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<title>Chinese Journal of Magnetic Resonance Imaging RSS feed</title>
<link>http://med-sci.cn/cgzcx/en/contents_list.asp?issue=202003</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
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<title><![CDATA[Computational fluid dynamics analysis of hemorrhagic transformation after reperfusion therapy in acute ischemic stroke patients with middle cerebral artery occlusion]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.03.001</link>
<description><![CDATA[Objective: To explore the relationship between hemodynamics of acute ischemic stroke (AIS) caused by middle cerebral artery occlusion and hemorrhagic transformation (HT) after reperfusion therapy based on computational fluid dynamics (CFD). Materials and Methods: A total of 38 AIS patients with middle cerebral artery occlusion confirmed by magnetic resonance angiography (MRA) were included. The data of MRA before treatment and general clinical data at admission were collected and analyzed retrospectively. Based on MRA-CFD models, hemodynamic parameters were obtained as follows: pressure, wall shear stress (WSS) and wall shear stress gradient (WSSG). Rpressure, RWSS, RWSSG is defined as the ratio of pressure, WSS, WSSG at the beginning of middle cerebral artery to the normal diameter of occlusion, respectively. All patients received standard treatment. According to whether there is bleeding on CT or MRI within 48 hours after treatment, the patients were divided into bleeding group and non-bleeding group. We compared the differences of clinical and hemodynamic parameters between the two groups and underwent correlation analysis. Results:Out of 38 patients, there were 17 patients in the bleeding group and 21 patients in the non-bleeding group. Compared with the non-bleeding group, the bleeding group had more hypertension patients (P=0.008), higher admission systolic blood pressure [(149.1±23.9) mm Hg VS (139.3±16.3) mm Hg,P=0.024] and diastolic blood pressure [(90.2±16.7) mm Hg VS (87.7±8.5) mm Hg, P=0.008], higher plasma homocysteine [(16.6±11.1) μmol/L VS (13.2±3.5) μmol/L, P=0.024]. RWSS and RWSSG in the bleeding group were higher than those in the non-bleeding group (P＜0.05), while there was no statistical difference regarding to Rpressure (P＞0.05). Correlation analysis showed that hypertension (r=-0.428, P=0.007) and Rwss(r=-0.341, P=0.036) had statistical difference with HT after reperfusion therapy. Conclusions: Hypertension, local intravascular RWSS were associated with HT after reperfusion therapy in patients with acute ischemic stroke due to middle cerebral artery occlusion, hypertension and local intravascular high RWSS before treatment were more likely to lead to HT after reperfusion treatment.]]></description>
<pubDate>Fri,20 Mar 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[Characteristics of function of left executive control network in heroin addicts during methadone maintenance treatment: a resting-state fMRI study]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.03.002</link>
<description><![CDATA[Objective: To investigate the characteristics of functional connectivity of left executive control network in heroin addicts during methadone maintenance treatment (MMT). Materials and Methods: Twenty-one heroin addicts during MMT (MMT group) and 20 healthy control subjects matched with age, sex and education level (HC group) were included in the resting-state functional magnetic resonance imaging (fMRI) study using 3.0 T magnetic resonance equipment. First of all, the functional connectivity of the whole brain were calculated based on the region of interest of the left executive control network, and the differences in functional connectivity of the left executive control network between the MMT group and HC group were analyzed. The correlation between the functional connectivity value of the different area and the history of heroin use and methadone treatment was further analyzed in MMT group. Results:The functional connectivity of the left executive control network of heroin addicts in MMT was stronger than that of the healthy subjects. The functional connectivity between the left dorsolateral prefrontal cortex and bilateral dorsolateral prefrontal cortex was enhanced (P＜0.05, corrected with GRF), and the functional connectivity between the left posterior parietal cortex and the left postcentral gyrus was enhanced. (P＜0.05, corrected with GRF). The functional connectivity strength in the above areas was not correlated with the history of heroin use and methadone treatment in MMT group (P＞0.05 respectively). Conclusions: The enhanced functional connectivity between the left lateral dorsal prefrontal cortex and bilateral dorsal lateral prefrontal cortex of heroin addicts during MMT may suggest that methadone can help improve the brain's executive control function and reduce the risk of relapse in heroin addicts. The enhanced functional connectivity between the left posterior parietal cortex and the postcentral gyrus might be a sign of abnormal adaptation to drug related cues due to long-term use of heroin.]]></description>
