Abstract: A method for making a preparation for diagnostic radiology. The method consists of agitating a radio opaque substance and a carrier in a vessel, controlling temperature and pressure, admitting gas to the vessel and withdrawing mixture from the vessel such that dissolved gas does not fall below a level at which gas is released within the patient when the preparation is ingested.
Abstract: A diagnostic radiology preparation for injestion by patients, which preparation comprises a radio opaque substance such as barium sulphate, a carrier such as water and a dissolved and/or absorbed gas such as carbon dioxide. The gas is present in an amount such that it is released when the preparation is ingested.