 Good morning. Hello everyone. My name is Oknaavish Sharma. I'm here to present my CT findings in COVID positive patients. Ames is too typical and to estimate the typical and atypical chest CT findings in COVID-19, RTPCR, positive patients with better assessment. Introduction, novel human coronavirus disease was first reported in Wuhan, China in December 2019 and it spread throughout the world and was declared pandemic by the World Health Organization on March 12, 2020. It is an infection. This is just caused by the severe acute respiratory coronavirus 2 and it effect both upper and the lower respiratory tract infection and clinically present in many class test pneumonia with pre-dominant imaging finding of atypical or organized pneumonia. The choice of imaging technique in COVID-19 is still the matter of the debate. Chest x-ray are the screening modality not only give a faster result but bedside chest x-ray also reduce the COVID-19 exposure to the other patients. But chest x-ray also has its limitation as normal chest x-ray does not rule out any COVID pneumonia. So better is CT, CT with the correct score, it will better delineate the COVID positive patient as compared to the chest x-ray. Chest x-ray is only a screening modality in initial number of days and best modality is the RTPCR but RTPCR is not used worldwide because of its lack of availability and long hour of diagnosis. Material and method. This is a prospective study which is done in Mazafanagan Medical College and Hospital. A total of 100 patients were included and all the patients underwent non-contrast chest CT in radiology department using CMN16 channel score. A volumetric chest CT was assigned at a long window 1500 window width and 500 window length and BDSNL window using 2D coronal and societal plane for better assessment of the extent of the disease. All the imaging findings were analyzed independently by the two radiologists with experience of 10 and 6A respectively. There are different findings like grand blast opacity, reticulation, crazy paving pattern which we will talk later on. And this is a CT CT score which is calculated based on the extent of the lower involvement and each of the 5 lobes were visually scored on the scale of 0 to 5. 0 no involvement, 1-5%, 2-5 to 25%, 3-26 to 49%, 4-52 to 75% and 5 more than 75% involvement is there. Total score is range from 0 to 25, 0 there is no involvement and 25 maximum involvement is there. These are my results and this table will show the age and sex by distribution of the patient which we will include in our study and most of the patient is ranging from 22 to 86 years and mean age is about 50 years. And these are the features out of 100 patients, 96 patients show abnormality and these are the abnormality which are given like grand blast opacity which is the most common abnormality which is seen followed by consolidation, reticulation, crazy paving pattern and so on. And the mean total length 30 score for 100 patient was 14 and the mean length 30 score for all the lobes that include are given in this table which is provided. These are my results which are described in all the 3 tables, 1st, 2nd and 3rd. Now, GGO was seen in 93% of the patient, most of the GGOs they are periphery less commonly they are central and sometime they are neither predominant nor central and non-peripheral. 91% patients show bilateral involvement, 2% show only unilateral involvement in these cases. Like in this test CT axial cut we will see the peripheral predominant GGOs, we can see in both. And in this CT axial cut we will see there is neither peripheral or central GGOs are there and on 2nd figure we can also see the bronchitis changes along with it. And in this axial cut we can see multifocal patches of ground glass opacity as shown by the arrow and sub plural curvilinear lines which are shown by the arrowhead. And this is a coronal or axial unenhanced CT image which will show the diffuse ground glass opacity of both the lines. CT, CT score of 24 to out of 25. Consolidation are the 2nd most common finding which will find which is bilateral and most commonly lower low predominance. Like in this unenhanced CT image show a wide area of ground glass appearance shown by the arrowhead and consolidation which is shown by the red arrow involving bilateral mainly lower lows and peripheral predominance. And with the blue arrow we can see the vascular enlargement also. And now discussion, RT-PCR is the bold standard test for diagnosis COVID-19 however due to its limited availability and delay in reporting in patient load scenario the usefulness of the other modality was sorted. In the study we valued chest CT finding the COVID-19 RT-PCR positive patient the chest CT was normal in 4 out of 100 patients. At AI et al also reported 21 out of 600 patients RT-PCR with clinical symptoms have normal CT scan. The most common finding is the GGO as described previously and according to the study bio et al conduct out of GGO is the most common finding in present 83% of the COVID-19 cases. And another meta analysis by Ziu et al involving 4-1-2-1 patients showing that GGO was the most common finding in present 68% of the COVID-19 patient. Mostly GGO is bilateral peripheral patch involvement of the lung like in this axial CT which will show bilateral lung gas opacity with peripheral freedom. Second finding is reticulation which is seen in 71% patient in our patient. It is probably by the lymphocytic infiltration of the interstitial tissue with interlobular and septal. Crazy paving pattern it is seen in 59 patients in our study and it is GGO with thickened interlobar or interlobar septal which is superimposed over the GGOs. Like in this axial and anion CT which will show a reticulation bilateral with crazy paving pattern. And also in this axial and anion CT show ground glass opacity with superimposed septal thickening giving the crazy paving pattern as shown by the efforts. Other finding is consolidation. Mostly consolidation are bilateral with lower low predominance. And the finding are similar with the previous study which will show bilateral pattern of the ground glass and consolidation also. Other finding is the sub-pural curvilinear lines which appear as linear shadow 1-3 mm in thickness parallel to a line within 1 cm of the pural surfaces. Like in this axial and anion CT show area of consolidation shown by the red arrow involving the bilateral mainly lower low and posterior peripheral predominance. And in this anion CT shows sub-pural curvilinear lines and the area of the ground glass opacity as shown by the arrow head. Other findings like bronchic test is sub-pural intraspirant line and vascular enlargement can also be seen in our patient. Like in this anion anion axial CT we can see the bronchic tactic changes in first image. And in second image we can see thin sub-pural transplant line between the areas of the GGOs and the visceral pleural consistent with the sub-pural transplant lines as shown by the arrow head. And in this we can see the vascular enlargement which is shown by the arrow head. This finding in an anion and anion CT show a ground glass opacity which is surrounded by the consolidation both upper and lower low and finding which is consistent with the reverse halo sign. Conclusion, chest CT scan is sensitive tool for diagnosing COVID-19. It also helping better assessment of the severity of the COVID patient. And the GGOs reticulation these are all the findings which we can early find on the CT as compared to that of the chest X. So chest CT scan may act as a quick diagnostic tool with a high sensitivity taking into consideration that all most all COVID-19 patients demonstrate the technical features. Thank you. These all are my references.