Related Experiment Video
Updated: Sep 20, 2026

Lung CT Segmentation to Identify Consolidations and Ground Glass Areas for Quantitative Assesment of SARS-CoV Pneumonia
Published on: December 19, 2020
[Roentgenography and CT appearance in patients with severe acute respiratory syndrome]
Qing-si Zeng1, Ling Chen, Wen-qing Hu
1Department of radiology, First Affiliated Hospital of Guangzhou Medical College, Guangzhou 510120, China.
Objective:
To evaluate the appearance and dynamic change of chest roentgenography and CT in patients with severe acute respiratory syndrome (SARS).
Methods:
Serial roentgenography and CT of 61 confirmed SARS patients were analyzed.
Results:
The onset symptom was fever in all patients. In the early phase of SARS, the main abnormal appearance was single or bilateral localized patchy clouding opacity on roentgenography, which progressed rapidly. The area of opacity peaked at about 2 weeks, involving the majority area of the lung in 57% of the patients. The area involved was correlated with the severity of clinical symptoms. The opacity disappeared gradually in 5 weeks in 84% of the patients. Lungs complicated infection were found in 6 patients with a prolonged duration of the illness. Among the 61 patients, 4 died. CT scan was performed in 16 SARS patients in the recovery phase, of whom 13 showed lung fibrosis.
Conclusions:
Lung infiltration in early phase develops rapidly and involves most area of the lung in advanced phase in most SARS patients. Lungs fibrosis was found in some patients in the recovery phase.
Related Concept Videos
Radiological Investigation I: X-ray and CT
Radiological Investigation II: MRI and Ventilation Perfusion Scan
Magnetic Resonance Imaging (MRI) and Ventilation Perfusion Scans are two radiological investigations that offer detailed diagnostic images of the body, particularly lung structures.
MRI
MRI uses magnetic fields and radiofrequency signals to distinguish between normal and abnormal tissues. This technology provides a more detailed diagnostic image than CT scans, enabling it to characterize pulmonary nodules, stage bronchogenic carcinoma, and evaluate inflammatory activity in...
Computed Tomography
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
Imaging Studies for Cardiovascular System V: CT
X-ray Imaging
Acute Respiratory Failure-IV

