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Precise X-ray Visualization by Double Network Polymeric Gel.

Zhihao Wang1, Qinqin Xiang2, Lei Yu1

  • 1National Key Laboratory of Neutron Science and Technology, Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621000, China.

ACS Applied Materials & Interfaces
|April 30, 2026
PubMed
Summary
This summary is machine-generated.

This study introduces a novel gel dosimeter that uses radiation-induced expansion for accurate radiotherapy dose verification. This new dosimeter offers improved stability and 3D printing capabilities, overcoming limitations of current technologies.

Keywords:
3D printinghigh spatial resolutionlow dose−responsephotonic crystal gel dosimeterradiation-induced polymerization

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Area of Science:

  • Medical Physics
  • Materials Science
  • Radiotherapy Technology

Background:

  • Gel dosimeters are crucial for radiotherapy dose verification due to their tissue equivalence.
  • Current gel dosimeters face challenges like complex readout, low spatial resolution, and post-irradiation instability.

Purpose of the Study:

  • To develop a novel gel dosimeter with enhanced spatial resolution, stability, and 3D printing capabilities for advanced radiotherapy verification.
  • To address the limitations of existing gel dosimeters in clinical applications.

Main Methods:

  • Utilized radiation-induced expansion in a double network gel dosimeter to create a dose-dependent redshift in structural color.
  • Characterized the dosimeter's sensitivity, spatial resolution, and stability under various environmental conditions, including UV irradiation and drying-wetting cycles.
  • Demonstrated the feasibility of 3D printing complex shapes with the developed gel dosimeter.

Main Results:

  • Achieved a maximum sensitivity of 35.8 nm/Gy for X-ray detection within the 0-10 Gy range.
  • Demonstrated a spatial resolution exceeding 50 μm.
  • Exhibited excellent stability against UV irradiation and retained dosimetric information after 10 drying-wetting cycles.
  • Successfully 3D printed complex shapes, a novel capability for gel dosimeters.

Conclusions:

  • The developed double network gel dosimeter offers a promising solution for spatially precise radiotherapy dose verification.
  • Its enhanced stability, sensitivity, and 3D printing potential overcome key limitations of existing technologies.
  • This innovation paves the way for more advanced and accurate radiotherapy treatments.