For example, molecular imaging of C–C chemokine receptor 2 (CCR2) by 64Cu-DOTA-ECL1i detects monocyte recruitment in murine models of acute lung injury (ALI) [16] and lung fibrosis [17] and in patients with idiopathic pulmonary fibrosis (IPF) [17]. Here, CCR2 is linked to pulmonary fibrosis.