pneumoencephalogram

Definitions of pneumoencephalogram
  1. noun
    an X ray of the brain made by replacing spinal fluid with a gas (usually oxygen) to improve contrast
    synonyms: encephalogram
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    type of:
    X ray, X-ray, X-ray photograph, X-ray picture, roentgenogram, x-ray
    a radiogram made by exposing photographic film to X rays; used in medical diagnosis
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