Comparison of Coincidence Counting and Focusing Collimators with Various Isotopes in Brain Tumour Detection

1 July 1964

journal article
research article
Published by Oxford University Press (OUP) in The British Journal of Radiology

Vol. 37 (439) , 531-543
https://doi.org/10.1259/0007-1285-37-439-531

Abstract

Coincidence counting and focusing collimators with different isotopes are compared for detection of brain tumours with external scanning. A modification of Dewey and Sinclair's (1961) figure of merit for the best compromise between resolution and sensitivity for detection of the tumour is measured experimentally using spherical glass bulbs in a tank of water, to represent tumours in the head. The probabilities of detecting tumours of different sizes are calculated for different isotopes making certain assumptions. It is concluded that ⁷⁴As or ⁷²As with focusing collimators are better than the other isotopes investigated for detection of brain tumours. ¹²⁵I is not suitable.

Keywords

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