Accelerated 3D catheter visualization from triplanar MR projection images.
Accelerated 3D catheter visualization from triplanar MR projection images.
复制标题
从三平面 MR 投影图像加速 3D 导管可视化。
DOI：
10.1002/mrm.22370
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发表时间：
2010
影响因子：
3.3
通讯作者：
Schirra CO
中科院分区：
文献类型：
--
作者：
Schirra CO
磁共振导引插管的一个主要障碍是与可视化介入装置相关的长时间采集。因此，到目前为止提出的大多数技术都依赖于单平面成像来可视化导管。最近，基于压缩感知的加速三维(3D)成像被提出以减少采集时间。然而，使用该技术的帧速率仍然很低，并且3D重建问题产生了相当大的计算量。在X射线血管造影术中，众所周知，介入设备的形状可以从有限数量的投影图像在3D空间中得出。在这项工作中，这一事实被用来开发一种从多平面二维(2D)投影MR图像中三维可视化活动导管的方法。这对于3D MRI是有利的，因为采集的配置文件的总数减少了，从而减少了采集时间。为了进一步减少测量时间，采用了压缩感知。此外，还提出了一种新颖的单通道导管设计，该设计将螺线管尖端线圈串联与单环天线相结合，实现了尖端跟踪和形状可视化。跟踪的尖端和导管属性为压缩传感重建和随后的2D/3D曲线拟合提供了约束。在体模和活体猪实验中证明了该方法的可行性。Magn Reson Med，2010。©2010 Wiley-Liss公司。
One major obstacle for MR‐guided catheterizations is long acquisition times associated with visualizing interventional devices. Therefore, most techniques presented hitherto rely on single‐plane imaging to visualize the catheter. Recently, accelerated three‐dimensional (3D) imaging based on compressed sensing has been proposed to reduce acquisition times. However, frame rates with this technique remain low, and the 3D reconstruction problem yields a considerable computational load. In X‐ray angiography, it is well understood that the shape of interventional devices can be derived in 3D space from a limited number of projection images. In this work, this fact is exploited to develop a method for 3D visualization of active catheters from multiplanar two‐dimensional (2D) projection MR images. This is favorable to 3D MRI as the overall number of acquired profiles, and consequently the acquisition time, is reduced. To further reduce measurement times, compressed sensing is employed. Furthermore, a novel single‐channel catheter design is presented that combines a solenoidal tip coil in series with a single‐loop antenna, enabling simultaneous tip tracking and shape visualization. The tracked tip and catheter properties provide constraints for compressed sensing reconstruction and subsequent 2D/3D curve fitting. The feasibility of the method is demonstrated in phantoms and in an in vivo pig experiment. Magn Reson Med, 2010. © 2010 Wiley‐Liss, Inc.