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Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
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Brachytherapy Localization Radiographs with Conventional Diagnostic X-Ray Machine.

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Summary

This study modified an old X-ray machine to achieve an isocentric setup for patient imaging. This innovation allows for anteroposterior and lateral radiographs without patient repositioning, improving diagnostic accuracy.

Keywords:
Diagnostic X-ray machineshigh-dose rate brachytherapylocalizationtreatment planning

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Area of Science:

  • Medical Imaging
  • Radiotherapy Physics

Background:

  • Conventional diagnostic X-ray machines often require patient repositioning for anteroposterior (AP) and lateral (Lat) radiographs.
  • This limitation complicates imaging procedures, particularly for patients undergoing radiotherapy.

Purpose of the Study:

  • To develop an adaptable imaging setup for obtaining AP and Lat radiographs without altering patient posture.
  • To assess the feasibility of using modified conventional X-ray equipment for radiotherapy localization and treatment planning.

Main Methods:

  • A 1995 model 300 mA X-ray machine with a fluoroscopy screen was modified.
  • The fluoroscopy screen was replaced with a counterweight, and the hoist pillar was adjusted for an isocentric setup with a hospital stretcher.
  • The modified setup was tested for acquiring radiographs for brachytherapy localization and treatment field checks.

Main Results:

  • An isocentric setup was successfully achieved for a hospital stretcher positioned near the chest stand.
  • Acceptable AP-Lat radiographs were obtained for brachytherapy localization using a "Perspex jig".
  • The setup proved effective for field check radiographs in head and neck and esophagus cancer patients.

Conclusions:

  • Modification of conventional X-ray machines can enable an isocentric imaging setup.
  • This cost-effective adaptation facilitates essential radiographic procedures for radiotherapy localization and planning.
  • The improved setup enhances patient comfort and potentially reduces imaging time and associated errors.