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Low-cost chest paediatric phantom for dose optimisation: construction and validation.

A Mohammed Ali1, S Al-Murshedi2

  • 1Department of Radiological Techniques, College of Health and Medical Technology, Al-Zahraa University for Women, Karbala, Iraq; Department of medical physics, College of Applied Medical Sciences, University of Kerbala, 56001 Karbala, Iraq.

Radiologia
|July 29, 2023
PubMed
Summary
This summary is machine-generated.

A new low-cost imaging phantom using cork, PVC, and water was developed for chest dose optimization studies. This cost-effective phantom accurately replicates radiological characteristics and is suitable for image quality evaluation.

Keywords:
AsequibleChest phantomDose optimizationFantoma torácicoGeneración de imágenes pediátricasLow-costOptimización de dosisPaediatric imagingPhantom validationValidación de fantoma

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Area of Science:

  • Medical Imaging Physics
  • Radiological Science

Background:

  • High-end imaging phantoms are expensive, limiting dose optimization studies.
  • There is a need for affordable, accessible phantom construction methods using readily available materials.

Purpose of the Study:

  • To develop a low-cost imaging phantom for chest dose optimization.
  • To evaluate the accuracy of tissue substitutes for simulating pediatric anatomy.
  • To assess image quality metrics for phantom validation.

Main Methods:

  • Theoretical calculations of radiological properties for lung, bone, and soft tissue substitutes (cork, PVC, water).
  • Validation using CT Hounsfield Units (HU) comparison with patient data.
  • Image quality assessment via Signal-to-Noise Ratio (SNR) and Contrast-to-Noise Ratio (CNR) under varying exposure parameters (kVp, mAs).

Main Results:

  • Tissue substitutes demonstrated high accuracy in theoretical calculations (e.g., PVC ≥5.78%, cork ≥4.46%, water ≥5%).
  • CT HU percentage differences between substitutes and real tissues were within acceptable ranges (e.g., cortical bone 0.53%-3.17%).
  • Strong positive correlations observed for SNR (kVp: 0.79, mAs: 0.65) and moderate correlations for CNR (kVp: 0.58, mAs: 0.53).

Conclusions:

  • The developed low-cost phantom effectively replicates the radiological characteristics of a one-year-old child's tissues.
  • The phantom's performance in SNR and CNR correlations confirms its suitability for imaging and dose optimization studies.
  • This research offers a viable, cost-effective alternative for essential medical imaging research.