Fig. 2
From: Ultrasonographic assessment of parasternal intercostal muscles during mechanical ventilation
Intercostal muscle ultrasound. The figure depicts an ultrasound image of parasternal intercostal muscle ultrasound. a The ultrasound probe position at the parasternal space. b The ultrasound image depicted by ultrasound using a B-mode setting in which the intercostal muscle lies between two ribs (R), cranial to the pleural line, behind the pectoral muscle. The left side is a schematic view of the ultrasound image. ICM intercostal muscle