Sathyanarayana Shashank, Aksit Pelin, Arepally Aravind, Karmarkar Parag V, Solaiyappan Meiyappan, Atalar Ergin
Department of Electrical and Computer Engineering, Johns Hopkins University, Baltimore, Maryland, USA.
J Magn Reson Imaging. 2007 Aug;26(2):386-91. doi: 10.1002/jmri.20960.
To determine and track the planar orientation of active interventional devices without using localizing RF microcoils.
An image-based tracking method that determines a device's orientation using projection images was developed. An automated and a manual detection scheme were implemented. The method was demonstrated in an in vivo mesocaval puncture procedure in swine, which required accurate orientation of an active transvascular needle catheter.
The plane of the catheter was determined using two projection images. The scan plane was adjusted automatically to follow the catheter plane, and its orientation with respect to a previously acquired target plane was displayed. The algorithm facilitated navigation for a fast and accurate puncture.
Using image-based techniques, with no mechanical design changes, the orientation of an active intravascular probe could be tracked.
在不使用定位射频微线圈的情况下确定并追踪有源介入设备的平面方向。
开发了一种基于图像的追踪方法，该方法利用投影图像确定设备的方向。实施了自动和手动检测方案。该方法在猪的体内肠系膜上静脉穿刺手术中得到了验证，该手术需要精确确定有源经血管穿刺针导管的方向。
利用两幅投影图像确定了导管的平面。扫描平面会自动调整以跟随导管平面，并显示其相对于先前获取的目标平面的方向。该算法有助于实现快速准确穿刺的导航。
使用基于图像的技术，无需对机械设计进行更改，就可以追踪有源血管内探头的方向。
