A METHOD FOR OBJECTIVE EVALUATION OF FUNCTIONAL IMAGES

  • 1 January 1982
    • journal article
    • research article
    • Vol. 23  (4) , 285-290
Abstract
A method is described for characterizing functional maps by means of a frequency distribution function (DF) of pixels. The method makes use of a map of the SD of the functional parameter. By use of this map, the method becomes less sensitive to imprecise definition of the organ borders, compensates for random fluctuations in the functional map and (most importantly) permits spatial information to be included in the DF. This spatial information is included by performing spatial cluster weighting, a procedure that emphasizes regional dysfunction over global dysfunction. The method is illustrated by applying it to phase maps of the left ventricle [LV, human]. Analysis of the DF permits detection of regional abnormalities of LV wall motion. An improvement in detectability is obtained with cluster weighting.

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