BAL	Broncho-alveolar lavage
BOOP	bronchiolitis obliterans organizing pneumonia
CT	computed tomography
DAD	diffuse alveolar damage
DIILD	drug induced interstitial lung disease
DTPA	diethylene-triamine-pentaacetate
HMPAO	hexamethylene-propylene amine oxime
IBs	imaging biomarkers
IMI	Innovative Medicines Initiative
IPF	idiopathic pulmonary fibrosis
i.t.	intratracheal
i.v.	intravenous
i.l.	intralobular
i.n.	intranasal
i.p.	intraperitoneal
LPS	lipopolysaccharide
MRI	magnetic resonance imaging
NSIP	nonspecific interstitial pneumonia
TRISTAN	Translational Imaging in Drug Safety Assessment
PET	positron emission tomography
PRISMA	Preferred Reporting Items for Systematic reviews and Meta-analyses
SPECT	Single-photon emission computed tomography
s.c.	subcutaneous
TNF-α	Tumor necrosis factor-alpha
t.t.	transtracheal
UIP	usual interstitial pneumonia-like pattern