Question

Pt in the PA position and OML perp to the table, a 15° to 20° caudal angulation would place petrous ridges in the lower third of orbit. To achieve same result in a baby or child, modify the angulation to

A. 10° to 15° caudal.
B. 25° to 30° caudal.
C. 15° to 20° cephalic.
D. 3° to 5° caudal.

Answer 1

For a baby or child, a 10° to 15° caudal angulation in the PA position with the OML perpendicular to the table would place the petrous ridges in the lower third of the orbit, which is a lesser angulation compared to that used in adults.

Step-by-step explanation:

To achieve the same result of placing the petrous ridges in the lower third of the orbit in a baby or child, compared to an adult where a 15° to 20° caudal angulation is used in the PA position with the OML perpendicular to the table, it's often necessary to modify the angulation due to the differences in anatomical proportions and skull morphology between children and adults. In pediatric radiology, the appropriate angulation tends to be less severe than in adults. Therefore, the correct answer to position the petrous ridges in the same location for a baby or child would be A. 10° to 15° caudal angulation.