- 期刊
The Use of 3D-CT Angiography to Measure the Normal Angle Formed by the Aorta and the SMA : The Value and Application of 3D-CT Angiography in SMA Syndrome
以三度空間之電腦斷層血管攝影測量腹主動脈與上腸繫膜動脈之間的正常角度：三度空間之電腦斷層血管攝影對於上腸繫膜動脈症候群之價值
摘要
背景 上腸繫膜動脈症候群是一少見的疾病，此症候群在內視鏡及傳統的放射線學檢查結果通常是正常的。過去，放射線學上對於上腸繫膜動脈症候群的診斷主要是依據上腸胃道攝影及傳統的侵入性血管攝影檢查。但是血管攝影是一具有侵入性的檢查。此研究的目的是要描述以非侵入性的檢查，也就是利用電腦斷層血管攝影及三度空間電腦斷層血管攝影重組的技術來測量腹主動脈與上腸繫膜動脈之間的正常角度，藉此提供一項診斷上腸繫膜動脈症候群之依據。 方法 從1999年七月至2000年六月之間，共有96位病患前來接受此檢查。其中有二位病人是因有上腸繫膜動脈症候群的症狀，其餘的94位病患則因其它的原因。我們利用電腦斷層血管攝影及三度空間電腦斷層血管攝影重組的技術來測量腹主動脈與上腸繫膜動脈之間的角度。 結果 利用此技術，可以可靠地以三度空間電腦斷層血管攝影重組的技術來顯示出主動脈與上腸繫膜動脈之間的角度。測得的主動脈與上腸繫膜動脈之間的平均正常角度為45°(範圍， 23°至85°)。在上賜繫膜動脈症候群的病患中為15°(範圍，14°至16°)。 結論對於高度懷疑為上腸繫膜動脈症候群的病患，螺旋電腦斷層血管攝影及三度空間電腦斷層血管攝影重組的技術是一可靠的診斷工具。它具有安全，快速，且不具侵入性的好處。
並列摘要
Objectives. Superior mesenteric artery (SMA) syndrome is a rare clinical disease. Diagnosis is often inconclusive as findings by endoscopic and roentgenographic methods are often normal. Hypotonic duodenography combined with simultaneous SMA arteriography has been suggested as the most efficient radiologic technique, although the angiographic procedure is invasive﹒The purpose of this study was to describe a non-invasive procedure that consists of CT angiography with 3D reconstruction to measure the angle between the aorta and the SMA in a normal group of patients. Methods. From July 1999 to June 2000, 2 patients with symptoms of SMA syndrome and 94 patients with other disorders were studied. We measured the aortomesenteric angle by CT angiography and three-dimensional computed tomographic (3D-CT) reconstruction. Results. 3D-CTA reliably displayed the angle between the aorta and the SMA. The mean measured aorta-SMA angle was 450 (range,23°To 85°) in the normal group, and 15°(range, 14° to 16°) in the patient group, respectively. Conclusions. Helical CT angiography combined with 3D reconstruction plays a diagnostic role similar to that of conventional angiography in patients with a classic clinical presentation suggestive of superior mesenteric artery syndrome. 3D-CT angiography is a safe, rapid, and relatively noninvasive technique.