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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=201707</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
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<title><![CDATA[Degree centrality in different duration of patients with temporal lobe epilepsy]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.07.001</link>
<description><![CDATA[Objective: To study the changes of the level of brain function in patients with temporal lobe epilepsy (TLE), and to explore the relationship between them and the executive function using degree centrality (DC). Materials and Methods: The executive function of 21 patients with disease duration≤5 years, 19 cases of disease＞5 years of TLE patients and 30 healthy controls were studied by using attention network test (ANT). At the same time, the DC values of resting-state functional magnetic resonance imaging (rs-fMRI) were calculated, and the correlation between the DC values of the extracted brain regions and the efficiency of the control reaction was analyzed. Results: The efficiency of the control group was significantly lower than that of the control group (P＜0.05). Compared with the control group, the brain area of the patients with less than 5-year-old group was located in the right hippocampus, and the brain area in the 5-year-old group was located in the right caudate nucleus, the left frontal lobe and the DC increased brain area was located on the left side of the central anterior, central posterior; course of disease＞5 years of patients than the course of ≤5 years of patients with DC increased brain area in the left island leaves. (cluster threshold at P＜0.01, Alphasim corrected). The DC value of the right caudate nucleus in the 5-year group was negatively correlated with the efficiency of the control network (P＜0.05). Conclusions: TLE patients with impaired function, different course of patients with brain area connection intensity (node) are different, different course of patients with executive function and different brain connection, only found in patients with longer course of the brain part of the existence of compensatory effect, and the functional connection intensity of the caudate nucleus is related to the execution function.]]></description>
<pubDate>Thu,20 Jul 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Clinical study of magnetic resonance diffusion kurtosis imaging technology on half dark with acute cerebral infarction diagnosis value]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.07.002</link>
<description><![CDATA[Objective: The purpose of this study was to analyze the clinical value of diffusional kurtosis imaging on diagnosis, prognosis and observation of curative effect of ischemic penumbra. Materials and Methods: Forty-three patients were divided into superacute stage group (n=13), acute stage group (n=14) and subacute group (n=16). All the patients were examined with conventional MRI, DTI, DKI and T2-FLAIR, measured the area of abnormal signal of MK and MD maps. MK values and MD values of the corresponding parts of the mirror side were used as controls. These data were used for statistical analysis. Results: (1) The MD maps of our three groups in the lesion side showed relatively homogeneous low signal with fuzzy edge, in comparison, the MK maps showed heterogeneous high signal with clear edge. (2) In the lesion, the increase in the MK value, decrease in the MD value was different from that of the reference side (P＜0.01). (3) The lesion area (mm2)in the MK map was obviously smaller than that in the MD map, with their difference being the mismatch area. The mismatch occurrence rate were 86.4%, 92.8%, 75.0% respectively in superacute, acute and subacute group. (4) ∆MK was apparently greater than ∆MD in the lesion. (5) MK, MD, ∆MK, ∆MD value in the match area varied a lot more than that of the mismatch area. (6) The lesion area in the MK and MD map and the MK and MD value positively correlated to the severity of ischemia evaluated by NHISS. (7) Fourteen cases were followed up with T2-FLAIR: ① Compared with the primitive MK map: ten cases showed almost the same lesion area, indicating good curative effect, 4 cases showed severely enlarged lesion area, indicating poor clinical outcome. ② Compared with the primitive MD map: ten cases showed smaller lesion area, indicating good curative effect, 2 cases showed the same lesion area, indicating stable clinical state, 2 cases showed significantly enlarged lesion area, indicating poor clinical outcome. Conclusions: DKI was able to differentiate infarct and ischemic area separately in ischemia, and it played an important role in detecting penumbra. Moreover, it could be used to evaluate the severity of ischemia and the curative effect if the patients were followed up with this technique in the long term.]]></description>
