Search

The dangerous factors existing during housing construction are prone to safety accidents, so the study of the difficulties and countermeasures in housing construction safety management has a positive effect and contributes to the modern development of the construction industry. This paper analyzes the safety risks during housing construction, discusses the safety management problems in the process of housing construction, and puts forward targeted safety management strategies to promote housing construction safety management.

Background To compare the differences in the diagnosis of retroperitoneal tumors among multi-slice spiral computed tomography (MSCT), magnetic resonance imaging (MRI), and ultrasound (US). Methods Sixty cases of retroperitoneal tumors admitted in our hospital from January 2016 to January 2019 were collected and related data were analyzed. After admission, patients were examined by MSCT, MRI, and US, and the pathological results of the patients were used as the controls. The differences in the diagnosis of retroperitoneal tumors were compared with the results of MSCT, MRI, and US. Results Thirteen cases of benign tumors were diagnosed by MSCT, 47 cases were malignant, and 1 case was false benign, with diagnosis accuracy, sensitivity and specificity of 98.33%, 97.92% and 92.30%, respectively. Thirteen cases of benign tumors were diagnosed by MRI, 47 cases of malignant tumors, and 1 case was false benign, with diagnosis accuracy, sensitivity and specificity of 98.33%, 97.92%, and 92.30%, respectively. Fourteen cases of benign tumor were diagnosed by US, 46 cases were malignant, and 2 cases was false benign, with diagnosis accuracy, sensitivity and specificity of 96.67%, 97.92%, and 85.71%, respectively. There were no statistically significant differences in the accuracy, sensitivity, and specificity of MSCT, MRI, and US in the diagnosis of retroperitoneal tumors (P>0.05). Conclusions MSCT, MRI, and US tests are highly accurate, sensitive, and specific in the diagnosis of retroperitoneal tumors.

Background To accurately identify primary retroperitoneal tumors by multi‐slice spiral CT (MSCT) for better treatment. Materials and Methods The common types of 380 cases of primary retroperitoneal tumor, lesion sites, and MSCT features were compared with pathological results. Fisher's or chi‐square test approaches have been applied in this study. Results Multi‐slice computerized tomography multi‐directional reconstruction has a high accuracy for primary retroperitoneal tumors (95.7%). Seventy‐three liposarcoma cases were located in peri‐renal space, accounting for 76.8% (13/95) of the tumors in this region. Meanwhile, 65 cases of neurogenic tumors were located in the paravertebral column, accounting for 90.3% (65/72) of the tumors in this region. MSCT examination could effectively distinguish benign from malignant of primary retroperitoneal tumor (sensitivity = 87.2%, specificity = 82.7%, accuracy rate = 84.5%). Malignant tumors showed more irregularity shape than benign tumor (χ 2 = 20.468, P

Images of retroperitoneal tumors lack specificity as different tumors resemble one another to and often remain undetectable until they have grown quite large, making diagnosis difficult. Major challenges in diagnosis include how to accurately locate the tumor, how to evaluate the extent of tumor invasion, how to identify the tumor qualitatively, and how to determine the cellular origin of the tumor.