Department of Neurosurgery, Mie University School of Medicine, Tsu, Japan 2-174.
Stroke. 2011 Mar;42(3):815-8. doi: 10.1161/STROKEAHA.110.591008. Epub 2011 Jan 27.
We developed a novel dynamic 4-dimensional CT angiography to accurately evaluate dynamics in cerebral aneurysm.
Dynamic 4-dimensional CT angiography achieved high-resolution 3-dimensional imaging with temporal resolution in a beating heart using dynamic scanning data sets reconstructed with a retrospective simulated R-R interval reconstruction algorithm.
Movie artifacts disappeared on dynamic 4-dimensional CT angiography movies of 2 kinds of stationary phantoms (titanium clips and dry bone). In the virtual pulsating aneurysm model, pulsation on the dynamic 4-dimensional CT angiography movie resembled actual movement in terms of pulsation size. In a clinical study, dynamic 4-dimensional CT angiography showed 2-type motions: pulsation and anatomic positional changes of the cerebral artery.
This newly developed 4-dimensional visualizing technique may deliver some clues to clarify the pathophysiology of cerebral aneurysms.
我们开发了一种新的动态 4 维 CT 血管造影技术，以准确评估脑动脉瘤的动力学。
动态 4 维 CT 血管造影使用回顾性模拟 R-R 间隔重建算法重建动态扫描数据集，实现了高分辨率的 3 维成像和心动周期的时间分辨率。
在 2 种静态模型（钛夹和干骨）的动态 4 维 CT 血管造影电影中，电影伪影消失。在虚拟脉动动脉瘤模型中，动态 4 维 CT 血管造影电影上的脉动与实际运动在脉动大小方面相似。在一项临床研究中，动态 4 维 CT 血管造影显示了 2 种类型的运动：脉动和脑动脉的解剖位置变化。
这种新开发的 4 维可视化技术可能为阐明脑动脉瘤的病理生理学提供一些线索。
