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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=201503</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
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<title><![CDATA[Spontaneous brain activity alterations in T2DM patients with mild cognitive impairment: a resting-state fMRI study]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.03.001</link>
<description><![CDATA[Objective: To investigate the patterns of spontaneous brain activity alterations in type 2 diabetes mellitus (T2DM) with mild cognitive impairment (MCI) by analyzing the regional homogeneity (ReHo) and fractional amplitude of low-frequency fluctuations (fALFF). Materials and Methods: T2DM with MCI (D-MCI,   n=21) and age-, sex-, and education-matched healthy control subjects (HC, n=25) were included in this study. T2WI, FLAIR, 3D-T1WI and resting-state fMRI data were collected by Siemens 3.0 T Trio MR scanner. ReHo and fALFF values were calculated respectively for intra-group and inter-group t-tests. Then correlation analysis were conducted between clinical data and ReHo/fALFF values extracted from significantly different brain regions. Results: Compared to healthy control subjects, D-MCI patients showed significantly increased ReHo values in most of the right superior frontal gyrus and partial left cerebelum areas, and decreased ReHo values in bilateral medial orbital part of superior frontal gyrus, right middle frontal gyrus, right inferior temporal gyrus, left middle occipital gyrus and right lingual gyrus. D-MCI patients also had increased fALFF values in left inferior temporal gyrus and bilateral anterior cingulate gyrus, and decreased fALFF values in right lingual gyrus. Moreover, inverse correlations were found between HbA1c and fALFF values of anterior cingulate gyrus (r=－0.482, P=0.027), MoCA scores and fALFF values of left inferior temporal gyrus (r=－0.547, P =0.010) in D-MCI group. Conclusions: D-MCI patients developed aberrant functional activities among brain regions associated with cognitive control network and visual processing. It may partially interpret the neural substrates in the progress of MCI for T2DM patients.]]></description>
<pubDate>Fri,20 Mar 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Diagnosis of intracranial choroidal fissure cyst of using MRI]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.03.002</link>
<description><![CDATA[Objective: To investigate the magnetic resonance imaging (MRI) manifestations and diagnostic value in patients with choroidal fissure cyst in the brain.  Materials and Methods: MRI appearance and clinical data of 28 patients with choroidal fissure cyst were analyzed retrospectively. Results: All of the 28 choroidal fissure cysts were shown in axial, sagittal and coronal planes explicitly, but best displayed in coronal plane 24 (85.71%) of them were seen in the right hemisphere, with a significant higher frequency than the left hemisphere (P<0.05). The cysts were situated within the choroidal fissure in all cases, and all cases were single, with clear boundary, no associated edema, and showed no enhancement in Gd-DTPA enhanced MRI scan. Conclusions: MRI has characteristics of multi-parameter, multi-sequence imaging, not only can confirm the diagnosis of choroidal fissure cyst but also can differentiate the choroidal fissure cyst from other cystic lesions.]]></description>
<pubDate>Fri,20 Mar 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Cine-PC MRI in the evaluation of cerebrospinal fluid flow dynamics]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.03.003</link>
<description><![CDATA[Objectives: Motion of the cerebrospinal fluid (CSF) in aqueduct of sylvius was examined in volunteers and a number of patients with abnormalities of the CSF circulation with MRI in phase contrast cine mode (Mm cine PC). Materials and Methods: Control group 30 cases  hydrocephalus group 16 cases on a Philips Achieva 3.0 T X-series MRI unit were displayed. Quantitative evaluation of CSF flow via phase reconstruction permits a more precise mapping of the intracranial and intraspinal flow patterns is more sensitive in detecting fluid motion and allows calculation of CSF velocity and flow volume. Results: Aqueduct cerebrospinal fluid of control group is associated with cardiac pulsation the flow type of control group is bi-directional flat rhythmic flow. In control group ,the cerebrospinal fluid flow curve was the smooth inverted u" type ,and in hydrocephalus group the curve was wave type. The average CSF flow of the head and foot side in the control group were (0.0311+0.0201) ml/s and (0.0366+0.0196) ml/s, the velocities were (4.027+1.174) cm/s, (4.107+1.433) cm/s, respectively. In hydrocephalus group, the average CSF flow of the head and foot side were (0.0070+0.0069) ml/s and (0.0078+0.0044) ml/s, the velocities were (0.550+0.327) cm/s, (0.606+0.599) cm/s respectively. The comparisons of the average flow velocity between two groups have statistics meaning (P<0.05). Conclusions: Cine PC MRI, is capable of demonstrating both normal and abnormal intracranial and intraspinal CSF flow. Such a study can be easily added as an extra pulse sequence at the end of a routinely acquked MR exam.]]></description>
