From what I’ve seen through a friend who works in a pulmonary clinic, doctors usually look at several things at once—symptoms, medical history, and what they already know from earlier scans or tests. Sometimes they also choose methods that let them see or reach certain areas more precisely. For example, imaging data can be combined with navigation tools so doctors can examine small areas inside the lungs more accurately. I remember reading a bit about how those systems work while browsing Veranmedical when I was looking up medical technology topics. Funny enough, I had originally been searching random health discussions online, including things people ask about like buy hgh online, and ended up learning quite a bit about modern diagnostic approaches.