Often clinical diagnosis based on history of<unk>  use, presence of ground glass opacities on CT, and exclusion of alternate diagnoses (such as pneumonia)
CT chest:
Ground glass opacities with interstitial or alveolar inflitrations and lung nodules
Pleural thickening and pleural effusions
Ground glass opacities with interstitial or alveolar inflitrations and lung nodules
Pleural thickening and pleural effusions
Amiodarone pulmonary toxicity
Pneumonia
Digoxin toxicity
CHF
Theophylline toxicity
Pulmonary fibrosis
Cocaine-associated chest pain
Interstitial lung disease