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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=202004</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
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<title><![CDATA[Investigation of intracerebral enlarged perivascular space in cognitive impairment groups with different severity]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.04.001</link>
<description><![CDATA[Objective: To investigate the intracerebral enlarged perivascular spaces (EPVS)  in middle-aged and old people from community among cognitive impairment groups with different severity, and to analyze the relationship between EPVS and cognitive function. Materials and Methods: 48 people with subjective cognitive decline (SCD), 43 people with amnestic mild cognitive impairment (aMCI), 44 people with Alzheimer’s disease (AD) and 43 normal controls (NC) were included in the study. Multiple neuropsychological tests and multi-modal magnetic resonance imaging were conducted. EPVS in the basal ganglia and centrum semiovale were counted and graded from 0 to 4. Kruskal-Wallis test and Kolmogorov-Smirnov Z test were used to analyze the inter-group difference. Relationship between the scores of EPVS and cognitive function were analyzed using Spearman’s Correlation analyses and partial correlation. Results: EPVS was shown in all the examinees. EPVS score in AD group (3.18±0.58) was significantly higher than that in SCD group (2.60±0.64)(P＜0.01), aMCI group (2.77±0.81)(P＜0.05) and NC group (2.56±0.77)(P＜0.01). PVS score were positively associated with age (P＜0.05). After controlling age, gender and years of education, the partial correlation result showed that PVS scores in the centrum semiovale were negatively correlated with MMSE, MoCA-B (r=-0.30, -0.37, P=0.000), were negatively correlated with AVLT-N5, N7 scores (r=-0.241, P=0.002; r=-0.275, P=0.000), were significantly negatively associated with BNT scores (r=-0.257, P=0.001). However, no difference was found in EVPS in the basal ganglia. Conclusions: The EPVS in the centrum semiovale of AD group increases. EPVS in the centrum semiovale is negatively correlated with overall cognitive function, memory and language functions.]]></description>
<pubDate>Mon,20 Apr 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[Resting state amplitude of low-frequency fluctuation alterations of mild cognitive impairment in patients with multiple system atrophy]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.04.002</link>
<description><![CDATA[Objective: To investigate cognitive-related changes of spontaneous activity in multiple system atrophy (MSA) patients using amplitude of low-frequency fluctuation (ALFF) approach. Materials and Methods: Resting state functional magnetic resonance imaging (rs-fMRI) data were selected from 29 MSA patients with normal cognitive function (PD-NC), 33 MSA patients with mild cognitive impairment (PD-MCI), and 33 healthy controls (HC). ALFF changes were compared between subgroups. Spearman correlation test was taken between patients' ALFF values of changed brain regions and montreal cognitive assessment scale (MoCA) scores. Results: Compared to HC, MSA-NC showed increased ALFF in left angular gyrus and right middle temporal gyrus (MTG). MSA-MCI showed decreased ALFF in bilateral ventral prefrontal cortex (VLPFC), dorsolateral prefrontal cortex (DLPFC), anterior and middle cingulum cortex (ACC, MCC) compared to HC, while it showed increased ALFF in bilateral inferior temporal gyrus (ITG), angular gyrus, left middle occipital gyrus, right middle temporal gyrus (MTG), precuneus, right cerebellum and vermis in the same comparison. Compared to MSA-NC, MSA-MCI showed decreased ALFF in right frontal lobe and increased ALFF in right cerebellum. In addition, MSA patients' ALFF values in right frontal lobe were positively correlated with MoCA scores (r=0.531, P＜0.05), while the correlation was negative in the right cerebellum (r=-0.449, P＜0.05). Conclusions: Functional damage in frontal lobe and cerebellum are associated with MSA specific mild cognitive impairment, and the cerebellum may play a compensatory role.]]></description>
<pubDate>Mon,20 Apr 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[Preliminary study of brain resting state functional magnetic resonance local consistency analysis in patients with mild cognitive impairment]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.04.003</link>
