Abstract
In functional imaging (Kaihara et al. 1969, MacIntyre et al. 1970) the temporal variation in count-rate associated with each image element of a dynamic study is described by a few indices. By displaying the index value at the same spatial location as the count-rate information from which it was derived, data from a large number of image frames forming a dynamic study can be compressed into a small number of images. At the present time preliminary studies suggest that the indices the authors calculate provide an accurate measure of hepatogram shape and that one or more will show appreciable change in different pathological conditions thus providing a method for distinguishing between them. An extended study is required to define those ares in which it may improve the diagnostic accuracy of cholescintigraphy.
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