<pubDate>Fri,20 Mar 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[2D-TOF MR and 3D-CE MRA scan method of intracranial venous sinus comparison study]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.03.004</link>
<description><![CDATA[Objective: To study the comparison of 2D-TOF MRA and 3D-CE MRA in intracranial venous sinus, comparing the advantages and disadvantages of two kinds of scanning method. Materials and Methods: In our hospital between October 2013 and March 2014, we randomly selected 100 cases intracranial venous blood vessel imaging (at the same time using 2D-TOF MRA with 3D-CE MRA) through analyzing the patients. We comprehensively evaluate the ability of 2D-TOF MRA technology and 3D-CE MRA technology on the display of intracranial venous sinus in order to correctly select a method of intracranial venous sinus to get better display effect. Selection criteria: 1 to display the intracranial venous sinus shape better, and the connection way of torcular region. 2 to display the intracranial venous sinus lesions better, reflect the application value in the intracranial lesions. 3 to considerate the patient's own conditions and economic conditions, choose the appropriate scanning method. Results: 2D-TOF MRA can clearly show the intracranial venous sinus 50 cases, and the other 50 cases were failed to be showed clearly. 3D-CE MRA can clearly show 84 cases, fail to show clearly 16 cases, comparison between 2D-TOF MRA and 3D-CE MRA has statistical significance (χ2= 26.142, P=0.001). The accuracy 
rate of 2D-TOF MRA in the diagnosis of intracranial venous sinus disease was 88% (88/100), the sensitivity was 66.7% (16/24) and specificity was 94.7% (72/76), positive predictive value and negative predictive values were 80% (16/20), 90% (72/80). The accuracy rate of 3D-CE MRA in the diagnosis of intracranial venous sinus disease was 92% (92/100), the sensitivity was 75% (18/24) and the specificity was 97.4% (74/76), positive predictive value and negative predictive value were 81.8% (18/22), 92.5% (74/80). Conclusions: 3D-CE MRA was able to clearly display and diagnose intracranial venous sinus, and better than 2D-TOF MRA in the transverse sinus and sigmoid sinus display, but the use of comtrast agents in 3D-CE MRA makes its risks and costs increase.]]></description>
<pubDate>Fri,20 Mar 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[The diagnosis value of susceptibility-weighted imaging in cerebral ischemic stroke]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.03.005</link>
<description><![CDATA[Objectives: To explore the diagnosis value of susceptibility-weighted imaging (SWI) in cerebral ischemic stroke. Materials and Methods: Thirty cases with acute infarction were imaged with conventional MRI, DWI and SWI. Twenty of thirty cases were examined with MRA 19 cases were examined with postcontrast MRI after injection of Gd-DTPA. The raw data of SWI were transferred to the advantage workstations AW 4.4 which were generated  the corrected phase image (CPI) and the minimum intensity projection. The corrected phase (CP) values were obtained manually at the infarction or edema and control regions. Results: Thirty  cases with acute infarction were shown hyper-intensity on DWI. 15 cases were shown stenosis or occlusion of anterior cerebral artery middle cerebral artery (MCA) and  posterior cerebral artery on MRA. Five cases showed right MCA clots consisted with the broken region of MRA on SWI. SWI showed hemorrhage of 21 in 30 cases (while CT, n=9. Only T1WI, n=2). 24 cases showed abnormal cerebral veins distribution in infarction area (increased in 15 cases, decreased in 9 cases). The average CP values of the infarction and the control area were －0.021±0.006 and －0.006±0.005, respectively (t =2.167，P<0.05). The average CP values of the edema and the control area were －4.853±0.005 and －1.868±0.003, respectively (t =－2.172，P<0.05). Conclusions: SWI has more predominant advantages than conventional MRI in detecting cerebral infarction accompanying hemorrhage and vein structure. And the corrected phase image (CPI) can be quantitatively analyzed.]]></description>