<pubDate>Thu,20 Jul 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[The apply value of apparent diffusion coefficient in the differential diagnosis between cortex-involved gliomas and subacute cerebral infarction]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.07.003</link>
<description><![CDATA[Objective: To investigate the value of apparent diffusion coefficient (ADC) in the differential diagnosis between cortex-involved gliomas and subacute cerebral infarction. Materials and Methods: The MRI data including convention MRI and diffusion weighted imaging (DWI) from 24 cases with cortex-involved gliomas confirmed by pathology and 24 cases with subacute cerebral infarction treated by formal medical therapy were retrospectively analyzed. Compare the ADC value of the solid part of cortex-involved gliomas, the central part of subacute cerebral infarction and normal brain tissue. Results: Twenty-seven lesions were detected in 24 cases with cortex-involved gliomas. There were 10 cases with low-grade gliomas and 14 cases with high-grade gliomas. On DWI, tumor substantial part showed slightly higher or medium signal intensity and necrotic area was significantly lower signal intensity. The mean ADC value of tumor substantial part was (1.21±0.16)×10-3 mm2/s. The mean ADC value of low-grade gliomas was (1.28±0.17)×10-3 mm2/s, and that of high-grade gliomas was (1.01±0.22)×10-3 mm2/s, and mean ADC value of corresponding contralateral normal area was (0.84±0.07)×10-3 mm2/s, there was significant difference in ADC values between cortex-involved gliomas and nomal tissue (P＜0.05). Subacute cerebral infarction appeared as hyper-intensity on DWI, the mean ADC value was (0.49±0.07)×10-3 mm2/s. There was significant differences in ADC value between cortex-involved glioma and subacute cerebral infarction (P＜0.05). Conclusions: It is of significant value to combine ADC value, DWI, conventional MRI appearance and contrast-enhanced appearance in differentiating diagnosis of cortex-involved glioma from subacute cerebral infarction.]]></description>
<pubDate>Thu,20 Jul 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Morphological type of torcular herophili and drainage dominant of internal jugular vein using 3D CE-MRA]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.07.004</link>
<description><![CDATA[Objective: To explore the imaging anatomy of torcular herophili and drainage dominant of internal jugular vein (IJV). Materials and Methods: A total of 1204 patients [749 men, 455 women, age range, 14—84 years, mean age, (65.11±11.99) years] were included. Venous phase scanning was performed immediately after head and neck arterial phase scanning on 3 dimensional contrast enhanced magnetic resonance angiography (3D CE MRA). Transverse sinus (TS) and IJV drainage dominant types were observed with maximum intensity projection (MIP) images. Morphological types of the torcular herophili regions were classified. Results: Of the 1204 subjects, TS was found to be right, left, and codominant in 51.91%, 14.95%, and 33.14% of the cases, respectively. According to anatomic features, torcular herophili regions were classified into 4 types: simple confluence type (14.20%), double bifurcation type (31.48%), dural venous sinuses deviation type (51.66%) and occipital sinus (OS) type (2.66%). The third type was subdivided into 3 subtypes according to the different deviations of the superior sagittal sinus (SSS) and the straight sinus (SS). Of the 1162 subjects, IJV was found to be right, left, and codominant in 53.70%, 17.38%, and 28.92% of the cases, respectively. Conclusions: The morphological type of torcular herophili is rather complicated. In the different types of TS, the drainage form of IJV is consistent with that of TS drainage.]]></description>
<pubDate>Thu,20 Jul 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[The study of relation between size of transverse sinus by MRV and pressure of eyes]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.07.005</link>
