All of the following imaging finding is diagnostic of Adenomyosis
CT - is insensitive for adenomyosis. Presence of calcifications strongly favours fibroids rather than adenomyosis.
Thickness of low signal intensity junctional zone >12mm on T2 -  weighted images.
Rain shower appearance of myometrium with coarsened echotexture.
Linear striations and subendometrial echogenic nodular appearance on USG.
Calcifications seen on CT - Scan.