<pubDate>Fri,20 Mar 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[Whole-tumor histogram analysis of enhanced T1-weighted images for differentiating diagnosis meningioma from choroid plexus papilloma in ventricle]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.03.003</link>
<description><![CDATA[Objective: To investigate the features of whole-tumor histogram derived from enhanced T1-weighted images and its value in identification of meningioma from choroid plexus papilloma in ventricle. Materials and Methods: Retrospectively collected data from pathologically confirmed 33 cases of meningioma and 24 cases of choroid plexus papilloma from November 2009 to November 2019, preoperative routine enhanced MRI scanning were performed. The histogram features of two groups tumor parenchyma regions were extracted by MaZda software on the enhanced T1 weighted imaging axial images, and the gray histogram was performed. Statistical analysis was carried out on the obtained 9 histogram characteristic parameters of mean, variance, kurtosis, skewness, 1st percentile, 10th percentile, 50th percentile, 90th percentile and 99th percentile, so as to compare the characteristic differences between the meningioma and the choroid plexus papilloma. The receiver operating characteristic curve was established and the area under curve was calculated, the binary logistic regression analysis was used to combine the two parameters with larger area under the curve and establish the receiver operating characteristic curve to analyze the differential diagnostic performance of single histogram characteristic parameters and combined variable in meningioma and choroid plexus papilloma. Results:Among the 9 extracted histogram parameters, there were statistical differences between meningioma and choroid plexus papilloma in mean, kurtosis, 1st percentile, 10th percentile, and 50th percentile (all P＜0.05), the calculated areas under receiver operating characteristic curve were 0.73, 0.77, 0.75, 0.78, 0.72, respectively. There were no significant differences in histogram parameters variance, skewness, 90th percentile and 99th percentile (all P＞0.05). The 10th percentile and Kurtosis had higher diagnostic efficiency, with the optimal threshold for 112.40 and 0.63, the sensitivity and specificity of differential diagnosis were 66.70% and 91.70%, 72.70 and 87.50%, respectively. The combination of the two parameters had the highest diagnostic efficiency, the area under the curve was 0.88, the sensitivity and specificity were 87.50% and 81.80%, respectively. Conclusions: Whole-tumor histogram analysis of enhanced T1 weighted images could provide more quantitative information for the differential diagnosis of meningioma and choroid plexus papilloma in ventricle, with the 10th percentile and kurtosis being more diagnostic. The diagnosis efficiency of two-parameter combined may be further improved, which will provide more valuable references for the clinic.]]></description>
<pubDate>Fri,20 Mar 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[Analysis of related factors and prognosis of FLAIR vascular hyperintensity sign in acute ischemic stroke]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.03.004</link>
<description><![CDATA[Objective: To investigate related factors of fluid attenuated inversion recovery vascular hyperintensity (FVH) in patients with acute ischemic stroke (AIS) in middle cerebral artery (MCA), and whether FVH associated with stroke outcome. Materials and Methods:Retrospectively analyzed the clinical and imaging datas of 276 patients with MCA territory AIS (from September 2016 to March 2019). The patients were divided into FVH positive group and negative group. FVH positive group was divided into 3 grades according to the distribution of FVH. In addition, after treatment, 22 patients with grade 3 vascular stenosis in the FVH-positive group completed followup MR examination at7 days after stroke onset, and completed modified Rankin Scale (mRS) evaluation at 90 days. According to the follow up MRA appearance, patients were divided into two groups: vascular recanalization group and