METHOD FOR DUAL-ENERGY TOMOGRAPHY IN A CONICAL BEAM AND A DUAL-ENERGY DETECTOR DEVICE ARRANGEMENT Russian patent published in 2019 - IPC A61B6/03 G21K1/00 G01T1/161 

FIELD: medicine.

SUBSTANCE: group of inventions relates to medical equipment, specifically to dual energy tomography. Method of dual-energy tomography in a conical beam involves formation by means of an X-ray device of a directed x-ray radiation stream through a patient's body, separation of transmitted through the patient's body area radiation into low-energy and high-energy components of the X-ray spectrum by means of a filter, recording the transmitted radiation on the flat panel x-ray detector, processing data from the detector after completion of exposure and obtaining a tomogram, wherein the filter is fixed on the end of the flat panel x-ray detector, absorbs low-energy component of X-ray spectrum and covers half of pixels of detector in staggered order or by means of parallel lamels, half of pixels of detector detects radiation, does not interact with filter, and forms a first group of pixels, and the other half of pixels of detector detect radiation passing through filter, and forms a second group of pixels, wherein radiation detection condition is provided, when the combination of four adjacent pixels consists of two pixels of the first group, detecting radiation, not interacting with the filter and representing the full X-ray radiation spectrum, and two pixels of the second group, which detect radiation passing through the filter and representing a high-energy component of the X-ray radiation spectrum, when processing data in each of the pixel groups, adding signals, method includes subtracting signal of second group of pixels from first and obtaining information on low-energy component of X-ray spectrum obtained for four pixels of first and second groups, which is related to average coordinate of said pixels when receiving tomogram. Device comprises an X-ray apparatus, a filter configured to divide the radiation transmitted through the patient's body region into the low-energy and high-energy components of the X-ray spectrum, and a flat panel x-ray detector, wherein the filter is fixed on the end face of the flat panel x-ray detector.

EFFECT: use of inventions makes it possible to eliminate the need to synchronize operation of the filter with the feeding X-ray device, while simplifying the design of the filter.

2 cl, 2 dwg