Patent ID: 11925449
Assignee: BEIJING HUARUI BOSHI MEDICAL IMAGING TECHNOLOGY CO., LTD.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. An electrical impedance imaging method, comprising:
acquiring electrical impedance measurement signals of a tested human body area at a plurality of measurement times;
for the electrical impedance measurement signal at each measurement time, constructing a corresponding instantaneous differential image on a basis of the electrical impedance measurement signal;
constructing an image matrix on a basis of the instantaneous differential images at the plurality of measurement times, wherein each column in the image matrix is a vector corresponding to the respective instantaneous differential image, and wherein the image matrix is:

I=(α(t1),α(t2), . . . ,α(tN))

where I is the image matrix, a(t1) is a vector corresponding to the instantaneous differential image at a first measurement time, a(t2) is a vector corresponding to the instantaneous differential image at a second measurement time, and a(tN) is a vector corresponding to the instantaneous differential image at an N-th measurement time;
determining, on a basis of the image matrix, a covariance matrix corresponding to the image matrix;
obtaining, according to the covariance matrix, a weight vector of the covariance matrix; and
obtaining, on a basis of the covariance matrix and the weight vector, an electrical impedance state image of the tested human body area.