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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=201603</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
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<title><![CDATA[An imaging measurement study on the diffusion tensor tractography of white matter fibers in the brains of schizophrenia patients]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.03.001</link>
<description><![CDATA[Objective: To investigate the viability and significance of imaging measurement on the diffusion tensor tractography of white matter fibers. Materials and Methods: A study group of 50 patients suffering from schizophrenia, a control group of 50 healthy persons. Taking the above-mentioned 2 groups as subjects of study and making imaging tractography measurement on the diffusion tensor of the amount of white matter fibers among the two groups of people. Results: (1) No obvious significant difference statistically was found in contrasting the age and gender of the two groups of people. (2) The differences were significant statistically (P＜0.05) when comparing comparison between the two groups in terms of distribution differences between left and right parts of the brain. Tests on the study group showed that subjects in this group register lower volume in such aspects as bilateral temporal gyros, bilateral middle and outer bag hook back around bilateral hippocampal FA difference than the control group. The bigger the difference is the more statistical value the study shows. Conclusions: In measuring the FA value of white matter in the study group using diffusion tensor imaging, the researchers made symmetrical measurements on the clearest parts of the two levels of successive adjacent parts. When the FA value of white matter shown in the diffusion tensor tractography is found to be abnormal, bilateral FA value can be measured, the difference between the right side FA value and the left side FA value can be used in carrying out clinical analysis on microscopic structure chang of white matter.]]></description>
<pubDate>Sun,20 Mar 2016 00:00:00  GMT</pubDate>
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<title><![CDATA[The role of mean relative cerebral blood volume of MRI in differentiating recurrent glioma from radiation injury: a Meta-analysis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.03.002</link>
<description><![CDATA[Objective:  This Meta-analysis is to evaluate the diagnostic accuracy of rCBVmean of MRI in distinguishing glioma recurrence from radiation injury. Material and Methods:  PubMed, Embase and Chinese Biomedical database were systematically searched for studies (from January 2000 to August 2015) that evaluated the rCBVmean of MRI in differential diagnosis of glioma recurrence from radiation injury. Data were extracted from eligible studies and these studies were performed quality assessment. The Meta–analysis was performed by Stata13.0. Results:  Fourteen studies involving 378 patients were eligible, and included in our Meta–analysis. The pooled SEN, SPE, PLR, NLR and DOR were 0.87 (95% CI: 0.80—0.91), 0.89 (95% CI: 0.81—0.94), 7.6 (95% CI: 4.3—13.4), 0.15 (95% CI: 0.10—0.23) and 50 (95% CI: 22—117), respectively. The area under the SROC was 0.93 (95% CI: 0.91—0.95). Conclusions:  This Meta–analysis showed that the rCBVmean of MRI had good diagnostic accuracy in discriminating between glioma recurrence and radiation injury.]]></description>
<pubDate>Sun,20 Mar 2016 00:00:00  GMT</pubDate>
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<title><![CDATA[Differences in MRI findings between intracranial hemangiopericytoma and angiomatous meningioma]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.03.003</link>
<description><![CDATA[Objective:  To explore the MRI differences between intracranial anaplastic hemangiopericytoma (HPC) and angiomatous meningioma. Materials and Methods: There were sixteen patients with HPC and twenty four patients with angiomatous meningioma proved by operation and pathology. The imaging data about preoperative MRIs and enhancements of them were analyzed retrospectively. The imaging characteristics of these tumors were analyzed with chi-square test (χ2) and two independent sample t-test, with P＜0.05 for the difference statistically significant. Results:  The length of the tumor (t=2.066, P=0.046), lobulation (χ2=7.111, P=0.008), T1WI signal (χ2=17.220, P＜0.001), T2WI signal (χ2=22.247, P＜0.001), iso-low signal in DWI (χ2=4.310, P=0.038), cystic necrosis (χ2=7.111,P=0.008), the degree of peritumoral edema (χ2=9.864, P=0.014), signal void of vessel (χ2=8.087, P=0.004), subdural connected with a narrow base (χ2=15.973,P＜0.001) ware statistically significant (P＜0.05) between HPC and angiomatous meningioma. Meningeal tail (χ2=0.150, P=0.698), Intratumoral hemorrhage (χ2=2.338, P=0.126), brain midline shift (t=–1.656, P=0.106) showed no statistical differences (P＞0.05). Conclusions: There are differences in MRI findings between HPC and angiomatous meningioma. It is helpful for the diagnosis and differential diagnosis through the comparative analysis of the imaging signs.]]></description>
