Capsule Endoscope Traction Member Positioning
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Solution Overview
Problem
The string-like member in existing capsule endoscopes can degrade the quality of intra-subject images by appearing in the field of view of the imaging unit, causing image distortion and flare, which hampers diagnosis and observation.
Innovation Solution
A body-insertable apparatus with a traction member that extends from the principal point of the optical system toward the attachment member, positioned to minimize the appearance of the traction member in the captured image, thereby reducing image degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a string-like member is attached to the outer casing member for traction, then the capsule endoscope can be controlled to move at adjusted speeds and positions, but the string-like member appears in the field of view of the imaging unit and degrades image quality
Solution Approach 1:
The patent positions the string-like member in a specific spatial arrangement relative to the optical axis, extending it from the outer casing member in a direction that avoids intersection with the field of view. This dimensional positioning separates the traction function from the imaging function, allowing the string-like member to serve its control purpose without interfering with image capture.
Solution Approach 2:
The patent applies different spatial characteristics to different parts of the capsule endoscope: the imaging unit has a specific field of view optimized for capturing internal organ images, while the string-like member is positioned in a different spatial zone that does not overlap with the imaging area. This local differentiation ensures that each component performs its function without interfering with the other.
2Object-affected harmful factors
If the string-like member is positioned to avoid the field of view, then image quality is maintained, but the control functionality may be compromised
Solution Approach 1:
The patent resolves this contradiction by utilizing three-dimensional spatial arrangement. The string-like member is extended from the outer casing member in a direction that is spatially separated from the optical axis and field of view of the imaging unit. This allows the string-like member to remain accessible for manual manipulation while maintaining its functional separation from the imaging system, thus preserving both image quality and control functionality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively suppresses the degradation of image quality by minimizing the appearance of the traction member in the image, allowing for high-quality intra-subject imaging without restricting the field of view.
Implementation Method 1
an optical system which focuses light introduced from outside onto a predetermined surface
Implementation Method 2
an outer casing member which houses the optical system and includes a window portion to introduce light from the outside into the optical system
Data Source
AI summary
To provide a capsule endoscope in which a degree of appearance of a sting-like member in a captured image is reduced, a capsule endoscope (2) includes an optical system (18) having a predetermined principal point, an imaging unit (19) which captures light focused by the optical system (18), and an attachment member (28) which is arranged at a predetermined position on a window portion (17a) having optical transparency and forming a portion of an outer casing member (17) housing the optical system (18) and the imaging unit (19). The capsule endoscope (2) further includes a traction member (29) having one end secured to the attachment member (28) and extending by a predetermined distance in a direction from the optical system (18) toward a position of the attachment member (28). Since the traction member (29) has such a structure, an appearance of an image of the traction member (29) can be reduced at the imaging unit (19).