Patent ID: 7342996
Filing Date: 2008-03-11
Classification: A61N,G01N

Abstract:
1. A method of radiotherapy of a malignant neoplasm using X-ray beams composed of two stages and comprising the steps of: during the first stage, imaging an internal structure of a patient's body part comprising the malignant neoplasm, together with the organs and tissues, surrounding it, identifying images of the structural elements relating to the malignant neoplasm, producing an exposure program as a set of X-ray dosages to be delivered to different parts of the malignant neoplasm, and thereafter, performing the second stage by executing the exposure program, wherein during the first stage, in order to obtain information about the patient's body part internal structure, X-rays of several X-ray sources are concentrated in a concentration zone located inside the patient's body part containing the malignant neoplasm using concentration devices having optical axes crossed in one point inside the concentration zone; secondary Compton radiation excited in said zone is transported to one or more detectors using one or more transportation devices having optical axes that pass through the crossing point of the optical axes of the concentration devices, said one or more transportation devices being arranged so as to prevent falling X-ray radiation of the X-ray sources onto inputs of the detectors directly or after passing through the patient's body the patient's body part comprising the malignant neoplasm is scanned by moving the concentration zone and the patient's body with respect to each other, coordinates of the crossing point of the concentration devices are registered. based on the secondary radiation intensity values obtained by said one or more detectors and registered concurrently with coordinates of said point in the concentration zone, density of the biological tissues in said point is determined, determined density values of the biological tissues, together with the corresponding values of coordinates of said point, are used for producing imaging distribution of the biological tissues densities within the patient's body part containing the malignant neoplasm, during the second stage, the volume occupied by the malignant neoplasm is scanned, at the same time concentrating X-rays using the concentration devices, so that positions, occupied by the concentration zone correspond to the parts of the malignant neoplasm, represented by the sets of the coordinates registered during the first stage as a result of identification of images of the structural elements related to the malignant neoplasm; and the exposure program is executed by increasing the x-rays intensity compared to the first stage, and controlling exposure time.