Intraarterial Digital Subtraction Angiography

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Abstract
Using digital electronic techniques it is possible to process the video signal from a conventional image intensified fluoroscopic system so as to allow isolation and amplification of a small iodine signal produced after the intravascular injection of contrast medium. Such a device has been in use in our department for the last two years, primarily for performance of intravenous arteriography. More recently, we have been using the apparatus to perform arteriography after injection of the iodinated contrast medium directly into the arterial system. In this report the technique, advantages and limitations of such an approach will be discussed.
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