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ESTIMATION OF PEDIATRIC DOSE DESCRIPTORS ADAPTED TO INDIVIDUAL SPECIFIC SIZE FROM CT EXAMINATIONS

Muhammad Kabir Abdulkadir1,2, Ibrahim Lutfi Shuaib1, Anusha Achuthan1,3

  • 1Advanced Medical and Dental Institute, Universiti Sains Malaysia, Kepala Batas, 13200 Penang, Malaysia.

Radiation Protection Dosimetry
|July 27, 2022
PubMed

Insights

Pediatric CT scans require size-specific dose estimates (SSDE) for accuracy. This study shows SSDE is crucial for personalized pediatric radiation dose estimation, reducing risks in children.

Area of Science:

  • Medical Physics
  • Radiology
  • Pediatric Imaging

Background:

  • Computed Tomography (CT) dose indices can be inaccurate for pediatric patients.
  • Size-Specific Dose Estimation (SSDE) offers a personalized approach to dose assessment.
  • Accurate pediatric dose estimation is vital for minimizing radiation risks.

Purpose of the Study:

  • To estimate pediatric radiation dose tailored to individual patient size.
  • To evaluate the correlation between effective diameter (Deff) and other factors like age and CTDIvol.
  • To highlight the clinical relevance of SSDE in pediatric CT imaging.

Main Methods:

  • Retrospective study of pediatric patients aged 0-12 years.
  • SSDE calculated from volume CT dose index (CTDIvol) using individual effective diameter (Deff).
  • Analysis of correlations between Deff, age, exposure settings, CTDIvol, and SSDE.

Main Results:

  • Malaysian pediatric patients had smaller average effective diameters than reference phantoms for head and abdomen.
  • SSDE was consistently higher than displayed CTDIvol, indicating underestimation of pediatric dose.
  • Statistically significant percentage differences in dose estimates (p < .001) ranged from 0-17% (head) and 37-60% (abdomen).

Conclusions:

  • Clinical implementation of SSDE is highly relevant for pediatric CT imaging.
  • SSDE provides more accurate, personalized radiation dose estimates for children.
  • Utilizing SSDE can significantly reduce radiation risks in pediatric patients undergoing CT scans.

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