ABSTRACT
Q. 1. a. 18FDG is an analogue of glucose labelled with 18F. b. FDG enters and takes part in biochemical pathways in exactly the same way as glucose. c. Malignant tumours show as hot spots with FDG PET because they generally have a higher glycolytic rate than normal tissues. d. Brain tumours commonly show as relative cold spots. e. The degree of uptake of FDG into a primary brain tumour correlates well with the histological grade of tumour.
