Patel K C, Duerk J L, Zhang Q, Chung Y C, Williams M, Kaczynski K, Wendt M, Lewin J S
Department of Radiology, Case Western Reserve University and University Hospitals of Cleveland, OH 44106, USA.
IEEE Trans Med Imaging. 1998 Oct;17(5):794-802. doi: 10.1109/42.736046.
Interventional magnetic resonance imaging (MRI) can be defined as the use of MR images for guiding and monitoring interventional procedures (e.g., biopsy, drainage) or minimally invasive therapy (e.g., thermal ablation). This work describes the development of a prototype graphical user interface and the appropriate software methods to accurately overlay a representation of a rigid interventional device [e.g., biopsy needle, radio-frequency (RF) probe] onto an MR image given only the probe's spatial position and orientation as determined from a three-dimensional (3-D) localizer used for interactive scan plane definition. This permits 1) "virtual tip tracking," where the probe tip location is displayed on the image without the use of separate receiver coils or a "road map" image data set, and, 2) "extending" the probe to predict its path if it were directly moved forward toward the target tissue. Further, this paper describes the design and implementation of a method to facilitate the monitoring of thermal ablation procedures by displaying and overlaying temperature maps from temperature sensitive MR acquisitions. These methods provide rapid graphical updates of probe position and temperature changes to aid the physician during the actual interventional MRI procedures without altering the usual operation of the MR imager.
介入式磁共振成像（MRI）可定义为利用磁共振图像来引导和监测介入操作（如活检、引流）或微创治疗（如热消融）。本文描述了一个原型图形用户界面的开发以及相应的软件方法，该方法能够仅根据用于交互式扫描平面定义的三维（3-D）定位器所确定的探头空间位置和方向，将刚性介入设备（如活检针、射频（RF）探头）的表示准确叠加到磁共振图像上。这允许实现：1）“虚拟针尖跟踪”，即无需使用单独的接收线圈或“路线图”图像数据集，就能在图像上显示探头针尖位置；2）“延伸”探头，以预测如果它直接向目标组织前进时的路径。此外，本文还描述了一种方法的设计与实现，该方法通过显示并叠加来自温度敏感磁共振采集的温度图，来便于监测热消融过程。这些方法能在实际介入式MRI操作过程中快速提供探头位置和温度变化的图形更新，以辅助医生，同时不改变磁共振成像仪的常规操作。
