Gallucci M, De Cesare E, Amicarelli I, Splendiani A, Pavone P, Masciocchi C, Beomonte Zobel B, Passariello R
Cattedra di Radiologia dell'Università, L'Aquila.
Radiol Med. 1988 May;75(5):459-64.
Eighteen patients affected by intra-cranial aneurysms, with size ranging from 3 to 30 mm, were studied by means of MRI, CT, and angiography. MRI was performed using Spin-Echo (SE) sequences with different Repetition Times (TR) and Echo Times (TE), which allowed the characterization of the lesions in relation to the relaxation times. MRI could identify all the aneurysms. In 13 subjects the parent vessels could be seen. In 5 patients the aneurysms could be recognized only after angiography, due to their dimension (less than 4 mm). The "flow effects" and the presence of methemoglobin and hemosiderin in the thrombosed portion of the lumen allowed both the detection of flow abnormalities and the characterization of laminate intra-aneurysmal thrombosis. In conclusion, MRI appears to be a sensitive methodology in the detection of intracranial aneurysms, even more sensitive than CT and Angiography in characterizing this kind of lesions.
对18例患有颅内动脉瘤的患者进行了研究，动脉瘤大小在3至30毫米之间，采用了磁共振成像（MRI）、计算机断层扫描（CT）和血管造影术。MRI使用具有不同重复时间（TR）和回波时间（TE）的自旋回波（SE）序列进行，这使得能够根据弛豫时间对病变进行特征描述。MRI能够识别所有动脉瘤。在13名受试者中可以看到供血血管。在5名患者中，由于动脉瘤尺寸较小（小于4毫米），仅在血管造影术后才能识别。管腔内血栓形成部分的“血流效应”以及高铁血红蛋白和含铁血黄素的存在，既有助于检测血流异常，也有助于对动脉瘤内分层血栓形成进行特征描述。总之，MRI似乎是检测颅内动脉瘤的一种敏感方法，在对这类病变进行特征描述方面甚至比CT和血管造影术更敏感。
