ObjectiveTo systematically review the value of radiomics in the diagnosis of glioblastoma. MethodsPubMed, EMbase, Web of Science and The Cochrane Library databases were electronically searched to collect studies on radiomics in the grading of gliomas or the differentiation diagnosis from inception to May 30th, 2021. Two reviewers independently screened literature, extracted data, and assessed the risk of bias and the quality of the included studies. Meta-analysis was then performed using Meta-Disc 1.4 software and RevMan 5.3 software. ResultsA total of 37 studies involving 2 746 subjects were included. The results of meta-analysis showed that the pooled sensitivity, specificity, and diagnostic odds ratio for the diagnosis of glioblastoma by radiomics were 0.91 (95%CI 0.89 to 0.92), 0.88 (95%CI 0.87 to 0.90), and 78.00 (95%CI 50.81 to 119.72), respectively. The area under the summary receiver operating characteristic (SROC) curve was 0.95. The key radiomic features for correct diagnosis of glioblastoma included intensity features and texture features of the lesions. ConclusionThe current evidence shows that radiomics provides good diagnostic accuracy for glioblastoma. Due to the limited quality and quantity of the included studies, more high-quality studies are required to verify the above conclusions.
ObjectiveTo summarize the manifestations of acute mesenteric ischemia (AMI) on multidetector computed tomography (MDCT) and the diagnostic value of MDCT in the prognosis of AMI. MethodRecent studies on pathophysiology, CT features, and prognosis of AMI were retrieved and reviewed. ResultsVascular insufficiency of AMI could occur as a result of mesenteric arterial embolism, arterial thrombosis, venous thrombosis, or nonocclusive. Two stages of AMI, early and late, were associated with distinct prognosis. In early ischemia, the lesions were reversible. The late AMI was characterized by the development of irreversible transmural necrosis. A delayed diagnosis leaded to considerable mortality. MDCT findings in AMI could be divided into imaging findings related to vascular insufficiency and ischemic intestinal injury. Pneumoperitoneum could be considered a sign of transmural necrosis in the AMI. While, other imaging features predicting transmural necrosis were controversial because of the heterogeneity of diagnostic tests. ConclusionsAMI is a life-threatening abdominal emergency. Early diagnosis can improve the prognosis of patient. It is important for radiologists to identify prognostic features for differentiating early from late forms of AMI.