Aspects of direct (positional) sagittal CT scanning of the brain with respect to clinical findings.

In 1981 a new method for obtaining direct sagittal CT scans of the brain has been introduced in our clinic. This way of examination avoids the disadvantages involved in mathematical reconstruction technique, such as prolonged examination time, as a consequence of multiple thin or overlapping sections at specific preselected sites, increased radiation dose to the patient, decreased radiographic tube life, time-consuming "postprocessing", inferior topography as a result of small image stripes, decreased spatial resolution and greater susceptibility to patient motion.