Real-time reconstruction for MR Angiography

该研究项目的目的是开发基本技术，以在血管介入中用MR成像取代目前使用的X射线成像。因此，我们开发了快速MR图像采集和重建技术，以真实的实时可视化器械的运动。快速投影脉冲序列，我们可以证明，三维可视化的解剖结构是可能的立体显示器和专用MR序列modifies.Within这个项目的延续快速立体MR成像的有前途的结果应继续直接应用于MR系统的MR引导血管内介入的控制和监督。此外，血管的运动场将通过从MR相位对比数据中提取运动信息以及使用有源catheters.The的位置测量来估计，该延续提案的目的是通过将先前开发的投影成像与完全MR兼容的3D监视器相结合，为复杂的介入手术创建一个功能齐全的监督系统。通过整合从MR原始数据中提取的相位对比数据的运动信息，几乎没有时间损失，将为其他项目合作伙伴提供用于重建3D模型的额外信息。通过与具有来自主动导管跟踪的位置信息的相位对比数据进行比较，将开发一致性测试，以避免仪器位置的编码错误。

The aim of this research project is the development of basic technologies to replace the currently used X-ray imaging by MR imaging in vascular interventions. Therefore, we have developed fast MR image acquisition and reconstruction techniques to visualize the movement of instruments in real time. With fast projection pulse sequences we could show that a 3D visualization of the anatomy is possible with a stereoscopic displays and dedicated MR sequence modifications.Within this project continuation the promising results of the fast stereoscopic MR imaging shall be continued to apply them directly at the MR system for the control and supervision of an MR-guided intravascular intervention. In addition, the motion field of the blood vessels will be estimated by extracting motion information from both MR phase contrast data as well as position measurements with active catheters.The aim of this continuation proposal is to create a fully functional supervision system for complex interventional procedures by a combination of the previously developed projection imaging with a fully MR-compatible 3D monitor. By integration of the motion information from phase contrast data which can be extracted from the MR raw data with nearly no time penalty, additional information for the reconstruction of 3D models will be provided to the other project partners. By comparison with the phase contrast data with position information from active catheter tracking consistency tests will be developed to avoid encoding errors of the instrument position.