<description><![CDATA[Objective: The purpose of this study was to investigate possible relationships between the asymmetry of transverse sinuses in CE-MRV and intraocular pressures of right and left eyes. Materials and Methods: In this study, subjects were 53 male and 52 female volunteers. Subjects with neurological and ophthalmologic disease, particularly dural sinus thrombosis, myopia, trauma and glaucoma, were excluded in the study. Subjects were divided into five groups according to the magnitudes of the right- and left-transverse sinuses in MR venography results. Group Ⅰ: L＞＞R. L significantly greater than R. Group Ⅱ: L＞R, L greater than R. Group Ⅲ: L=R, the left and right sides are basically similar. Group Ⅳ: L＜R, L smaller than R. Group Ⅴ: L＜＜R, L significantly smaller than R. The pressure of the eyes was been measured respectively. Results: The difference between percentages of subjects in group Ⅰ, Ⅱ and Ⅴ was statistically significant (P＜0.05). The differences in the mean intraocular pressures of right and left eyes were statistically significant (P=0.04). There were inverse Pearson correlations between asymmetry index of transverse sinus and intraocular pressure of the right eye (r=0.51, P＜0.01), but was not significant correlation between asymmetry index of transverse sinus and intraocular pressure of left eye (r=0.32, P=0.09). Conclusions: There is a relation between intraocular pressures of the right and left eyes and asymmetry of the transverse sinus. If the right transverse sinus on one side is larger and its venous drainage is greater, the intraocular pressure of the eye on this side is lower.]]></description>
<pubDate>Thu,20 Jul 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[The quantitative study of dynamic contrast enhanced magnetic resonance in differentiating malignant and benign pulmonary lesions]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.07.006</link>
<description><![CDATA[Objective: To estimate the diagnostic accuracy of dynamic contrast enhanced magnetic resonance (DCE-MR) images in the differential diagnosis between malignant and benign lung lesions. Materials and Methods: A total of thirty patients (male 13, female 17) with the presence of a newly detected solitary pulmonary lesion on CT, which was a solid nodule and needed further evaluation were included. All subjects were examined and underwent DCE-MR with CDT-VIBE. Ktrans、Kep、Ve and iAUC were calculated using the modified Tofts model. Results: In this study, 17 benign pulmonary lesions and 13 malignancies were found. The longest transverse diameter measured ranged from 1.1 to 5.3 cm. Malignancies had significantly higher Ktrans, Kep, iAUC than the benign lesions (P＜0.05). The results of the ROC analysis showed AUC values for Ktrans (0.988), Kep (0.756), iAUC (0.806). Conclusions: Dynamic MR imaging reveals significant Ktrans, Kep, iAUC differences in perfusion between malignant and benign pulmonary lesions.]]></description>
<pubDate>Thu,20 Jul 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Quantitative MR imaging study of association between lumbar vertebral endplate Modic changes and intervertebral disc degeneration]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.07.007</link>
<description><![CDATA[Objective: To investigate the relationship between vertebral endplate Modical changes and adjacent intervertebral disc degeneration. Materials and Methods: Lumbar structure and quantitative MR images of 66 patients were retrospectively analyzed. Disc degeneration was semi-quantitatively assessed using Pfirrmann grading system and quantitatively assessed using T2 and T2* values. Association between Pfirrmann scores, T2 and T2* values of intervertebral discs with adjacent endplate Modic changes was analyzed. Results: Nineteen intervertebral discs with adjacent endplate Modic changes were detected in fourteen patients (14/66, 21.2%), which included 2 discs with Modic type 1 changes and 17 discs with type 2 changes. Pfirrmann scores of the discs adjacent to normal endplates, Modic type 1 endplates and Modic type 2 endplates were 2.40±0.96、4±1.41 and 4.12±1.27, respectively. T2 values were (95.38±51.88) ms, (70.50±36.06) ms and (58.65± 38.47) ms. T2* values were (34.43±19.16) ms, (24.00±1.41) ms and (28.65±23.00) ms. The differences of disc Pfirrmann scores, T2 and T2* values among different endplate changes were statistical significant with P values of 0.000, 0.000 and 0.023, respectively. Comparing to discs adjacent to normal endplates, discs adjacent to Modic type 2 endplates had severe degeneration with increased Pfirrmann scores and decreased T2 and T2* values. The differences were statistical significant (P values were 0.000, 0.000 and 0.006, respectively). Conclusions: Modic changes of vertebral endplate are associated with adjacent intervertebral disc degeneration.  Both of them should be regarded as a facet of the "whole-organ" pathologic conditions in the procession of spinal degeneration.]]></description>
