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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=201302</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
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<title><![CDATA[Diffusion tensor imaging study of patients with metabolic syndrome]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.02.001</link>
<description><![CDATA[Objective: In order to understand whether there is subclinical damage of nerve ﬁbre’s structure in the brain of metabolic syndrome (MS) with the course longer than 5 years, we used diffusion tensor imaging (DTI) to detect the FA values in the brain. Materials and Methods: 32 participants were categorized into two groups, metabolic syndrome group (15 participants) and control group (17 participants), ranging from  47 to 69 years old. We measured their body height, weight, blood pressure, blood glucose, blood lipid, scale about nerves function and examined their brain using magnetic resonance imaging (MRI) and magnetic resonance diffusion tensor imaging (DTI). Then the data were tested by statistical analysis. Results:  (1) Compared with the control group, the FA values of posterior limb of internal capsule (PLIC) and corona radiate area (CRA) were lower and signiﬁcant decline was found (P <0.01). The FA values of PLIC and CRA with three components of metabolic disorder in MS group were lower and signiﬁcant decline was found (P <0.01). The FA values of CRA with two components of metabolic disorder in MS group were lower and signiﬁcant decline was found (P <0.05). (2) Compared with the control group, the FA values of PLIC and CRA with hypertension, diabetes mellitus, hyperlipidemia, obesity in MS group were lower and signiﬁcant decline was found (P <0.05). (3) The multiple regression results: the FA values were negatively associated with hyperlipidemia, hypertension and obesity (r =－0.127, －0.103, －0.012, P <0.05). The FA values of CRA were negatively associated with age (r =－0.04, P <0.05), and negatively associated with the course of hypertension (r =－0.013, P <0.05). Conclusions: During this study, we found that there were signiﬁcant changes in nerve ﬁbre’s structure in the brain of metabolic syndrome group with the course longer than 5 years. The severity of nerve ﬁbre’s structure in the brain is related to the degree of metabolism dysfunction and the course of metabolism abnormality. Hypertension, hyperlipidemia and obesity were the independent risk factors for the damage of nerve ﬁbre’s structure.]]></description>
<pubDate>Wed,20 Feb 2013 00:00:00  GMT</pubDate>
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<title><![CDATA[Magnetic resonance spectroscopy study of patients with metabolic syndrome]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.02.002</link>
<description><![CDATA[Objective: In order to understand subclinical brain damage in the early stage, we used magnetic resonances spetroscopy (MRS) to detect the metabolic changes in the encephalon in participants with metabolic syndrome (MS). Materials and Methods: Of the project, 32 participants were categorized into two groups, metabolic syndrome group (15 participants) and control group (17 participants). We assessed whether they were hyperglycemia, hypertension, hyperlipidemia, obesity and nerves function rating scales, then examed their brain using MRS. The metabolite ratios of NAA/Cr, Cho/Cr  and NAA/Cho were measured in the dorsal thalamus, posterior cingulate gyrus and posterior part of lateral ventricle, then statistical analysis was performed. Results: (1) Compared to the control group,significant ratio of NAA/Cr and NAA/Cho declines of the MS patients, with three components of metabolic disorder and with two components of metabolic disorder in MS group in the dorsal thalamus,the posterior cingulate gyrus and posterior part of lateral ventricle were found (P values all <0.01). And signiﬁcant ratio of Cho/Cr increases in the callosal gyrus and posterior part of lateral ventricle were found (P values all <0.05). (2) The multiple regression results: The ratio of NAA/Cr was negatively associated with blood glucose in the dorsal thalamus (r =－0.187, P value <0.05). The ratio of NAA/Cr was negatively associated with LDL in the posterior part of lateral ventricle (r =－0.179, P value <0.05).  The ratio of NAA/Cr was negatively associated with the course of hyperlipidemia in the dorsal thalamus (r =－0.033, P value <0.01), and negatively associated with the course of hypertension and diabetes mellitus in the posterior part of lateral ventricle (r values to be －0.028, －0.029, P values all <0.05). The ratio of NAA/Cho was negatively associated with the course of hyperlipidemia in the dorsal thalamus (r =－0.027, P value <0.05), and negatively associated with the course of diabetes mellitus and obesity in the posterior part of lateral ventricle (r values to be －0.047, －0.017, P values all <0.05). Conclusions: (1) During this study, it was found that the abnormality of NAA/Cr, NAA/Cho, Cho/Cr suggests the abnormality of brain cells metabolism in the participants with metabolic disorder and MRS can help us to understand subclinical brain damage in the early stage. (2) Diabetes mellitus,hyp ertension,hyperlipidemia and obesity may be the independent risk factors for the metabolic dysfunction of brain cells. (3) There is obvious correlation between the severity of brain damage which shows on MR and the course of metabolism abnormality.]]></description>
<pubDate>Wed,20 Feb 2013 00:00:00  GMT</pubDate>
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<title><![CDATA[The correlation study of seizure and cerebral hemodynamics in Sturge-Weber syndrome]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.02.003</link>
