Objective To evaluate the effectiveness of multiple spiral CT angiography in diagnosis of pulmonary embolism.Methods 16 patients clinically suspected of pulmonary embolism underwent multiple spiral CT angiography.Emboli were found in the 8 patients of all on multiple spiral CT angiography.5 of the patients were reexamined with this method 20 to 30 days after thrombolysis. Results In 8 patients with pulmonary embolism,43 vessels were involved with pulmonary embolism.The presence of pulmonary embolism on CT was seen as a total occlusion,partial filling defect,mural filling defect et al;dilated of pulmonary artery trunk;all signs with deceleration of pulmonary blood or “mosaic sign”. 5 patients were reexamined with this method.The emboli dissoved partly or entirely.Conclusion Multiple spiral CT angiography is a noninvasive and effective method for examining pulmonary embolism.

Objective To evaluate the display ability and the clinical application of multislice spiral CT virtual endoscopy (CTVE) in the diagnosis of vascular diseases. Methods Fifty-six patients were examined by CT virtual endoscopy.32 patients also had DSA for comparison.18 patients were confirmed by operation (3 patients also had DSA).9 patients with pulmonary embolism were confirmed by other examinations and treatments.Results 56 patients showed successful CT virtual endoscopy images.CT virtual endoscopy images could clearly show the inner wall and inner structures of the vessels,mural thrombus,calcification form,stenosis of the vessels,the true and false lumina of aortic dissections,the lesion of false aneurysm,and the anatomic relationship between the lesion and surrounding structures of the normal vessels.Out of the 32 patients with vessel abnormalities on DSA,24 patients (75%) showed the lesions on CTVE.17 out of 18 patients with operation showed the lesions on CTVE.All 9 patients with pulmonary embolism showed the abnormalities on CTVE.Chi-square test:? 2=5.2809,P=0.071 patients showed the vascular diseases on CTVE in 56 patients (84%).Conclusion MSCT virtual endoscopy could provide more information of the vessel by displaying the inner wall and allowing users to map the vessels in a display.It is helpful in correct diagnosis and guiding surgery.

Objective:This study aimed to analyze differential metabolites in patients using a dual metabolic platform and to orientate early nutritional intervention in patients with cirrhosis.Methods:The skeletal muscle index (SMI) was calculated based on computed tomography (CT) measurements of skeletal muscle cross-sectional area at the third lumbar vertebra level. Pre-sarcopenia was diagnosed for males with SMI < 46.96 and for females with SMI < 32.46. Fifteen HBV-related liver cirrhosis patients with pre-sarcopenia were included as Group S while fourteen liver cirrhosis without pre-sarcopenia were Group NS. Liquid chromatography-mass spectrometry (LC-MS) and gas chromatography-mass spectrometry (GC-MS) analyses were used to detect differential metabolites and disturbed pathways in the two groups.Results:Five pathways and twenty-eight pathways were defined as disturbed pathways in the plasma of liver cirrhosis patients with pre-sarcopenia by LC-MS and GC-MS, respectively. Most of these pathways are related to amino acid metabolism. Forty-two differential metabolites were imported into the disturbed pathways. Moreover, 3-hydroxypropanal, hydrocinnamic acid, betaine aldehyde, phosphohydroxypyruvic acid, (r)-3-hydroxybutyric acid, and creatinine were identified as potential biomarkers for pre-sarcopenia in HBV-related liver cirrhosis.Conclusions:The study identified a total of 33 pathways and related differential metabolites that were disturbed in HBV-related liver cirrhosis with pre-sarcopenia. The amino acid metabolism, urea cycle, and glyoxylate and dicarboxylate metabolism pathways may be associated with pre-sarcopenia in patients with HBV-related liver cirrhosis. These results provide a direction for nutritional supplementation in liver cirrhosis.

Objective To investigate the clinicopathological characteristics of radioactive Iodine-refrac-tory differentiated thyroid cancer(RAIR-DTC)to provide a clinical evidence for early prediction of the thyroid cancer patients with radioactive Iodine-refractory(RAIR).Methods The data of 84 patients with undergoing thyroidectomy and 131I therapy in PLA 960 hospital from January 2010 to December 2019 were retrospectively analyzed.Thirty-nine patients with diagnosed RAIR-DTC served as the study group and 45 cases of radioactive iodine-avid differentiated thyroid cancer(RAIA-DTC)served as the control group.The clinicopathological characteristics were compared between the two groups.The logistic regression was used to analyze the inde-pendent risk factors of RAIR-DTC,and the RAIR-DTC prediction model was established.Results Compared with the RAIA-DTC group,the RAIR-DTC group had more iodine treatment times,the proportions of the pa-tients with age ≥55 years old,total iodine therapeutic dose,distant metastasis,TNM stage Ⅳ,high-risk sub-types and focal calcification were higher,the tumor maximum diameter was greater,the number of lymph node metastases was more and the probability of Ⅱ,Ⅰ+Ⅱ and non-central lymph node metastases was higher(P＞0.05).The progression-free survival rate had statistical difference between the two groups(P＜0.05).The total survival rate had no statistical difference between the two groups(P＞0.05).The binary logistic re-gression analysis results showed that the distant metastasis,high-risk histological subtype and maximum tumor diameter ≥10.5 mm were the independent risk factors for RAIR-DTC.The obtained fitting equation logit(P)=-2.259+3.330X1+2.287X2+1.606X3,the ROC curve was used to calculate the truncation val-ue of the fitted equation as-0.312 5,when logit(P)＞-0.312 5,it might develop into RAIR-DTC.Conclusion The clinicopathological characteristics of the patients with differentiated thyroid cancer could ef-fectively predict RAIR.