Value of CT application in the screening,diagnosis,and treatment of COVID-19. / CT检查在2019å† çŠ¶ç— æ¯’ç— ç­›æŸ¥ã€è¯Šæ–­åŠæ²»ç–—ä¸­çš„åº”ç”¨ä»·å€¼.

The coronavirus disease 2019 (COVID-19) has attracted extensive attention all around the world recently. Early screening, early diagnosis, early isolation, and early treatment remain the most effective prevention and control measures. Computed tomography (CT) plays a vital role in the screening, diagnosis, treatment, and follow-up of COVID-19, especially in the early screening, with a higher sensitivity than that of real-time fluorescence RT-PCR. The combination of CT and artificial intelligence has the potential to help clinicians in improving the diagnostic accuracy and working efficiency.

Clinical and CT imaging features between the first nucleic acid-negative and first nucleic acid-positive COVID-19 patients. / 2019å† çŠ¶ç— æ¯’ç— é¦–æ¬¡æ ¸é ¸é˜´æ€§ä¸Žé¦–æ¬¡æ ¸é ¸é˜³æ€§æ‚£è€ ä¸´åºŠåŠCT影像学表现.

OBJECTIVES: To investigate the role of chest CT for the diagnostic work-up for patients with suspected infection of coronavirus disease 2019 (COVID-19). METHODS: The clinical data and imaging findings of the first nucleic acid-negative COVID-19 patients were analyzed and compared with the first nucleic acid-positive patients. RESULTS: Compared with the first nucleic acid-positive patients, the onset time of the first nucleic acid-negative patients was shorter [(3.58±2.94) d], but the diagnosis was longer [(3.92±3.66) d]. There were no significant differences in the characteristics of the clinical data and radiological findings between the 2 groups (P>0.05). CONCLUSION: Chest CT examination is important to avoid COVID-19 missed diagnosis due to false negative nucleic acid.

Imaging examination, diagnosis, and control and prevention of nosocomial infection for coronavirus disease 2019: Expert consensus of Hunan radiologist. / æ–°åž‹å† çŠ¶ç— æ¯’è‚ºç‚Žå½±åƒå­¦æ£€æŸ¥ã€ è¯Šæ–­åŠåŒ»é™¢å† æ„ŸæŸ“é¢„é˜²ä¸ŽæŽ§åˆ¶ï¼šæ¹–å—çœæ”¾å°„å­¦ä¸“å®¶å ±.

The outbreak of coronavirus disease 2019 (COVID-19) is a huge threat to global public health because it develops rapidly. There is no specific treatment so far. Chest imaging examination is an important auxiliary examination method in diagnosis of COVID-19. To further standardize the imaging examination and diagnosis of COVID-19, Hunan Society of Radiology together with Imaging Technology Professional Committee of Hunan Medical Association reach an expert consensus document on imaging examination, diagnosis, and control and prevention of nosocomial infection for COVID-19. This document summarizes the epidemiological characteristics, clinical features, imaging examination procedure, imaging findings, CT staging, the value of imaging examination, and the methods for control and prevention of nosocomial infection for COVID-19 during imaging examination. Furthermore, it extends the clinical characteristics and imaging manifestations of COVID-19 in children.

Design, validation, and clinical practice of standardized imaging diagnostic report for COVID-19. / COVID-19规范化影像学诊断报告的设计、验证与临床实践.

OBJECTIVES: To design a standardized imaging diagnostic reporting mode for screening coronavirus disease 2019 (COVID-19), and to prospectively verify its effectiveness in clinical practice. METHODS: A new classification and standardized imaging diagnosis report mode of viral pneumonia was established by studying and summarizing the imaging findings of various kinds of viral pneumonia, combining with lesion density, interstitial changes, pleural effusion, lymph nodes, and some special signs. After systematic training, the radiologist experienced clinical practice for screening CT features. COVID-19 cases were screened retrospectively in the single-center. The confirmed cases were verified, and the diagnostic efficacy of the standardized imaging reporting system in screening COVID-19 was tested. RESULTS: There were 912 patients in this stage receiving the screening imaging examination. Of them, 190 patients were screened in the report mode and 30 patients were diagnosed as COVID-19. The CT manifestation of COVID-19 was characterized by pure ground glass lesions or with a few solid components, predominant subpleural distribution, no lymph node enlargement and pleural effusion, and often with paving-way sign and air bronchus sign. In combination with the above signs, the diagnostic efficacy of COVID-19 was 0.942. CONCLUSIONS: The standardized imaging diagnosis report mode based on COVID-19 chest image features is effective and practical, which should be popularized.