text_1: 4-year-old girl with an ear infection last week, treated with Augmentin.  Doctor X saw her yesterday and noted marked tenderness of the mastoid.  He (study physician) started looking in the index of a reference and I (investigator) asked him what the question was.  He said, "What imaging study would be indicated?"
text_2: What imaging is indicated for this 4-year-old with suspected mastoiditis?