Aortic Imaging: Your Questions Answered
10:05-12:14
Then the next technique I want to show are images of thoracic aorta but remember how the tissue is looking here. This is a non-contrast CT so there is no contrast that we have administered externally. The contrast you're getting between the tissues are because of differences in the tissues itself like this black area is air and this grayish area is tissue and the the thing I've measured is the aorta.
こちらは胸部大動脈のCT画像です。造影剤は使っていませんが、濃淡があります。黒い部分は空気、グレーの部分は組織です。十字の赤いラインの部分が大動脈で、太さを計測しています。
Very frequently, this is, this may be one test that somebody gets for evaluation of lung, lungs or something else and they find out they have an aneurysm so this becomes like, almost like after an echo a screening test done for something else and serendipitously they find their aorta is kind of enlarged and then they get a contrast study after this.
肺の検査などでは、造影剤を使わないCT検査が多くなりますが、その際に動脈瘤が見つかることがあります。心エコーで問題が見つかって、詳細な検査が必要となるのと同様に、CTで大動脈の拡大が偶然見つかった場合には、造影CTをおこなうことになります。
And how does a contrast study look? This is how it looks and I'm showing you images here of the aortic root in the sense that the level of the aortic valve right above it and how do we measure the aortic root by different techniques.
こちらが造影CTの画像です。左上の画像は大動脈弁を上からみた大動脈基部と計測の様子を示しています。
On the left panel are two different kinds of measurements these are standardized methods. One on top is what I usually use but one at the bottom is also used by physicians who repeatedly measure. As long as the technique of measurements is the same every time somebody gets scanned it's a reliable. On a CT you can see how well when you give contrast you can differentiate between one area of the aorta versus the heart and versus where the contrast is not there.
一番左の列の画像は、標準的な計測法を示しています。左上の画像は私が通常計測をおこなう方法で、下から2番目の画像は、何度も計測をおこなう場合に使われる方法です。計測法に関しては、計測の度に同じ方法を使うのであれば問題ありません。造影CTでは、大動脈と心臓、それ以外とがはっきりと区別できます。
And on the right panel here you have the valve opened. You can see that here in this image here where my arrow is pointing, the valve is open. Sometimes we measure with the valve closed is the technique most people follow but some institutions follow with when they measure using the valve open. There are slight differences not a huge difference in measurements when this is done but as long as the repeated methods of measurements are the same it's, it's fine.
右側の画像は大動脈弁が開いた状態の画像です。マウスカーソルで示されている部分で、弁が開いているのがわかると思います。ほとんどの場合、弁を閉じた状態で計測しますが、一部の医療機関では弁を開いたままで計測します。計測値の違いはわずかにありますが、測定方法が統一されていれば、問題はありません。
The Marfan Foundation did not participate in the translation of these materials and does not in any way endorse them. If you are interested in this topic, please refer to our website, Marfan.org, for materials approved by our Professional Advisory Board.
The Marfan Foundation は、当翻訳には関与しておらず、翻訳内容に関してはいかなる承認も行っておりません。このトピックに興味をお持ちの方は、Marfan.org にアクセスし、当協会の専門家から成る諮問委員会が承認した内容をご参照ください。
