Constraint problems in factor analysis of dynamic structures innuclear medicine

摘要

It is shown that a principal components analysis yields images andcurves which contain negative elements and, as such, does not describethe underlying physiology. It does, however, contain the informationnecessary for distinguishing among dynamic structures. The applicationof an oblique transformation, based on the non-negativity criterion, tothe results of this analysis provides a possible solution. It is clear,however, that the use of this criterion alone will not provide a uniquesolution