<pubDate>Sun,20 Mar 2016 00:00:00  GMT</pubDate>
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<title><![CDATA[The application value of MR sequence in cranial neurovascular imaging]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.03.004</link>
<description><![CDATA[Objective:  We compared the display capability of 3D-SPACE, 3D-CISS, 3D-VIBE and 3D-TOF sequence on nerve, vessels and their spatial relationship, and choose optimal sequences to show the relationship between vessels and nerves. Materials and Methods:  3D-SPACE, 3D-CISS, 3D-VIBE , 3D-TOF sequence and conventional MR were used for the MR scan. The MR scan was performed in patients with trigeminal neuralgia, mimetic convulsion or glossopharyngsal neuralgia. 3D MRP and MIP views were reconstructed to show the relationship between nerves and surrounding vessels. Results:  Compared with 3D-CISS sequence, 3D-SPACE sequence shows a higher sensitivity in the detection of responsibility blood vessels and the relationship between nerves and blood vessels;Compared with 3D-VIBE sequence, 3D-TOF sequence shows a higher visualization in whole vessels shape. Conclusions:  3D-SPACE sequence can show the relationship between nerve and blood vessels, 3D-TOF sequence can display the whole vessel shape and judge the source of blood vessel in MIP reconstruction. The combination of the two sequences can Visually show the advantage of MR in neurovascular imaging.]]></description>
<pubDate>Sun,20 Mar 2016 00:00:00  GMT</pubDate>
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<title><![CDATA[The value of diffusion-weighted imaging for clinical evaluation of chemoradiatiotherapy of non-surgical laryngeal and hypopharyngeal carcinoma patients]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.03.005</link>
<description><![CDATA[Objective: To investigate the value of the magnetic resonance diffusion weighted imaging combined with conventional MRI for predicting clinical effect of chemoradiotherapyin non-surgical laryngeal and hypopharyngeal carcinoma. Materials and Methods: A total of 25 cases of patients with non-surgical laryngeal and hypopharyngeal carcinoma, which was confirmed by biopsy or surgical pathology, were included. All patients underwent conventional MRI and DWI scan for pre- and post-treatment. The maximum cross sectional area and apparent diffusion coefficient (ADC) value (the mean, the highest and lowest ADC value) of the tumor were measured before treatment. The residual tumor size and ADC values were measured after treatment, and tumor regression rate was calculated. The differences of ADC values with complete response (CR) and non-CR before and after treatment were analyzed. Results: The maximum cross sectional area [2.42 (0—7.92) cm2] of the tumor after treatment was significantly reduced (P＜0.05) than that from pre-treatment [4.81 (0.83—14.12) cm2]. The total tumor remission rate was 74.8% (6.0%—100%) and CR was in 11 (11/25, 44.0%) patients. Pre-treatment ADCmean and the highest ADC value were negatively correlated with the rate of tumor regression (r=-0.922, -0.691, P＜0.05), and post-treatment ADCmean value was positively correlated with the regression rate (P＜0.05, r=0.678). Pre-treatment ADCmean and ADChigh values in non CR group were higher than those in the CR group. Post-treatment ADCmean value and differences of the ADC value between pre- and post-treatment of CR group were significantly higher than those of non CR group (P＜0.05). Conclusions: The pre-treatment ADC values and the differences of the ADC value between pre- and post-treatment might be useful to predict and evaluate the response of radiotherapy and chemotherapy in the non-surgical laryngeal and hypopharyngeal carcinoma patients.]]></description>
<pubDate>Sun,20 Mar 2016 00:00:00  GMT</pubDate>
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<title><![CDATA[MRI features of primary biliary cirrhosis and correlations with pathological staging]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.03.006</link>
