1. The midsagittal plane of the patientÕs head is parallel to the film which touches the side of the patientÕs head to be radiographed.
   
   
2. The center of the x-ray beam enters the opposite side from a point approximately two inches superior and one inch posterior to the superior border of the external auditory meatus and is directed posteroanteriorly through the condyle to be radiographed.

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