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Doyeon Bang
Robotics Engineering Convergence, Chonnam National University, Gwangju 61186, Korea

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Journal article
Published: 12 July 2021 in Actuators
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As wireless capsule endoscope (WCE) technology has advanced, various studies were published on WCEs with functional modules for the diagnosis and treatment of problems in the digestive system. However, when additional functional modules are added the physical size of the WCEs will increase, making them more difficult for patients to comfortably swallow. Moreover, there are limitations when it comes to adding multi-functional modules to the WCEs due to the size of the digestive tract itself. This article introduces a controllable modular capsule endoscope driven by an electromagnetic actuation (EMA) system. The modular capsules are divided into a driving capsule and a functional capsule. Capsules with different functions are swallowed in sequence and then recombination, transportation and separation functions are carried out under the control of the EMA system while in the stomach, this approach solves the size limitation issues faced by multi-functional capsule endoscopes. The recombination and separation functions make use of a characteristic of soft magnetic materials so that their magnetization direction can be changed easily. These functions are made possible by the addition of a soft magnet to the capsule together with the precise control of magnetic fields provided by the EMA system.

ACS Style

Zhenyu Li; Manh Hoang; Chang-Sei Kim; Eunpyo Choi; Doyeon Bang; Jong-Oh Park; Byungjeon Kang. Modular Capsules with Assembly and Separation Mechanism: Proof of Concept. Actuators 2021, 10, 159 .

AMA Style

Zhenyu Li, Manh Hoang, Chang-Sei Kim, Eunpyo Choi, Doyeon Bang, Jong-Oh Park, Byungjeon Kang. Modular Capsules with Assembly and Separation Mechanism: Proof of Concept. Actuators. 2021; 10 (7):159.

Chicago/Turabian Style

Zhenyu Li; Manh Hoang; Chang-Sei Kim; Eunpyo Choi; Doyeon Bang; Jong-Oh Park; Byungjeon Kang. 2021. "Modular Capsules with Assembly and Separation Mechanism: Proof of Concept." Actuators 10, no. 7: 159.

Journal article
Published: 13 April 2021 in Micromachines
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Microscale and nanoscale robots, frequently referred to as future cargo systems for targeted drug delivery, can effectively convert magnetic energy into locomotion. However, navigating and imaging them within a complex colloidal vascular system at a clinical scale is exigent. Hence, a more precise and enhanced hybrid control navigation and imaging system is necessary. Magnetic particle imaging (MPI) has been successfully applied to visualize the ensemble of superparamagnetic nanoparticles (MNPs) with high temporal sensitivity. MPI uses the concept of field-free point (FFP) mechanism in the principal magnetic field. The gradient magnetic field (|∇B|) of MPI scanners can generate sufficient magnetic force in MNPs; hence, it has been recently used to navigate nanosized particles and micron-sized swimmers. In this article, we present a simulation analysis of the optimized navigation of an ensemble of microsized polymer MNP-based drug carriers in blood vessels. Initially, an ideal two-dimensional FFP case is employed for the basic optimization of the FFP position to achieve efficient navigation. Thereafter, a nine-coil electromagnetic actuation simulation system is developed to generate and manipulate the FFP position and |∇B|. Under certain vessel and fluid conditions, the particle trajectories of different ferromagnetic polymer ratios and |∇B| were compared to optimize the FFP position.

ACS Style

Saqib Sharif; Kim Nguyen; Doyeon Bang; Jong-Oh Park; Eunpyo Choi. Optimization of Field-Free Point Position, Gradient Field and Ferromagnetic Polymer Ratio for Enhanced Navigation of Magnetically Controlled Polymer-Based Microrobots in Blood Vessel. Micromachines 2021, 12, 424 .

AMA Style

Saqib Sharif, Kim Nguyen, Doyeon Bang, Jong-Oh Park, Eunpyo Choi. Optimization of Field-Free Point Position, Gradient Field and Ferromagnetic Polymer Ratio for Enhanced Navigation of Magnetically Controlled Polymer-Based Microrobots in Blood Vessel. Micromachines. 2021; 12 (4):424.

Chicago/Turabian Style

Saqib Sharif; Kim Nguyen; Doyeon Bang; Jong-Oh Park; Eunpyo Choi. 2021. "Optimization of Field-Free Point Position, Gradient Field and Ferromagnetic Polymer Ratio for Enhanced Navigation of Magnetically Controlled Polymer-Based Microrobots in Blood Vessel." Micromachines 12, no. 4: 424.