"are there extra lines in the periphery that aren't vessels?"
"A: airways (intraluminal mass, narrowing, splayed carina)"
"B: breathing (lungs, pulmonary vessels, pleural spaces)"
"E: external e.g. chest wall (ribs, shoulder girdles, fractures), soft tissues"
"F: foreign material (devices, foreign bodies, gossypibomas)"
Expected headings
"Airways"
"Breathing"
"Circulation"
"Diaphragm and below"
"External (chest wall, shoulder girdles etc)"
"Foreign material"
"compare the apical, upper, middle and lower zones in turn"
"check the vertebral bodies; at each level you should see two eyes (pedicles), a mouth (interlaminar space) and a nose (spinous process):"