<description><![CDATA[Objective: To explore the features of primary biliary cirrhosis (PBC) on magnetic resonance imaging (MRI) and correlate them with pathological staging. Materials and Methods: MRI and pathologic findings of 50 patients with PBC (observation group) and 44 patients with other cirrhosis-causing liver diseases (control group) were analyzed, retrospectively. The severity of PBC was divided into stageⅠ—Ⅳ according to the histopathological changes. The MRI findings of the patients in the two groups were reviewed and compared, and the differences of MRI findings of PBC in different pathological stages were discussed. Results: The common MRI findings of PBC are the heterogeneous hyperintensity in the liver on T2WI, periportal long T2 signal intensity, periportal halo sign, decreased number and diameter of the intrahepatic bile ducts, liver parenchyma lace-like fibrosis, liver segmental atrophy or hypertrophy, abdominal lymphadenopathy, ascites and splenomegaly. The differences of the demonstrating frequencies on MRI were statistically significant in the periportal halo sign (χ2=6.887, P＜0.05), decreased intrahepatic bile ducts (χ2=5.537, P＜0.05), and lymphadenopathy (χ2=22.297, P＜0.05) between the observation group and control group. Among the patients with PBC in varied histological stages, the demonstrating frequencies on MRI between stage II and stage III were significantly different in the periportal halo sign (P＜0.05),and a decreased number and diameter of the intrahepatic bile ducts (P＜0.05), but not in the lymphadenopathy (P＞0.05). Conclusions: MRI findings of PBC were correlated with pathological staging, and the MRI examination was beneficial to evaluate the severity of the disease.]]></description>
<pubDate>Sun,20 Mar 2016 00:00:00  GMT</pubDate>
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<title><![CDATA[The diagnostic value of MRI to spinal tuberculosis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.03.007</link>
<description><![CDATA[Objective: To summarize the MRI performance feature of spinal tuberculosis, and improve the accuracy of MRI in the diagnosis of spinal tuberculosis. Material and Methods: One hundred and twenty cases with spinal tuberculosis confirmed with clinical pathology received digitized photography (DR) and MRI scan (including plain and contrast) before operations, and then calculate their respective diagnostic accuracy, do the chi-square test. Results: One hundred and twenty cases of spinal tuberculosis, the accuracy of DR was 60% (72/120), the accuracy of MRI was 93.3%(112/120), there was statistical difference between them (P＜0.05). Conclusions: The MRI can find early signs of spinal tuberculosis, it can help to determine the scope of the lesions, the diagnosis accuracy is high, and it has important significance for diagnosis and guiding clinical treatment.]]></description>
<pubDate>Sun,20 Mar 2016 00:00:00  GMT</pubDate>
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<title><![CDATA[MR Imaging assessment of correlations between Pfirrmann’s grading system and lumbar disc bulge and lumbar disc protrution in young patients]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.03.008</link>
<description><![CDATA[Objective: To find the MRI characteristics of the lumbar intervertebral disc degeneration in patients less than 30 years old with low back pain, and try to evaluate the correlations between Pfirrmann’s grading scale and intervertebral disc bugle and intervertebral disc protrution. Material and Methods: It is a cross-sectional and observational study. A total of 83 patients with low back pain performed lumbar MRI examination. All patients were less than 30 years old, of whom 50 were men and 33 were women, with mean age 25. All MR imaging were evaluated by two radiologists in the following aspects: signal intensity and morphology of the intervertebral discs, annular tear, intervertebral disc bulge, intervertebral disc protution, Modic changes and the Schmorl’s nodes. The intervertebral discs degeneration were evaluated through Pfirrmann’s classification system. The association between these different aspects were analyzed by Pearson multiple correlation. Results: A total of 415 intervertebral discs were examined, of which gradeⅠ—Ⅱ discs were 322 (77.6%), grade Ⅲ 56 (13.5%), grade Ⅳ 33 (7.9%) and grade Ⅴ 4 (1%). One hundred and three intervertebral discs were found with disc bulge and disc protrution, most of which were at disc L4—5 and L5—S1 level and were common in grade Ⅲ and grade Ⅳ degenerations. Seventeen patients were found with HIZ, and were all at disc L4—5 and L5—S1 level. Three patients were found with modic change. The statistic results show that grade Ⅲ degeneration were correlated well with disc bulge (r=0.972, P=0.006), but not with disc protrution (r=0.639, P=0.245) and the grade Ⅳ disc degeneration were correlated with disc protrution (r=0.999, P=0.000) and HIZ (r=0.919, P=0.028), but not with disc bulge (r=0.769, P=0.128). HIZ were correlated well with both disc bulge (r=0.919, P=0.027) and disc protrution (r=0.935, P=0.020). Conclusions: MRI is a good imaging modality for detecting the pathology character of disc degeneration in early stage. Grade  and grade degenerations have close relationship with intervertebral disc bulge and protrution. It may have great clinical value to detect early changes of intervertebral disc degeneration in young patients.]]></description>
<pubDate>Sun,20 Mar 2016 00:00:00  GMT</pubDate>
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<title><![CDATA[MRI features of brucellosis spondylitis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.03.009</link>
