Imaging (X-ray - CT - MRI - ultrasound).

Inflammatory bowel diseases (IBD) require evaluation diagnosis, disease course, location, activity and severity. Endoscopy is well established modality for IBD evaluation but sometimes it is invasive and has some risks. Radiological imaging techniques are less invasive and complementary to endoscopy. Computed tomography (CT) is an objective and universal imaging method, but there is a problem of radiation exposure. Magnetic resonance imaging (MRI) has similar diagnostic accuracy and indication to CT, but with the advantage of not imparting ionizing radiation. Ultrasound (US) is a well-tolerated and radiation-free imaging method, but has limitation of inter/intra observer variability. These imaging techniques have advantages and disadvantages, so cross-sectional imaging is needed.