For the submentovertex projection,the patient is positioned with the nose and forehead touching the receptor.The central ray is directed at a zero-degree vertical angulation,aimed at the external occipital protuberance.For the posteroanterior projection,the cassette is positioned on the vertex of the patient's skull,and the central ray is directed from underneath the patient's chin (menton)perpendicular to the cassette.
A)Both statements are true.
B)Both statements are false.
C)First statement is true,second is false.
D)First statement is false,second is true.

Question

Quizplus · Accepted Answer

Both statements are false. In the submentovertex projection, the patient's head is tilted back so that the vertex is closest to the receptor, and the central ray is directed from below the chin. In the posteroanterior projection, the patient's forehead and nose touch the receptor, and the central ray is directed from the back of the head.

For the Submentovertex Projection,the Patient Is Positioned with the Nose