Table 1.

Four different LUS methods to assess B-lines in SSc patients

	Anatomical line	LUS by Gargani et al. [23]		Comprehensive LUS [25]		Simplified LUS [25]		Modified LUS [26]
		Right	Left	Right	Left	Right	Left	Right	Left
Anterior	Parasternal	2nd–5th ICS	2nd–4th ICS	2nd–5th ICS	2nd–4th ICS	2nd ICS	2nd ICS
	Mid-clavicular	2nd–5th ICS	2nd–4th ICS	2nd–5th ICS	2nd–4th ICS	4th ICS	4th ICS	4th ICS	4th ICS
Lateral	Anterior axillary	2nd–5th ICS	2nd–4th ICS	2nd–5th ICS	2nd–4th ICS	4th ICS	4th ICS	4th ICS	4th ICS
	Mid-axillary	2nd–5th ICS	2nd–4th ICS	2nd–5th ICS	2nd–4th ICS	4th ICS	4th ICS	4th ICS	4th ICS
	Posterior axillary	2nd–10th ICS	2nd–10th ICS	7th–8th ICS	7th–8th ICS	8th ICS	8th ICS	8th ICS	8th ICS
Posterior	Sub-scapular	7th–10th ICS	7th–10th ICS	7th–8th ICS	7th–8th ICS	8th ICS	8th ICS	8th ICS	8th ICS
	Paravertebral	2nd–10th ICS	2nd–10th ICS	2nd–8th ICS	2nd–8th ICS	8th ICS	8th ICS
Total scanning sites		72 ScS		50 ScS		14 ScS		10 ScS

LUS lung ultrasound, SSc systemic sclerosis, ICS inter-costal space, ScS scanning sites