Performance evaluation of magnetically driven cytology brush applicable to capsule endoscopy
Performance evaluation of magnetically driven cytology brush applicable to capsule endoscopy
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DOI：
10.3233/jae-150101
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发表时间：
2016
影响因子：
0.6
通讯作者：
K. Hajima;M. Yamashita;T. Honda
中科院分区：
文献类型：
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作者：
K. Hajima;M. Yamashita;T. Honda
本文介绍了一种适用于胶囊内窥镜刷细胞学的新型磁致动器。它的节省空间的机构由一个刷头弹性钢丝和一个可旋转的永磁体组成，可以很容易地组装在一个可吞咽的胶囊中。当外加磁场时，刷体随着磁铁的旋转向外伸出，然后收集胃肠道细胞。所提出的致动器的显著特征是它可以执行四种不同的致动，包括刷子的投射/回拉/刮擦模式和胶囊体的旋转模式。每种驱动方式可根据外加磁场的方向来选择。本研究验证了每种模式都能表现出期望的性能，并确定了其驾驶条件。此外，一个附加的小磁铁附着在刷头已经发现，以提高刮模式的性能。在这项研究中获得的结果表明，所提出的驱动器应该是一个有希望的候选人细胞学诊断胶囊内窥镜。
This article provides a novel magnetic actuator suitable for brush cytology using capsule endoscopy. Its space-saving mechanism consisting of a brush-tipped elastic wire coupled with a rotatable permanent magnet can be easily assembled in a swallowable capsule. When external magnetic fields are applied, the brush projects outwards with rotation of the magnet, and then collects cells from gastrointestinal tract. The distinctive feature of the proposed actuator is that it can perform four different actuations including projection/pullback/scrape modes for the brush and a rotation mode for the capsule body. Each actuation mode can be selected by the direction of the external magnetic fields. This study has verified that each mode can exhibit the desired performance and determined its driving conditions. Furthermore, an additional small magnet attached to the brush tip has been found to enhance the performance of the scrape mode. The results obtained in this study suggested that the proposed actuator should be a hopeful candidate for cytological diagnosis with capsule endoscopy.