Radiologists please answer. how do you diagnose placental abruption?

Abruption: The diagnosis of a placental abruption is made through clinical signs and symptoms. It is not usually seen with imaging.

They can't: Abruption is not always seen on ultrasound. Typically it is associated with bleeding, cramping or painful contractions, or significant pain. It's also the diagnosis of exclusion if all other reasons of bleeding are eliminated. Radiologist can usually see a large placental separation, but rarely is this the first sign of an abruption. Ct scans & mris are not used for this purpose. I hope this helps.