<description><![CDATA[Objective: To analyse MRI findings of brucellosis spondylitis(BS) and to improve the knowledge and diagnosis of this disease. Materials and Methods: The clinical date and MRI of 13 cases with clinically or histopathologically proved BS were retrospectively analysed.Results: Of 13 patients with BS, the adjacent vertebral body involved in 12 cases. BS mainly affected the lumber spine, mostly the L4. MRI findings included: Morphology of vertebral body showed no obvious change. Two cases showed marrow oedema only with no obvious bone destruction. Bone destruction were detected in 11 cases, which was small and multiple and was often focaled with the edge of vertebral body. Abnormal vertebral body showed homogeneous or heterogeneous hypointensity on T1WI and heterogeneous hyperintensity on STIR, and heterogeneous enhancement on enhanced scan. Bone destruction was accompanied by marrow oedema and osteosclerosis. Eight cases showed obvious osterphyte in the rim of vertebral body. Twelve cases showed disc involvement, intervertebral space was often normal or slightly narrowed. Paraspinal soft tissue swelling was shown in 13 cases, in which paraspinal abscess was formed in 3 cases and epidural abscess in 2 cases. The abscess was small with thick and irregular enhanced wall on enhanced scan.Conclusions: MRI of BS shows certain characteristics, which are helpful in diagnosis and differential diagnosis of this disease.]]></description>
<pubDate>Sun,20 Mar 2016 00:00:00  GMT</pubDate>
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<title><![CDATA[Quantitative T2 mapping to monitor the process of lumbar intervertebral disc degeneration in a rabbit model]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.03.010</link>
<description><![CDATA[Objective: To improve the recognition of quantitative T2 mapping to dynamically monitor the process of lumbar intervertebral disc degeneration in a rabbit model. Materials and Methods: The nucleus pulposus of L2—3, L3—4 and L4—5 discs of 12 rabbits were aspirated by using a 18G needle and the normal L1—2, L5—6 discs of each rabbit and the discs between L2—5 vertebral body of 6 rabbits acted as the normal intra and inter control groups, respectively. The rabbits were performed with sagittal MR T2WI and T2 mapping sequences scanning at the pre-and-post-operative 4 th, 8 th, 12 th week, respectively. The signal intensity of each disc was evaluated and T2 relaxation time was measured carefully. The discs between L1—6 were dissected and then performed with HE and Masson trichrome staining to evaluate the form of discs, content change of nucleus pulposus cells and matrix between normal and experimental groups. Results: The nucleus pulposus could be punctured successfully with a 18 G needle in the root of transverse process via spinal bypass. The normal discs manifested with uniform high signal in T2WI. The signal intensity decreased sharply at the 8 th week and became completely low signal intensity at the 12 th week post-operation. The significant difference of T2 relaxation time found between normal control groups and experimental groups after 4, 8 and 12 weeks was analysed by one-way ANOVA, and the result was F=38.82 (P＜0.05). The T2 relaxation time at the 8 th week post-operation was significantly different (P＜0.05). The results of HE and Masson staining showed that the cells and matrix decreased gradually, moreover, the boundary between annulus fibrosus and nucleus pulposus became obscure. The nucleus pulposus displayed the process of fibrosis and was almost replaced by fibrous tissue at 8 th week. The discs was fibrocartilage and local cartilage can be observed at the 12 th week. Conclusions: T2 mapping can be used to dynamically monitor the process of lumbar intervertebral disc degeneration.]]></description>
<pubDate>Sun,20 Mar 2016 00:00:00  GMT</pubDate>
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<title><![CDATA[Investigating the effect of aging on the microstructure of brain with novel diffusion imaging techniques]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.03.011</link>
<description><![CDATA[Understanding brain alterations taking place at the cell level during aging is of great importance for revealing the underlying reasons of the cognitive decline in older individuals. Diffusion magnetic resonance imaging (dMRI) provides a unique non-invasive probe into the microstructure of biological tissue in vivo. Diffusion tensor imaging (DTI) is now the most widely used dMRI technique in clinic. However, due to its some inherent limitations, it fails to fully characterize the microstructural properties of the brain tissues. Specifically, (1) DTI assumes a single diffusion process following a Gaussian distribution within each voxel, this assumption is b-value dependent and prohibits DTI from characterization of the actual non-Gaussian diffusion in brain tissues caused by obstacles such as cell membranes and organelles.