RecruitingCombination product18F-Fibroblast Activation Protein Inhibitor (18F-FAPI-74) in Tuberculosis PatientsThe investigators will assess the hypothesis is that 18F-Fibroblast Activation Protein Inhibitor (18F-FAPI-74) Positron emission tomography (PET) could be used as a noninvasive biomarker to assess post-tuberculosis (post-TB) lung disease and fibrosis in TB patients. Microbiologically confirmed patients with active tuberculosis will be invited to participate in the study. A whole-body PET scan will be performed after 18F-FAPI-74 intravenous injection and correlation will be made with sites of TB lesions noted on CT. It is anticipated that 18F-FAPI-74 PET will be able to detect fibrosis (with high sensitivity) in the TB lesions.