The analysis of results of low-dose chest CT of coal miners with over 20-year exposure / 实用放射学杂志

Objective To evaluate the application value of low-dose CT (LDCT) in physical examination for coal miners with different exposure time.Methods The consecutive three-year imaging data of 972 coal miners with over 20-year exposure were retrospectively reviewed.All miners were divided into 3 groups according to different exposure time,including 317 cases with less than 10 years,299 cases with 10-20 years and 356 cases with more than 20 years.All subjects underwent LDCT examination every year during three consecutive years.Results Baseline LDCT:As the exposure time was prolonged (with less than 10 years,10-20 years and more than 20 years),the number of coal miners has increased with non-calcified pulmonary nodules,interstitial pulmonary lesions,clinically cured or stable stage of pulmonary tuberculosis,pulmonary calcification and pulmonary fibrous stripes,but without statistically significant difference.The detection rates of lung bullae,aorta and coronary artery sclerosis were also increased mildly,with the prolonged exposure time.There was no significant correlation between exposure time and detection rates of bronchiectasis,pulmonary inflammatory lesions,lymph node enlargement or calcification,pleural lesions.The exposure time of 6 cases of malignant nodules and 2 cases of active tuberculosis was more than 10 years.During a two-year follow-up using LDCT scan,there were no significant changes in most of intrapulmonary,pleural and mediastinal lesions.Neither were in pulmonary nodules less than or equal to 4 mm.Three pulmonary nodules with 4-8 mm diameters were enlarged.Most of the inflammatory lesions have changed in size.Conclusion The LDCT scan has a certain value for chest physical examination of the coal miners with different exposure time.It is very necessary to screen the high-risk population of coal miners with exposure time of more than 10 years using LDCT.LDCT reexamination has significant value for pulmonary nodules and inflammatory lesions with diameter of more than 4 mm.Most of intrapulmonary,pleural and mediastinal lesions have no obvious change in the short term,and make an annual reexamination unnecessary,neither does a negative baseline LDCT.

Clinical significance of low-dose CT performed for three consecutive years in diagnosis of lung nodules in coal mine workers with 20 working years / 中华劳动卫生职业病杂志

Objective@#To investigate the clinical significance of low-dose CT (LDCT) in coal mine workers with relatively long working years.@*Methods@#A total of 907 coal mine workers with ≥20 working years were enrolled, among whom there were 863 male and 44 female workers with a mean age of 49.5 years. Digital radiography (DR) was performed for these workers in 2013, and LDCT was performed for three consecutive years from 2014 to 2016.@*Results@#A total of 32 workers were found to have lung nodules by DR in 2013, while in 2014, 269 workers were found to have non-calcified lung nodules by LDCT, and there was a significant difference in the number of workers with lung nodules (χ2=233.73, P<0.005) . There was also a significant difference in the detection rate of nodules between the workers with different working years of dust exposure (χ2=6.648, P=0.00) . The male workers had a significantly higher detection rate of nodules than the female workers (χ2=5.690, P=0.017) . There was no significant difference in the number of nodules between workers with different types of work (χ2=16.985, P=0.05) . There were 443 lung nodules in total, among which 71.56% were solid nodules and 55.75% had a size of ≤4mm; malignant nodules were confirmed by surgery in 6 (0.66%) of the 907 workers after baseline LDCT. LDCT reexamination in 2015 and 2016 found new nodules in 8 workers and enlarged nodules in 3 workers, and there was no significant change in the number of nodules with a size of ≤4 mm.@*Conclusions@#It is necessary to perform high-risk population screening for coal mine workers by LDCT. The follow-up strategies for nodules with a size of ≤4mm are the same as those for negative results; annual reexamination is recommended for nodules with a size of >4-8 mm, and clinical treatment should be considered for nodules with a size of >8 mm.

