 Good evening everyone. Myself Dr. Manzil, PG resident in the Department of Radio Diagnosis, MJ Medical College in Dore, is going to present a paper on CT and MR imaging of the pericardium. The images A, CT and B and C MRI show the normal pericardium, the thickness of the pericardium is readily measured with the upper limit of normal being 2 mm. The cardiac MRI shows the pericardium as thin, smooth, low-intensity curvilinear structure. Congenital pericardial diseases, first is pericardial cyst, it's benign and encapsulated fluid-filled structure with no internal septations or nodules as shown in the image is the normal pericardial cyst. Second is the pericardial defect, vascular degeneration during embryogenesis, excessive ego rotation of heart, interposition of lungs shown by arrows and there can be herniation of heart chambers such as left atrial appendage. The figures are showing the CT images of an adult and child respectively with pericardial defect. Pericardial effusion, it's the collection in the pericardial space, the imaging goals are to see the size of the collection, location, equity, composition that is simple or complex collection, etiology, impaired remodeling and hemodynamic significance. Figure 1 shows simple pericardial effusion and figure 2 shows separated pericardial collection. Next is cardiac temponade, it's a life-threatening condition, pericardial accumulation of fluid, blood or pus, past accumulation of a relatively limited amount of fluid causes compromise of diastolic filling and reduction of cardiac output. The ECG-cated CT images in a 49-year-old man shows a pseudo-aneurism as depicted by yellow arrow from RC's tent causing local temponade depicted by green arrow. The temponade causing RB compression is shown in the other image. Pericarditis, it's the inflammation of pericardium, can be acute, subacute, recurrent or chronic causes can be viral, TB, neoplas and systemic that are autoimmune diseases. Remember CT cannot differentiate between small effusion and thickening. The following images show thickened and diffusely enhancing pericardial layers with some effusion and MR images shows thickened pericardium. On spin echo images and post-cadolinium image, a short axis view show pericardial enhancement. Constrictive pericarditis, image A shows constrictive cardiac cavities that are flattened or tubular shaped ventricles, unilateral or bilateral atrial enlargement. On sine imaging, this resembles a rocking motion of septum also known as septal bounds. Images B and C show end stage of chronic fibrosin form of constrictive pericarditis with no enhancement or thickening. Constrictive pericarditis, pericardial motion. The sine-tagged imaging, a transient fiducial linear orthogonal grid pattern is generated by the pulse sequence referred to as taglines. In normal pericardium, the tagline rapidly becomes discontinuous during the cardiac cycle due to sheer motion of the inner and outer pericardial layer. Persistence of these taglines can be because of fibrotic fusion. Chronic calcific pericarditis, the figure one shows the CT images with pericardial calcification and spur invading into the myometrium as shown in images A and B. The C and D images with 3D reconstruction show extensive pericardial calcifications. Figure two shows ECG-cated CT images showing tubular ventricles with calcification in AV groove dilated IVC with reflux of contrast in case of calcific constrictive pericarditis. Pericardial masses, first metastasis. The common meds are from breast carcinoma, lung carcinoma, lymphoma and melanoma. Metastasis to pericardium is shown by the yellow arrows and to the myocardium is shown by the green arrows in the images. Primary malignancy, most common is mesothelioma, mass involving the pericardium and completely encasing the heart. Pseudomas, the T2, T1 and gadolinium enhanced images in a 74 year old male with remote history of trauma are shown. The lesion was diagnosed to be organized hematoma. Thank you.