Organs respond to injuries with the formation of new fibrous tissue, which can result in scarring. This process called fibrogenesis can now be monitored noninvasively on a molecular level, as American scientists report in the journal Angewandte Chemie. They have created a new gadolinium-based probe for magnetic resonance imaging that specifically reports the proteins involved in fibrogenesis. The imaging method may provide a quantitative assessment of the formation of the potentially harmful scar tissue.