METHOD FOR VERIFICATION OF PATIENT'S LAYING IN REMOTE BEAM THERAPY AND DUAL-ENERGY DETECTOR DEVICE CIRCUIT Russian patent published in 2019 - IPC A61B6/03 G21K1/00 G01T1/161 

FIELD: medicine.

SUBSTANCE: group of inventions relates to radiation monitoring methods, namely to an X-ray method, and can be used in verification of the patient's position relative to the isocenter of the remote beam therapy apparatus. Method for verification of patient's laying in remote beam therapy consists in placing patient so that patient's controlled area of patient is located in initial position relative to X-ray radiation flux of remote radiation therapy apparatus, dividing radiation transmitted through patient's body area into low-energy and high-energy components of X-ray spectrum by means of filter, detecting transmitted radiation on a flat panel x-ray detector and processing data from the detector after completion of exposure, wherein filter is fixed on end of flat panel detector of X-ray radiation, 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 registers radiation, not interacting with filter, and forms first group of pixels, and other half of pixels of detector registers radiation passed through filter, and forms second group of pixels, wherein radiation detection condition is provided when combination of four adjacent pixels consists of two pixels of first group, detecting radiation, not interacting with filter and representing full spectrum of X-ray radiation, and two pixels of the second group, detecting radiation passing through the filter and representing high-energy component of the X-ray radiation spectrum, when processing data in each of the pixel groups, adding the signals, subtracting the signal of the second group of pixels from the first and obtaining information on the low-energy component of the X-ray spectrum obtained for the four pixels of the first and second groups, which is referred to the average pixel coordinate, then boundaries of patient's controlled area are determined and combined with data from remote beam therapy planning system. A device for implementing the method comprises an apparatus for remote radiation therapy, a filter configured to divide radiation transmitted through the patient's body region into low-energy and high-energy components of the X-ray spectrum, and a flat panel x-ray detector.

EFFECT: using the group of inventions makes it possible to improve the quality of obtained 2D images, including in cases when the analyzed area of the patient is in process of movement related to respiration or other physiological processes of the organism.

2 cl, 2 dwg