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A Field Emission X-Ray Source Array for Stationary Digital Chest Tomosynthesis Applications.

Huaping Tang^1,2, Fengyan Zhang¹, Guoyu Li¹

¹NuRay Technology Co., Ltd., Changzhou 213000, China.

Sensors (Basel, Switzerland)

|June 12, 2026

Summary

Researchers developed a novel multi-beam X-ray source for stationary digital chest tomosynthesis (sDCT) systems. This innovation enhances diagnostic efficiency and reduces radiation dose for pulmonary imaging.

Keywords:

carbon nanotube field emission cathode high mAs multi-beam X-ray source stationary digital chest tomosynthesis

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Area of Science:

Medical Imaging
X-ray Technology
Radiological Physics

Background:

Digital chest tomosynthesis (DCT) offers improved diagnostic efficiency and reduced radiation dose for pulmonary disease detection.
Stationary DCT (sDCT) systems further enhance image quality by minimizing motion artifacts from X-ray source and patient movement.

Purpose of the Study:

To develop and validate a multi-beam X-ray source specifically designed for mobile stationary digital chest tomosynthesis (sDCT) systems.
To address the need for advanced X-ray source architectures that improve sDCT performance and facilitate engineering development.

Main Methods:

Design and specification definition of a multi-beam X-ray tube featuring 63 linear focal spots over 816 mm.
Experimental validation of the X-ray source, including angular span (36°), source image distance (120 cm), and detector coverage (35.6 cm × 43.2 cm).
Characterization of operational parameters: 140 kV max anode voltage, 20 mA max anode current, 24 mAs per scan, and 0.6 IEC focal spot size.

Main Results:

Successful development of a multi-beam X-ray source enabling a 36° angular span for sDCT applications.
Achieved full coverage of a large-area detector (35.6 cm × 43.2 cm) at a standard source image distance (120 cm).
The developed source demonstrates key performance breakthroughs relevant to sDCT system optimization.

Conclusions:

The novel multi-beam X-ray source represents a significant advancement for stationary digital chest tomosynthesis.
This technology provides a viable alternative architecture for future sDCT implementations, potentially enhancing system performance.
Further engineering development and system optimization are facilitated by this innovative X-ray source design.