Abstract
In this study, a radial imaging capsule endoscope (RICE) system is designed, which differs from a conventional front imaging capsule endoscope (FICE) system. To observe the wrinkled intima of the intestine, which spreads without folding around the circumference of the capsule when a capsule endoscope with a diameter that slightly exceeds that of the intestine passes through it, the RICE uses a cone mirror, a radial window shell, and a focus optical module that comprise the radial imaging system. This concept was demonstrated in a packaged optical simulator. The RICE optical model also has been established and verified by many simulations and experiments. In minimizing the sagittal and tangential aberrations, the optical module of the RICE has achieved an F-number of 4.2, a viewing angle of 65.08°, and an RMS radius of the 4th to 6th fields of less than 17 um. A comparison of these characteristics with those of the focus optical module that is used in FICE lenses reveals that the spot size is 50% larger for each field, and the modulation transfer function (MTF) is remarkably improved from 7% to 36% at 100 lp/mm on the 5th field of the sagittal plane.
Highlights
As people work more and eat more colorful foods, their diet habits have become poorer, and the load on the typical digestive system has increased
This study presents a new kind of capsule endoscope that utilizes a cone mirror, a radial window shell, and a focus optical module as an omni-directional vision system to solve the problems of the front imaging capsule endoscope (FICE) system [5]
This study presents a cone mirror and focusing lenses to realize the radial imaging capsule endoscope (RICE) system, which can successfully capture radial images
Summary
As people work more and eat more colorful foods, their diet habits have become poorer, and the load on the typical digestive system has increased. Digestive diseases are typically observed using a colonoscope or a gastroscope. These invasive instruments usually make patients uncomfortable. Of particular note is the use of a magnetic field to control the direction of motion of the capsule in the intestine. This technology is very useful in the field of capsule endoscopes [4]. Pathological cells in the early stage are typically covered by the crepe intima and must be studied in advance of the problem.
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