Since its inception (Hounsfield, 1973), computerised tomography (CT) has become an invaluable diagnostic and research tool, particularly in clinical neurology and neurosurgery. Clinically, CT has proved useful in differentiating between ‘functional’ and ‘organic’ psychiatric disorders where it is particularly helpful in the diagnosis of potentially treatable organic disorders. For example, Owens et al (1980) found clinically unsuspected intracranial pathology in 12 of 136 chronic schizophrenic patients examined by CT and Roberts & Lishman (1984) found diagnosis, management, and/or prognosis were influenced in approximately 12% of cases referred by psychiatrists for CT imagining.
Computerised tomography guided lumbar sympathectomy
