FAPi-PET Imaging of in Vivo Fibrosis in Inflammatory Bowel Disease Patients

Who May Qualify: Group 1 \- Adults ≥18 years with confirmed diagnosis of Crohn's disease AND one of the following: - Gastrointestinal complaints such as diarrhea, bloody and/ or lose stools and abdominal pain, or obstructive symptoms. - Increased CRP (\>5 mg/L) and/or fecal calprotectin levels (\>250 mg/kg) - Active disease confiremed by endoscopy ( endoscopic SES-CD score \>3) - Active disease confirmed by IUS or MRI (bowel wall thickening, signs of active disease) Group 2 - Adults ≥18 years with confirmed diagnosis of ulcerative colitis AND one of the following: - Active disease confirmed by endoscopy (endoscopic Mayo score ≥ 2) or - Active disease confirmed by intestinal ultrasound (BWT \> 3 mm in atleast one bowel segment and atleast one other pathological IUS parameter) - Increased CRP (\>5 mg/L) and/or fecal calprotectin levels (\>250 mg/kg) Who Should NOT Join This Trial: - Pregnancy - Unable to provide willing to sign a consent form - IBD-related surgeries \< 5 years in medical history - Colorectal carcinoma Always talk to your doctor about whether this trial is right for you.