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Development of a Low Resource Capsule type Ultrasound Endoscopic Probe with Coded Excitation

Title
Development of a Low Resource Capsule type Ultrasound Endoscopic Probe with Coded Excitation
Translated Title
저자원의 캡슐형 초음파 내시경의 개발과 Coded Excitation
Authors
Jeehoon Son
DGIST Authors
Jeehoon Son; Jae Youn HwangJin Ho Chang
Advisor(s)
황재윤
Co-Advisor(s)
Jin Ho Chang
Issue Date
2021
Available Date
2022-07-07
Degree Date
2021/02
Type
Thesis
Keywords
Esophageal cancer, capsule endoscope, ultrasound imaging, coded excitation, 식도암, 캡슐형 내시경, 초음파 영상, Coded Excitation
Abstract
In the treatment of esophageal cancer, a quantitative diagnosis of the cancer stage is essential in providing suitable treatment for patients. However, optical endoscopes which image only the surface of the tumor or computed tomography (CT) scans which damage the body are not suitable diagnostic tools. Alt-hough ultrasound endoscopy is suitable for imaging the cancer’s growth depth into the esophagus, the con-ventional system requires an experienced clinician to insert a large tube into an organ and is highly likely to damage the patient’s esophagus. Recently, to overcome this limitation, various research groups have been studying the capsule type ultrasound endoscopy system, but these are too large for humans to swallow or inappropriate for diagnosis due to low image resolution. To overcome the shortcomings of the capsule type ultrasound endoscope, we developed a small capsule endoscope structure using a reflector and evaluated a signal improvement technique suitable for low voltage. This system minimizes the inter-nal rotation structure through the micro-stepping control of a small step motor, and the performance is compared using coded excitation techniques to optimally obtain a signal at a low voltage. This system has the smallest length compared to existing capsule endoscope modules, and it is possible to secure multiple ultrasound image scan lines through a step motor. Also, through the coded excitation technique, the relative performance of the spatial resolution and signal-to-noise ratio (SNR) of the image according to each tech-nique could be compared in a low-voltage environment. This system showed improvement of low-voltage image performance through miniaturization and signal improvement techniques suitable for insertion into the body of the capsule type ultrasound endoscope system, suggesting that the image improvement through the low-voltage technique can be miniaturized using an appropriate structure. By presenting the advantages and disadvantages of the ultrasound signal improvement technique, suggest the information to enhance imaging depth for developing capsule type ultrasound endoscope.
URI
http://dgist.dcollection.net/common/orgView/200000362668
http://hdl.handle.net/20.500.11750/16662
DOI
10.22677/thesis.200000362668
Degree
Master
Department
Information and Communication Engineering
University
DGIST
Related Researcher
  • Author Hwang, Jae Youn MBIS(Multimodal Biomedical Imaging and System) Laboratory
  • Research Interests Multimodal Imaging; High-Frequency Ultrasound Microbeam; Ultrasound Imaging and Analysis; 스마트 헬스케어; Biomedical optical system
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Collection:
Department of Electrical Engineering and Computer ScienceThesesMaster


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