<pubDate>Fri,20 Mar 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Comparing cardiac magnetic resonance with echocardiogram on diagnosis of apical hypertrophic cardiomyopathy]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.03.006</link>
<description><![CDATA[Objective: To discuss the character of cardiac magnetic resonance and echocardiogram findings of apical hypertrophic cardiomyopathy (AHCM), and evaluate the diagnostic value of CMR and echocardiogram in AHCM. Materials and Methods: Twenty-one patients (male 16, female 5) with AHCM underwent Cardiac Magnetic Resonance, echocardiogram, ECG and coronary angiography. Results: The cardiac magnetic resonance revealed apical hypertrophic in all the patients. Among them, 13 patients  were pure form P-AHCM, 1 patient was pure form T-AHCM, 1 patient was mixed form P-AHCM, and 6 patients were mixed form T-AHCM. Magnetic resonance imaging showed “ace of spades” morphology of the left ventricle in all the T-AHCM patients. Four patients underwent myocardial contrast enhancement MR scanning: 3 patients presented LGE, 2 patients presented myocardial ischemia, and 2 patients presented myocardial infarction. Echocardiography provided correct diagnoses in 6/21 patients (28.6%), while in 10 patients echocardiographic results were normal. All of our patients showed electrocardiographic alterations of the ventricular repolarization: 14 patients (67.7%) with LV high voltage. Seventeen patients (80.9%) with giant negative T waves. Sixteen patients (76.2%) with a significant descending ST segment. Four patients had arrhythmia in different degrees. Conclusions: MR has higher sensitivity in diagnosing AHCM than echocardiogram. The ECG is a helpful tool to screen AHCM. To the patients who is suspected of AHCM, cardiac magnetic resonance could make a definite diagnosis.]]></description>
<pubDate>Fri,20 Mar 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[The bypass sign of main pancreatic duct: a significant MRI sign of pancreatic neuroendocrine tumors]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.03.007</link>
<description><![CDATA[Objective: To investigate the clinic value of the bypass sign of main pancreatic duct for pancreatic neuroendocrine tumors. Materials and Methods:          Twenty-six patients with pancreatic neuroendocrine tumor and 58 patients with pancreatic cancer confirmed by pathology between January, 2000 to January, 2014 in our hospital were retrospectively studied. All MRI images were reviewed for the characteristics and the signal intensity of tumors, and the relationship between tumor and main pancreatic duct. Results: For 26 patients with pancreatic neuroendocrine tumor, the maximum diameter of these tumors and main pancreatic duct was (4.2±2.6) cm (0.8—9.0 cm) and (2.1±1.1) mm (1—4 mm), respectively. On MRI, the bypass sign of main pancreatic duct was seen in 76.9% (20/26). The rate of main pancreatic duct dilation was 19.2% (5/26). Based on the bypass sign of main pancreatic duct, the sensitivity, specificity, and accuracy was 76.9% (20/26), 100% (58/58), and 92.8% (78/84) for diagnosis of pancreatic neuroendocrine tumor, respectively. Conclusions: The bypass sign of main pancreatic duct is a significant MRI sign for diagnosis of pancreatic neuroendocrine tumor.]]></description>
<pubDate>Fri,20 Mar 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Evaluation of 1H-MRS in detecting active sacroiliitis in patients with axial spondyloarthritis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.03.008</link>
<description><![CDATA[Objective:  To evaluate the value and characteristics of proton magnetic resonance spectroscopy (1H-MRS) in detecting active Sacroiliitis in patients with axial Spondyloarthritis (SpA). Materials and Methods: 1H-MRS and conventional MRI examinations were done oblique coronary on bilateral SIJs of 21 participants, involving 10 patients (the case group, including active a.nd inactive case groups) underwent clinical and conventional MRI evaluation for axial SpA active sacroiliitis and 11 healthy volunteers (the control group). The conventional MRI images were transmitted to two experienced radiologists respectively to read, evaluate at the workstation under the blind method. The spectrum image analysis was carried out with the LCModel software, and water to lipid ratio (WLR) was calculated for statistical analysis. Results: 1H-MRS spectra of the sacroiliac joints shows several metabolite peaks: the peak around 0.9 ppm is from the methyl protons, the 1.3 ppm, 1.6 ppm and 2.0 ppm are assigned to the methylene protons of the lipid chain, the 5.2 ppm is from the olefinic protons, and the water peak is at 4.7 ppm. The area under the water peak and the major lipid peak were used to calculate water to lipid ratio (WLR). The mean value of WLR were compared from all the three groups (active case group, 1.71±1.14, inactive case group, 0.43±0.08, and healthy control group, 0.42±0.23). The WLR of active case group were higher than both the inactive case group and the healthy control group, and the differences were statistically significant(Z=－4.46, －2.92, all P<0.05). However, the WLR between the inactive case group and the healthy control group was similar with no significant difference(Z =－0.87, P>0.05). Conclusions: 1H-MRS can quantify the bone marrow edema of sacroiliitis based on the conventional MRI, which maybe a new noninvasive method of assessing the activity of sacroiliitis.]]