Bakker C J, Hoogeveen R M, Weber J, van Vaals J J, Viergever M A, Mali W P
Department of Radiology, University Hospital Utrect, The Netherlands.
Magn Reson Med. 1996 Dec;36(6):816-20. doi: 10.1002/mrm.1910360603.
This paper reports the development of dedicated catheters and real-time MR scan techniques for guiding vascular interventional procedures. By way of phantom experiments, it is shown that proper modification of the magnetic properties of catheters allows their conspicuous and consistent visualization in subsecond 2D gradient echo images and phase contrast angiograms. Dynamic scan times as low as 0.5 s could be achieved by exploiting the keyhole technique and purposeful postprocessing. The temporal resolution and spatial resolution of the resultant scan protocol shows promise for adequate tracking of catheter manipulation.
本文报道了用于引导血管介入手术的专用导管和实时磁共振扫描技术的发展。通过体模实验表明，对导管的磁特性进行适当修改可使其在亚秒级二维梯度回波图像和相位对比血管造影中清晰且一致地显示。通过利用锁孔技术和有针对性的后处理，可实现低至0.5秒的动态扫描时间。所得扫描协议的时间分辨率和空间分辨率显示出有望对导管操作进行充分跟踪。