Imaging analysis of burst injury of the lungs in coal miners workers / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To investigate the imaging features of burst injury of the lung in coal miners and to provide reference for clinical diagnosis and treatment.</p><p><b>METHODS</b>A retrospective analysis was performed on the clinical data and imaging findings of 78 patients with burst injury of the lung.</p><p><b>RESULTS</b>The imaging findings of burst injury of the lung were variable and complex, and they varied over time. Eleven cases showed no abnormalities on X-ray and CT within 24 h, but abnormalities appeared within 3 d; 53 cases showed abnormalities on X-ray and CT and had an exacerbation within 3 d; 8 cases showed improvements when reexamined. Among the 78 patients examined by X-ray and (or) CT, ground glass-like shadows were noted in 15 cases, interstitial changes in 13 cases, segmental consolidation in 24 cases, and diffuse consolidation in 26 cases. The complications included pneumothorax (n = 35), hemothorax (n = 28), costal fracture (n = 24), and pulmonary infection (n = 27).</p><p><b>CONCLUSION</b>X-ray plain film and CT offer a reliable basis for early diagnosis of burst injury of the lung. CT is superior to X-ray plain film in detecting lesions, so chest CT should be performed as early as possible to remedy burst injury of the lung.</p>

CT-guided percutaneous catheter drainage in thetreatment of liverabscess / 实用放射学杂志

Objective To investigate the method and curative effect of the CT-guided percutaneous catheter drainage in hepatic ab-scess.Methods 36 patients with liver abscess were treated with “one-step”percutaneous 8F pig tail catheter tube under CT guidance. Results 36 patients were performed “one-step”percutaneous catheter drainage,the successful rate was 100%,no severe complica-tions occurred.Symptoms were improved after cathetering in all patients.Of these 36 patients,30 patients had single abscess and 6 patients had multiple abscesses.The mean duration of drainage catheterization was 21.2 days for 36 patients.The diameter of ab-scess was between 4.0-1 9.5 cm,the mean diameter of abscess was 8.3 cm.Conclusion CT-guided percutaneous hepatic abscess catheter drainage is a safe,effective,minimally-invasive treatment.

CT Analysis of the Giant Cystic Lesions in Abdomen / 实用放射学杂志

Objective To analyse CT findings and CT diagnostic value of the giant cystic lesions in abdomen.Methods CT findings of the giant cystic lesions in abdomen were retrospectively analyzed in 28 pathologically proven cases.Results In 28 cases,there were 4 cases of ovarian cystic, 1 ovarian serous cystadenoma, 1 ovarian mucinous cystadenoma, 3 giant hydronephrosis, 2 cyst of kidney, 2 cyst of ureter,3 pancreatic pseudocyst, 3 splenic cyst, 2 congenital common bile duct cyst, 1 hepatic cyst, 2 cystic lymphangioma, 1 urachal cyst, 1retroperitoneal cystic liposarcoma, 1 unmature cystic teratoma and 1 cystic metastatic carcinoma. Up to 92.9% of the giant cystic lesions inabdomen was benign. Each disease was of its own features on CT scans and certainly location.Conclusion CT is very effective imagingmodality in localization and qualitative diagnosis of the giant cystic lesions in abdomen.

Clinical and CT Analysis of Hemorrhagic Infarction / 实用放射学杂志

Objective To study the relationship between CT and clinic in hemorrhagic infarction . Methods CT findings in 43 cases with hemorrhagic infarction were retrospectively analyzed ,including 30 males and 13 females and aged 26～72 years (mean 51 years) . Most cases had hypertension , headache or/and vomiting . 29 cases were followed up with CT scan after clinical treatment . Results Most cerebral infarction occurred in middle cerebral artery or their branches . On plain CT scans , the lesion appeared as sector , triangular or irregular area of low density in which presented high density lesions of patch and plaque. Conclusion CT is the first diagnostic method for hemorrhagic infarction . CT follow-up can help to observe the treatment result and to evaluate the prognosis of this disease.