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Capsule endoscopes (CEs) have been highlighted as a next generation diagnostic device for the digestive organs (i.e. the stomach, small bowel and colon). Although CE imaging functions and control techniques have been continuously studied, CEs cannot completely replace conventional wire-based endoscopes because current commercial CEs only have diagnosis functions. To extend the range of applications...
With advent of the capsule endoscope, tattooing to mark the position of the intestinal polyps becomes critical technique for successful removal of polyps. Therefore, we develop a micro tattooing mechanism activated by multiple conical springs which can be installed in a capsule endoscope. In order to insert the needle and inject ink, a conical spring is released by cutting a post with Ni-Cr wire....
In this paper, a new type of screw propeller for capsule endoscopes is introduced whose rotation motion is enforced by magnetic forces between an armature magnet inside the capsule and an external rotating permanent magnet working like an AC stator. The screw propeller consists of flexible threads attached on the capsule body. The spiral angle of the flexible threads switches automatically due to...
Various actuators have been studied to develop micro robots for a capsule endoscope. In particular, some locomotive mechanisms based on the SMA (shape memory alloy) actuator, the PZT actuator, the Polymer actuator, and the micro motor have been actively studied to fabricate a microrobot for a capsule endoscope. Before we fabricate microrobots, smart material-based actuators such as SMA, PZT, Polymer,...
Diagnosis using a flexible endoscope in gastro-intestinal tract becomes very important. In addition, the endoscope is a basic tool of diagnosis and treatment for digestive organ. However, the operation of endoscope is very labor intensive work and gives patients some pains. Therefore, the video capsule endoscope is developed for the diagnosis of digestive organs. For its conveniences for diagnosis,...
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