Acute Peric C-Constr Peric Echo fluid p Normal, rarely calcification Chest X-ray Enlarged shadow Normal Bottle-like Small and straight Calcification cT or MRI Fluid Pericardium thickening Etiology diagnosisAcute Peric C-Constr Peric Echo fluid Normal, rarely calcification Chest X-ray Enlarged shadow Bottle-like Normal, Small and straight, Calcification CT or MRI Fluid Pericardium thickening Etiology diagnosis