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Background The Radiological Society of North America (RSNA) recently published a chest CT classification system and Dutch Association for Radiology has announced Coronavirus disease 2019 (COVID-19) reporting and data system (CO-RADS) to provide guidelines to radiologists who interpret chest CT images of patients with suspected COVID-19 pneumonia. This study aimed to compare CO-RADS and RSNA classification with respect to their sensitivity and reliability for diagnosis of COVID-19 pneumonia. Results A retrospective study assessed consecutive CT chest imaging of 359 COVID-19-positive patients. Three experienced radiologists who were aware of the final diagnosis of all patients, independently categorized each patient according to CO-RADS and RSNA classification. RT-PCR test performed within one week of chest CT scan was used as a reference standard for calculating sensitivity of each system. Kappa statistics and intraclass correlation coefficient were used to assess reliability of each system. The study group included 359 patients (180 men, 179 women; mean age, 45 ± 16.9 years). Considering combination of CO-RADS 3, 4 and 5 and combination of typical and indeterminate RSNA categories as positive predictors for COVID-19 diagnosis, the overall sensitivity was the same for both classification systems (72.7%). Applying both systems in moderate and severe/critically ill patients resulted in a significant increase in sensitivity (94.7% and 97.8%, respectively). The overall inter-reviewer agreement was excellent for CO-RADS (κ = 0.801), and good for RSNA classification (κ = 0.781). Conclusion CO-RADS and RSNA chest CT classification systems are comparable in diagnosis of COVID-19 pneumonia with similar sensitivity and reliability.

COVID-19 is a newly discovered deadly disease with no proven definitive treatment until now. It is now proved that it can affect different body organs which necessitate intensive care management. Ozone (O3) therapy was used before for treating various viral infections like hepatitis B, human immune deficiency virus (HIV), and Ebola viruses. O3 also can manage hypoxia and increase tissue oxygenation, besides its anti-inflammatory and immunomodulatory properties which may have an important role in the management of cytokine storm. We used rectal O3 insufflation therapy assuming that it may have a beneficial role in the management of COVID-19 disease. Two sessions of rectal O3 therapy were given to a 60-year-old female patient who was confirmed COVID-19 positive. Before applying O3 therapy, she was hypoxic (sPO2:90%) despite mechanical ventilation with high fraction inspired oxygen (FiO2:90%). After therapy, she was markedly improved and discharged to the inpatient ward and then discharged home on day 10 post-admission. Another 40-year-old male patient who was confirmed COVID-19 positive and was home isolated received one session of O3 therapy. Before therapy, he was hypoxic (sPO2:85% on room air and 95% with O2 face mask 5 L/min). The patient showed gradual improvement over the next 3 days after therapy and becomes oxygen-independent (sPO2 became 94–97% on room air). No adverse effects were noticed in both cases. Rectal O3 insufflation can be used safely as adjuvant management for patients with COVID-19 disease.

Background: The diagnosis of sonographically indeterminate adnexal masses (AM) signifies a major challenge in clinical practice. Early detection and characterization have increased the need for accurate imaging evaluation before treatment. Purpose: To assess the validity and reproducibility of the ADNEX MR Scoring system in the diagnosis of sonographically indeterminate AM. Study Type: A prospective multicenter study. Population: In all, 531 women (mean age, 44 AE 11.2 years; range, 21-79 years) with 572 sonographically indeterminate AM. Field Strength/Sequence: 1.5T/precontrast T 1-weighted imaging (WI) fast spin echo (FSE) (in-phase and out-of-phase, with and without fat suppression); T 2-WI FSE; diffusion-WI single-shot echo planner with b-values of 0 and 1000 s/mm 2 ; and dynamic contrast-enhanced perfusion T 1-WI liver acquisition with volume acceleration (LAVA). Assessment: All MRI examinations were evaluated by three radiologists, and the AM were categorized into five scores based on the ADNEX MR Scoring system. Score 1: no AM; 2: benign AM; 3: probably benign AM; 4: indeterminate AM; 5: probably malignant AM. Histopathology and imaging follow-up were used as the standard references for evaluating the validity of the ADNEX MR Scoring system for detecting ovarian malignancy. Statistical Tests: Four-fold table test, kappa statistics (κ), and receiver operating characteristic (ROC) curve. Results: In all, 136 (23.8%) AM were malignant, and 436 (76.2%) were benign. Of the 350 AM classified as score 2, one (0.3%) was malignant; of the 62 AM classified as score 3, six (9.7%) were malignant; of the 73 AM classified as score 4, 43 (58.9%) were malignant; and of the 87 AM categorized as score 5, 86 (98.9%) were malignant. The best cutoff value for predicting malignant AM was score >3 with sensitivity and specificity of 92.9% and 94.9%, respectively. The interreader agreement of the ADNEX MR Scoring was very good (κ = 0.861).

Background Since the announcement of COVID-19 as a pandemic infection, several studies have been performed to discuss the clinical picture, laboratory finding, and imaging features of this disease. The aim of this study is to demarcate the imaging features of novel coronavirus infected pneumonia (NCIP) in different age groups and outline the relation between radiological aspect, including CT severity, and clinical aspect, including age, oxygen saturation, and fatal outcome. We implemented a prospective observational study enrolled 299 laboratory-confirmed COVID-19 patients (169 males and 130 females; age range = 2–91 years; mean age = 38.4 ± 17.2). All patients were submitted to chest CT with multi-planar reconstruction. The imaging features of NCIP in different age groups were described. The relations between CT severity and age, oxygen saturation, and fatal outcome were evaluated. Results The most predominant CT features were bilateral (75.4%), posterior (66.3%), pleural-based (93.5%), lower lobe involvement (89.8%), and ground-glass opacity (94.7%). ROC curve analysis revealed that the optimal cutoff age that was highly exposed to moderate and severe stages of NCIP was 38 years old (AUC = 0.77, p < 0.001). NCIP was noted in 42.6% below 40-year-old age group compared to 84% above 40-year-old age group. The CT severity was significantly related to age and fatal outcome (p < 0.001). Anterior, centrilobular, hilar, apical, and middle lobe involvements had a significant relation to below 90% oxygen saturation. A significant negative correlation was found between CT severity and oxygen saturation (r = − 0.49, p < 0.001). Crazy-paving pattern, anterior aspect, hilar, centrilobular involvement, and moderate and severe stages had a statistically significant relation to higher mortality. Conclusion The current study confirmed the value of CT as a prognostic predictor in NCIP through demonstration of the strong relation between CT severity and age, oxygen saturation, and the fatal outcome. In the era of COVID-19 pandemic, this study is considered to be an extension to other studies discussing chest CT features of COVID-19 in different age groups with demarcation of the relation of chest CT severity to different pattern and distribution of NCIP, age, oxygen saturation, and mortality rate.