METHOD FOR VISUALIZING PERFUSION FIELD OF THORACIC CAVITY TISSUES BASED ON ELECTRICAL IMPEDANCE TOMOGRAPHY Russian patent published in 2021 - IPC A61B6/00 

FIELD: medicine.

SUBSTANCE: invention relates to medicine, namely to medical equipment, and can be used to monitor the field of perfusion of the tissues of the chest cavity. Continuous measurements of the voltages between the electrodes on the surface of the chest are made during the serial connection of the current source to the pairs of electrodes on the surface of the chest. Reconstruction of the field of changes in the conductivity of the chest cavity, filtration and visualization of the component of the field of changes in the conductivity of the chest cavity caused by perfusion of the tissues of the chest cavity is carried out. In this case, before the reconstruction of the field of changes in the conductivity of the chest cavity, the measured voltages between the electrodes on the surface of the chest are filtered. Moreover, the value of the lower cutoff frequency of the notch filter suppression band takes as little as possible the respiratory rate, and the value of the upper cutoff frequency of the suppression band of the notch filter is selected in accordance with the condition: , where F_u is the upper cutoff frequency of the band of suppression of the notch filter, F_hr is the heart rate, F_frm is the frequency of respiratory movements. Visualization of the component of the field of changes in the conductivity of the chest cavity caused by perfusion of the tissues of the chest cavity is carried out after reconstruction of the field of changes in the conductivity of the chest cavity.

EFFECT: invention provides increased reliability of visualization of the field of perfusion of the tissues of the chest cavity based on electrical impedance tomography in conditions of high noise of the measured voltages between the electrodes on the surface of the chest due to the declared frequencies of the suppression band of the notch filter.

1 cl, 2 dwg