non-vascular recanalization group. According to the mRS at 90 days, patients were divided into two groups: good outcome group (mRS≤2) and poor outcome group (mRS＞2). The χ2 test and Fisher's exact test were used to analyze clinical and imaging factors affecting the appear and grade of FVH. Fisher's exact test was used to analyze the disappearance of FVH between the vascular recanalization group and non-vascular recanalization group, as well as the baseline FVH level, the disappearance of FVH and the vascular recanalization after treatment between the good and poor outcome group. The t-test was used to analyze the difference in baseline NIHSS score between the good and poor outcome group. Results:There were no significant differences in age, gender, stroke risk factors and Willis circle classification among the FVH positive and negative groups. The occurrence of FVH was related to the onset-MR examination time, vascular stenosis location, degree and infarct size (P=0.011, P=0.011, P=0.000, P=0.000). The difference between FVH grades and infarct size was statistically significant (χ2=7.026, P=0.030). Among the 22 patients,  the difference was statistically significant in the disappearance of FVH between the vascular recanalization and non-recanalization group (P=0.000).There were significant differences in baseline NIHSS scores and disappearance of FVH after treatment between the good and poor outcome group (P=0.000, P=0.002), no significant differences in baseline FVH level and vascular recanalization after treatment between the two groups (P=0.290, P=0.080). Conclusions: The patients onset-MR examination time, the location and degree of the vascular stenosis were the important factors that affected the occurrence of FVH, and the disappearance of FVH after treatment could be used to predict the recanalization of the occlusive vascular. The patient's outcome is related to the baseline NIHSS score and disappearance of FVH after treatment, low baseline NIHSS score and disappearance of FVH after treatment suggest a good outcome.]]></description>
<pubDate>Fri,20 Mar 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[The value of magnetic resonance spectroscopy in thalamic region of patients with Parkinson<sup>,</sup>s disease]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.03.005</link>
<description><![CDATA[Objective: Multivoxel magnetic resonance spectroscopy was used to study the changes of metabolites in thalamus of patients with Parkinson's disease. The correlation between MRS ratio in thalamus and clinical Hoehn & Yahr rating scale and Unified Parkinson's disease Rating Scale in patients with PD was investigated. Materials and Methods: Thirty patients with PD and 24 age and sex matched volunteers were divided into PD group and control group. Thirty patients in PD group were treated with H-Y grade and UPDRS score. Philips Achieva TX 3.0 T MR imaging system was used to detect the bilateral thalamic regions of the subjects, and the corresponding metabolite ratio and spectral line information were obtained. To investigate the relationship between the ratio of MRS in thalamic area and clinical H-Y grade in PD group, and to compare the correlation between MRS ratio and UPDRS scale. Results:(1) The difference of NAA/Cr, Cho/Cr and NAA/Cho between the left and right thalamus in the control group was not significant (P＞0.05), and the significant difference of NAA/Cr and Cho/Cr was found between the severe side of the PD group and the contralateral thalamus (P＜0.05). (2) The value of NAA/Cr and NAA/Cho in the severe thalamic region of PD group，and the contralateral NAA/Cr value was significantly lower than that of the control group (P＜0.05). (3) There were significant differences in the ratio of symptomatic NAA/Cr, NAA/Cho and contralateral NAA/Cr in the control group, early, middle and late Parkinson's disease. Further multiple comparisons showed that there was significant difference in the severity of NAA/Cr in patients with PD. Spearman correlation analysis showed that there was a strong negative correlation between NAA/Cr value and H-Y grade in the severe thalamic region of PD patients. There was a moderate negative correlation between NAA/Cho value in severe thalamic area, NAA/Cr value and Cho/Cr value in contralateral thalamic area and H-Y grade. (4) Pearson correlation analysis showed that there was a strong negative correlation between NAA/Cr value and UPDRS score in the symptomatic thalamic area of PD patients, and a moderate negative correlation between NAA/Cho value and UPDRS score. There was a negative correlation between the contralateral NAA/Cr value and the Cho/Cr value and the UPDRS score. Conclusions:1H-MRS can noninvasively detect the decrease of nerve function in thalamic area and is closely related to the asymmetrical progress of symptoms and signs of Parkinson's disease, which can provide a certain basis for the diagnosis of Parkinson's disease. There is a certain correlation between the ratio of MRS related metabolites and H-Ygrade and UPDRS score, which plays an auxiliary role in reflecting the severity and stage of the disease.]]></description>
