1. INTRODUCTION
The new covid-19 coronavirus, a severe infectious disease with rapid transmission to humans, was discovered in December 2019, and its outbreak was declared by the World Health Organization as a public health emergency and has now claimed the lives of millions worldwide1. Diagnosis of Covid - 19 disease is performed using polymerase chain reaction tests, chest CT scans, and ELISA test kits2,3. Research published since 2019 claims that chest CT scans, along with polymerase chain reaction tests and other laboratory parameters, have the highest efficiency in detecting Covid 194,5. Therefore, chest CT scan and radiological reports have been proposed as an adjunct to polymerase chain reaction tests as a complementary method 6. No findings can completely confirmed or rule out the possibility of COVID-19 7. Some observational studies have been partially characterized Clinical, laboratory, and imaging features of Covid-19, but until now few systematic study on relate these features to each other have been published to date 8. Laboratory tests scales in the most patients with COVID-19 showed a significant changes in serum pro-inflammatory cytokine levels and blood biochemical markers such as interleukins, TNF-a, LDH, AST, ALT BUN, Creatinine, D-dimers, platelet count, cardiac troponin, renal markers WBC, HB and Lymphocytes (according to figure. 1) 9,10. Evaluation of clinical features and radiological reports in severe cases of COVID-19 will help in the initial prognosis, accurate diagnosis and treatment of patients with Covid-19 11-13. It was detecting that there are differences in the abundance of metabolic markers and biochemistry indicators in COVID-19 patients than healthy, but there is a question about the subject whether change in blood biochemistry markers are associated with CT-scan findings and the severity of COVID-19 disease? Most of the articles published in the field have reported the epidemiological and clinical characteristics of patients with COVID-19 disease, but data regarding the relationship of laboratory characteristics with CT-scan findings of infected individuals are limited 14-16. However, the evaluation of lungs involvement in CT scan and their relationship with laboratory indicator including biochemical and hematological factors, is the best scale for the severity and prognosis of Covid 19 patients 17. Various studies described the epidemiological and clinical characteristics of hospitalized patients 10,18-20. However, there is a limited number of detailed analysis on blood chemicals in discharged patients. In this study, we attempted that our findings could be usable to development future clinical research associated with COVID-19 infection. In concluded, this study aimed to evaluate laboratory parameters and the relationship them with CT scan reports and clinical outcomes in the diagnosis of patients with COVID-19.