VIM and pulmonary fibrosis: Other groups have used integrin αvβ6–targeted PET and SPECT imaging to detect idiopathic pulmonary fibrosis using cystine-knot peptide,16,26 [18F]F-A20FMDV2,6 and vimentin-targeting peptide (for SPECT imaging),27 whereas our work focused on imaging integrin αvβ6 expression in an RIPF model.