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Fig. 8 —Kinetic curve assessment. Curve interpretation is composed of two sections: I, Initial upslope of curve can be slow (1), medium (2), or rapid (3). This period is first 2 minutes of dynamic scan or until first change in curve, depending on dynamic parameters used. II, Delayed phase comprises period after first 2 minutes or until curve starts to change. Continued increase in enhancement is persistent pattern; steady leveling in enhancement is plateau pattern; and decrease in signal intensity is washout pattern. Washout pattern and plateau pattern occurring early in dynamic study are more likely to be associated with malignancy, whereas persistent pattern is usually detected with benign lesions, such as fibroadenoma, radial scars, and lesions associated with hormonal changes.