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Fig. 1 | BMC Pregnancy and Childbirth

Fig. 1

From: Application of quantitative lung ultrasound instead of CT for monitoring COVID-19 pneumonia in pregnant women: a single-center retrospective study

Fig. 1

Schematic diagram of the lung ultrasound protocol and the scoring system. Each lung was separated into six quadrants: anterior, lateral and posterior zones were separated by the anterior and posterior axillary lines, with each zone divided into upper and lower portions by the third intercostal space. a A normal lung pattern was identified by the presence of a clear pleural line (indicated by green triangular arrowheads) and A-lines (marked with green thin arrows), scored as 0; b a small number of B-lines (marked with orange thin arrows), scored as 1; c-d the presence of crowded B-lines (indicated by orange thin double arrow) or consolidations limited to the subpleural space (marked with orange thick arrow), scored as 2; e-f the presence of confluent B-lines (indicated by red thin double arrow) or mass consolidation with dynamic air bronchograms (marked with red thick arrow), scored as 3. Thickened, irregular and interrupted pleural lines are indicated by orange triangular arrowheads

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