<pubDate>Thu,20 Jul 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Multiple exponential models of diffusion weighted imaging in differentiating hepatocellular carcinoma from hepatic hemangioma]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.07.008</link>
<description><![CDATA[Objective: To evaluate the feasibility of the monoexponential model of diffusion-weighted imaging (DWI), biexponential and stretched-exponential models of intravoxel incoherent motion (IVIM) and to compare the optimization in these models in differentiating hepatocellular carcinoma (HCC) from hepatic hemangioma (HH). Materials and Methods: Sixty-six patients under MR liver scanning were retrospectively enrolled in our hospital. All the patients were performed MRI exams on a 1.5 T scanner. For each region of interested (ROI), the mean values of DWI (ADC), eDWI (Standard ADC, D-mono, D*-mono, fmono, D-Bi、D*-Bi、fBi) and HB DWI (DDC, α) were measured. Results: The ADC, Standard ADC, D-mono, D*-mono, fmono, D-Bi, D*-Bi, fBi, DDC values of HCC and HH were statistically significant (P＜0.05). The area under the ROC curve of ADC, Standard ADC, D-mono, fmono, D-Bi were higher than 0.9. The differential diagnostic efficiency with Standard ADC were significantly better than ADC. The differential diagnostic efficiency with ADC was significantly better than D*-Bi, fBi, HB DDC. Conclusions: The values of ADC, Standard ADC from monoexponential model, D-mono, fmono, D-Bi from double monoexponential model have favorable effective functions for the diagnosis, Standard ADC from monoexponential model with multiple b values were significantly better than ADC from monoexponential model with single b value in differential diagnosis of hepatocellular carcinoma and hepatic hemangioma.]]></description>
<pubDate>Thu,20 Jul 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[MitoQ protects rodent kidneys from ischemia-reperfusion injury: observations with DWI]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.07.009</link>
<description><![CDATA[Objective: To investigate the effect of the mitochondria targeted antioxidant MitoQ in protecting from renal ischemia-reperfusion injury (IRI) in rats by longitudinal observation on apparent diffusion coefficient (ADC) values of the kidney measured with diffusion-weighted imaging (DWI). Materials and Methods: Renal IRI was induced by temporarily clamping the left renal artery for 45 minutes and then reperfusion was realized. Ten male Sprague–Dawley rats were randomly divided into two groups: MitoQ group (n=5, IRI+MitoQ) and control group (n=5, IRI+saline). DWI was performed just before the operation (day 0) and on day 2, 5, 7 and 14 after the operation. ADC value of the outer stripe of the outer medulla (OSOM) was measured on bilateral kidneys. Renal histopathology damage score was evaluated after the final MRI examination. Inter- and intra- group differences were assessed using the Least Significant Difference (LSD). Kruskal-Wallis H test and Mann-Whitney U test were used for histopathology damage score analysis. Results: The ADC values of the kidneys in two groups on day 0 had no statistical significance. The ADC values of the left OSOM dropped dramatically after IRI in both of the groups, and it was more obvious in control group. The ADC values of the OSOM on IRI kidneys were lower than their counterparts (P＜0.01), and the ADC values of the OSOM in control group were even lower than that in MitoQ group Day 2, the left OSOM on MitoQ group and control group: (3.66±0.29)×10-4 mm2/s. (3.09±0.39)×10-4 mm2/s, P＜0.05. Day 5, the left OSOM on MitoQ group and control group: (3.75±0.32)×10-4 mm2/s, (2.95±0.79)×10-4 mm2/s, P＜0.05. Day 7, the left OSOM on MitoQ group and control group: (3.77±0.42)×10-4 mm2/s, (2.98±0.49)×10-4 mm2/s, P＜0.05, Day 14, the left OSOM on MitoQ group and control group: (3.93±0.23)×10-4 mm2/s, (3.05±0.20)×10-4 mm2/s, P＜0.05. Renal histopathology analysis showed that renal damage was the most predominant on the OSOM of IRI kidneys in control group, whose histopathology damage scores were significantly higher than those in MitoQ group (P＜0.01). Conclusions: DWI could be a noninvasive method to evaluate the effect of MitoQ on reducing renal IRI in rats.]]></description>
<pubDate>Thu,20 Jul 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Mechanism changes of cognitive function and advances of structural and functional MRI in neuropsychiatric lupus]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.07.012</link>
