Inclusion Criteria:  Age >= 18 years.  Confirmed pathologic fibrosis in one of the following cohorts  Cohort 1: Hepatic fibrosis, based on cirrhosis on imaging or hepatic fibrosis on liver biopsy. Cohort 2: Pulmonary fibrosis, based on CT findings or biopsy of lung parenchyma. Cohort 3: High likelihood of cardiac fibrosis as indicated by known cardiac sarcoidosis or amyloidosis (shown on MRI or Fluorodeoxyglucose (FDG) PET), recent myocardial infarction within the last 30 days (as shown by an elevated troponin), known cardiotoxicity (decreased ejection fraction on systemic therapy), or other known inflammatory or infiltrative disease. Ability to understand a written informed consent document, and the willingness to sign it.  Exclusion Criteria:  Unlikely to comply with protocol procedures, restrictions and requirements and judged by the Investigator to be unsuitable for participation. Known pregnancy.