Kühnel Christian, Freesmeyer Martin, Gühne Falk, Schreiber Leonie, Schrott Steffen, Popp Reno, Seifert Philipp
Clinic of Nuclear Medicine, Jena University Hospital, Am Klinikum 1, 07747 Jena, Germany.
eZono AG, 07743 Jena, Germany.
Sensors (Basel). 2025 Jun 30;25(13):4102. doi: 10.3390/s25134102.
It has been demonstrated that needle guidance systems can enhance the precision and safety of ultrasound-guided punctures in human medicine. Systems that permit the utilization of commercially available standard needles, instead of those that necessitate the acquisition of costly, proprietary needles, are of particular interest. The objective of this phantom study is to evaluate the reliability and accuracy of magnet-based ultrasound needle guidance systems, which superimpose the position of the needle tip and a predictive trajectory line on the live ultrasound image. We conducted fine-needle aspiration cytology of thyroid nodules. The needles utilized in these procedures are of a slender gauge (21-27G), with lengths ranging from 40 to 80 mm. A dedicated training workstation with integrated software-based analyses of the movement of the needle tip was utilized in 240 standardized phantom punctures (angle: 45°; target depth: 20 mm). No system failures occurred, and the target achieved its aim in all cases. The analysis of the software revealed stable procedural parameters with minor relative deviations from the predefined reference values regarding the distance of needle tip movement (-4.2% to +6.7%), needle tilt (-6.4% to +9.6%), and penetration depth (-7.5% to +4.5%). These deviations appeared to increase with the use of thin needles and, to a lesser extent, long needles. They are attributed to the slight bending of the needle inside the (phantom) tissue. The training workstation we employed is thus suitable for use in educational settings. Nevertheless, in intricate clinical puncture scenarios-for instance, in the case of unfavorable localized small lesions near critical anatomical structures, particularly those involving thin needles-caution is advised, and the system should not be relied upon exclusively.
已经证明，针引导系统可以提高人类医学中超声引导穿刺的精度和安全性。允许使用市售标准针的系统，而不是那些需要购置昂贵的专用针的系统，尤其令人感兴趣。本模型研究的目的是评估基于磁体的超声针引导系统的可靠性和准确性，该系统可将针尖位置和预测轨迹线叠加在实时超声图像上。我们对甲状腺结节进行了细针穿刺抽吸细胞学检查。这些操作中使用的针很细（21 - 27G），长度在40至80毫米之间。在240次标准化模型穿刺（角度：45°；目标深度：20毫米）中，使用了一个配备基于软件的针尖运动综合分析功能的专用训练工作站。未发生系统故障，所有病例均达到目标。软件分析显示，在针尖移动距离（-4.2%至+6.7%）、针倾斜度（-6.4%至+9.6%）和穿刺深度（-7.5%至+4.5%）方面，程序参数稳定，与预定义参考值的相对偏差较小。这些偏差似乎随着细针的使用而增加，在较小程度上也随着长针的使用而增加。它们归因于针在（模型）组织内的轻微弯曲。因此，我们使用的训练工作站适用于教育环境。然而，在复杂的临床穿刺场景中——例如，在关键解剖结构附近存在不利的局限性小病变的情况下，特别是那些涉及细针的情况——建议谨慎行事，不应完全依赖该系统。
