The Value Of CT Empty Sign In The Diagnosis Of Pulmonary Diseases

ObjectiveThis study is based on the CT imaging features of pulmonary cavity in pulmonary infectious diseases, and to improve the early diagnosis and differential diagnosis of pulmonary bacteria, fungi and tuberculosis infection.MethodThe lung imaging examination from January 2014 to March 2016 in the First Affiliated Hospital of Guangzhou University of Chinese Medicine and General Hos of Guangzhou Military Regio were collected and analyzed,132 cases of cavity diseases were found. Analyzing the CT imaging features of the 132 patients by retrospective analysis method, through the patient’s age, gender and other basic information to the empty position, the number of lesions, empty form, empty wall thickness, cavity wall calcification, nodular, empty wall and the coarse of outer wall. Whether the cavity has liquid level or free nodules, and the study also involved in lesions with or without leaves and lobulation, and the pathological changes of lesion adjacent pleural the lung and mediastinal lymph node have increased. And the changes of empty position were observed together during therapy. SPSS22.0 statistical software was used for statistical analysis, two or more groups count data were compared with X2 test, and the age of each groups were compared with independent samples t test. It is considered significant differences when P<0.05.Result1. The incidence rate ratio of male/female on Pneumonia, pulmonary fungal, pulmonary tuberculosis and lung cancer cavity are 2.3,6.0,5.0 and 3.2. Bacterial pneumonia average age is the highest (60±18 years of age), cavity tuberculosis with an average age of the lowest (48±18 years of age), The incidence ages of Bacterial pneumonia and cavity tuberculosis has statistically significant, while the rest of pulmonary fungal disease and age of lung cancer with little significant.2. The single lesion is closely related to lung cancer cavity what multiple lesions are closely related to pulmonary fungal and pulmonary tuberculosis cavity. The result shows statistical significance with P<0.05.The local multiple prevalent in cavity pulmonary tuberculosis, bacterial empty is scattered in multiple.3. Lesions with an eccentric or irregular in shape without crossing the pulmonary lobe or segment. The wall thickness, smooth inner wall, wall fluid level and hole are closely related to the air pipe and bacterial lung infection diagnosis (P＜0.05).4. The lesions in the upper lung, hairy thorn or cord, wall calcification, satellite lesions all have practical values to the diagnosis of pulmonary tuberculosis (P＜0.05).5. Diffuse lesions of multiple, consolidation of background, inside the nodules or mycelim, burr connected with wall, the halo sign, mediastinal lymph node enlargement are closely related to pulmonary fungal infection (P<0.05).6. Cavity of lung metastases in more diffuse multiple, lower lung, the cavity present thick wall, shaggy outer wall, wall nodule, lymph node increases and pleural involvement are statistically significant (P＜0.05).7. Empty contents of mural nodules in mural nodule in lung cancer and pneumonia, pulmonary fungal and differential diagnosis of pulmonary tuberculosis in P values were＜0.05. was statistically significant; fluid level in pneumonia and pulmonary fungal, pulmonary tuberculosis, P in the diagnosis of lung cancer value＜0.05, was statistically significant; nodules /ball in pulmonary fungal infections and pneumonia, the differential diagnosis of pulmonary tuberculosis in P value＜0.05, was statistically significant; filaments with pulmonary fungal infections and pneumonia, lung cancer; differential diagnosis of pulmonary tuberculosis and lung cancer in P value< 0.05, was statistically significant.ConelusionsAccording to the pulmonary cavity CT imaging characteristics, such as the number of lesions, location, edge, contents, lesions of the peripheral lung tissue changes and lymph node enlargement and pleural involvement, it is beneficial to differentiate carcinoma of lung cavity and lung infection of pulmonary cavity, pulmonary tuberculosis cavity and non pulmonary tuberculous cavity, fungal pulmonary cavity lesions, pulmonary fungal and bacterial infections in the form of empty. It is of guiding significance for the differential diagnosis of bacterial pneumonia, pulmonary fungal disease, lung cancer and pulmonary tuberculosis. It is a guiding significance of clinical diagnosis and evaluation of curative effect. Different cavity pulmonary diseases would change in the course of treatment, therefore, the dynamic observation and case tracking is conducive to accurate diagnosis.