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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.
