In Waters method, the mentomeatal line (MML) is oriented how relative to the IR?

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Multiple Choice

In Waters method, the mentomeatal line (MML) is oriented how relative to the IR?

Explanation:
In the Waters projection, the mentomeatal line is oriented perpendicular to the image receptor. This setup positions the facial bones so that the maxillary sinuses are demonstrated without the petrous ridges obscuring them, and it keeps distortion and magnification consistent by aligning the central ray to the IR. In this orientation, the anatomy is projected in the intended plane, giving a clear view of the maxillary sinuses.

In the Waters projection, the mentomeatal line is oriented perpendicular to the image receptor. This setup positions the facial bones so that the maxillary sinuses are demonstrated without the petrous ridges obscuring them, and it keeps distortion and magnification consistent by aligning the central ray to the IR. In this orientation, the anatomy is projected in the intended plane, giving a clear view of the maxillary sinuses.

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