Endoscope Insertion Tracking With Frequency-Corrected Magnetic Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing endoscope systems fail to accurately detect the position and shape of the insertion part due to inaccuracies in deriving the intensity of the magnetic field, as they do not consider the frequency characteristic of the circuit network.
Innovation Solution
An endoscope system that includes an acquisition unit to acquire the frequency characteristic of the circuit network, a correction unit to generate a normalization waveform based on this characteristic, and a derivation unit to normalize the detection signal, allowing for precise detection of the insertion state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the output signal of the circuit network is normalized without considering frequency characteristic, then the processing is simple, but the intensity of the magnetic field cannot be derived with high accuracy
Solution Approach 1:
The patent applies preliminary action by pre-acquiring the frequency characteristic of the circuit network before performing normalization. The acquisition unit obtains the frequency characteristic in advance, and the correction unit uses this pre-acquired information to generate a corrected differential waveform. This allows the system to account for frequency effects without adding complexity during the actual normalization process, as the frequency compensation is prepared beforehand.
2Measurement precision
If the frequency characteristic of the circuit network is considered in normalization, then the accuracy of insertion state detection is improved, but the processing complexity increases
Solution Approach 1:
The patent introduces an intermediary approach by using a correction unit that acts as a mediator between the raw differential waveform and the final normalization process. The correction unit generates a corrected differential waveform by applying frequency characteristic information, serving as an intermediate step that bridges the simple differentiation process and the accurate normalization requirement. This intermediary correction step enables accurate insertion state detection while managing processing complexity through a dedicated correction module.
3Measurement precision
If simple normalization is used without frequency correction, then the processing is fast, but the insertion state including position and shape cannot be detected with high accuracy
Solution Approach 1:
The patent applies preliminary action by pre-acquiring the frequency characteristic of the circuit network before performing normalization. The acquisition unit obtains the frequency characteristic in advance, and the correction unit uses this pre-acquired information to generate a corrected differential waveform. This allows the system to account for frequency effects without adding complexity during the actual normalization process, as the frequency compensation is prepared beforehand.
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
Enables accurate detection of the insertion state, including position and shape, of the endoscope insertion part by correcting for frequency characteristics in the magnetic field detection process.
Implementation Method 1
a magnetic field detection element detecting a magnetic field generated by a magnetic field generation element
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An endoscope system acquires a frequency characteristic of a circuit network, which is connected to a magnetic field detection element detecting a magnetic field and which outputs a detection signal corresponding to the magnetic field detected by the magnetic field detection element, generates a normalization waveform by correcting a differential waveform, which is obtained by differentiating a drive waveform of a magnetic field generation element generating the magnetic field, depending on the frequency characteristic, derives intensity of the magnetic field by normalizing the detection signal output from the circuit network with the normalization waveform, and detects an insertion state including at least one of a position or a shape of an insertion part of an endoscope inserted into a subject by using the intensity of the magnetic field.