ABSTRACT

Positioning for fronto-occipital 30-degree caudal skull projection. https://s3-euw1-ap-pe-df-pch-content-public-u.s3.eu-west-1.amazonaws.com/9781315382210/8d4c4481-6132-4e60-99e4-e8058248a27d/content/fig2_76a.jpg"/>

The patient lies supine on a trolley (or X-ray table) with the posterior aspect of the skull resting on an image receptor or gridded CR cassette.

The head is adjusted to position the median sagittal plane at right angles to the image receptor and so that it is coincident with its midline.

The orbito-meatal baseline should be perpendicular to the image receptor.