腦血管疾病是國人健康的大敵，除了是前三大死因外，更是青壯年人口失能與殘障的一大主因；而且其嚴重性隨著國內老年人口增加，有上升的趨勢。最常見的腦血管疾病就是顱內動脈瘤破裂所導致的蜘蛛膜下腔出血(Subarachnoid Hemorrhage, SAH)。SAH 死亡率極高，即便存活病患也往往留下嚴重後遺症。因此積極控制或治療前述的致病因素最直接的作法就是找出顱內動脈瘤所在位置，施以適當的處置，以防範未然。本研究目的為對於疑似顱內微小動脈瘤患者利用三維旋轉血管造影術(Three Dimensional Rotation Angiography，3DRA)來評估診斷動脈瘤的位置、形狀、大小的診療價值。

Cerebrovascular disease is a huge health impact for general population in Taiwan. It is the top three leading causes of death and contributes to the major cause of disabilities in young population. It has been observed that the severity of the disease increases with the growing of the elderly population. One of the most common cerebrovascular disease is the subarachnoid hemorrhage (SAH) caused by the intracranial aneurysms rupture. Aneurysmal SAH is associated with high mortality rate and severe sequel even if the patient is survived from the incidence. The primary prevention for aneurismal SAH is focused on the detection of the unruptured intracranial aneurysms and appropriate management after throughout evaluation. To evaluate the clinical significance of assessing the intracranial micro-aneurysms by using the three-dimensional rotational angiography (3DRA).
A total of 76 intracranial aneurysms were found in the 61 patients. The advantage of the 3DRA is providing the multiplanar reconstruction display of the target lesion by using single injection of the contrast medium in single study. The total amount of the radiation dosage and the contrast agent injection in the 3DRA is much lower than the conventional DSA. For the intracranial micro-aneurysms and other vascular lesions, the detailed anatomical information include the size of the aneurysm sac, growth direction, the neck width and length can be clearly demonstrated in the 3DRA, especially for the complex lesions. Furthermore, the 3DRA can provide the optimal working plane for the endovascular treatment and therefore contribute to the appropriate treatment planning. The 3DRA not only raises the success rate of the surgical and endovascular treatment for the intracranial aneurysms but also lowers the complication rate and has become an important image modality in post-treatment follow up.