# US 2010/0166137 A1 · Pet device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0166137 A1 - Document ID: US20100166137A1 - Status: Published application - Kind: A1 - Application number: 12/633,282 - Filed: 2009-12-08 - Published: 2010-07-01 - Earliest claimed: 2008-12-25 - Assignees: Kabushiki Kaisha Toshiba; Toshiba Medical Systems Corporation - Inventors: Yuuji SAWANAGA - Web page: https://patentgrep.com/patent/US20100166137A1 ## CPC - A61B 6/032: {Transmission computed tomography [CT]} - A61B 6/037: {Emission tomography} - A61B 6/481: {involving the use of contrast agents} - A61B 6/5235: {combining images from the same or different ionising radiation imaging techniques, e.g. PET and CT} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A gantry has a cylindrical shape and rotates around a subject on a top panel about the body axis. An X-ray irradiating part is arranged inside the gantry and emits an X-ray. An X-ray detector is arranged at a position facing the X-ray irradiating part and detects the X-ray transmitted through the subject. PET detectors are arranged in two separate regions facing the rotation center and detect γ-rays emitted from the positron-emitting nuclides. A moving mechanism moves the top panel and the gantry relatively to each other. An X-ray CT image generator generates an X-ray CT image of the subject based on the result of detection by the X-ray detector. A PET image generator generates a PET image of the subject based on the γ-rays detected by the PET detectors on the circumference in accordance with rotation of the gantry. ## Claims ### Claim 1 A PET device comprising: a top panel on which a subject to which an agent labeled with positron-emitting nuclides have been administered is placed; a cylindrical gantry configured to rotate around the subject about a body axis of the subject; an X-ray irradiating part arranged inside the gantry and configured to irradiate an X-ray; an X-ray detector arranged at a position facing the X-ray irradiating part inside the gantry and configured to detect the X-ray having been transmitted through the subject; two PET detectors arranged in two regions facing a rotation center inside the gantry and configured to detect γ-rays emitted from the positron-emitting nuclides; a moving mechanism configured to move the top panel and the gantry relatively to each other; an X-ray CT image generator configured to generate an X-ray CT image of an inside of the subject based on a result of detection by the X-ray detector; and a PET image generator configured to generate a PET image of the inside of the subject based on the γ-rays detected by the PET detectors on a circumference in accordance with rotation of the gantry. ### Claim 2 (depends on 1) The PET device according to claim 1, wherein the X-ray detector and the PET detector are arranged on substantially same circumferences and are sized so as not to overlap each other. ### Claim 3 (depends on 1) The PET device according to claim 1, further comprising a fusion part configured to superimpose the X-ray CT image based on data detected by the X-ray detector and the PET image based on γ-rays detected by the PET detector to generate a PET/CT fusion image. ### Claim 4 (depends on 2) The PET device according to claim 2, further comprising a fusion part configured to superimpose the X-ray CT image based on data detected by the X-ray detector and the PET image based on γ-rays detected by the PET detector to generate a PET/CT fusion image. ### Claim 5 (depends on 1) The PET device according to claim 1, wherein the PET detector is composed of a semiconductor detector. ### Claim 6 (depends on 2) The PET device according to claim 2, wherein the PET detector is composed of a semiconductor detector. ### Claim 7 (depends on 3) The PET device according to claim 3, wherein the PET detector is composed of a semiconductor detector. ### Claim 8 (depends on 4) The PET device according to claim 4, wherein the PET detector is composed of a semiconductor detector. ### Claim 9 (depends on 1) The PET device according to claim 1, wherein communication between the X-ray detector and the X-ray CT image generator and communication between the PET detector and the PET image generator are performed via noncontact data transmission. ### Claim 10 (depends on 2) The PET device according to claim 2, wherein communication between the X-ray detector and the X-ray CT image generator and communication between the PET detector and the PET image generator are performed via noncontact data transmission. ### Claim 11 (depends on 3) The PET device according to claim 3, wherein communication between the X-ray detector and the X-ray CT image generator and communication between the PET detector and the PET image generator are performed via noncontact data transmission. ### Claim 12 (depends on 4) The PET device according to claim 4, wherein communication between the X-ray detector and the X-ray CT image generator and communication between the PET detector and the PET image generator are performed via noncontact data transmission. ### Claim 13 (depends on 5) The PET device according to claim 5, wherein communication between the X-ray detector and the X-ray CT image generator and communication between the PET detector and the PET image generator are performed via noncontact data transmission. ### Claim 14 (depends on 6) The PET device according to claim 6, wherein communication between the X-ray detector and the X-ray CT image generator and communication between the PET detector and the PET image generator are performed via noncontact data transmission. ### Claim 15 (depends on 7) The PET device according to claim 7, wherein communication between the X-ray detector and the X-ray CT image generator and communication between the PET detector and the PET image generator are performed via noncontact data transmission. ### Claim 16 (depends on 8) The PET device according to claim 8, wherein communication between the X-ray detector and the X-ray CT image generator and communication between the PET detector and the PET image generator are performed via noncontact data transmission.