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Impact of acquisition parameters on dose and image quality optimisation in paediatric pelvis radiography-A phantom

Ali Mohammed Ali1, Peter Hogg1, Mohamed Abuzaid2

  • 1School of Health Sciences, University of Salford, Salford, M6 6PU, United Kingdom.

European Journal of Radiology
|August 24, 2019
PubMed

Insights

This study optimized pediatric pelvis X-ray techniques for 1 and 5-year-olds, balancing image quality and radiation dose. Specific kilovoltage peak (kVp), milliampere-seconds (mAs), and source-detector distance (SDD) settings were identified for each age group.

Area of Science:

  • Radiological physics
  • Pediatric imaging
  • Medical imaging technology

Background:

  • Paediatric pelvis imaging lacks systematic dose optimisation studies considering age and size.
  • Digital radiography presents opportunities for dose reduction in paediatric X-rays.

Purpose of the Study:

  • To conduct dose optimisation studies for paediatric pelvis imaging using digital radiography.
  • To present data from dose optimisation studies using pelvis phantoms representing 1 and 5-year-old children.

Main Methods:

  • Systematic variations of acquisition factors (kVp, mAs, SDD, filtration) using a factorial design.
  • Assessment of image quality using visual grading analysis (VGA).
  • Measurement of radiation dose using surface dosimeters on paediatric phantoms.

Main Results:

  • Optimised techniques for 1-year-olds: 65 kVp, 2 mAs, 115 cm SDD.
  • Optimised techniques for 5-year-olds: 62 kVp, 8 mAs, 130 cm SDD.
  • Both techniques included 1 mm Al +0.1 mm Cu filtration; main effects analysis identified parameter influences on dose and quality.

Conclusions:

  • Factorial design effectively identified suitable acquisition factors for paediatric pelvis radiography.
  • A method was established for investigating combined effects of acquisition parameters on image quality and radiation dose in children.
Abstract

Keywords:
Digital radiographyPaediatric dose reductionPelvis radiography

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