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Optimal Design of Bionic Flexible Fixation System for MRI-Guided Breast Biopsy
Journal of Bionic Engineering ( IF 4 ) Pub Date : 2019-12-06 , DOI: 10.1007/s42235-019-0123-3
Tianxue Zhang , Yun-hui Liu

In Magnetic Resonance Imaging (MRI) guided intervention procedures, the flexibility and reliability of the mammary gland fixation device are important indicators for ensuring the quality of surgery. This paper presents a bionic flexible fixation system for MRI-guided breast biopsy, and establishes a mathematical model of the palm-type curved plate and a breast compression model. The bending angle, eccentricity, and tightening stroke of the palm-type curved plate are considered the main influencing factors. The bending angle and eccentricity of the bionic palm-type curved plate and flexible fingers are optimized, and a prototype of the breast fixation system is developed. The experimental results show that when the external force is 10 N, the average repetitive accuracy of four lesion points is 0.71 mm, 0.60 mm, 0.63 mm, and 0.68 mm, respectively. When the pressures are 8 N, 10 N, and 12 N, the thickness of the compressed tissue is 76.27 mm, 72.8 mm and 68.73 mm, respectively. It has good repetitive accuracy and is compatible with the concept of flexible fixation that reduces the uncomfortable feeling of the human body. We propose that by optimizing the flexible tightening mechanism, it is feasible to properly control the external compression force to effectively reduce the compression pain for patients while guaranteeing the tightening reliability in breast biopsy.

中文翻译:

MRI引导下乳腺活检仿生柔性固定系统的优化设计

在磁共振成像(MRI)指导的干预程序中,乳腺固定装置的灵活性和可靠性是确保手术质量的重要指标。本文提出了一种用于MRI引导的乳腺活检的仿生柔性固定系统,并建立了掌状弯曲板的数学模型和乳房压迫模型。主要的影响因素是手掌型弯曲板的弯曲角度,偏心率和拧紧行程。优化了仿生手掌型弯曲板和柔性手指的弯曲角度和偏心度,并开发了乳房固定系统的原型。实验结果表明,当外力为10 N时,四个病变点的平均重复精度分别为0.71 mm,0.60 mm,0.63 mm和0.68 mm。当压力为8 N,10 N和12 N时,压缩组织的厚度分别为76.27 mm,72.8 mm和68.73 mm。它具有良好的重复精度,并且与可减少人体不适感的灵活固定概念兼容。我们建议通过优化灵活的收紧机制,在保证乳房活检的收紧可靠性的同时,适当控制外部压紧力以有效减轻患者的压痛是可行的。
更新日期:2019-12-06
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