Background

To assess the feasibility of a novel system that uses augmented reality to guide interventional oncology procedures.

Methods

This study was conducted in accordance to the guidelines of the local institutional review boards. Evaluation of an augmented reality system based upon a tablet, a needle handle and a set of markers was performed in three experimental models. Initially, a male anthropomorphic trunk phantom equipped with five polyvinyl chloride bars (two of 16 cm in length and 3 cm in diameter and four of 45, 30 or 20 cm in length and 2 cm in diameter) was used to study the accuracy of the system without respiratory motion or tissue compression. Next, small metallic targets were placed in a porcine model to evaluate how respiration affects the system accuracy. Finally, the performance of the system on a more complete model, a cadaver with liver metastasis, was tested.

Results

In all experimental settings, extremely high targeting accuracy of < 5 mm in all cases was achieved: 2.0 ± 1.5 mm (mean ± standard deviation) for the anthropomorphic model, 3.9 ± 0.4 mm for the porcine model, and 2.5 mm and 2.8 mm for the two metastases in the cadaver model.

Conclusions

Augmented reality can assist with needle guidance with great target accuracy for interventional procedures by simultaneously visualising three-dimensional reconstructed anatomical structures, tumour targets and interventional devices on a patient’s body, enabling performance of procedures in a simple and confident way.

中文翻译：

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介入肿瘤学的增强现实：新型高端引导系统平台的概念验证研究。

背景

评估使用增强现实指导介入肿瘤学程序的新系统的可行性。

方法

这项研究是根据当地机构审查委员会的指导方针进行的。在三个实验模型中对基于平板电脑、针柄和一组标记的增强现实系统进行了评估。最初，一个男性拟人躯干体模配备了五个聚氯乙烯棒（两个长 16 厘米，直径 3 厘米，四个长 45、30 或 20 厘米，直径 2 厘米）用于研究系统没有呼吸运动或组织压缩。接下来，将小型金属目标放置在猪模型中，以评估呼吸如何影响系统精度。最后，测试了系统在更完整的模型上的性能，即肝脏转移的尸体。

结果

在所尸体模型中的两个转移灶。

结论

增强现实可以通过同时可视化患者身体上的 3D 重建解剖结构、肿瘤靶点和介入设备，以极高的目标精度为介入手术提供针引导，从而以简单而自信的方式执行手术。