Lungs Filled With Ground Glass-like Density Of Msct Value

Objective To study the CT features of pulmonary diseases with diffuse ground-glass opacity (DGGO), and to improve diagnostic and differential diagnostic accuracy of theses diseases. To study the value of DGGO in MSCT to evaluate the activity of different lung lesions. Methods The clinical and MSCT materials of 158 cases'DGGO which were proved by pathology or clinical comprehensive diagnosis were retrospectively analyzed. The CT features of DGGO, including its morphology, distribution, concomitant signs and dynamic changes, were summarized. Results 1. Imaging findings of different pulmonary DGGOs:①Pneumocystis carinii pneumonia: The DGGO had mainly distributed throughout the lung field, mainly with lamellar and map-like shape. Among them, most had associated with multi-focal consolidation shadows,40% of patients with pulmonary gas cysts, a few with centrilobular nodules, grid shadow and traction bronchiectasis.②Exogenous allergic pneumonia:The DGGO had mainly distributed throughout the lung field, mainly with lamellar and map-like shape. Among them, most had mainly associated with air trapping and ill-defined centrilobular nodules, a few with focal consolidation shadows and grid shadow.③Idiopathic interstitial pneumonias and pulmonary collagen vascular diseases:The DGGO had mainly distributed in the peripheral lung field, with patchy, lamellar and map-like shape. Among them, most had mainly associated with grid shadow and traction bronchiectasis, a few with focal consolidation shadows and centrilobular nodules.④H1N1:The DGGO had mainly distributed in the peripheral lung field and around the bronchovascular bundles, with patchy, lamellar and map-like shape. Among them, most had mainly associated with patchy consolidation shadows.⑤Diffuse alveolar hemorrhage:The distribution of the DGGO had no feature. Among them, most had mainly associated with patchy consolidation shadows, a few with centrilobular nodules and crazy-paving sign.⑥Pulmonary edema:The DGGO had mainly distributed in the central lung field, with patchy and aliform shape. Among them, most had mainly associated with patchy consolidation shadows, a few with centrilobular nodules and crazy-paving sign.⑦Pulmonary alveolar proteinosis: The DGGO had mainly randomly distributed, mainly with map-like shape. Among them, most had mainly associated with crazy-paving sign, a few with patchy consolidation shadows.2. Most of the lungs DGGO after reasonable treatment lessened or disappeared. Some without proper treatment progressed with consolidation. Some the chronic interstitial fibrosis progressed with DGGO expansion and fibrosis. Conclusion DGGO may be seen in various diseases. To analyze the morphology, distribution, concomitant signs and dynamic changes of DGGO can preliminarily comprehend its pathological basis and pathogenic mechanism. In combination with clinical materials, the range of diagnostic possibilities can be shrinked. DGGO in MSCT is important to evaluate disease reactiveness.