<description><![CDATA[Objective: To explore the characteristics of functional brain changes in patients with mild cognitive impairment (MCI) with regional homogeneity (ReHo), and further explore the relationship between the changes of ReHo value of corresponding brain regions and cognitive function and clinical physiological indicators. Materials and Methods: A total of 39 subjects were collected, including 17 MCI patients and 22 healthy volunteers with matching age, gender, and education years. All subjects were subjected to resting-state functional magnetic resonance imaging (rs-fMRI) scan, using the ReHo analysis method, to compare the resting brain area between MCI patients and healthy volunteers in the resting state. Then extract the significant differences in ReHo values of brain regions and cognitive assessment scale and clinical physiological indicators for correlation analysis. Results: Compared with healthy controls, MCI showed significantly decreased ReHo values in right insula/ fusiform gyrus, left cerebellar hemisphere/paracingulate cortex/inferior frontal gyrus/ fusiform gyrus, while increased ReHo values in left superior temporal gyrus and right superior frontal gyrus. The montreal cognitive assessment scale (MoCA) were inversely correlated with the ReHo values of right insula (r= -0.487, P=0.002), and positively correlated with the ReHo values of left superior temporal gyrus (r=0.610, P＜0.001) and right dorsal lateral frontal gyrus (r=0.475, P=0.002) in all subjects. The mini mental status examination (MMSE) were inversely correlated with the ReHo values of upper left cerebellum (r=-0.407, P=0.010), and positively correlated with the ReHo values of left superior temporal gyrus (r=0.466, P=0.003) in all subjects. Furthermore, the ReHo values of right insula were inversely correlated with the fructosamine concentrations in the blood plasma (r=-0.630, P=0.007) and the ReHo values of left cerebellar hemispherehave negative correlation with serum creatinine concentration (r=-0.579, P=0.015) in MCI. Conclusions: The ReHo value of rs-fMRI in patients with MCI was significantly changed, and there was a certain correlation with changes in cognitive function and clinical physiological data.]]></description>
<pubDate>Mon,20 Apr 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[Resting-state functional MRI to assess the brain function before and after the operation of children with cerebral palsy]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.04.004</link>
<description><![CDATA[Objective: To investigate the effect of cervical perivascular sympathectomy on brain function in children with cerebral palsy by using resting-state functional MRI (rs-fMRI). Materials and Methods: Twenty-one children with hemiplegic cerebral palsy underwent routine MRI and rs-fMRI scanning before and after operation. Data processing assistant for rs-fMRI (DPARSF) software package was used to process. Paired sample t-test was performed to compare the differences of amplitude of low-frequency fluctuation (ALFF) and regional homogeneity (ReHo) values before and after the operation. Results: Compared with pre-operation, increased ALFF and (or) ReHo was found in the multiple brain regions of the affected side, in the normal side, the ALFF increased in cerebellum anterior lobe (P＜0.05). Decreased ALFF and (or) ReHo was found in multiple brain regions of the normal side, in the affected side, ALFF and ReHo decreased in superior frontal gyrus. Conclusions: The results of rs-fMRI show that cervical perivascular symphathectomy improve the spontaneous low-frequency oscillation activity of neurons in related areas, and strengthen the functional connection of relevant brain regions.]]></description>
<pubDate>Mon,20 Apr 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[Early brain overgrowth in children with autism spectrum disorders  based on structural magnetic resonance imaging]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.04.005</link>
<description><![CDATA[Objective: Autism spectrum disorders (ASD) is a severe and pervasive neurodevelopmental disorder. At present, the etiology of ASD is still an unsolved problem in the world of medicine, and remains poorly understood. In this study, regional features extracted by structural magnetic resonance imaging were used to study brain dysplasia in ASD. Materials and Methods: This study investigates brain developmental abnormalities in patients with ASD by utilizing regional features extracted from structural magnetic resonance imaging (sMRI). Regional features include cerebral cortex thickness, gray matter and white matter region volume, and several subcortical structures extracted from a predefined regions of interest (ROI). Results: Through the analysis of 150 items of cerebral cortex and volume by t test, this study found that there were significant differences in 66 items among children with ASD and the normal control group (P＜0.05), and the brains of children with ASD showed significant patterns of excessive growth compared with older, normal-developing children, especially in the parietal, occipital, frontal, temporal and precuneus region. Conclusions: This study confirms the existence of over-development of brain structure in children with ASD. Increased brain size is an important structural feature of early brain development in children with ASD, which will provide a powerful tool for the early diagnosis and assessment of ASD.]]></description>