></description>
<pubDate>Fri,20 Mar 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Imaging feature of intraspinal primary Rosai-Dorfman disease on magnetic resonance imaging: a report of four cases]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.03.009</link>
<description><![CDATA[Objective: Investigating the features of intraspinal primary Rosai-Dorfman disease in MRI. Materials and Methods: The MRI features of four cases which were confirmed Rosai-Dorfman disease histologically were retrospectively evaluated and the literatures about intraspinal primary Rosai-Dorfman disease were reviewed. Results: Four cases were taken MRI examination in spine: two cases showed abnormal signals in cervical spinal canal, one case in thoracic spinal canal and one case in sacral spinal canal. All cases showed mass effect located in subdural-extramedullary spine on MRI, closely associated with spinal dura mater. All of the four cases showed  iso-intensity on T1WI and T2WI. Three  cases were significantly enhanced and one case was slightly enhanced after injection of contrast medium. The intensity of enhancement in abnormal mass was less in comparison with that of spinal dura mater. The mass was diffusely located in cervical spinal canal in one case. Conclusions: The possibility of intraspinal primary Rosai-Dorfman disease should be considered for differentiation in case of single or diffuse mass closely associated with spinal dure mater on MRI. Magnetic Resonance Spectroscopy may be helpful in diagnosis.]]></description>
<pubDate>Fri,20 Mar 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Comparative study of pancreatic fat content between newly-diagnosed patients with type 2 diabetes and healthy volunteers by chemical shift magnetic resonance imaging]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.03.010</link>
<description><![CDATA[Objective:  To compare pancreatic fat content between newly-diagnosed patients with type 2 diabetes and healthy volunteers by chemical shift MRI, and explore their correlations with hepatic fat content. Materials and Methods: Seventy patients with newly-diagnosed type 2 diabetes and BMI、gender and age matched 31 healthy volunteers were recruited in this study. Fat content in the pancreas and liver was respectively measured, calculated, and compared with the sequence of double-echo chemical shift gradient-echo magnetic resonance imaging. The correlation between liver and pancreatic fat content was analyzed. Results: The average fat content of the liver and pancreas in patients with newly-diagnosed type 2 diabetes were higher than that in the healthy volunteers. Hepatic and pancreatic fat fraction were 9.87%±3.19% and 7.24%±2.38% (t=－4.56, P<0.05), as well as 5.15%±3.75% and 3.48%±1.97% (t=－3.01, P<0.05),respectively, in the two groups, and statistically significant differences among them were obvious. Correlation coefficients in the two samples of liver and pancreatic fat content were 0.053 (P>0.05) and 0.337 (P>0.05), both of them were not correlated each other. Conclusions: Hepatic and pancreatic fat content in newly-diagnosed patients with type 2 diabetes were higher than that of healthy volunteers, and the pancreatic and hepatic fat content were not correlated in the two groups.]]></description>
<pubDate>Fri,20 Mar 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Diagnostic value of whole body diffusion weighted imaging in malignant lymphadenopathy]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.03.011</link>
