磁共振血管成像后处理新技术在脑动脉瘤诊断和治疗中的价值

目的 利用最新磁共振血管成像后处理技术诊断和观察动脉瘤。方法 经手术和血管造影证实脑动脉瘤３８例共４３个，所的病例都进行脑部磁共振成像和磁共振血管成像，血管成像序列包括三维时间飞跃法（３Ｄ ｔｉｍｅ ｏｆ ｆｌｉｇｈｔ，３Ｄ ＴＯＦ）或合并零位差值技术（ｚｅｒｏｆｉｌｌ ｉｎｔｅｒｐｏｌａｔｉｏｎ ｐｒｏｃｅｓｓｉｎｇ，ＺＩＰ），后处理技术包括常规技术即最大强度投影（ｍａｘｉｍｕｍ ｉｎｔｅｎｓｉ

New MRA postprocessing techniques in detection of intracranial aneurysms and treatment significance

Objective To assess new MRA postprocessing techniques for the detection of intracranial aneurysm and the clinical significance. Methods A total of 38 patients with 43 aneurysms surgically proven were studied 3D TOF and 3D TOF with zerofill interpoation processing (ZIP) were performed. New postprocessing techniques consist of multiplanar tomographic vaseular meonstructior (MTVR) and 3D navigator vascular imaging including exaseopic stirface rendering(ESR) and virtual intravascular endoscopy (VIE) using 3D TOF source images. Results MTVR (100.0% ) and 3D navigato(94.4% )provided better detection of small aneurysm than MIP(66.7% ) (x2 = 15 .289, P < 0.01). MTVR(90.7% ) and 3D nartgato(90.7% ) provided better visualization of the neck of the aneurysm, its location, size and morphology than source images(79.1%) and MIP(72.1%)(x2 = 4.913, P < 0.01). VIE can show the inner surface of the vessels including the true orifice, the angulation and length of the neck. Conclusion New postprocessing techniques are helpful to make plan for surgical and interventional treatment, and follow up the size and patency of the aneurysm after intravascular embolization and other therapy.