<pubDate>Mon,20 Apr 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[The value of collateral vessels on magnetic resonance angiography in the prognosis of stroke patients after mechanical thrombectomy associated with clinical outcomes]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.04.006</link>
<description><![CDATA[Objective: To evaluate the association between the collateral vessels on magnetic resonance angiography (MRA) and clinical outcome in acute stroke patients after mechanical thrombectomy. Materials and Methods: In this prospective study, acute stroke patients who received mechanical thrombectomy therapy were evaluated. All patients underwent head MRI plain scan and MRA examination before therapy and after therapy. Functional outcome at 3 months was assessed by using the modified Rankin Scale (mRS). mRS 0—2 is good functional outcome group and 3—6 is poor functional outcome group. Statistical methods were used to analyze the sylvian fissure and the leptomeningeal convexity differences between two groups. Results: Of 55 patients, cases with insufficient collateral circulation at the sylvian fissure (52) and leptomeningeal convexity (45) showed that the NIHSS score at arrival (10.06±4.65 vs 14.25±4.91; P=0.006) and preoperative infarct volume (13.61±10.99 vs 59.80±92.74; P=0.006) were significantly lower in mRS score of 0—2 than that in mRS score of 3-6. Multivariate testing revealed age and collateral status at the leptomeningeal convexity were independent of the clinical outcome at 3 months after stroke (OR=1.094, 95%CI=1.025—1.168, P=0.007; OR=9.542, 95%CI=1.812—50.245, P=0.008 respectively). The change of infarct volume in the group with mRS score of 0-2 (preoperative vs postoperative: 14.15±10.73 vs 21.39±17.41) was smaller than that with mRS score of 3—6 (preoperative vs postoperative: 16.88±16.64 vs 57.27±56.67). While multivariate logistic models showed that postoperative infarct volume was non-significant in predicting the clinical outcome after stroke (OR=1.094,95%CI=1.025—1.168; P=0.154). Conclusions: MRA can be used to evaluate the functional outcome in patients with stroke, especially the extent of collateral circulation at the leptomeningeal convexity may be useful for predicting the functional recovery. While the relationship between postoperative infarct volume and clinical outcome still requires for further study.]]></description>
<pubDate>Mon,20 Apr 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[Efficiency of 2-hydroxyglutarate quantification by long-echo proton magnetic resonance spectroscopy at 3.0 T in vitro and in vivo]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.04.007</link>
<description><![CDATA[Objective: Mutated isocitrate dehydrogenase (IDH) produce high accumulation levels of 2-hydroxyglutarate (2HG) that can be quantitatively detected by proton magnetic resonance spectroscopy (1H-MRS). Through in vitro and in vivo studies, the purpose of our study was to explore the efficacy of using long-echo (TE) point-resolved spectroscopy (PRESS) MRS to detect 2HG at 3.0 T in clinical setting. Materials and Methods: Two phantoms were set up, the first is a spherical phantom (diameter of about 6 cm plastic ball), which containing a range of known concentrations of 2HG 9 mmol/L, Glutamate (Glu) 12.5 mmol/L, Glutamine (Gln) 12.5 mmol/L, γ-Aminobutyric Acid (GABA) 2.0 mmol/L, N-acetylaspartate (NAA) 12.5 mmol/L, Creatine (Cr) 10.0 mmol/L, Choline (Cho) 3.0 mmol/L; The second includes six cylindrical gradient phantoms (both 60 mL plastic test tubes), and Glu 10 mmol/L, Cr 10 mmol/L, and 2HG 0.5, 1, 2, 4, 8, 16 mmol/L, respectively. Point-resolved spectroscopy (PRESS) sequence with long echo time (TE=97 ms, TE1=26 ms, TE2=71 ms) MRS was used to analyze for all the set phantoms. In addition, combined with T1WI and T1WI enhanced images, long TE PRESS MRS was performed on 4 subjects with suspected diagnosis of low-grade glioma in our study. IDH mutation status obtained by postoperative genetic testing was taken as the gold standard. The absolute concentration values of metabolites were acquired by LC model software fitting. Results: Phantoms results showed that 2HG could be detected effectively when the concentration of 2HG was 2-16 mmol/L. Compared with the real concentration of 2HG, the absolute concentration of 2HG obtained by LC model software was lower, while the concentration ratio of 2HG/Glu was close to the actual ratio. Three subjects were subsequently diagnosed histologically as gliomas, of which 2 were IDH mutant gliomas and 1 was IDH wild-type glioma. By long TE PRESS, the accumulation of 2HG was detected effectively in IDH mutant glioma, while there is no accumulation of 2HG in IDH wild-type glioma. Conclusions: The results of phantoms suggest that 2HG at low concentration can be masked and thus increase the false negative result. However, the ratio of 2HG/Glu is closer to the actual ratio, indicating that it may be more accurate to replace the absolute concentration value with the ratio. Combined with the results of scanning in vivo shows that it was feasible to use long TE PRESS sequence in the conventional glioma imaging protocol to detect 2HG accumulation and indirectly predict IDH mutation status. It is of great significance for the preoperative non-invasive diagnosis, guiding treatment strategy and prognosis evaluation of glioma.]]></description>
