劉志文臺灣大學：電機工程學研究所馬特Lin, MattMattLin2007-11-262018-07-062007-11-262018-07-062007http://ntur.lib.ntu.edu.tw//handle/246246/53243In the recent past, the introduction of miniaturized image sensors with low power consumption, based on complementary metal oxide semiconductor (CMOS) technology, has allowed the invention of an ingestible wireless capsule for the visualization of the small intestine mucosa. These capsules received approval from US Food and Drug Administration (FDA) and gained momentum because they are more successful than traditional techniques of diagnosis of small intestine disorders. However, the present device still suffers from several limitations: they move passively by exploiting peristalsis, are not able to stop controllably for a prolonged diagnosis, they receive power from an internal battery with a short battery life, and their usage is restricted to one organ, either the small bowel or the esophagus. The steady progresses in many branches of engineering, including micro- electromechanical systems (MEMS), are envisaged to affect the performances of capsular endoscope. In 2004 an esophagus-specific capsule was launched, while a solution for colon is still under development. The near future foreshadows capsules that are able to pass actively through the whole gastrointestinal tract, retrieve views from all organs, and perform drug delivery and tissue sampling. In the near future, the advent of robotics could lead to autonomous medical platforms, equipped with the most advanced solutions in terms of MEMS for therapy and diagnosis of the digestive tract. In this thesis, our project team developed an advanced prototype of a capsule endoscope guided by an external magnetic control system (MCS) that is highly effective, low in cost, and safe.Chapter One: Introduction 1.1 Introduction of wireless capsule endoscope 1.2 Motivation and Objective 2 1.3 Thesis Structure 3 Chapter Two: Background Knowledge 5 2.1 Brief review of the traditional cannulated endoscope 5 2.2 Optical Components 7 2.3 Ultrasound Capsule 7 Chapter Three: Theory and current application 9 3.1 Capsule without external guidance system 9 3.2 Application of capsule with external guidance system 3.3 A new prototype of capsule endoscope 18 Chapter Four: Theory of Magnetic Control System (MCS) 24 4.1 Analysis and discussion of magnetic material 24 4.2 The mechanism of the Magnetic Control System (MCS) 27 4.3 Calculation and analysis of the magnetic field of the MCS Chapter Five: Simulated results and discussion 34 5.1 Simulation of contour diagrams to observe the magnetic field 35 5.2 Simulation of vector diagrams to verify the capsule rotation 37 5.3 Building 3-D vector diagrams to verify the MCS mechanism 41 5.4 Field calculation along tracks for practical values and database…..43 5.5 Field record and analysis along non-idea tracks 46 Chapter Six: Conclusion and Future Work 49 Reference 5110312730 bytesapplication/pdfen-US膠囊內視鏡磁力控制系統capsule endoscopemagnetic control systemthesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/53243/1/ntu-96-R94921128-1.pdf