METHOD OF MICROWAVE ULTRA HIGH-RESOLUTION TOMOGRAPHY Russian patent published in 2018 - IPC A61B5/05 G06K9/00 

FIELD: medicine.

SUBSTANCE: invention relates to a medical technique, namely to methods for scanning and further processing the resultant image for tomographic examination. Method of microwave ultra high-resolution tomography of a tissue without disturbing its integrity comprises the steps of placing a microwave power source and microwave receiving and transmitting antennas, controlling microwave receiving and transmitting antennas, placing a matching medium between the microwave transmitting and receiving antennas, placing a tissue to be irradiated, receiving inside the separating medium the microwave radiation by the transmitting and receiving antennas after interaction with the tissue and measuring the change in microwave radiation after interaction with the tissue, processing the measurement results and constructing a three-dimensional tomographic image of the tissue, wherein the transmitting and receiving antennas are controlled so that each of them emits microwave radiation, axis of the radiation pattern of which discretely changes its angular position in the radiation plane, that is, with the help of each transmitting and receiving antenna, several measurements are made corresponding to each angular position of the axis of the radiation pattern, wherein the step to which the direction of the axis of the radiation pattern of the scanning radiation changes, corresponds to the magnitude of the required resolving power, a set of tomograms is constructed, each of tomograms corresponds to a certain radiation pattern, further they are summed up and the obtained result is processed using an inverse filter, the final tomographic image of the tissue is constructed in accordance with formula: , where T(x,y,z) – is a superposition of individual images; K(x,y,z) – analytic approximation of a two-dimensional spatial filter; x,y,z – spatial variables; u – Fourier variable conjugate to x; v – Fourier variable conjugate to y; – two-dimensional Fourier images of corresponding functions T and K with respect to variables x and y; α – regularization parameter; Ω=u²+v² – regularizing operator; * is a complex conjugate sign.

EFFECT: use of the invention provides the improved quality of images obtained with the help of microwave tomography by increasing their spatial resolution up to 1 mm or more.

1 cl, 5 dwg