Sorger Hanne, Hofstad Erlend Fagertun, Amundsen Tore, Langø Thomas, Leira Håkon Olav
Department of Thoracic Medicine, St. Olavs Hospital, Postboks 3250, Sluppen, 7006, Trondheim, Norway.
Department of Circulation and Medical Imaging, Faculty of Medicine, Norwegian University of Science and Technology (NTNU), AHL-senteret, Prinsesse Kristinas gate 3, Trondheim, Norway.
Int J Comput Assist Radiol Surg. 2016 Aug;11(8):1431-43. doi: 10.1007/s11548-015-1326-7. Epub 2015 Nov 28.
Endobronchial ultrasound transbronchial needle aspiration (EBUS-TBNA) of mediastinal lymph nodes is essential for lung cancer staging and distinction between curative and palliative treatment. Precise sampling is crucial. Navigation and multimodal imaging may improve the efficiency of EBUS-TBNA. We demonstrate a novel EBUS-TBNA navigation system in a dedicated airway phantom.
Using a convex probe EBUS bronchoscope (CP-EBUS) with an integrated sensor for electromagnetic (EM) position tracking, we performed navigated CP-EBUS in a phantom. Preoperative computed tomography (CT) and real-time ultrasound (US) images were integrated into a navigation platform for EM navigated bronchoscopy. The coordinates of targets in CT and US volumes were registered in the navigation system, and the position deviation was calculated.
The system visualized all tumor models and displayed their fused CT and US images in correct positions in the navigation system. Navigating the EBUS bronchoscope was fast and easy. Mean error observed between US and CT positions for 11 target lesions (37 measurements) was [Formula: see text] mm, maximum error was 5.9 mm.
The feasibility of our novel navigated CP-EBUS system was successfully demonstrated. An EBUS navigation system is needed to meet future requirements of precise mediastinal lymph node mapping, and provides new opportunities for procedure documentation in EBUS-TBNA.
纵隔淋巴结的支气管内超声引导经支气管针吸活检(EBUS-TBNA)对于肺癌分期以及区分根治性和姑息性治疗至关重要。精确采样至关重要。导航和多模态成像可能会提高EBUS-TBNA的效率。我们在专用气道模型中展示了一种新型的EBUS-TBNA导航系统。
使用带有用于电磁(EM)位置跟踪的集成传感器的凸探头EBUS支气管镜(CP-EBUS),我们在模型中进行了导航CP-EBUS操作。术前计算机断层扫描(CT)和实时超声(US)图像被整合到一个用于EM导航支气管镜检查的导航平台中。CT和US容积中目标的坐标在导航系统中进行配准,并计算位置偏差。
该系统可视化了所有肿瘤模型,并在导航系统中正确的位置显示了它们融合的CT和US图像。操作EBUS支气管镜快速且容易。11个目标病变(37次测量)的US和CT位置之间观察到的平均误差为[公式:见原文]毫米,最大误差为5.9毫米。
我们新型的导航CP-EBUS系统的可行性得到了成功证明。需要一种EBUS导航系统来满足未来精确纵隔淋巴结定位的要求,并为EBUS-TBNA中的操作记录提供新的机会。