History 1:  Chronic cough

History 2:  

Acute chest pain and shortness of breath

History 3:  

Asymptomatic (CT done as normal control for a clinical study)

Consider the following histories for each case and decide what you think are some possible diagnoses (there are many correct answers):

Review these two sets of CT images on two different patients. Which one has an ALVEOLAR process and which one is INTERSTITIAL?