<pubDate>Fri,20 Mar 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[Study of the default mode network in delayed encephalopathy after acute carbon monoxide poisoning using independent component analysis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.03.006</link>
<description><![CDATA[Objective: To explore the characteristic of brain function damage in delayed encephalopathy after acute carbon monoxide poisoning (DEACMP) by using the technique of resting-state functional magnetic resonance imaging technology. Materials and Methods:Twenty-two DEACMP patients and 22 age-, gender- and education-matched healthy controls were studied with resting-state fMRI scan. Independent component analysis (ICA) was employed for the data analysis. One-sample t-test was performed to make the mask of networks components. And then two-sample t-test was performed to explore the difference between DEACMP patients and healthy controls in functional networks. The 24-item Hamilton Rating Scale for depression (HAMD-24), Hamilton Anxiety Rating Scale (HAMA) and Mini-mental State Examination (MMSE) were performed to assess the clinical symptoms. Results:The resting-state mask of default mode network (DMN) was obtained by data analysis in groups. It was found that the DMN functional connectivity in DEACMP patients was higher than that of healthy controls in frontal sup medial, precuneus and angular left. Conclusions: Patients with DEACMP has DMN abnormalities, mainly presenting increased functional connections. Certain cognitive function compensation might occur in those patients.]]></description>
<pubDate>Fri,20 Mar 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[Predicting microvascular invasion of hepatocellular carcinoma based on non-contrast-enhanced MRI radiomics signature]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.03.007</link>
<description><![CDATA[Objective: Magnetic resonance imaging (MRI)-based radiomics signatures was conducted to predict microvascular invasion (MVI) of hepatocellular carcinoma (HCC) preoperatively. Materials and Methods: One hundred and twenty-nine HCC patients who had undergone MRI examination on 3.0 T MRI were recruited. Radiomics features were extracted from fat-suppressed T2-weighted (T2WI-FS) imaging and apparent diffusion coefficient (ADC) map. We used the Variance Threshold, SelectKBest, and least absolute shrinkage and selection operator (LASSO) algorithms in order to perform dimensionality reduction. Then random forests (RF), k-nearest neighbor (KNN), extreme gradient boosting (XGBoost), logistic regression (LR), decision tree (DT) and support vector machine (SVM) algorithm were trained to separate the HCC with MVI positive and with MVI negative. The performance of each model built by the classifier was evaluated by AUC and accuracy. Results:Quantitative imaging features (n=1409) were extracted from T2WI-FS and ADC map respectively. Finally, 12 features of T2WI-FS and 8 features of ADC were selected to construct the radiomics model separately. The model that used SVM classification method achieved the best performance among the six methods, with AUC values of 0.87, accuracy of 0.78 based on T2WI-FS, and AUC values of 0.75, accuracy of 0.71 based on ADC. Conclusions: Good accuracy and AUC could be obtained using only 12 radiomic features of T2WI-FS. Therefore, we proposed radiomics features from T2WI-FS could be used as candidate biomarkers for preoperative prediction of MVI of HCC noninvasively.]]></description>
<pubDate>Fri,20 Mar 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[The value-based T2 histogram analysis for differential diagnosis in solid pancreatic lesions]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.03.008</link>
