The effect of increased body mass index on patient dose in paediatric radiography

Arsenoi P Ladia1, Spyros G Skiadopoulos1, Anna Ν Karahaliou1

  • 1Department of Medical Physics, School of Medicine, University of Patras, Patras 26504, Greece.

Insights

Overweight children aged 5-6.5 years experience higher radiation doses and cancer risks during chest and abdomen X-rays. Increased body mass index (BMI) significantly impacts radiation exposure in paediatric radiography.

Area of Science:

  • Radiology
  • Paediatric Imaging
  • Radiation Dosimetry

Background:

  • Radiation protection is critical in paediatric radiology.
  • Childhood obesity rates are rising, potentially affecting radiation dose.
  • Understanding the impact of increased body mass index (BMI) on radiation exposure is essential.

Purpose of the Study:

  • To investigate the influence of increased BMI on radiation dose and associated risks in paediatric patients undergoing radiography.
  • To compare radiation doses and cancer risks between normal weight and overweight children.

Main Methods:

  • Studied 128 paediatric patients (aged 5-6.5 years) undergoing chest or abdomen radiography.
  • Categorized patients into normal and overweight groups based on BMI.
  • Calculated entrance surface dose (ESD), organ dose, effective dose (ED), and risk of exposure-induced cancer death (REID) using Monte Carlo simulation (PCXMC 2.0).

Main Results:

  • Overweight patients showed a statistically significant increase in radiation dose and REID compared to normal weight patients (p<0.001).
  • Percentage increases for overweight vs. normal weight patients included: ESD (13.6% chest, 15.0% abdomen), maximum organ dose (24.4% chest, 24.7% abdomen), ED (18.9% chest, 21.8% abdomen), and REID (20.6% chest, 19.8% abdomen).

Conclusions:

  • Increased BMI in paediatric patients leads to higher radiation doses in chest and abdomen radiography.
  • Overweight children face elevated risks of cancer induction from diagnostic imaging procedures.
  • Paediatric radiation protection strategies should consider patient BMI.

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