Estimation of absorbed dose in organs using Waza-AriV2 web-based software in head CT scans

TL;DR

This study evaluates the accuracy of Waza-AriV2 software in estimating organ doses in head CT scans by comparing its calculations with direct postmortem measurements and other software, highlighting discrepancies and interpretation issues.

Contribution

The paper provides a corrected interpretation of Waza-AriV2 estimations and compares its performance with NCICT software in organ dose estimation for head CTs.

Findings

Significant discrepancies between estimated and measured doses were identified.

Correct interpretation of acquisition parameters improves estimation accuracy.

Comparison shows differences between Waza-AriV2 and NCICT software results.

Abstract

Recently, Yamashita et al. reported direct measurements of ionizing radiation doses to individual organs in postmortem (using OSL dosimetry) that were exposed in the most frequent clinical CT scan protocols, corresponding to the whole body, head, thorax and abdomen. The authors compare the experimental results with the values calculated in the Waza-AriV2 software, which is a system based on the MonteCarlo method that performs the estimation of organ doses from the exposure parameters used in the CT equipment. However, the results of the absorbed doses calculated in each examination had significant variations with respect to the doses measured directly in postmortem. In this communication, we made a calculation under the correct interpretation in one of the acquisition parameters (mA) which leads to a significant discrepancy between the estimated and measured values reported by Yamashita et al. We also make the comparison between the Waza-AriV2 and NCICT software.