A respiratory physiologist or a pulmonologist specializing in the human respiratory system, with in-depth knowledge of the anatomy, physiology, and functions of the lungs and airways.
So, I've been pondering the intricacies of alveolar ventilation lately, and honestly,  I'm finding myself a bit stumped on how to precisely measure regional differences in lung function during normal breathing in a truly non-invasive way; any thoughts on this, perhaps some innovative techniques I've overlooked?