(2) Diffusion parameters derived from DTI are sensitive, but non-specific to underlying structural changes. (3) DTI-based fiber tractography cannot resolve fiber crossings. (4) DTI is less applicable to investigate the microstructural changes in gray matter. Several more advanced techniques of diffusion are now available that may serve as effective tools to complement DTI. In this review, I introduced three such techniques: diffusion kurtosis imaging (DKI), composite hindered and restricted model of diffusion (CHARMED) and neurite orientation dispersion and density imaging (NODDI). DKI is an extension of DTI that provides a sensitive measure of tissue structure for both white and gray matter by quantifying the degree to which water diffusion is non-Gaussian. Results from several studies show that DKI provides important complementary indices of brain microstructure for the study of brain aging. CHARMED is a biophysical compartment model for white matter. It separates the signal from extra- and intra-axonal compartments in each voxel. The characterization of the intra-axonal part provides microstructural indices that are potentially more specific than those from DTI. CHARMED has not been widely applied in aging research because of its long acquisition time. However, a protocol that provides whole brain dataset in only 12 minutes has recently been developed, which might greatly boost its application in aging studies. NODDI is a unified compartment model for gray and white matter microstructure. It provides neurite density as well as orientation dispersion estimation. Available studies show NODDI is useful in disentangling factors contributing to the decrease in frontal fractional anisotropy and it can reveal age-related effects on gray matter in vivo with patterns aligning very closely with published postmortem data. Combined information from DTI and these new techniques would enable deeper understanding of how the microstructure of brain tissues changes with aging.]]></description>
<pubDate>Sun,20 Mar 2016 00:00:00  GMT</pubDate>
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<title><![CDATA[The research status of magnetic resonance imaging in Parkinson’s disease patients with depression]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.03.012</link>
<description><![CDATA[Parkinson's disease is a common neurodegenerative disease in the elderly, PD patients were mainly with the onset of motor disorders, but the incidence of non motor symptoms is also very high, the incidence of depression was the highest among the non motor symptoms. The symptoms of depression have a serious impact on the quality of life of patients with Parkinson's disease, and it is also an important factor to increase the motor impairment, cognitive impairment, accelerate the development of the disease and the effect of the treatment, but the mechanism is not clear. At present, functional imaging studies suggest that the pathogenesis of PD with depression may be related to the pathogenesis of dopamine neurons, 5- serotonin neurons and prefrontal-limbic system.]]></description>
<pubDate>Sun,20 Mar 2016 00:00:00  GMT</pubDate>
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<title><![CDATA[Research progress of resting-state fMRI on drug addition]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.03.013</link>
<description><![CDATA[Drug addiction is a chronic and recurrent brain disease, which has become a serious threat to the health of people's physical and mental health.Its related brain mechanism has not been fully elucidated. Resting state functional magnetic resonance imaging (rs-fMRI) is a kind of new neuroimaging technologies and developing rapidly, it has diversity analysis methods, and also has an unique advantage in the study of brain function integration of neural network, it has been wildly used to study the neural mechanism of drug addiction. This article aims to make an overview of the research and application of rs-fMRI and its diversity analysis methods in drug addiction.]]></description>
<pubDate>Sun,20 Mar 2016 00:00:00  GMT</pubDate>
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<title><![CDATA[Advances in the diagnostic values of DCE-MRI and DWI for breast cancer]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.03.014</link>
<description><![CDATA[If breast disease can be detected early and made timely and accurate diagnosis, it can simultaneously reduce patient psychological, physical suffering. The value of dynamic contrast-enhanced magnetic resonance imaging and magnetic resonance diffusion weighted imaging in the diagnosis of breast lesions has drawn more and more attention, this paper reviewed the research progress on diagnosis of breast cancer.]]></description>
<pubDate>Sun,20 Mar 2016 00:00:00  GMT</pubDate>
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