Abstract
Conventional basilar projection of the skull is ordinarilly taken at suspensible position. Since this positioning gives patients much anxiety and pain, so it is difficult to obtain a satisfactory radiogram, especially in the case of aged people and infants. Then, we have tried basilar projection of the skull at lateral position, that is, we rotate a patient laterally to an angle 90 degrees to the couch surface and turn his face sideways. We use a fixing device of the meatal type on this occasion. And the patient sticks out his chin slightly. We expose X-rays in submento-vertical projection in this way. Moreover, we set a film parallel to anthropological plane, and the central X-ray is vertically exposed to this plane. We have obtained excellent radiograms using a cross-grid. The model of fixing device of the meatal type we used is made of foam styrol, wood, an aluminum plate and an acrylic board.
