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Fine needle aspiration (FNA) is a method of taking cytology sample by means of a fine needle attached with a syringe. Fine needle aspiration cytology (FNAC) is a diagnostic technique which involves study of the cell smears prepared from FNA material. [4][5][6] Ultrasound guided FNAC has been used as a diagnostic procedure of peripheral lung masses 7-9 but deep intrathoracic masses cannot be imaged by ultrasonography.CT guided biopsy was first reported in 1976 and since then numerous reports have shown CT guided transthoracic FNAC to be an accurate

Figure 3: CT scan showing multiple metastatic lesions in the obturator and gluteal musclesrecipient for tumors, which may be related to lactic acid metabolism. [5] These different factors that inhibit the growth of metastases in the skeletal muscle did not prevent the growth of metastases in our case.

Background: High resolution computed tomography scan can be used as a effective modality for corona virus disease 2019(COVID -19) being a useful alternative to RT-PCR specially in hospitalized and RT-PCR negative patients. Purpose: To evaluate the efficacy of high resolution CT scan in diagnosis and prognosis of COVID 19 and to see the sensitivity specificity, accuracy, positive and negative predictive value. We also aimed to compare HRCT findings with RT-PCR in COVID 19 patients to find out the severity, prognosis and staging of COVID-19 corona virus disease. Materials and Method: This cross sectional prospective observational study was carried out in department of Radiology and imaging, Dhaka Medical College Hospital Dhaka ,Bangladesh in collaboration with department of Virology and COVID unit, Dhaka Medical college Hospital , Bangladesh Observations and Results : Total 200 patients were evaluated with HRCT findings and correlated with RT-PCR as gold standard. . Sensitivity was about 96% for chest CT, specificity 66% , PPV 97% accuracy 90% and NPV 62%. Conclusion: HRCT scan of chest is a useful modality for COVID -19 patients for the purpose of diagnosis and response to treatment. It is an important indicator for future prognosis . HRCT can be an important alternative of RT-PCR in symptomatic patients when RT-PCR is negative where facilities are available . It is important for the radiologists and clinicians to be familiar with different manifestations on CT . It will help in management planning for these patients . J Dhaka Medical College, Vol. 29, No.2, October, 2020, Page 110-115