<description><![CDATA[Objective: To investigate the diagnostic value of 3.0 T magnetic resonance imaging (T2WI) grayscale histogram texture features in solid pancreatic lesions. Materials and Methods: The clinical and MRI imaging data of 117 patients with solid pancreatic mass were retrospectively analyzed, 69 cases of ductal adenocarcinoma, 12 cases of solid pseudopapillary, 15 cases of neuroendocrine tumor and 21 cases of mass pancreatitis were confirmed by surgical pathology. They were divided into malignant tumor group (ductal adenocarcinoma), benign to low-grade malignant tumor group (solid pseudopapilloma and neuroendocrine tumor), and non-tumor group (mass pancreatitis). The region of interest (ROI) was delineated at the maximum lesion on T2WI sequence using GE Omni-kinetics software and automatically generate grayscale texture parameters of straight, comparison between the 3 groups using one-way analysis of variance (ANOVA), Pairwise comparisons between groups were made by LSD-t-test (homogeneity of variance) or by Kruskal-walls test of multiple independent samples (heterogeneity of variance). Parameters with a statistical difference were screened, and the ROC curve was drawn to evaluate the efficacy of differential diagnosis of solid pancreatic lesions. Results:Mean, Variance, Energy, Entropy, 5th percentile, 10th percentile, 25th percentile, 50th percentile, 75th percentile, 90th percentile, and 95th percentile were statistically significant (all P＜0.05). There was no statistical difference in skewness and kurtosis between the three groups (all P＞0.05). The sensitivity of variance to differentiate PDAC and MFCP was 82.6%, the specificity was 85.7%, the area under the curve was 0.899, and the best cut-off value was 5915.87. The sensitivity of mean to differentiate PDAC and SPT+pNET was 64.4%, the specificity was 87.0% and the area under the curve was 0.688, the cut-off was 1113.55. The sensitivity of 90th percentile to differentiate MFCP and SPT+pNET was 88.9%, the specificity was 85.7% and the area under the curve was 0.924, the cut-off was 837.59. They had a high identification efficiency. Conclusions: There are significant differences in the texture parameters of the T2WI histogram between solid pancreatic lesions. Mean and Percentile have significant clinical value in the qualitative and benign or malignant differentiation of solid pancreatic lesions.]]></description>
<pubDate>Fri,20 Mar 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[Diagnosis and clinical value of magnetic resonance imaging in scar pregnancy]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.03.009</link>
<description><![CDATA[Objective: To investigate the features and clinical value of cesarean scar pregnancy (CSP) using 3.0 T magnetic resonance imaging (MRI). Materials and Methods: The basic clinical information of 38 patients with CSP diagnosed at the affiliated hospital of Yangzhou university from July 2013 to April 2019 was collected retrospectively. The pelvis of all cases was imaged on a 3.0 T GE 750 W scanner. The characteristics and growth patterns of lesions, the presence or absence of vascular emptying, the length of the gestational sac and scar intersection, the distance from gestational sac to the uterine serosa surface, and relevant treatment options were evaluated. Results:The gestational sac can be characterized by simple cystic and mixed masses on MR images, and the mixed masses had significantly larger maximum diameter, gestational sac volume and length of uterine scar than the simple cystic gestational sacs (P＜0.05). The gestational sac could be divided into exogenous and endogenous according to the growth pattern, exogenous type had more blood supply and shorter distance from the uterine serosa than endogenous gestational sac (P＜0.05). All 38 patients with CSP had good prognosis after undergoing related treatment, and the blood HCG returned to normal value within 1-3 months. Conclusions: Magnetic resonance imaging can comprehensively investigate the characteristics of the lesion and its relationship with surrounding tissues for the patients with CSP, and provide a basis for individualized clinical treatment.]]></description>
<pubDate>Fri,20 Mar 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[A research of the default mode network in patients with chronic neck and shoulder pain of cervical spondylotic radiculopathy]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.03.010</link>
