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Note: A data acquisition system for a high phase contrast medical computed tomography prototype.

Rongqi Sun1, Lian Chen2, Wenbin Wei3

  • 1Department of Engineering and Applied Physics, University of Science and Technology of China, Hefei 230026, China.

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A new Data Acquisition (DAQ) system enhances medical computed tomography (CT) imaging. This system utilizes three-grating interferometry for high phase contrast, improving diagnostic capabilities.

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Area of Science:

  • Medical Imaging
  • Physics
  • Engineering

Background:

  • High phase contrast medical computed tomography (CT) requires advanced data acquisition.
  • Three-grating interferometry is a key technology for phase contrast imaging.

Purpose of the Study:

  • To design and implement a robust Data Acquisition (DAQ) system for a high phase contrast medical CT prototype.
  • To ensure efficient and accurate data collection and transmission for improved CT imaging.

Main Methods:

  • The DAQ system integrates 43 detector boards, 3 data collection boards, and a data transmission board (DTB).
  • Data transmission utilizes a slip ring and gigabit Ethernet for communication between the DTB and a personal computer.
  • Readout electronics achieve an efficient resolution of up to 14.6 bit with integral nonlinearity below 0.1%.

Main Results:

  • The DAQ system successfully collects and transmits digitized data from all detector boards.
  • The system demonstrates high resolution and low nonlinearity, crucial for precise CT imaging.
  • An air scan algorithm effectively calibrates channel gain non-uniformity.

Conclusions:

  • The developed DAQ system is suitable for high phase contrast medical CT applications.
  • The system's design ensures reliable data handling and transmission for advanced imaging.
  • This technology contributes to the advancement of phase contrast CT imaging techniques.