<description><![CDATA[Central nervous system involvement in 25%—75% of systemic lupus erythematosus (SLE) patients, especially the brain, can produce a variety of neuropsychiatric symptoms. There is evidence that changes in olfactory and cognitive function may be earlier than the occurrence of neuropsychiatric symptoms, contributing to the early diagnosis of lupus encephalopathy. In recent years, various functional MRI (fMRI) techniques have important value for the diagnosis and evaluation of systemic lupus erythematosus and the occurrence and development of disease. This article reviews the changes in olfactory and cognitive aspects of patients with systemic lupus erythematosus and the application of structural and functional MRI.]]></description>
<pubDate>Thu,20 Jul 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Research progress of etiology and related magnetic resonance imaging in trigeminal neuralgia]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.07.013</link>
<description><![CDATA[Trigeminal neuralgia is the most common form of cranial neuropathy. Its possible etiology, pathogenesis and pathological changes have not been clearly identified and confirmed.Fusion imaging technology can more accurately assess the relationship between trigeminal nerve and adjacent vessels, more intuitive guidance related surgery. The application of functional magnetic resonance imaging plays an important role in understanding the pathogenesis of trigeminal neuralgia and evaluating prognosis. This article aims to review its etiology and related MRI research progress.]]></description>
<pubDate>Thu,20 Jul 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Progress of cine magnetic resonance imaging in uterine peristalsis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.07.014</link>
<description><![CDATA[Uterine peristalsis is one of the ways that the inherent contractility of the uterus, and its moving direction, frequency and intensity change with the different menstrual cycles which has corresponding clinical significance. With the progress of the detection methods of the uterine peristalsis. Cine magnetic resonance imaging (cine-MRI) is a new dynamic way to study the uterus morphology and function. Its optimal parameters continue to study in depth, and there is no unified standard. There were some literature about the uterine abnormal peristalsis caused by adenomyosis, intrauterine adhesion, fibroid and so on, with important significance for the treatment and prognosis of the diseases. The progress of cine-MRI in evaluation of uterine peristalsis were reviewed in the article.]]></description>
<pubDate>Thu,20 Jul 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Application and development of diffusion-weighted imaging and dynamic contrast-enhanced MRI in endometrial carcinoma]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.07.015</link>
<description><![CDATA[Diffusion-weighted imaging (DWI) and dynamic contrast-enhanced MRI (DCE-MRI), the normal functional imaging techniques, are used in reflecting biological characteristics and clinical course in primary endometrial carcinoma, by analyzing the value of apparent diffusion coefficient (ADC) and quantitative or semi-quantitative perfusion parameters of DCE-MRI, which are crucial to preoperative assessment, the potential consequences of therapy and the outcome of endometrial carcinoma patients. The aim of this study was to review the application and development of DWI and DCE-MRI in endometrial carcinoma.]]></description>
<pubDate>Thu,20 Jul 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Research advances in reduced field of view diffusion weighted imaging]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.07.016</link>
<description><![CDATA[Diffusion-weighted imaging (DWI), as a kind of functional imaging technique, is an important complement to the conventional MRI in imaging diagnosis. However, the most common technique is full field of view diffusion weighted imaging (fFOV-DWI), which has some defects that cannot be ignored, such as poor image quality, low resolution of anatomical structure and serious artifact. With development of technology, reduced field of view diffusion weighted imaging (rFOV DWI) avoids the need to encode a large extent in the phase-encode direction, shortens the echo train and reduces off-resonance-induced artifacts in single-shot echo-planar imaging (ssEPI), resulting in significantly improved image quality. This review focuses on the theory and clinical research advances of rFOV DWI in the various organs for imaging diagnosis.]]></description>
<pubDate>Thu,20 Jul 2017 00:00:00  GMT</pubDate>
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