<pubDate>Mon,20 Apr 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[Cardiovascular magnetic resonance feature tracking in the quantitative assessment of early left atrial dysfunction in hypertensive patients]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.04.008</link>
<description><![CDATA[Objective: To evaluate the early left atrial (LA) dysfunction in hypertensive patients by using cardiovascular magnetic resonance feature tracking (CMR-FT). Materials and Methods: Thirty patients diagnosed with hypertension in our hospital from January 2012 to December 2013 were consecutively recruited and all patients underwent CMR examinations. Patients with LA enlargement, left ventricular ejection fraction (LVEF) ＜50% and other cardiovascular diseases were excluded. Thirty age- and sex-matched healthy subjects were included as controls. LA strain analysis was performed both on the two- and four-chamber cine images. LA reservoir, conduit and contractile functional parameters including ejection fraction (EF), strain and strain rate were collected respectively. All the clinical and CMR parameters were compared between the two groups. Results: The mean age was 45.93±10.38 yrs, 66.6%(20/30) were males. In hypertensive patients, body surface area, body mass index and resting systolic/diastolic blood pressure were all significantly higher than those of the controls. Similar results were observed in terms of LVEF [(64.08±7.99)% vs (59.89±4.59)%, P=0.018] and LV mass [(61.14±10.59) g/m2 vs (37.93±10.45) g/m2, P＜0.001]. Regarding the LA parameters, there were no significant differences in terms of the LA maximum volume, pre-atrial contractile LA volume and minimum volume index between the two groups. In hypertensive patients, the LA EF and strain in both reservoir and conduit phases were significantly impaired, while no statistical differences were observed in LA contractile parameters. Conclusions: CMR-FT technique could be used to detect LA dysfunction before LA enlargement in hypertensive patients. In those patients, the LA reservoir and conduit function were impaired while the contractile function was preserved.]]></description>
<pubDate>Mon,20 Apr 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[Cardiac magnetic resonance imaging in obstructive sleep apnea-hypopnea syndrome patients]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.04.009</link>
<description><![CDATA[Objective: To investigate the changes of left ventricular function and myocardium in patients with obstructive sleep apnea-hypopnea syndrome (OSAHS), and carry out quantitative analysis of myocardial tissue by cardiac magnetic resonance imaging. Materials and Methods: Twenty-four male patients, aged 40—60 years old, and 25 normal adult male healthy volunteers, aged 40—60 years old, who met the 2011 revised OSAHS diagnostic criteria and were diagnosed as OSAHS after polysomnography (PSG) monitoring were selected. Perform the following sequence scans: Multi-temporal cine sequence based on gradient echo, modified look-locker inversion recovery (MOLLI) sequence contrast agent T1 mapping before injection, T2 mapping based on steady-state free-precession (SSFP), T1 scout sequence and MOLLI sequence contrast agent T1 mapping after injection. Left ventricular functional parameters [left ventricular ejection fraction (LVEF), left ventricular end diastolic volume (LVEDV), end systolic volume (LVESV), stroke volume (LVSV), cardiac output (LVCO), cardiac index (LVCI), left ventricular myocardial mass (LVM)], left ventricular myocardial T1 value, T2 value and ECV value were obtained. Results: (1) Cardiac function related parameters: LVEF, LVEDV, LVSV in OSAHS group were lower than those in normal, LVESV and LVM were higher than that in normal, and the difference was statistically significant (P＜0.05); there was no significant difference in ESV, SV and CO between OSAHS and normal (P＞0.05). (2) Histological parameters: T2 value of middle segment, apex segment and mean of left ventricular myocardium in OSAHS were higher than those in normal, the difference was statistically significant (P＜0.05); the mean pre-contrast T1 and ECV values of left ventricle myocardium in OSAHS were higher than those in normal, but the difference was not statistically significant (P＞0.05). Conclusions: (1) Cardiac magnetic resonance imaging technology can effectively evaluate the cardiac structure, function and the early changes of myocardium of OSAHS patients, which has an important clinical application value; (2) Left ventricular systolic and diastolic functions of OSAHS were both reduced differently degrees and myocardial quality was increased; (3) Acute inflammatory changes of different degrees in left ventricular myocardium of OSAHS occur.]]></description>