<description><![CDATA[Objective: To study the value and significance of the body diffusion-weighted imaging in the diagnosis and differential diagnosis between lymphoma and lymph node metastases. Material and Methods: Select 25 cases of clinically diagnosed lymphoma patients, 20 patients with lymph node metastases, and 15 healthy volunteers as control group, all lines of WB-DWI imaging and T2 fat suppression shaft can scan, record ADC values of all abnormal lymph nodes and the lymph nodes in the normal control group, the lymphoma group and the normal group, lymph node metastasis group and the normal group, lymphoma group and metastasis between groups ADC value two two comparison, to investigate whether the ADC value has significant differences in the diagnosis and differential diagnosis of malignant lymph node lesions. Try to determine the best differential diagnosis OT between lymphoma and lymph node metastasis under the receiver-operating characteristic curve (ROC curve) analysis. Results: Lymphoma group ADC value was (0.70±0.13) mm2/1000 s, lymph node metastasis group ADC value was (0.94±0.14) mm2/1000 s, normal control group ADC value was (1.23±0.24) mm2/1000 s, with the independent sample t test, lymphoma group with lymph node metastasis between groups ADC value with statistical significance (t=－16.395, P<0.05), lymphoma group and normal control group ADC value with statistical significance (t=－14.876, P<0.05), lymph node metastasis group and normal control group with statistical significance (t=－7.851, P<0.05). By ROC curve we obtained that when the ADC value was 0.79, AZ value was 0.910, which corresponds to the sensitivity 90.3%, specificity 80.6%, this time accurate index was the highest and the diagnostic efficacy best. Conclusions: Whole body diffusion weighted imaging has a good application prospect in diagnosis of systemic malignant lymphadenopathy, through quantitative analysis of ADC value can provide the reference basis for the distinction between the two.]]></description>
<pubDate>Fri,20 Mar 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Research progress of diffusion tensor imaging in gliomas invasion]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.03.013</link>
<description><![CDATA[Gliomas are the most common intracranial neoplasm of central nervous system, most of which are malignant tumors. The heterogeneities of  their infiltration and epigenetics contribute to lack of effective treatment and unfavorable prognosis. In recent years, the applications of DTI technique to glioma grading, infiltration and epigenetics have gained much progress, the latest researches of which were reviewed.]]></description>
<pubDate>Fri,20 Mar 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Advances in imaging of tumefactive demyelinating lesions]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.03.014</link>
<description><![CDATA[Tumefactive demyelinating lesions (TDLs) is a rare and intriguing form of central nervous system demyelinating disorder. It is often misdiagnosed as intracranial gliomas, lymphoma, etc. Thus correct diagnosis can avoid unnecessary surgery and radiotherapy damage. This article aims to review the imaging advances of TDLs and to propose an approach to differential diagnosis of this disease.]]></description>
<pubDate>Fri,20 Mar 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Application of SPIO and 19F probes in magnetic resonance imaging to track in vivo immune cells]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.03.015</link>
<description><![CDATA[The increasing confinement of in vivo imaging technologies, combined with the development of emerging cell therapies, has led a revolution in the field of immune cell tracking in vivo. With the rapid improvement of SPIO- and 19F-based probes, range of magnetic resonance imaging (MRI) application is broadened. For example, MRI technologies have been introduced to image-guided immune cell delivery, and he visualization of immune cell homing and implantation, inflammation, and cell physiology. MRI-based cell tracking technologies have been widely used to follow the fate of immune cells in vivo, or evaluate the effect of cell therapy in vivo. This review focuses on the application of SPIO and 19F probes in magnetic resonance imaging to track in vivo immune cells.]]></description>
<pubDate>Fri,20 Mar 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[A review of the application of multiple MRI techniques in mild traumatic brain injury]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.03.016</link>
<description><![CDATA[With the rapid development of society and economy, the incidence of TBI has increased year by year. Among which most common mTBI due to its ralatively subjective clinical manifestation, low positive rate of related auxiliary examination, and existence of responsibility controversy during life, it has received more and more attention from scholars of all walks of life. In this paper, the author reviews the application progress of magnetic resonance including SWI、DTI and rs-fMRI in mTBI by literature’s retrospective analysis.]]></description>
<pubDate>Fri,20 Mar 2015 00:00:00  GMT</pubDate>
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