detector. This is calculated both with and without collimators. The modification of such a flux by the particular 'image transfer system' (i.e. type of detector moving or stationary) being used. Such calculations are compared to the experimental results of section II, and are found to agree closely. Part IV describes fundamental modifications to the image transfer system of the Anger Gamma Camera---with a view to improving the uniformity of the system. An attempt to produce a sensitive high-resolution stationary detecting and imaging system is described in Part V, where an Image Intensifier is optically coupled to a flat circular scintillator toy means of a novel high efficiency lens system. Two such lenses w6re designed---one with unity magnification and the other with a range of magnification from J to I so that a maximum field of view of 8" diameter may be accomodated.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available