Wireless Capsule Endoscope Adaptive Frame Rate Control
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Solution Overview
Problem
Capsule endoscopes capture numerous repeated images during digestive tract examinations, wasting power and increasing physician workload, as they lack efficient methods to adapt frame rates based on movement, leading to potential missed lesions and reduced operating efficiency.
Innovation Solution
A wireless capsule endoscope system with adaptive frame rate determination using 6-axis sensors to assess relative movement between the capsule and a portable recorder, adjusting the frame rate in real-time to minimize redundant images and improve accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the capsule endoscope captures images at a high frame rate continuously, then the image quality and completeness are improved, but the power consumption increases and the battery life is reduced
Solution Approach 1:
The patent applies dynamics by making the frame rate adjustable rather than fixed. The system dynamically changes the frame rate based on the capsule's movement state detected by the 6-axis sensor. When movement is detected, the frame rate increases to capture important visual information; when stationary, the frame rate decreases to conserve power. This resolves the contradiction between maintaining image completeness and reducing power consumption.
Solution Approach 2:
The patent changes the frame rate parameter based on movement conditions. The controller adjusts the frame rate parameter from a first frame rate (higher) when movement is detected to a second frame rate (lower) when stationary, or vice versa. This parameter adaptation allows the system to optimize between image capture quality and power consumption according to actual operating conditions.
2Reliability
If the capsule endoscope captures images at a high frame rate, then the probability of capturing lesions is improved, but the number of repeated images increases and physician workload increases
Solution Approach 1:
The system dynamically adjusts frame rate based on real-time movement detection. When the capsule is stationary, the frame rate is reduced, minimizing repeated images. When movement occurs (indicating potential lesion areas or important anatomical transitions), the frame rate increases to ensure adequate sampling. This dynamic adjustment reduces redundant images for physician review while maintaining lesion detection capability.
Solution Approach 2:
The system uses feedback from the 6-axis sensor to continuously monitor capsule movement and adjusts the frame rate accordingly. The controller receives movement information and modifies the imaging parameters in real-time. This closed-loop feedback mechanism ensures that high frame rates are applied only when necessary for lesion detection, reducing unnecessary image capture and subsequent physician workload.
3Duration of action of moving object
If the capsule endoscope captures images at a low frame rate to save power, then the battery life is extended, but the probability of missing lesions increases
Solution Approach 1:
The system employs dynamic frame rate adjustment rather than a fixed low frame rate. The frame rate adapts to the capsule's movement state: lower when stationary to extend battery life, higher when movement is detected to ensure lesion capture. This dynamic approach prevents missed lesions while optimizing battery utilization throughout the examination duration.
Solution Approach 2:
The system takes preliminary action by detecting movement before potential lesion capture opportunities are lost. The 6-axis sensor continuously monitors for movement that may indicate approaching lesions or important anatomical features. When movement is detected, the frame rate is increased in advance to ensure adequate image capture, preventing missed diagnoses while minimizing overall power consumption during stationary periods.
Data Source
AI summary
The present invention discloses a system for wireless capsule endoscope with adaptive frame rate, comprising: a recorder data processor to filter the first posture information of a capsule endoscope and the second posture information of a portable recorder to obtain a quaternion p0 of the first posture information and a quaternion p1 of the second posture information, and to calculate an interpolated median s0 between p0 and p1 at time t0, and an interpolated median s1 between p′0 and p′1 at time t1; the recorder data processor also calculates a difference diff0 between the interpolated median s0 and s1, and works out the dot product of the difference diff0 and unit quaternion [1, 0, 0, 0].