胸部CTにおける吸入空気量がCT画像におよぼす影響について

概要

論文の詳細を見る
When the chest CT examination is preformed, an observation is made that the posterior side of the lung often appears higher density than the anterior side. Various explanations, from disease, physiological phenomenon, etc. are hypothesized, and examinations are conducted to determine the cause. In a normal lung, the breathed air is gradually filled from the top (relative to gravity) to the bottom, and physiologically, there is a noticeable difference in the CT values. When a deep breath is taken, air fills the whole pulmonary field, and CT values for the top and the bottom of the lung become equal. However, if a patiant has inflammation or other disease which restricts the breathed air volume to below normal, a CT value difference is observed. Therefore, the conclusion is reached that the posterior side of the normal pulmonary field having high density is caused by the subject breathing a below normal amount of air, and the pulmonary alveolar wall appearing high density.
公益社団法人日本放射線技術学会の論文
1996-04-20