Three-dimensional ventilation image generation method, and controller and apparatus

A three-dimensional ventilation image generation method, comprising:

• reconstructing a three-dimensional image by an image reconstruction algorithm and according to an electrical impedance signal obtained by performing electrical impedance measurement on a target region to be measured, wherein the performing electrical impedance measurement on a target region to be measured is implemented by using an electrode array that is three-dimensionally distributed on the periphery of said target region to be measured,
• wherein the electrical impedance signal comprises a ventilation-related signal and a blood-perfusion-related signal;
• listing a time sequence of each pixel in the three-dimensional image according to three- dimensional image data at a plurality of moments, wherein the time sequence of each pixel is comprised of values of each pixel at different moments;
• extracting a time sequence of a ventilation-related pixel from among the time sequences of each pixel in the three-dimensional image by filtering to separate the ventilation-related signal from the blood-perfusion-related signal;
• and
• constructing a three-dimensional ventilation image according to the time sequence of the ventilation-related pixel, wherein the three-dimensional ventilation image is constructed as:
• AV={ƒ(a1), ƒ(a2), . . . , ƒ(aM)}T
• where ai(i=1,2 . . . ,M) denotes a column vector composed of the values of pixel i at the plurality of moments, M denotes a total number of the pixels in the three-dimensional image, Av refers to the ventilation image, and f(⋅) refers to a filter function.