All preparations

The patient can either be positioned on a radiolucent table or a Maquet table, prone on two horizontally placed padded bolsters (one at the level of the sternum and the other one at the level of anterior iliac spine or on a frame.

The patient is placed on a radiolucent table or a Maquet table in a supine position.

The neck is put into a slight hyperextension by placing a pillow under the shoulders.

The patient is positioned on a radiolucent table, prone on two horizontally placed padded bolsters (one at the level of the sternum and the other at the level of the anterior iliac spine) or on a frame.

The patient is placed on a radiolucent table in a supine position.

A urinary catheter should be inserted before beginning the procedure.