# US 2013/0170625 A1 · System for X-Ray Irradiation of Target Volume > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0170625 A1 - Document ID: US20130170625A1 - Status: Published application - Kind: A1 - Application number: 13/817,562 - Filed: 2011-08-18 - Published: 2013-07-04 - Earliest claimed: 2010-08-19 - Assignees: Convergent R.N.R Ltd - Inventors: Zeev Burshtein; Aharon Bar-David; Zeev Harel - Web page: https://patentgrep.com/patent/US20130170625A1 ## CPC - G21K 1/06: using diffraction, refraction or reflection, e.g. monochromators (G21K1/10, G21K7/00 take precedence) - G21K 1/046: {varying the contour of the field, e.g. multileaf collimators} - A61N 5/1042: {with spatial modulation of the radiation beam within the treatment head} - A61N 5/1084: {for delivering multiple intersecting beams at the same time, e.g. gamma knives} - A61N 2005/1091: {Kilovoltage or orthovoltage range photons} - A61N 2005/1095: {Elements inserted into the radiation path within the system, e.g. filters or wedges} - G21K 5/04: with beam-forming means - G21K 2201/062: the element being a crystal - G21K 2201/064: having a curved surface - G21K 2201/067: Construction details - G21K: HANDLING OF PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES - A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B) ## Abstract An X-ray system is arranged for providing X-ray exposure to a target volume. The aforesaid X-ray system comprises an X-ray source and at least one focusing lens. The provided exposure is distributed over a volume of the target in a substantially uniform manner. ## Claims ### Claim at position 1 1-23. (canceled) ### Claim 24 An X-ray system arranged for providing X-ray exposure to a target volume comprising an X-ray source and at least one focusing lens wherein said exposure is distributed over a volume of said target in a substantially uniform manner. ### Claim 25 An X-ray system arranged for providing X-ray exposure to a target volume; said system comprising (a) an X-ray source; and, (b) at least one focusing lens configured for focusing radiation emitted by said source, said lens being axially symmetric; said lens comprising Bragg-type lens elements longitudinally arranged for Bragg X-ray diffraction of said radiation; wherein an emitting aperture of a variable shape of said source is extendable such that said lens provides a substantially uniform convergent X-ray beam of a controllable waist size comparable with dimensions of said target volume. ### Claim 26 (depends on 25) The X-ray system according to claim 25, wherein said X-ray source is substantially polychromatic. ### Claim 27 (depends on 25) The X-ray system according to claim 25, wherein at least two lenses are arranged to provide converging X-rays to the target volume. ### Claim 28 (depends on 25) The X-ray system according to claim 25, wherein at least two lenses coaxially nested one into another. ### Claim 29 (depends on 27) The X-ray system according to claim 27, wherein said lenses are coaxial; said lenses have different focal distances so that focal spots individually created by each lens are longitudinally displaced to provide substantially uniform X-ray exposure over said target volume. ### Claim 30 (depends on 25) The X-ray system according to claim 25, further comprising at least one lens segment having a symmetry axis which is angularly displaced relative to said symmetry axis so that a focal spot created by said lens segment is transversely displaced relative to said focal spot created by said at least one lens to provide laterally extended resultant focal spot with substantially uniform X-ray exposure over said target volume. ### Claim 31 (depends on 28, 29, 30) The X-ray system according to claim 28, 29 or 30, comprising changeable lenses configured with different focal distances and lateral and longitudinal dimensions of said focal spot. ### Claim 32 (depends on 31) The X-ray system according to claim 31, provided with a lens wheel being rotatable around an axis parallel to said lens axes; said lenses are changeable by means of rotation of said wheel. ### Claim 33 The X-ray lens configured for focusing radiation emitted by said source, said lens being axially symmetric; said lens comprising Bragg-type lens elements longitudinally arranged for Bragg X-ray diffraction of said radiation; wherein a reflecting surface of said focusing lens configured into a tiled structure, at least one cell of said tiled structure has a convex surface of a predetermined negative radius, so that said cell diffracts incident X-rays into a diverging sub X-ray beam. ### Claim 34 A method of providing X-ray exposure to a target volume wherein said exposure is distributed over said target volume in a substantially uniform manner. ### Claim 35 A method of providing X-ray exposure to a target volume; said method comprising the steps of: (a) providing a system arranged for providing X-ray exposure to a target volume; said system comprising i. an X-ray source; and, ii. at least one focusing lens configured for focusing radiation emitted by said source, said lens being axially symmetric; said lens comprising crystal lens elements longitudinally arranged for Bragg X-ray diffraction of said radiation; (b) emitting X-ray radiation; and, (c) focusing said emitted radiation by said focusing lens within said target volume; wherein said radiation is emitted by an extendable aperture of a variable shape of said source; said radiation is converted into a substantially uniform convergent X-ray beam of a controllable waist size comparable with a size of said target volume. ### Claim 36 (depends on 35) The method according to claim 35, wherein said step of focusing is performed by at least two lenses arranged to provide converging X-rays to the target volume. ### Claim 37 (depends on 24) The method according to claim 24, wherein said step of focusing is performed by at least two lenses coaxially nested one into another. ### Claim 38 (depends on 36) The method according to claim 36, wherein said step of focusing is performed by said lenses which are coaxial; said lenses have different focal distances so that focal spots individually created by each lens are longitudinally displaced to provide uniform X-ray exposure over said target volume. ### Claim 39 (depends on 35) The method according to claim 35, wherein said step of focusing is performed by at least one lens segment having a symmetry axis which is angularly displaced relative to said symmetry axis so that a focal spot created by said lens segment is transversely displaced relative to said focal spot created by said at least one lens to provide extended resultant focal spot with laterally uniform X-ray exposure over said target volume. ### Claim 40 (depends on 37, 38, 39) The method according to claim 37, 38 or 39, comprising a step of replacing said lenses configured with different focal distances and waists. ### Claim 41 (depends on 37) The method according to claim 37, comprising a step of rotating a lens wheel around an axis parallel to said lens axes; said lenses are changeable by means of rotation of said wheel. ### Claim 42 (depends on 37) The method according claim 37, wherein said focusing is performed by a reflecting surface of said focusing lens configured into a tiled structure, at least one tile of said structure has a convex surface of a predetermined negative radius, so that said tile diffracts incident X-rays into a diverging partial sub X-ray beam within the overall converging beam.