With a patient in the pa position and the oml perpendicular to the table, a 15- to 20-degree caudal angulation would place the petrous ridges in the lower third of the orbit. to achieve the same result in a baby or a small child, it is necessary for the radiographer to modify the angulation toa 10 to 15 degrees caudalb 25 to 30 degrees caudalc 15 to 20 degrees cephalicd 3 to 5 degrees caudal