# US 12,761,301 B2 · Antenna assembly for a tomography system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,761,301 B2 - Document ID: US12761301B2 - Status: Granted - Kind: B2 - Application number: 18/444,963 - Filed: 2024-02-19 - Published: 2024-08-29 - Granted: 2026-10-13 - Earliest claimed: 2023-02-23 - Assignees: Forschungszentrum Julich GmbH - Applicants: Forschungszentrum Jülich GmbH - Inventors: Chang-Hoon Choi; Nadim Joni Shah; Jörg Felder - Web page: https://patentgrep.com/patent/US12761301B2 ## CPC - G01R 33/481: {MR combined with positron emission tomography [PET] or single photon emission computed tomography [SPECT]} - G01R 33/34038: {Loopless coils, i.e. linear wire antennas} - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) ## Abstract The present disclosure relates to an antenna assembly for an imaging method, a use of an antenna assembly and a tomography system, in particular for MRI or simultaneous MR-PET/-SPECT. An antenna assembly for an imaging method comprises at least two antennas, wherein each of the two antennas is designed as a J-pole antenna with a radiation section and a feed section. The radiation sections of the two antennas are arranged crossing each other. In this way, effective decoupling of the antennas is achieved by simple means. ## Claims ### Claim 1 An antenna assembly for an imaging method, the antenna assembly comprising at least two antennas, each of the two antennas configured as a J-pole antenna with a radiation section and a feed section, wherein the radiation sections of the two antennas are arranged crossing each other, and wherein the antenna assembly is an antenna assembly for magnetic resonance imaging (MRI), ultra-high field MRI, MR positron emission tomography (MR-PET), MR single proton emission computed tomography (MR-SPECT), MR linac and/or MR ultrasound. ### Claim 2 (depends on 1) The antenna assembly of claim 1, wherein the antenna assembly is an antenna assembly for simultaneous MR-PET/-SPECT. ### Claim 3 (depends on 1) The antenna assembly of claim 1, wherein the radiation sections of the two antennas form an angle α between 30° and 90° between one another. ### Claim 4 (depends on 3) The antenna assembly of claim 3, wherein the radiation sections of the two antennas form an angle α between 45° and 90° between one another. ### Claim 5 (depends on 1) The antenna assembly of claim 1, wherein the two antennas are substantially arranged in a common plane. ### Claim 6 (depends on 5) The antenna assembly of claim 5, wherein each pair of antennas is arranged in a plane, wherein the planes of two adjacent pairs of antennas form an angle β between each other, wherein: β=0° or 0°<β≤90°. ### Claim 7 (depends on 1) The antenna assembly of claim 1, wherein the antenna assembly comprises several pairs of two antennas arranged crossing each other in each case. ### Claim 8 (depends on 1) The antenna assembly of claim 1, wherein the radiation section of each of the two antennas is produced from a material substantially transparent to PET and/or SPECT. ### Claim 9 (depends on 1) The antenna assembly of claim 1, wherein the antenna assembly has between 4 and 32 antennas. ### Claim 10 (depends on 8) The antenna assembly of claim 8, wherein the radiation section of each of the two antennas consists essentially of copper or aluminum. ### Claim 11 (depends on 9) The antenna assembly of claim 9, wherein the antenna assembly has between 6 and 16 antennas. ### Claim 12 (depends on 1) The antenna assembly of claim 1, wherein the antennas of the antenna assembly define a hollow body in which a body or a body part can be arranged. ### Claim 13 (depends on 12) The antenna assembly of claim 12, wherein the hollow body has a circular cylindrical basic shape. ### Claim 14 (depends on 1) The antenna assembly of claim 1, wherein the antenna assembly has a radiation part and a feed part adjacent to the radiation part, wherein the radiation sections of the antennas are arranged in the radiation part and the feed sections of the antennas are arranged in the feed part. ### Claim 15 (depends on 1) The antenna assembly of claim 1, wherein the antenna assembly comprises at least two antennas arranged adjacent to each other, which are designed as J-pole antennas with a radiation section and a feed section, wherein the at least two antennas are arranged alternately at a first angle and a second angle different from the first angle in relation to a reference surface. ### Claim 16 (depends on 4) The antenna assembly of claim 4, wherein the two antennas are substantially arranged in a common plane. ### Claim 17 (depends on 1) The antenna assembly of claim 1, wherein each pair of antennas is arranged in a plane, wherein the planes of two adjacent pairs of antennas form an angle β between each other, wherein: β=0° or 0°<β≤90°. ### Claim 18 (depends on 1) The antenna assembly of claim 1, wherein the antenna assembly has a radiation part and a feed part adjacent to the radiation part, wherein the radiation sections of the antennas are arranged in the radiation part and the feed sections of the antennas are arranged in the feed part. ### Claim 19 A method of using an antenna assembly in a tomography system, the method comprising providing the antenna assembly having at least two antennas, each of the two antennas configured as a J-pole antenna with a radiation section and a feed section, wherein the radiation sections of the two antennas are arranged crossing each other, and acquiring imaging via MRI or simultaneous MR-PET/-SPECT using the antenna assembly. ### Claim 20 A tomography system adapted for MRI or simultaneous MR-PET/-SPECT, the system comprising an antenna assembly having at least two antennas, each of the two antennas configured as a J-pole antenna with a radiation section and a feed section, wherein the radiation sections of the two antennas are arranged crossing each other, and wherein the antenna assembly is arranged in particular such that the feed sections are located outside a measuring range of the tomography system.