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. 2024 Jun;71(2):251-260.
doi: 10.1002/jmrs.772. Epub 2024 Mar 7.

Introducing fitting models for estimating age-specific dose and effective dose in paediatric patients undergoing head, chest and abdomen-pelvis imaging protocols: a patient study

Mohammad Reza Deevband  1 , Habib Mohammadi  1 , Yazdan Salimi  1 , Ahmad Mostaar  1 , Niloofar Deravi  2 , Mobina Fathi  2 , Kimia Vakili  2 , Shirin Yaghoobpoor  2 , Mehdi Ghorbani  1 , Abolhasan Divband  3 , Meysam Tavakoli  4
Affiliations

Introducing fitting models for estimating age-specific dose and effective dose in paediatric patients undergoing head, chest and abdomen-pelvis imaging protocols: a patient study

Mohammad Reza Deevband et al. J Med Radiat Sci. 2024 Jun.

Abstract

Introduction: Concerns regarding the adverse consequences of radiation have increased due to the expanded application of computed tomography (CT) in medical practice. Certain studies have indicated that the radiation dosage depends on the anatomical region, the imaging technique employed and patient-specific variables. The aim of this study is to present fitting models for the estimation of age-specific dose estimates (ASDE), in the same direction of size-specific dose estimates, and effective doses based on patient age, gender and the type of CT examination used in paediatric head, chest and abdomen-pelvis imaging.

Methods: A total of 583 paediatric patients were included in the study. Radiometric data were gathered from DICOM files. The patients were categorised into five distinct groups (under 15 years of age), and the effective dose, organ dose and ASDE were computed for the CT examinations involving the head, chest and abdomen-pelvis. Finally, the best fitting models were presented for estimation of ASDE and effective doses based on patient age, gender and the type of examination.

Results: The ASDE in head, chest, and abdomen-pelvis CT examinations increases with increasing age. As age increases, the effective dose in head and abdomen-pelvis CT scans decreased. However, for chest scans, the effective dose initially showed a decreasing trend until the first year of life; after that, it increases in correlation with age.

Conclusions: Based on the presented fitting model for the ASDE, these CT scan quantities depend on factors such as patient age and the type of CT examination. For the effective dose, the gender was also included in the fitting model. By utilising the information about the scan type, region and age, it becomes feasible to estimate the ASDE and effective dose using the models provided in this study.

Keywords: Absorbed dose; CT scan; age‐specific dose estimates; effective dose; paediatric.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
ASDE (mGy) versus age group for head, chest and abdomen–pelvis imaging protocols.
Figure 2
Figure 2
Organ dose (mGy) for head, chest and abdomen–pelvis imaging protocols for male and female patients with 0 year age.
See this image and copyright information in PMC

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