Diagnostic approach of alimentary tract perforation -- Plain film signs of pneumoperitoneum -- Ultrasonographic assessment of gastrointestinal perforation -- Esophageal perforation: assessment with Multidetector row Computed Tomography -- Role of Multidetector row Computed Tomography in the diagnosis of gastro-duodenal perforation -- Small bowel perforation: imaging findings -- Acute perforated appendicitis: spectrum of MDCT findings -- Acute perforated diverticulitis: spectrum of MDCT findings -- Colorectal perforation: assessment with MDCT -- MDCT imaging of blunt traumatic bowel and colonic perforation -- MDCT imaging of gastrointestinal tract perforation due to foreign body ingestion -- Pneumoretroperitoneum: imaging findings -- Imaging of gastrointestinal tract perforation in the pediatric patient -- Imaging of gastrointestinal tract perforation in the elderly patient -- Imaging of gastrointestinal tract perforation in the oncologic patient -- Role of Multidetector row Computed Tomography in the diagnosis of acute peritonitis due to gastrointestinal perforation -- Abdominal compartment syndrome and gastrointestinal tract perforation.