脳動静脈奇形に関する研究—3．Dynamic CTによる循環動態の検討

Arteriovenous Malformation: 3.Dynamic CT of arteriovenous malformation

I．はじめに

　X線CTスキャンの進歩に伴い，スキャン時間，スキャン間隔の短縮による高速スキャンが可能となり，dy—namic CTを用いて循環動態の評価が可能となってきた．

　一方，脳動静脈奇形（以下AVMと略す）における循環動態の検討は，1948年Shenkin^25）の報告以来，主にアイソトープを利用した循環動態の報告がいくつか認められる^{5,10,11,15-17,20,23,24,27,28）}．しかしながら，AVMの循環動態の把握は，これらを用いた方法でも必ずしも容易ではなく，未解決の部分も少なくない．

Various methods have been reported for the purpose of measurement of hemodynamics of the cerebral arteriovenous malformations.

In this paper, using a TCT-60A-30 scanner, dy-namic computed tomography was performed on 18 cases with arteriovenous malfo:mations. The initial scan of the dynamic CT was started simultaneously with the start of an intravenous injection of uniodinated contrast medium (8 ml/sec.), serial 4.5 sec. scan repeated 8 times. The data for each scan were segmented into three, and a series of 24 rapid-sequence scan images (CT-angiography) was generated.