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Background: Due to the Covid 19 pandemic and the lack of useful information, in this study, we evaluated the hrct of patients with Covid 19Method: 92 patients confirmed by RT_PCR in Razi Hospital in Rasht were included in the study. In addition to their demographic and clinical information, their hrct findings were collected for evaluation. Among 92 patients (47 men, 45 women), the earliest symptoms included cough (81.5%), fever (67.4%), and muscle pain (58.7%) And Six patients required intubation and mechanical ventilation at some point during their hospital stay.Results: The most common hrct findings in our study were grade 4, peripheral lesion 87%, bilateral 95.7%, mixed 76.08%, ggos 75%, left lower lobe 94.56%. Among 92 patients, we had some inconsistent findings including two patients with cardiomegaly, three patients with pleural effusion, and bilateral pleural effusion in only one patient Conclusion: Compared to other studies, it can be concluded that peripheral, bilateral, mixed, ggos, left lower lobe involvement are important findings in most patients with covid 19. We suspect that the disease has more severe lung involvement in men and less involvement in women, which needs further investigation.

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Abstract Objective: Vitamin D plays a crucial role in calcium metabolism through the Parathyroid hormone (PTH) dependent process. The deficiency of this important nutrient may be associated with hypocalcemia after thyroidectomy. To evaluate the role of vitamin D in predicting hypocalcemia following total thyroidectomy.Results: sixty-two patients who underwent total thyroidectomy for benign or malignant thyroid disease were included in this prospective study. Preoperative vitamin D serum levels and PTH levels were determined. The results of our study showed In both groups with and without vitamin D deficiency, calcium levels decreased significantly (P = 0.01). In our study, it was found that there was no significant relationship between postoperative hypocalcemia and vitamin D deficiency. (P = 0.441). After reviewing the data and according to Spearman correlation statistical test, no significant relationship was observed between serum PTH and calcium after thyroidectomy (P = 0.340).Vitamin D deficiency is a risk factor of hypocalcemia after total thyroidectomy for benign goiter. Although post thyroidectomy hypocalcemia is multifactorial, vitamin D deficiency, particularly severe form, is significantly associated with the development of biochemical and clinical hypocalcemia vitamin D supplementation can prevent this unwanted complication in such patients.