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April 18, 2026Medical Physics0 citations

Determinants and expected differences in the calculation of CT effective dose conversion factors for various phantom sizes and scan parameters

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RCRenxin ChuJMJelena MihailovicCLChoonsik Lee

Key Points

  • This research seeks to identify key factors influencing CT effective dose calculations across different phantom sizes and scan configurations.
  • Analyzed DLP-normalized effective dose variations based on patient characteristics.
  • Utilized various phantom sizes to assess effective dose differences.
  • Applied traditional k-factor method with updated conversion factors for calculations.
  • Identified patient weight, height, and scan length as crucial factors for dose variations.
  • Observed significant variations in effective dose depending on the TCM model used.
  • Developed a practical framework for better estimating CT effective doses.

Abstract

Our study demonstrated the large variations of DLP-normalized effective dose. Standardized coefficients revealed that patient weight, height and/or scan length were the most crucial determinants. Depending on the specific TCM model used, even greater variations may be observed. This work also provided a practical framework for estimating CT effective dose using the traditional k-factor method with updated new conversion factors.

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Cite This Study

Chu et al. (2026) studied this question.

synapsesocial.com/papers/69e3213840886becb65405b2https://doi.org/10.1002/mp.70432
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