Position detection system, guidance system, position detection method, medical device, and medical magnetic-induction and position-detection system

Abstract

There are provided a position detection system, a guidance system, and a position detection method which obviate the need for frequency adjustment of an alternating magnetic field used in position detection of a device and which allow the device to be made more compact and less expensive. There are included a device (capsule endoscope 20 ) provided with a magnetic induction coil, a drive coil 51 for generating an alternating magnetic field, a plurality of magnetic sensors 52 for detecting an induced magnetic field, a frequency determining section 50 B for determining a position calculating frequency based on a resonance frequency of the magnetic induction coil, and a position analyzing unit 50 A for calculating, at the position calculating frequency, at least one of the position and the orientation of the device 20 based on the difference between outputs from the magnetic sensors 52 when only the alternating magnetic field is applied and outputs from the magnetic sensors 52 when the alternating magnetic field and the induced magnetic field are applied; and at least one of a frequency range of the alternating magnetic field and an output frequency range of the magnetic field sensors is limited based on the position calculating frequency.

Description

technical field [0001] The invention relates to a position detection system, a guidance system, a position detection method, a medical device, and a medical magnetic induction and position detection system. Background technique [0002] Recently, swallowable capsule medical devices represented by capsule endoscopes etc., which are swallowed by the patient to enter the patient's body, where they pass through the passage in the body cavity to catch the passage in the body cavity Image of the target location inside. The above-mentioned capsule endoscope has a configuration in which an image forming device (such as a CCD (Charge Coupled Device) that can acquire an image, etc.) that can perform the above-mentioned medical procedure is provided therein, and is performed at a target position inside a channel in a body cavity. Image acquisition. [0003] However, the capsule medical device described above simply moves along the alimentary canal with peristalsis, and the position a...

AI Technical Summary

Problems solved by technology

[0010] However, if the capacitance of the capacitor is selected according to the individual LC resonance circuit, the number of manufacturing steps of the LC resonance circuit increases, resulting in a problem that the manufacturing cost of the capsule medical device increases

[0011] In addition, it is difficult to reduce the size of the capsule because the power supply must be used inside the capsule, and because the power supply capacity must be increased

In addition, there is a problem that the working time of the capsule is reduced

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