Enochs W S, Ackerman R H, Kaufman J A, Candia M
Department of Radiology, Thomas Jefferson University Hospital, Philadelphia, PA, USA.
J Neuroimaging. 1998 Oct;8(4):185-90. doi: 10.1111/jon199884185.
To assess the efficacy of gadolinium (Gd)-enhanced magnetic resonance angiography (gdMRA) in overcoming signal dropout artifacts on conventional MRA (cMRA), the authors examined 13 patients with suspected neurovascular stenotic/occlusive lesions on MRA pre- and post-gadolinium enhancement. The sample consisted of 18 internal carotid artery (ICA) les ons (16 extracranial, 2 cranial). In 13 of 16 stenotic vessels, gdMRA better characterized the pathoanatomy of moderate to severe stenotic lesions, changing MRA diagnosis in 3 patients. In zero of three vessels with no flow enhancement by cMRA, the lumen remained nonvisualized on gdMRA. For an ICA lesion at the skull base, enhancement of surrounding normal structures limited the usefulness of the technique. The authors conclude that Gd MRA is a fast, accurate, and convenient noninvasive technique for documenting the morphology and severity of carotid stenotic disease, especially extracranially.
为评估钆（Gd）增强磁共振血管造影（gdMRA）在克服传统MRA（cMRA）上信号丢失伪影方面的疗效，作者对13例MRA检查前、后钆增强时疑似神经血管狭窄/闭塞性病变的患者进行了检查。样本包括18处颈内动脉（ICA）病变（16处颅外病变，2处颅内病变）。在16处狭窄血管中的13处，gdMRA能更好地描述中度至重度狭窄病变的病理解剖结构，使3例患者的MRA诊断发生改变。在cMRA显示无血流增强的3处血管中，有0处血管在gdMRA上管腔仍不可见。对于颅底的ICA病变，周围正常结构的强化限制了该技术的实用性。作者得出结论，Gd MRA是一种快速、准确且便捷的无创技术，可用于记录颈动脉狭窄疾病的形态和严重程度，尤其是颅外病变。
