The invention discloses a
lung function evaluation method and
system combining
ultrasound and
electrical impedance tomography, and relates to the technical field of
medical imaging, and the method comprises the steps: decomposing multi-frequency
electrical impedance tomography data to obtain ventilation and
perfusion impedance signals, and reconstructing the ventilation and
perfusion impedance signals into a functional diagram; fusing the functional diagram with the ultrasonic image to generate a structure-function fused image; and calculating a ventilation-
perfusion ratio, setting a threshold value according to data of healthy people, and performing classification evaluation. According to the method, the anatomical structure segmentation of the ultrasonic dynamic image is combined with the
time sequence feature reconstruction of the
electrical impedance tomography functional
signal, so that the spatial continuity and the corresponding accuracy of the structural information and the functional information are improved; multi-frequency impedance signals are decomposed, and weighted fusion is realized under an anatomical reference
system, so that the expression ability of the
system on ventilation and perfusion differences in different areas and the recognition precision of functional abnormalities are enhanced; and high-precision ventilation / perfusion evaluation and classification of
lung structure-function integration are realized.