<description><![CDATA[Objective: To explore the changes of DMN functional connections in cervical spondylotic radiculopathy (CSR) patients with chronic neck and shoulder pain by independent component analysis (ICA). Materials and Methods: Twenty-nine subjects were scanned with conventional magnetic resonance, high resolution 3D-T1 structural imaging and resting state functional magnetic resonance (rs-fMRI) using 3.0 T MR. VAS was performed at the end of the scan. ICA was used to separate and extract the DMN. The changes of the DMN functional connections between the two groups were compared and analyzed. Pearson correlation analysis was made between the functional connections strength of different brain regions and VAS score. Results:Compared with the normal group, the functional connections of thalamus, hippocampus, basal nucleus, left middle temporal gyrus and anterior cuneiform lobe decreased, and the functional connections of right superior temporal gyrus increased in patients. There was a negative correlation between hippocampal functional connections and VAS score (r=-0.546, P=0.043). Conclusions: The changes of functional connections of DMN in patients with chronic pain of CSR may be related to the changes of cognitive pain processing, emotional processing and memory function in patients with chronic pain of CSR.]]></description>
<pubDate>Fri,20 Mar 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[The value of MRI gray scale ratio in the differential diagnosis of adrenal pheochromocytoma and lipid-poor adrenal adenoma]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.03.011</link>
<description><![CDATA[Objective: To investigate the value of MRI gray scale ratio in the differential diagnosis of adrenal pheochromocytoma (PHEO) and lipid-poor adrenal adenoma (LPAA). Materials and Methods: The MRI enhancement data of 15 cases of adrenal PHEO and 10 cases of LPAA confirmed by operation and pathology were retrospectively analyzed. The solid part of the pre-enhanced lesion and the gray level of the same position were measured. The MRI gray scale ratios of each stage of enhancement were defined and calculated as (post-enhancement-pre-enhancement)/pre-enhancement ratios. The two groups were analyzed by independent sample t test, and the diagnostic efficiency was evaluated by ROC curve. Results:The grayscale ratios of MRI in the cortical, medullary and delayed phases of 15 PHEO groups and 10 LPAA groups were (2.686±0.506)/(3.828±4.452), respectively (t=-0.992, P=0.331), 2.479±0.390)/(1.412±0.483) (t=6.228, P＜0.001), (2.105±0.402)/(1.074±0.380) (t=6.607, P＜0.001), adrenal PHEO is rapid-lowering type strengthened, LPAA is a speed-up-down type enhancement. There was a statistically significant difference between the two groups in the medullary and delayed MR gray scale ratios. The area under the curve and the optimal threshold value for differentiating PHEO from LPAA were 0.976 and 2.045, 0.982 and 1.526, respectively. The corresponding sensitivity and specificity were 93.3% and 90.9%, 100.0% and 90.9%, respectively. Conclusions: The gray scale ratio of MRI has high clinical value in differential diagnosis of adrenal PHEO and LPAA, and can be used as an effective supplement for routine MR examination.]]></description>
<pubDate>Fri,20 Mar 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[Diffusion kurtosis imaging: research advances in brain tumors]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.03.013</link>
<description><![CDATA[Diffusion kurtosis imaging (DKI) is an extension of diffusion tensor imaging (DTI) technology, which can quantify the non-gaussian diffusion characteristics of water molecules in tissues. It is more sensitive to the complex microstructure of human tissues than other technologies, and it can provide more information about structural changes and reflect the pathophysiological changes of diseases, which is conducive to early detection of diseases and early guidance of clinical decision-making. At present, DKI technology has been widely applied in clinical diseases and scientific research. This paper mainly reviews the research progress of DKI in brain tumors at home and abroad.]]></description>
<pubDate>Fri,20 Mar 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[The research status of structural and functional imaging in Parkinson<sup>,</sup>s disease with visual hallucinations]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.03.014</link>
<description><![CDATA[Parkinson's disease (PD) is a common neurodegenerative disease characterized by various motor and non-motor symptoms. Visual hallucinations are most common  non-motor symptoms, which seriously affect the quality of life of PD patients, increase the hospitalization and mortality rate, and the burden of care, available data indicates that PD patients with visual hallucinations are more likely to develop cognitive impairment. However, the mechanism of PD with visual hallucinations are remain unclear. With the development of technologies, more and more structural and functional imaging research being conducted to detect the structural and functional changes in PD with visual hallucinations patients.]]></description>
<pubDate>Fri,20 Mar 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[Advances in imaging studies of senile depression]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.03.015</link>
