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  An Expert Review for Medical Imaging Professionals, Clinicians, and Healthcare AI Researchers Keywords: Pylephlebitis, Portal Vein Thrombosis, Diverticulitis, CT Imaging, Portal Venous Gas, Mesenteric Venous Gas, Abdominal CT, Emergency Radiology, Diagnostic Imaging, Liver Infection, Sepsis, Healthcare AI, Medical Imaging, Clinical Decision Support, Artificial Intelligence in Radiology Introduction Among the infectious complications encountered in abdominal imaging, pylephlebitis remains one of the most challenging diagnoses because of its rarity, nonspecific clinical manifestations, and potentially devastating consequences. Although modern multidetector CT (MDCT) has dramatically improved diagnostic accuracy, delayed diagnosis continues to contribute to significant morbidity and mortality. Pylephlebitis, also known as suppurative thrombophlebitis of the portal venous system , represents septic thrombosis involving the portal vein and/or its tributaries. The disease typically d...

 Gastric Emphysema vs Emphysematous Gastritis: A Comprehensive Radiologic Review 위 기종 대 기종성 위염: 종합적 방사선학적 고찰 Keywords : gastric emphysema, emphysematous gastritis, pneumatosis gastica, CT imaging, gastric pneumatosis, portal venous gas, benign gastric pneumatosis, gastric wall gas Abstract Gastric pneumatosis, encompassing both gastric emphysema (GE) and emphysematous gastritis (EG), is an imaging spectrum ranging from benign to life‑threatening. This article provides a detailed review based on the clinical and radiologic features outlined in the URL “learningradiology.com/…/gastricemphysemapage.htm”. Emphasis is placed on CT imaging characteristics, pathophysiology, differential diagnosis, and management. High‑resolution axial and multiplanar CT images (Figures 1–4) illustrate findings. Three interactive quiz items reinforce core learning. The article concludes with evidence‑based guidance and an IEEE‑formatted reference list. 1. Introduction Gastric pneumatosis refers...