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Amy E Becker1, Andrew M Hernandez2, John M Boone1,2

  • 1Department of Biomedical Engineering, University of California Davis, Sacramento, CA 95817, United States of America.

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|October 20, 2020
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Summary
This summary is machine-generated.

A novel Multi-X-ray-source Array (MXA) prototype was designed for digital breast tomosynthesis. This array demonstrated promising performance with small focal spots and controlled X-ray output, advancing tomosynthesis imaging capabilities.

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Area of Science:

  • Medical Imaging
  • X-ray Technology
  • Radiological Physics

Background:

  • Digital breast tomosynthesis (DBT) requires advanced X-ray source technology for improved imaging.
  • Existing X-ray sources face limitations in speed and spatial resolution for DBT applications.

Purpose of the Study:

  • To design and evaluate a prototype Multi-X-ray-source Array (MXA) for digital breast tomosynthesis.
  • To assess the performance characteristics of a novel multi-source X-ray system.

Main Methods:

  • Fabrication and testing of prototype MXA systems with three and eleven source elements.
  • Characterization of focal spot size, X-ray spectra, tube output (air kerma), and half-value layer (HVL).
  • Evaluation of X-ray pulse width modulation and source switching times.

Main Results:

  • Prototype sources achieved focal spot sizes of 0.3 mm at 45 kV/50 mA.
  • Measured X-ray spectra matched molybdenum anode expectations, with output ranging from 0.6 to 17 mGy/100 mAs.
  • HVL measurements were between 0.5 mm Al and 0.8 mm Al; pulse widths were adjustable down to ~1 ms.

Conclusions:

  • The developed Multi-X-ray-source Array (MXA) prototype shows potential for digital breast tomosynthesis.
  • The system's performance in terms of focal spot size, X-ray output, and switching speed is suitable for advanced tomographic imaging.
  • Initial tomographic reconstruction results indicate the feasibility of the MXA for DBT applications.