<description><![CDATA[Late -life depression (LLD), as a heterogeneous syndrome, is a common clinical psychiatric disorder. At present, the pathophysiological mechanism of senile depression is not clear, and many previous studies often emphasize that its occurrence is related to vascular damage, nerve inflammation and other changes. With the development of imaging technology, more and more neuroimaging studies have shown that the pathogenesis of senile depression is closely related to changes in brain structure, brain function and brain metabolism. As a non-invasive examination method, imaging technology is becoming more and more mature. Compared with the widely used clinical diagnosis methods, it can provide more visual evidence and reduce the error caused by subjective factors. Now, imaging has been widely used in the study of neurobiological mechanism of senile depression, which provides new ideas and treatment methods for the diagnosis, treatment and prognosis evaluation of senile depression. This article will review the study of imaging in senile depression.]]></description>
<pubDate>Fri,20 Mar 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[Value of the central vein sign in multiple sclerosis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.03.016</link>
<description><![CDATA[The diagnosis of multiple sclerosis (MS) is often difficult, timely and correct diagnosis plays an important role in the early treatment and prognosis of the disease.In multiple sclerosis, magnetic resonance imaging (MRI) is a sensitive tool for detecting white matter lesions, but its diagnostic specificity is still suboptimal; ambiguous cases are frequent in clinical practice. Detection of perivenular lesions in the brain (the “central vein sign, CVS”) improves the pathological specificity of MS diagnosis, and the discovery of central vein sign is expected to be a marker for the diagnosis of MS. Recent studies have demonstrated that the CVS may have the ability to accurately differentiateMSfrom its mimics. This review will systematically analyze the characteristics of CVS of MRI and its role in the diagnosis and differentiation of MS to provide important clues for the clinical diagnosis of MS.]]></description>
<pubDate>Fri,20 Mar 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[Advances in imaging evaluation of resectability of lymph nodes in breast cancer]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.03.017</link>
<description><![CDATA[Axillary lymph node dissection of breast cancer has different degree of dissectionaccording to different conditions, which requires the detailed imaging results of breast cancer lymph nodes before operation to evaluate its resectability. There are many imaging methods to evaluate the resectability of lymph nodes in breast cancer, including ultrasound, X-ray, CT, MRI, nuclear medicine, etc. MRI has the best diagnostic performance and can provide rich imaging information. In terms of the resectability of lymph nodes in breast cancer, mDIXON technology is applied to axillary vascular imaging to provide detailed information about the relationship between axillary lymph nodes and blood vessels, guide the preoperative evaluation of lymph node dissection in breast cancer and formulate the operation plan, so as to reduce the amount of bleeding.]]></description>
<pubDate>Fri,20 Mar 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[Research progress of multimodal magnetic resonance imaging in chronic neck and shoulder pain in cervical spondylosis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.03.018</link>
<description><![CDATA[Cervical spondylosis is a chronic degenerative disease, and cervical disc degeneration is one of its main manifestations. Clinical manifestation of this disease is neck, shoulder and back pain, bilateral numbness of upper limbs. Functional magnetic resonance imaging (fMRI) to accurately assess the signal changes of the cervical intervertebral disc, and which can reflect subtle changes in the structure and function of the brain and spinal cord caused by chronic pain. Eventually, it provides the basis for the study of neuropathological mechanism and the evaluation of clinical efficacy. This article mainly reviewed multimodal MRI imaging (conventional MRI, diffusion tensor imaging, voxel-based morphology, functional magnetic resonance imaging, magnetic resonance spectroscopy) in the status and progress of cervical spondylosis.]]></description>
<pubDate>Fri,20 Mar 2020 00:00:00  GMT</pubDate>
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