 Good morning everyone, myself Dr. Vasan Kumar El from Miso Medical College and Research Institute. Today I'm going to present my paper on evaluation of interstitial lung disease by high resolution computed tomography of chest. Coming on to introduction, interstitial lung disease or heterogeneous group of disorder characterized by bilateral often patchy pulmonary fibrosis. Many are fitting the wall of angioling with diffuse abnormality on lung radiograph. Now on HS sitting of the thorax, it is one of the standard diagnostics test for IRD, which is used to see the fine details of interstitiation, which may or may not be visible on chest radiograph. And it has seen coming onto the specific diagnosis so that further testing of which are in Miso, like bronchoscopy or surgical and biopsy is not required. So the coming onto the objectives. The main objectives is to evaluate the interstitial lung disease in symptomatic patient with normal or equivocal chest radiograph to accurately assess a pattern of distribution and severity of the disease process for the purpose of treatment and management. Coming on to the etiology. It can be because of drug induce like antibiotic or anti-arithemic drug can be because of connectivity disorder like slero derma, HCL, rheumatoid arthritis. Can also be because of certain inherent agent can be organic or inorganic like silica asbestos form antigens. Other conditions like infectious malignant condition like ground call work or cinema can also cause this condition coming onto materials and method. All the patient with clinical suspicions of industry or lung disease will have been referred to our department web is subjected to HR city. It was in hospital based cross section study conducted for a period of 18 months. So coming onto free of the representative cases. The first case is an unusual interstitial pneumonia. The classical anxiety findings in usual interstitial pneumonia are. Presence of reticular opacity with any coming and with or without action bronchitis. All this should be sub plural and base of predominance. This is a case of usual interstitial pneumonia. We can see the presence of any coming with the extreme. So reticular opacity, which is sub plural and base of predominance, which usually present in the second case is an acute interstitial pneumonia. In acute interstitial pneumonia. It is a firm and form usually causes like diffuse early on damage, usually in a previous healthy individual. The classical anxiety findings will be patchy bilateral groundless opacity with consolidation, which is predominant in the posterior segments of the lung. They can be architecture distortion traction bronchitis or any coming as a disease progresses. The first set of image is a case of AIP. We can see patchy groundless opacity with interlover septal technique involving volatile lung lobes with traction bronchitis. The next is a respiratory bronchitis associated interstitial lung disease. This disease is mainly associated with smokers and it is categorized by macrophage accumulation within the bronchal and alveolar wall. On HRCT, we can see groundless opacity, centelopolar nodules. In one case, we can also see fibiotic changes. Other changes related to smoking such as bronchal water cling and centelopolar nodules can be seen. In the second set of image, we can see the presence of diffuse groundless opacity with patchy areas of air trapping and diffuse emphysematized changes with media-stainless lymphenopathy. This is a case of respiratory bronchitis into ILD. Next is a non-specific interstitial lung disease. Here, the HRCT will have various combinations of groundless opacity, consolidation, reticular opacity, traction bronchitis, etc. Any coming may be present but it is very safe. One of the classical features is the purest pairing of changes within the lung parankima. The first set of image is an NSIP. This is a condition of NSIP. We can see interlover septal technique with groundless opacity and sublural pairing involving bilateral lower lung groups. Next is lymphog interstitial pneumonia. Here, there will be diffuse D-cell infiltration. On HRCT, we can see thickening of bronchal vascular pandas along with interstitial thickening, pulmonary nodules. We can see thin walled cyst with groundless opacity. In this second set of image, which is lymphoid interstitial pneumonia, we can see numerous thin walled, wide-defined cysts which are randomly distributed. And also, there is presence of groundless opacity with nodules. So, coming on to results and interpretation, we included about 50 patients in our study. And age group ranges from 60 to 69 years. Majority of the patients were housewife and farmer by occupation. There were 36% were smoker. There were 10% were exposed to grain test and bird and animal droppings. In HRCT, we can see features like interlover septal thickening, reticulation, phytotic changes, traction bronchitis, honey combing, and groundless opacity. So, on coming on to discussion, interstitial lung disease, diverse group of parankamal lung disease, having varying significantly in etiology, pathogenesis, and histopathology. HRCT remains a standard for precise diagnostic in symptomatic patient, particularly if the clinical diagnosis remains unclear. In the present study, the patient mostly included between 60 to 69 years with the female predominance, and there was significant history of smoking. So, the form and diagnostic diagnosis in our study was user interstitial pneumonia and SIP acute interstitial pneumonia, lymphoid interstitial pneumonia, and respiratory bronchitis. To find the observation in our study was incompatible with other study like studies done by Patel BB et al, Mohammed SK et al. And all these studies, the user interstitial pneumonia was the most common followed by NSIP and AIP. ILD is a disease of middle age group with a pre-female predominance. HRCT is a preferred technique to study the lung parankamal, which precisely demonstrated the pattern distribution and extent of the ILD. HRCT reduces the need for conformative lung biopsy, even though when HRCT findings are equivocal, it can guide for accurate lung biopsy sites so complication can be prevented. Thank you. This is all my references. Thank you.