Capsule Medical Device Guidance System Force Balancing
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Solution Overview
Problem
Existing capsule medical device guidance systems face challenges in precisely controlling the position and posture of capsule medical devices within a subject, such as capsule endoscopes, due to imbalances in magnetic forces during operation, leading to reduced responsiveness and accuracy.
Innovation Solution
A capsule medical device guidance system that includes a capsule medical device with a permanent magnet, a magnetic field generator outside the subject, an operation input device, and a processor. The processor controls the magnetic field generator based on operation inputs to balance forces acting on the capsule medical device, allowing for precise control of its position and posture by adjusting the magnetic field, and uses control information to maintain a stable state before and after operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If magnetic field generator is controlled to change magnetic field for guiding capsule medical device, then position and posture control is achieved, but force imbalance occurs during operation leading to reduced responsiveness and accuracy
Solution Approach 1:
The system performs preliminary action by obtaining control information in advance (before or when starting operation) to establish a baseline state where forces are balanced. This preliminary control information is then used to maintain stability during subsequent operations, preventing force imbalance and ensuring accurate positioning without requiring continuous real-time adjustment.
Solution Approach 2:
The system implements feedback by continuously monitoring the actual state of the capsule medical device and comparing it with the intended control state. Based on this comparison, the processor adjusts the magnetic field generator control to correct any deviations, ensuring the device returns to the desired position and posture even when force imbalance occurs during operation.
2Measurement precision
If magnetic field is continuously adjusted during operation, then position control accuracy is improved, but system complexity and control difficulty increase
Solution Approach 1:
The system reduces control complexity by performing the complex calculation and adjustment in advance. The processor obtains control information before or when starting operation, establishing the magnetic field generator parameters in advance. During operation, the system simply needs to maintain these pre-established parameters rather than continuously adjusting them, significantly simplifying the real-time control requirements.
Solution Approach 2:
The system applies dynamics by making the control approach adaptive: using preliminary control information when the device is stationary or in stable states, and switching to feedback-based real-time control only when position adjustments are needed. This dynamic control strategy maintains positioning accuracy while minimizing unnecessary complex calculations during stable operation phases.
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
This solution enables stable and responsive control of the capsule medical device, improving its positioning and posture accuracy, and reducing the gap between intended and actual control states, thus enhancing the system's operational efficiency and user experience.
Implementation Method 1
a magnetic field generator provided outside the subject and configured to generate a magnetic field to be applied to the capsule medical device
Implementation Method 2
control the magnetic field generator, based on the operation information input from the operation input device, to change the magnetic field to change at least one of the position and the posture of the capsule medical device
Data Source
AI summary
A capsule medical device guidance system includes: a capsule medical device including a permanent magnet and configured to be introduced into a subject; a magnetic field generator configured to generate a magnetic field to be applied to the capsule medical device; an operation input device configured to input operation information; and a processor including hardware. The processor is configured to: control the magnetic field generator, based on the operation information input from the operation input device, to change the magnetic field to change at least one of the position and the posture of the capsule medical device; obtain control information for the magnetic field generator in a state where forces acting on the capsule medical device are balanced before starting or when starting operation on the operation input device; and control the magnetic field generator by using the control information after the operation is finished.