<pubDate>Mon,20 Apr 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[Research on IVIM-DWI technique in endocrine treatment effect of prostate cancer]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.04.010</link>
<description><![CDATA[Objective: To explore the value of IVIM-DWI technique in the endocrine therapy of prostate cancer (PCa). Materials and Methods: From November 2017 to January 2019, 49 patients with PCa confirmed by pathology after ultrasound-guided rectal puncture in our hospital were collected, and the patients were selected to adopt a uniform drug endocrine therapy regimen. Before the treatment, 3.0 T conventional MRI plain scan plus enhancement and IVIM-DWI sequence scans with 11 b values (0—3000 s/mm2) were performed to measure the apparent diffusion coefficient (ADCstand), slow apparent diffusion coefficient (ADCslow), fast apparent diffusion coefficient (ADCfast), proportion of fast diffusion (Ffast), distributed diffusion coefficient (DDC), and diffusion heterogeneity index (α). Review of MRI after 6 months treatment, and the patients were divided into effective group (31 cases) and ineffective group (18 cases) according to the treatment effect. Independent sample rank sum test was used to compare the differences of the parameters before treatment between the two groups. And the receiver operating characteristic (ROC) was used to evaluate statistically significant parameters for predicting power, with P＜0.05 as the statistical standard. Results: ADCfast in the effective group was greater than that in the ineffective group (P＜0.05), and Ffast in the effective group was less than that in the ineffective group (P＜0.05). The remaining parameters were not significantly different between the two groups. The area under the ROC curve of ADCfast (AUC) was the largest (0.900), followed by Ffast (0.878). Both had the same sensitivity (96.8%), and the specificity of ADCfast was the highest (83.8%). Conclusions: The double-exponential model ADCfast and Ffast of IVIM-DWI technique before treatment can effectively predict the effect of PCa endocrine therapy, and it can provide a basis for individualized treatment of PCa.]]></description>
<pubDate>Mon,20 Apr 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[Study on metal artifacts reduction by review of MAVRIC-SL sequence after internal fixation of fracture]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.04.011</link>
<description><![CDATA[Objective: Investigate the effect of metal artifact reduction multi acquisition with variable resonance image combination slab selectivity (MAVIRC-SL) sequence on MRI of patients with metal implants after fracture surgery, in order to evaluate its clinical application value. Materials and Methods: Thirty-two patients with metal implants after fracture were recruited. The conventional sequences and MAVRIC-SL were scanned. The degree of artifact and its influence on the diagnosis of surrounding structure, the effect of fat suppression and the diagnostic confidence were compared and analyzed. Results: Compared with the conventional sequences, MAVRIC-SL had smaller metal artifacts and the quality of diagnosis is less damaged [conventional sequences: 5(4, 5)；MAVRIC-SL: 2(2, 3); P＜0.01]; MAVIRC-SL could achieve better fat suppression effect [conventional sequence: 2(1, 2); MAVRIC-SL: 2(2, 3); P＜0.01]; MAVRIC-SL has higher diagnostic confidence [reviewer 1∶3(3, 4); reviewer 2∶3(2.25, 4); κ=0.79]. Conclusions: MAVRIC-SL can effectively reduce metal artifacts and obtain better fat suppression images. It also has higher diagnostic confidence. MAVRIC-SL is more helpful for the diagnosis of bone and joint lesions after internal fixation.]]></description>
<pubDate>Mon,20 Apr 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[Analysis of correlation between FVH-DWI matching and prognosis in patients with  ischemic stroke caused by middle cerebral artery occlusion]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.04.012</link>
<description><![CDATA[Objective: To investigate whether the prognosis of patients with ischemic stroke can be determined by the match between distal vascular hypersignal (FVH) of FLAIR sequence and DWI infarction. Materials and Methods: Thirty-four patients with ischemic stroke with middle cerebral artery occlusion received routine craniocerebral MRI, MRA and DWI scans. According to the relationship between FVH and DWI, they were divided into the FVH-DWI match group and the FVH-DWI mismatch group. Results: There was no statistically significant difference between the FVH-DWI match and FVH-DWI mismatch in mRS score at 90 days and mRS≤2 at 90 days (good prognosis) between the two groups (P＞0.05). Conclusions: The match of FVH-DWI could not predict the clinical prognosis of ischemic stroke patients on 90 days.]]></description>
<pubDate>Mon,20 Apr 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[The value of DCE-MRI combined with DWI in differential diagnosis of breast benign and malignant diseases]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.04.013</link>
