To B or not to B-lines [editorial]

With great interest, we have read the paper from Boero et al. titled “Lung Ultrasound among Expert Operators: Scoring and Inter-rater Reliability Analysis (LESSON study), a secondary COWS study analysis from the ITALUS group”, which provides a focused evaluation of lung ultrasound (LUS). The author’s analysis reflects the increasing use of LUS as a valuable diagnostic and monitoring tool for assessing pulmonary conditions worldwide. The study is particularly noteworthy for emphasizing the inter-rater reliability of the LUS score among expert practitioners, whose assessments are crucial in determining the relevance of LUS in clinical practice. By analyzing data from skilled clinicians, the article highlights the reliability of the LUS score when labeling ultrasound (US) video clips recorded from patients with COVID-19 pneumonia]. This focus is valuable, as skilled performance can establish benchmarks to define training standards for clinical practice through LUS assessment standardization.