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CN-119548159-B - CT scanning equipment and rotation control method thereof

CN119548159BCN 119548159 BCN119548159 BCN 119548159BCN-119548159-B

Abstract

The application belongs to the field of medical equipment, and provides CT scanning equipment and a rotation control method thereof, wherein the CT scanning equipment comprises a rotor part, a stator part, a slot waveguide antenna, a coupling receiving antenna and a position detection unit; the slot waveguide antenna is arranged on one of the rotor part and the stator part, the coupling receiving antenna and the position detecting unit are arranged on the other of the rotor part and the stator part, the slot waveguide antenna is provided with a plurality of slots which are distributed at intervals around the rotation axis of the rotor part, the coupling receiving antenna is used for receiving electromagnetic waves radiated from the slots, and the position detecting unit is used for identifying the slots. According to the application, the slots on the slot waveguide antenna are used as the references for the position detection unit to identify, so that the reference for the position detection unit to identify such as a scale is not required to be additionally arranged on the rotor part or the stator part, and the production cost of the scanning equipment is reduced.

Inventors

  • DING GUANGXIN

Assignees

  • 上海联影医疗科技股份有限公司

Dates

Publication Date
20260512
Application Date
20241127

Claims (9)

  1. 1. A CT scanning device is characterized by comprising a rotor part (10), a stator part (20), a slot waveguide antenna (30), a coupling receiving antenna (40) and a position detection unit (50); -the slot waveguide antenna (30) is arranged on one of the rotor part (10) and the stator part (20), -the coupling receiving antenna (40) and the position detecting unit (50) are arranged on the other of the rotor part (10) and the stator part (20); The slot waveguide antenna (30) is provided with a plurality of slots (31), the slots (31) are distributed at intervals around a rotation axis (a) of the rotor part (10), the coupling receiving antenna (40) is used for receiving electromagnetic waves radiated from the slots (31), the position detecting unit (50) is used for identifying the slots (31), the coupling receiving antenna (40) and the position detecting unit (50) are arranged at intervals around the rotation axis (a), the slot waveguide antenna (30) comprises a carrier (32) with conductive media and slot conductors (33) arranged on the carrier (32), the carrier (32) is a part of the rotor part (10) or the stator part (20), the carrier (32) is provided with a plurality of grooves (321) distributed at intervals around the rotation axis (a), the slot conductors (33) are provided with a plurality of through holes (331) which are communicated with the grooves (321) one by one, and the through holes (331) and the corresponding grooves (321) form the slots (31).
  2. 2. The CT scanning device as claimed in claim 1, characterized in that the carrier (32) is provided with a limit slot (322), and the slotted conductor (33) is limited in the limit slot (322).
  3. 3. The CT scanner of claim 1, wherein the slot conductor (33) is an integrally formed strip-shaped metal conductor and the slot conductor (33) is arranged on the carrier (32) in a ring shape around the rotation axis (a), or wherein the slot conductor (33) comprises a plurality of strip-shaped metal conductors arranged on the carrier (32) in a ring-shaped array around the rotation axis (a).
  4. 4. The CT scanning device as claimed in any one of claims 1-3, characterized in that the CT scanning device further comprises an X-ray tube arranged on the rotor part, a plurality of the slits (31) having marking slits (311) for use as starting identification points of the position detection unit (50), the marking slits (311) being arranged in correspondence with the X-ray tube.
  5. 5. The CT scanning device as set forth in any one of claims 1-3, further comprising a radio frequency transmission unit (60), wherein the radio frequency transmission unit (60) is electrically connected to the slot waveguide antenna (30).
  6. 6. The CT scanning device as set forth in any one of claims 1-3, further comprising a waveguide load (70), wherein the waveguide load (70) is electrically connected to the slot waveguide antenna (30).
  7. 7. The CT scanning device as claimed in any one of claims 1-3, characterized in that the CT scanning device further comprises a radio frequency receiving unit (80), the radio frequency receiving unit (80) being electrically connected to the coupling receiving antenna (40).
  8. 8. A rotation control method of a CT scanning apparatus according to any one of claims 1 to 7, wherein the CT scanning apparatus comprises a rotor portion, a stator portion, a slot waveguide antenna, and a position detection unit, the rotation control method comprising: Acquiring slot parameters of a plurality of slots on the slot waveguide antenna, wherein the slot parameters are obtained by identifying the slots on the slot waveguide antenna through the position detection unit, and the slot parameters comprise positions and time points of the slots; Calculating the distance and time interval between two adjacent gaps according to the gap parameters; Calculating an actual speed of the rotor portion based on the distance and the time interval; And comparing the actual speed with a preset target speed, and adjusting the actual speed of the rotor part according to a comparison result.
  9. 9. The method for controlling rotation according to claim 8, wherein comparing the actual speed with a preset target speed and adjusting the actual speed of the rotor portion based on the comparison result comprises: Comparing the actual speed with the preset target speed, and if the actual speed is smaller than the preset target speed, adjusting the actual speed of the rotor part; And if the actual speed is greater than the preset target speed, reducing the actual speed of the rotor part.

