Moche Michael, Trampel Robert, Kahn Thomas, Busse Harald
Department of Diagnostic and Interventional Radiology, Leipzig University Hospital, Leipzig, Germany.
J Magn Reson Imaging. 2008 Feb;27(2):276-91. doi: 10.1002/jmri.21262.
The ongoing development of powerful magnetic resonance imaging techniques also allows for advanced possibilities to guide and control minimally invasive interventions. Various navigation concepts have been described for practically all regions of the body. The specific advantages and limitations of these concepts largely depend on the magnet design of the MR scanner and the interventional environment. Open MR scanners involve minimal patient transfer, which improves the interventional workflow and reduces the need for coregistration, ie, the mapping of spatial coordinates between imaging and intervention position. Most diagnostic scanners, in contrast, do not allow the physician to guide his instrument inside the magnet and, consequently, the patient needs to be moved out of the bore. Although adequate coregistration and navigation concepts for closed-bore scanners are technically more challenging, many developments are driven by the well-known capabilities of high-field systems and their better economic value. Advanced concepts such as multimodal overlays, augmented reality displays, and robotic assistance devices are still in their infancy but might propel the use of intraoperative navigation. The goal of this work is to give an update on MRI-based navigation and related techniques and to briefly discuss the clinical experience and limitations of some selected systems.
强大的磁共振成像技术的不断发展，也为引导和控制微创干预提供了更多先进的可能性。针对身体几乎所有部位，都描述了各种导航概念。这些概念的具体优势和局限性在很大程度上取决于磁共振扫描仪的磁体设计和介入环境。开放式磁共振扫描仪所需的患者转运极少，这改善了介入工作流程，并减少了对配准的需求，即成像与介入位置之间空间坐标的映射。相比之下，大多数诊断扫描仪不允许医生在磁体内引导其器械，因此，患者需要移出扫描孔。尽管用于闭孔扫描仪的适当配准和导航概念在技术上更具挑战性，但许多进展是由高场系统的知名能力及其更好的经济价值推动的。多模态叠加、增强现实显示和机器人辅助设备等先进概念仍处于起步阶段，但可能会推动术中导航的应用。这项工作的目的是更新基于磁共振成像的导航及相关技术，并简要讨论一些选定系统的临床经验和局限性。
