ABSTRACT
Soil salinity has been a major factor affecting agricultural production in the Keriya Oasis. It has a destructive effect on soil fertility and could destroy the soil structure of local land. Therefore, the timely monitoring of salt-affected areas is crucial to prevent land degradation and sustainable soil management. In this study, a typical salinized area in the Keriya Oasis was selected as a study area. Using Landsat 8 OLI optical data and ALOS PALSAR-2 SAR data, the optical remote sensing indexes NDVI, SAVI, NDSI, SI, were combined with the optimal radar polarized target decomposition feature component (VanZyl_vol_g) on the basis of feature space theory in order to construct an optical-radar two-dimensional feature space. The optical-radar salinity detection index (ORSDI) model was constructed to inverse the distribution of soil salinity in Keriya Oasis. The prediction ability of the ORSDI model was validated by a test on 40 measured salinity values. The test results show that the ORSDI model is highly correlated with soil surface salinity. The index ORSDI3 (R2 = 0.656) shows the highest correlation, and it is followed by indexes ORSDI1 (R2 = 0.642), ORSDI4 (R2 = 0.628), and ORSDI2 (R2 = 0.631). The results demonstrated the potential of the ORSDI model in the inversion of soil salinization in arid and semi-arid areas.
Subject(s)
Salinity , Soil , China , Radar , Soil/chemistry , Space SimulationABSTRACT
Objective:To investigate the risk factors related to choledocholithiasis in gallstone patients.Methods:The clinical data of 140 patients with gallstones or gallstones complicated with choledocholithiasis treated at our hospital from Jan 2017 to Dec 2019 were analyzed retrospectively.Results:The results showed gallstones≥ 10 mm (χ 2=7.896, P=0.019), parapapillary diverticulum (χ 2=10.849, P=0.013), the number of gallstones (single vs. multiple) (χ 2=9.760, P=0.080), age ( t=2.767, P=0.006), diameter of common bile duct ( t=8.068, P=0.000), total bilirubin level ( t=2.372, P=0.019), alkaline phosphatase ( t=2.448, P=0.016), significantly related to the formation of common bile duct stones. Logistic regression analysis showed that gallstone ≥ 10 mm, common bile duct dilatation, parapapillary diverticulum and multiple gallstones were all independent risk factors for choledocholithiasis in gallstone patients. Conclusion:A variety of risk factors were responsible for the formation of choledocholithiasis in gallstone patients.
ABSTRACT
Objective:To analyze the treatment and the impact of brain metastases on patients with hepatic alveolar hydatid disease.Methods:The data of 11 patients with hepatic alveolar hydatidosis with brain metastases treated at the First Affiliated Hospital of Xinjiang Medical University from January 2014 to December 2019 were retrospectively analyzed. There were 7 males and 4 females. The age range was 19~49 years, with an average of 34 years. Of 11 patients, 7 were treated with surgery combined with drugs and 4 with drugs only. Analyze the treatment and results of patients.Results:Of the 7 patients who were treated with surgery and drugs, 2 patients underwent hepatectomy. They were treated with regular postoperative oral medication and were well on follow-up. Three patients underwent only brain surgery. On follow-up from 1 to 3 years, one patient developed pneumonia with atelectasis, another patient developed ascites and jaundice with physical decline. The third patient was stable and had an independent life. Two patients underwent partial hepatectomy and hydatidectomy, with one patient requiring repeated hydatidectomies. On follow-up for one of these 2 patients for 5 years, the patient was home bound and could not take care of himself. The other patient was followed up for 3 years and was stable, alive and able of self-care. Four patients were treated with albendazole liposome, including one patient who developed ascites, a second one with weight loss, physical decline, limb edema and a third one with pleural effusion, pelvic effusion and pneumonia. These patients were still alive with improvement of symptoms on supportive treatment.Conclusion:The treatment of hepatic alveolar hydatidosis with brain metastases is still mainly surgery and anti-hydatid drugs. The prognosis of most patients was poor. The surgical principle is neurosurgery first, followed by surgery on liver, lung, spleen and other organs involved by hydatid disease.
