- Obsolete technique of radiographic representation of the brain. See pneumoencephalography. [encephalo- + G. grapho, to write]- gamma e. imaging of the encephalon by the administration of small amounts of gamma-emitting radiopharmaceuticals; term may be used to refer to any number of particular studies ( e.g., cerebral perfusion scintigraphy, cerebral neuroreceptor imaging) depending on the radiopharmaceutical used.
* * *en·ceph·a·log·ra·phy in-.sef-ə-'läg-rə-fē n, pl -phies radiography of the brain after the cerebrospinal fluid has been replaced by a gas (as air)en·ceph·a·lo·graph·ic -lə-'graf-ik adjen·ceph·a·lo·graph·i·cal·ly -i-k(ə-)lē adv
* * *n.any of various techniques for recording the structure of the brain or the activity of the brain cells. Examples are echoencephalography, electroencephalography, and pneumoencephalography.
* * *en·ceph·a·log·ra·phy (en-sef″ə-logґrə-fe) [encephalo- + -graphy] radiography demonstrating the intracranial fluid-containing spaces after the withdrawal of cerebrospinal fluid and introduction of air or other gas; it includes pneumoencephalography and ventriculography.
Medical dictionary. 2011.