Method and apparatus controlling drive signal

Abstract

The invention provides a method and apparatus controlling a drive signal. The method comprises steps of determining a spreading distance required by the drive signal for detection of a to-be-detected target, determining drive frequency required by the drive signal for spreading the spreading distance, and outputting the drive signal of the drive frequency. The invention provides the method and apparatus for controlling the drive signal, and detection result accuracy can be improved.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a method and device for controlling an excitation signal. Background technique [0002] The human body is a large bioelectrical conductor, and each tissue and organ has a certain impedance. When a local organ of the human body becomes diseased, the impedance of the local part must be different from that of other parts. Make a diagnosis. EIT (Electrical Impedance Tomography, Electrical Impedance Imaging) is a technique for detecting lesions by measuring changes in the impedance of the human body. [0003] In the existing EIT, the current is generally injected into the human body as an excitation signal, and the voltage caused on the body surface is detected. Using the detected voltage value, according to a certain reconstruction algorithm, it is calculated that the internal tissues and organs of the human body are affected by the electric field. Impedance distribution is...

AI Technical Summary

Problems solved by technology

[0004] In the existing EIT, the frequency of the injected excitation signal is generally fixed. When the target to be detected is far away from the electrode used to inject the excitation signal, the excitation signal cannot reach the target to be detected, making the target to be detected difficult to be detected. making the test results inaccurate

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