Abstract: The present disclosure is directed to an extension device to be affixed to table in a radiology laboratory to hold a patient thereon. It is formed of sheet material and is transparent to x-rays. At the upper end, there is a head portion having a width and length to support a cushion to thereby enable a patient to rest on the cushion. The cushion is preferably circular with a central opening so that the patient can rest face down as required and the sheet member includes an opening therebelow. The trunk of the patient is support on the main portion which has a width sufficient to hold the patient thereon. Left and right clamps releasably secure the device on a table. Cushions are attached with strips of Velcro. Lengthwise runners on the lower side attach the device in a locked position on an x-ray table.