<description><![CDATA[Objective: To explore time-signal intensity curve (TIC) type, early enhancement rate and the value of apparent diffusion coefficient (ADC) in differential diagnosis of benign and malignant breast lesions. Materials and Methods: The preoperative magnetic resonance imaging and clinicopathological data of 140 pathologically confirmed breast lesions in our hospital from April 2017 to April 2019 were retrospectively analyzed. The lesions were divided into benign lesion group and malignant lesion group according to the pathology after operation. The difference of TIC curve type and early enhancement rate between benign and malignant breast lesions were compared and the difference of ADC value between the two groups was compared. Results: 140 lesions of 107 patients were included in the study. Three of them had breast cancer and breast fibroadenoma simultaneously, one had ipsilateral breast and two had bilateral breast respectively. 43 benign lesions, 97 lesions of malignant tumors. The TIC curve type, the type of early enhancement rate of benign and malignant breast lesions were significantly different (P＜0.05). The average ADC value of benign lesions was (1.335±0.266)×10-3 mm2/s and that of malignant lesions was (0.965±0.215)×10-3 mm2/s. There was a significant difference between the two groups (P＜0.05). When the threshold value of ADC was 1.085×10-3 mm2/s, the sensitivity, specificity, accuracy and area under the curve of ADC were 73.2%, 86.0%, 77.1% and 0.857 respectively. The sensitivity, specificity and accuracy of TIC curve, early enhancement rate and ADC were 83.5%, 79.1% and 78.5% respectively. The area under the curve of AUC was 0.882, which was higher than that under the curve of other three diagnostic methods (0.728, 0.562, 0.857). Conclusions: The combined diagnosis of ADC value of diffusion weighted imaging, semi-quantitative parameters of dynamic contrast-enhanced imaging (TIC curve type and early enhancement rate of the first stage) is of great value in differential diagnosis of benign and malignant breast lesions.]]></description>
<pubDate>Mon,20 Apr 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[Research progresses of parotid gland MRI in Sjögren<sup><sup>,</sup></sup>s syndrome]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.04.016</link>
<description><![CDATA[Sjögren's syndrome is a systemic autoimmune disease. Salivary gland is one of the main sites involved. The largest pair of salivary glands, the parotid gland, is valuable for the diagnosis of Sjögren's syndrome. Magnetic resonance imaging has high soft tissue resolution and rich technical means, which has its unique advantages in diagnosing Sjögren's syndrome compared with other examinations. This article reviewed the application of parotid gland MRI in the diagnosis of Sjögren's syndrome.]]></description>
<pubDate>Mon,20 Apr 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[New progress of magnetic resonance elastography in diagnosis of liver fibrosis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.04.017</link>
<description><![CDATA[As a new non-invasive magnetic resonance diagnostic technique developed in recent years, magnetic resonance elastography (MRE), which can quantitatively measure the stiffness in living tissue by shear wave. MRE has high sensitivity, specificity and diagnostic performance in staging of liver fibrosis, which behave important clinical value. With the continuous development of MRE technology, hardware and software, there are great progress in the imaging methods, scanning sequences and post-processing of MRE. This paper reviews the advance of this new technology and the recently progress of MRE in staging of liver fibrosis.]]></description>
<pubDate>Mon,20 Apr 2020 00:00:00  GMT</pubDate>
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<title><![CDATA[Advances in imaging studies of severe pancreatitis complicated with abdominal hypertension]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2020.04.018</link>
<description><![CDATA[Abdominal hypertension (IAH) is one of the common complications of severe pancreatitis (SAP). According to the grade of intra-abdominal pressure (IAP) and organ dysfunction, IAH can be divided into abdominal hypertension or abdominal compartment syndrome (ACS). Pathophysiological changes induced by IAH/ACS can lead to multiple organ dysfunction, which is an important factor affecting the progression of SAP and the prognosis of patients. Imaging examination is an indispensable method for the diagnosis of SAP, but the study of its combination with IAH/ACS is limited. This article reviews the current progress and prospects of IAH/ACS in pathogenesis and imaging research, aiming at more accurate assessment of patients' condition and providing more information for clinicians to develop individualized treatment programs.]]></description>
<pubDate>Mon,20 Apr 2020 00:00:00  GMT</pubDate>
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