Description

CT scanning equipment and rotation control method thereof Technical Field The application belongs to the technical field of medical equipment, and particularly relates to CT scanning equipment and a rotation control method thereof. Background An electronic computed tomography (Computed Tomography, abbreviated as CT) apparatus is a medical imaging technique apparatus, and a doctor can more accurately judge the condition of a subject through the examination of the CT scanning apparatus, thereby improving the diagnosis rate and cure rate of the disease, so that the CT scanning apparatus plays an irreplaceable role in clinical diagnosis and treatment. When a patient is scanned by a section of an existing CT scanning device, non-contact signal transmission is mainly carried out between a rotor part and a stator part of the CT scanning device through optical transmission of a slip ring or radio frequency capacitive coupling of a radio frequency capacitor, the actual speed of the rotor part and the rotation angle of the rotor part are determined through coding signals of a position coder, the position coder generally comprises a scale and a reading head matched with the scale, wherein the scale is arranged on the rotor part along the rotation axis of the rotor part and comprises a signal modulation scale pattern, the reading head is arranged on the stator part and used for identifying the scale, the reading head comprises a sensing element and a field generating coil surrounding an internal coil area, and the special position coder has complex structure and high cost, thereby increasing the production cost of the CT scanning device. Disclosure of Invention The embodiment of the application aims to provide a CT scanning device and a rotation control method thereof, which are used for solving the technical problem of high production cost of the CT scanning device in the prior art. In order to achieve the aim, the application adopts the technical scheme that the CT scanning equipment comprises a rotor part, a stator part, a slot waveguide antenna, a coupling receiving antenna and a position detection unit; The slot waveguide antenna is provided on one of the rotor portion and the stator portion, and the coupling receiving antenna and the position detecting unit are provided on the other of the rotor portion and the stator portion; The slot waveguide antenna is provided with a plurality of slots, the slots are distributed at intervals around the rotation axis of the rotor part, the coupling receiving antenna is used for receiving electromagnetic waves radiated from the slots, and the position detection unit is used for identifying the slots. Optionally, the slot waveguide antenna includes a carrier with a conductive medium and a slot conductor disposed on the carrier, where the carrier is a part of the rotor part or the stator part, and a plurality of grooves distributed at intervals around the rotation axis are disposed on the carrier, and the slot conductor is provided with a plurality of through holes in one-to-one correspondence with the grooves, and the through holes and the corresponding grooves form the slots. Optionally, a limiting groove is formed in the carrier, and the gap conductor is limited in the limiting groove. Optionally, the slit conductor is an integrally formed strip-shaped metal conductor, and the slit conductor is annularly arranged on the carrier around the rotation axis, or the slit conductor comprises a plurality of strip-shaped metal conductors, and the strip-shaped metal conductors are annularly arranged on the carrier around the rotation axis. Optionally, the CT scanning apparatus further includes an X-ray tube disposed on the rotor portion, and a plurality of the slits have a marking slit therein for serving as a start identification point of the position detecting unit, the marking slit being disposed in correspondence with the X-ray tube. Optionally, the CT scanning apparatus further includes a radio frequency transmitting unit, and the radio frequency transmitting unit is electrically connected to the slot waveguide antenna. Optionally, the CT scanning apparatus further comprises a waveguide load, and the waveguide load is electrically connected to the slot waveguide antenna. Optionally, the CT scanning apparatus further includes a radio frequency receiving unit, and the radio frequency receiving unit is electrically connected to the coupling receiving antenna. The application also provides a rotation control method of the CT scanning equipment, the CT scanning equipment comprises a rotor part, a stator part, a slot waveguide antenna and a position detection unit, and the rotation control method comprises the following steps: Acquiring slot parameters of a plurality of slots on the slot waveguide antenna, wherein the slot parameters are obtained by identifying the slots on the slot waveguide antenna through the position detection unit, and the slot parameters comprise positions and tim