Toslak IE, Maleeva AS, Martin B, et al. - In the present study, the researchers sought to assess the diagnostic efficiency of quantitative gray-scale ultrasound based on PACS as an objective method for evaluating pediatric thyroiditis. Ultrasound images obtained quantitative measurements of the thyroid echo-intensity level, retrospectively using a PACS-based tool in 37 children with the tissue-proven diagnosis. There was no significant difference between thyroiditis and normal thyroid groups for either thyroid/muscle ratio, calculated by dividing the mean echo intensity of thyroid by that of adjacent strap muscle, or heterogeneity index, calculated by dividing thyroid standard deviation (SD) by thyroid mean values. US quantitative gray-scale echo intensity analysis was not adequate to diagnose thyroiditis in a pediatric population. Consensus qualitative ultrasound analysis was more consistent with pathological diagnosis.