What is the difference between 1 view and 4 views of the chest wall when it comes to diagnosing PTX with US?
a) 1 view assesses only the anterior chest wall, while 4 views assess all chest walls
b) 1 view provides a limited view of the pleural space, while 4 views provide a comprehensive view
c) 1 view uses color Doppler imaging, while 4 views use grayscale imaging
d) There is no difference; both methods are equally effective