FIELD: medicine.
SUBSTANCE: invention refers to medicine. A system for forming three-dimensional images of a patient's target area comprises at least one computer system configured to: receive a non-parallel projection image of the patient's target area formed using a projection beam having a plurality of beams; convert non-parallel projection image into non-spatial domain, wherein the non-parallel projection image formed using the projection beam having a plurality of beams is converted into a non-spatial domain based on vectors perpendicular to the corresponding beams, wherein said vectors are formed between isocenter of projection beam and corresponding points along corresponding beams, which are closer to isocenter than other points along corresponding beams; reconstruct a three-dimensional image from at least said non-parallel projection image in a non-spatial domain; and transform the reconstructed three-dimensional image from the non-spatial domain into a spatial domain. A computer-implemented method implemented by means of a system. Non-volatile computer-readable medium which is part of the system. In a second embodiment, a system for forming three-dimensional images of a patient's target area comprises: at least one computer system configured to: receive computed tomography image formation data with a conic beam having a plurality of beams; convert image forming data from spatial domain into first non-spatial domain, wherein image forming data are converted into a non-spatial domain based on vectors perpendicular to corresponding beams, wherein said vectors are formed between isocenter of conic beam and corresponding points along corresponding beams, which are closest to isocenter, than other points along corresponding beams; convert image forming data from a first non-spatial area to a second non-spatial domain; reconstruct a three-dimensional image from image forming data in at least one of a first non-spatial domain and a second non-spatial domain; and transform the reconstructed three-dimensional image from the second non-spatial domain into a spatial domain. A computer-implemented method implemented by means of the second version of the system. Non-volatile computer-readable medium, which is part of the second version of the system. In a third embodiment, a system for forming three-dimensional images of a target region of a patient comprises: at least one computer system configured to: receive a plurality of non-parallel projection images of the target region of the patient; convert a plurality of non-parallel projection images into a first representation in a three-dimensional non-spatial domain; converting a first representation in a three-dimensional non-spatial domain into a second representation in a one-dimensional non-spatial domain; reconstruct a three-dimensional image from a first and a second representation; and transform the reconstructed three-dimensional image from the non-spatial domain into a spatial domain. A method for forming three-dimensional images of a patient's target area, implemented by means of the third version of the system. Non-volatile computer-readable medium, which is part of the third version of the system. In the fourth embodiment, a system for forming three-dimensional images of a patient's target area comprises: at least one computer system configured to: receive a plurality of non-parallel projection images of the target region of the patient; convert a plurality of non-parallel projection images into non-spatial domains of d-space and k-space; reconstruct a three-dimensional image from a plurality of non-parallel projection images in non-spatial domains of d-space and k-space; and transform reconstructed three-dimensional image from non-spatial domains of d-space and k-space into spatial domain. A method for forming three-dimensional images of the target area of the patient, carried out by means of the fourth version of the system. Non-volatile computer-readable medium, which is part of the fourth version of the system.
EFFECT: technical result of the disclosed invention is to increase the accuracy of real-time imaging for the target area.
67 cl, 15 dwg
