RESUMO
Objective:To investigate the application value of multi-slice spiral CT angiography in the clinical diagnosis of aortic dissection.Methods:The clinical data of 78 patients with aortic dissection diagnosed by digital subtraction angiography and treated between January 2015 and December 2019 in Putuo District People's Hospital of Zhoushan and Zhoushan Hospital were retrospectively analyzed. All patients underwent multi-slice spiral CT angiography and digital subtraction angiography. The type of aortic dissection, the number of aortic lacunas, the distance between the lacuna and the left subclavian artery, the involved branches, the percentage of artery wall calcification, and arterial dissection thrombosis determined by multi-slice spiral CT angiography and digital subtraction angiography were compared.Results:All 78 patients were diagnosed with aortic dissection by digital subtraction angiography, and 75 (96.2%) were diagnosed with aortic dissection by multi-slice spiral CT angiography. The same type of aortic dissection was detected by multi-slice spiral CT angiography and digital subtraction angiography, but three patients were misdiagnosed with pericarditis by multi-slice spiral CT angiography. There were no significant differences in the number of aortic lacunas and the distance between the lacuna and the left subclavian artery between the two methods ( t = 1.02, 0.57, both P > 0.05). The involved branches [61.3% (46/78),] the percentage of artery wall calcification [26.7% (20/78)], and the percentage of arterial dissection thrombosis [78.7% (59/78)] determined by multi-slice spiral CT angiography were significantly higher than 43.6% (34/75), 12.8% (10/75), and 62.8% (49/75) respectively determined by digital subtraction angiography ( χ2 = 4.83, 4.65, 4.62, all P < 0.05). Conclusion:Multi-slice spiral CT angiography exhibits a similar capacity to identify aortic dissection to digital subtraction angiography. It can accurately determine the number and location of aortic lacunas, display the calcification and thrombosis of vascular wall, and is minimally invasive and simply operated. Therefore, multi-slice spiral CT angiography is of high application value in the clinical diagnosis and preoperative evaluation of aortic dissection.
RESUMO
Objective To compare the diagnostic value of MRI and CT in neuroblastoma of central nervous system.Methods The clinical and imaging data of 40 patients with highly suspected neuroblastoma of the central nervous system admitted to the Traditional Chinese Medicine Hospital of Putuo District from January 2013 to January 2018 were retrospectively analyzed.According to the imaging examination methods,they were divided into MRI group (22 cases) and CT group(18 cases).Results A total of 19 cases of neuroblastoma of central nervous system were confirmed by pathology and 16 cases by CT after operation in the group of MRI.The accuracy,sensitivity and specificity of MRI and CT in the diagnosis of neuroblastoma of central nervous system were 86.36％ (19/22),88.89％ (16/18),89.47％ (17/19),87.50％ (14/16),66.67 ％ (2/3) and 50.00％ (1/2),respectively.The accuracy,sensitivity and specificity between the two groups had no statistically significant differences(all P ＞0.05).The solid part of the tumors showed equal or slightly longer T1 WI and T2WI signals,while the FLAIR sequence was mainly equal signal.The cystic part showed long T1 WI and T2WI signals,while the low FLAIR sequence signals.The tumors had clear margins and slight edema around the tumors.CT showed that the solid part of the tumors was homogeneous or slightly high density,with calcification and cystic part showing homogeneous low density.Conclusion Both MRI and CT are of high accuracy in the diagnosis of neuroblastoma of the central nervous system,and there are some similarities between them.
RESUMO
Objective To evaluate the clinical value of magnetic resonance imaging T2WI texture analysis in the diagnosis of prostate cancer.Methods A total of 78 patients with pathological-confirmed prostate cancer and prostatic hyperplasia from Jan.2016 to Dec.2018 in our hospital were retrospectively collected.MaZda software was used to analyze 300 texture feature parameters of each lesion on T2WI images,and Weka software was used to select the most discriminative texture feature parameters.The differences of texture features between the two groups and diagnostic efficacy were compared by independent sample t test,Mann-Whitney U test and ROC.Results There were 7 texture feature parameters of the most discriminative significance between the two groups:AngScMom,Contrast,Entropy,Horzl_GLevNonU,45dgr_RLNonUni,WavEnLL_s-1 and WavEnHL_s-3,respectively.There were significant differences in 7 texture feature parameters between prostate cancer group and prostate hyperplasia group (P＜0.05).The AUC of each texture feature was between 0.78 and 0.91,the accuracy was between 79.6％ and 92.1％,the sensitivity was between 70.8％ and 91.9％,and the specificity was between 72.2％ and 92.5％,respectively.Conclusions The texture features parameters of T2WI images are different in the diagnosis of prostate cancer and prostatic hyperplasia.As an objective and quantitative analysis method,texture features analysis can be used in the differential diagnosis of prostate cancer and prostatic hyperplasia.
RESUMO
Objective@#To compare the diagnostic value of MRI and CT in neuroblastoma of central nervous system.@*Methods@#The clinical and imaging data of 40 patients with highly suspected neuroblastoma of the central nervous system admitted to the Traditional Chinese Medicine Hospital of Putuo District from January 2013 to January 2018 were retrospectively analyzed.According to the imaging examination methods, they were divided into MRI group(22 cases) and CT group(18 cases).@*Results@#A total of 19 cases of neuroblastoma of central nervous system were confirmed by pathology and 16 cases by CT after operation in the group of MRI.The accuracy, sensitivity and specificity of MRI and CT in the diagnosis of neuroblastoma of central nervous system were 86.36%(19/22), 88.89%(16/18), 89.47%(17/19), 87.50%(14/16), 66.67%(2/3) and 50.00%(1/2), respectively.The accuracy, sensitivity and specificity between the two groups had no statistically significant differences(all P>0.05). The solid part of the tumors showed equal or slightly longer T1WI and T2WI signals, while the FLAIR sequence was mainly equal signal.The cystic part showed long T1WI and T2WI signals, while the low FLAIR sequence signals.The tumors had clear margins and slight edema around the tumors.CT showed that the solid part of the tumors was homogeneous or slightly high density, with calcification and cystic part showing homogeneous low density.@*Conclusion@#Both MRI and CT are of high accuracy in the diagnosis of neuroblastoma of the central nervous system, and there are some similarities between them.
RESUMO
Objective To compare the diagnostic value of X-ray,CT or MRI in detection of abnormal sacroiliac joint changes in patients with early stage ankylosing spondylitis.Methods One hundred and twenty patients with early stage ankylosing spondylitis who admitted in our hospital underwent X-ray,CT and MRI subsequently were selected,and the diagnostic value was analyzed.Results There were no statistically significant differences in diagnostic accuracy of articular cartilage swelling,joint space narrowing,joint space widening,the articular surface of cystic mass,articular sclerosis by CT and MRI(all P>0.05),except for bone erosion and bone cyst lesion(x2 =8.179,6.289,all P0.05).Conclusion X-ray associated with low accuracy rate and high rate of miss diagnosis.With the high accuracy rate in detection of abnormal sacroiliac joint changes in patients with early stage ankylosing spondylitis,both CT and MRI are candidate for commonly used diagnostic methods for early diagnosis.