<description><![CDATA[Objective: To evaluate the perfusion status of involved white matter in Sturge-Weber syndrome (SWS) using dynamical susceptibility contrasted perfusion imaging (DSC-PI), and then to compare the perfusion data and seizure variables, including age of first seizure, seizure frequency (score of seizure frequency, SSF) and duration of epilepsy, for reasonable explaining the hemodynamics and seizure variables in SWS. Materials and Methods: 14 patients (8 girls and 6 boys; age range, 0.8–10.0 years; median age, 4.0 years) with Sturge-Weber syndrome were recruited and performed MRI examination. All patients with unilateral lesions were located in one side of the cerebral hemispheres. MR protocols included axial and sagittal T1-weighted, axial fast spin-echo (FSE) T2-weighted, DSC-PI and contrasted T1-weighted. All raw data of DSC-PI were processed through the SPIN software (signal process in neuroimage). After determining the location and realm of SWS lesions, the CBF, CBV and MTT value of the affected and contralateral white matter were measured, and then the ratio of perfusion data, including CBFr, CBVr and MTTr were calculated. According to the CBFr values, all cases were divided into hyperperfusion group (HP) and hypoperfusion group (LP). The comparison of CBF, CBV and MTT values between the affected and contralateral hemispheres was tested by Mann-Whitney U analysis. The correlations of all perfusion data and seizure variables (age of ﬁrst seizure, SSF and duration of epilepsy) were analyzed by Spearman correlation analysis. Results: In all, nine cases belonged to the LP group according to the signiﬁcantly decreased CBF and CBV in the affected white matter compared to those in the contralateral’s (CBFr =－0.37±0.24, CBVr=－0.22±0.25, P <0.01), and the other 5 cases were in the HP group based on the signiﬁcantly increased CBF and CBV of affected white matter (CBFr =0.31±0.05；CBVr=0.40±0.17, P <0.01). The age and SSF of LP group were slightly higher than HP group (age were 63.80 months & 48.83 months; SSF were 2.50 & 1.33), but no signiﬁcant difference was present respectively (P =0.36, 0.12). Longer duration of epilepsy was related to lower CBF (more negative CBFr, r =－0.58, P <0.05) and low CBV (r =－0.55, P <0.05) on the affected side. Lower perfusion was associated with more frequent seizures (CBFr: r =－0.56, CBVr: r =－0.63, P <0.05). Conclusions: The perfusion of affected white matter in Sturge-Weber syndrome did not decrease continuously as illustrated by previous studies, whiles the relatively hyperperfusion was considered as a common phenomena. There are relationships between brain perfusion status and seizure severity in SWS.]]></description>
<pubDate>Wed,20 Feb 2013 00:00:00  GMT</pubDate>
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<title><![CDATA[A quantitative susceptibility mapping of brain iron overload in spontaneous intracerebral hemorrhage: a quantitative 3 T MRI study]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.02.004</link>
<description><![CDATA[Objective: To evaluate the potential value of the brain iron overload deposition of globus pallidus (GP) in patients with spontaneous intracerebral hemorrhage (ICH) by quantitative susceptibility mapping (QSM). Materials and Methods: The data of 21 patients with ICH and 20 healthy controls(HC) who had MR multi-echo QSM and CT performed were retrospectively analysized. The magnetic susceptibility of GP was quantitative detected in all cases. The difference of magnetic susceptibility was analysized between ICH and HC with Mann-Whitney test. Correlation analysis was performed between the magnetic susceptibility of GP、 T2SI and age with Pearson. Spearman correlation analysis was performed between the magnetic susceptibility of GP and onset time. Results: The difference of the magnetic susceptibility in GP was observed between ICH group and HC (Ｚ=－4.147 P <0.05). The magnetic susceptibility of GP was negatively correlated with T2SI (r =－0.715) and positively correlated with time of onset (r =0.434)in ICH group. However, no relationships was detected between the magnetic susceptibility and age (P >0.05)in all cases. Conclusions: The iron overload of GP may be a predictor of the brain damage and neurodegenerative. The quantitative assessment of non-heme iron overload in GP by QSM may be one of the indicators refer in the ICH patients.]]></description>
<pubDate>Wed,20 Feb 2013 00:00:00  GMT</pubDate>
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<title><![CDATA[Occipital cortex magnetic resonance spectrum in the application value of cerebral concussion]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.02.005</link>
<description><![CDATA[Objective: occipital cortex proton magnetic resonance spectrum of cerebral concussion patients with absolute quantification (1H-MRS) study, to investigate the changes of cerebral metabolites of brain concussion. Materials and Methods: The trauma of mild cerebral concussion, accord with the clinical diagnosis of the disease in 36 cases studied, 10 healthy volunteers as control group, routine MRI scan and 1H-MRS examination. The main metabolites observed index is N-acetyl aspartic acid (NAA), choline (Cho), creatine (Cr), absolute concentration of metabolites by LCModel software, NAA, Cr, Cho concentration, and NAA/Cr, the ratio of Cho/Cr. Results: compared with control group, the concentration of brain concussion group NAA, NAA/Cr decreased, the difference was statistically signiﬁcant (P <0.05), Cho concentration and Cho/Cr ratio increased slightly, no statistical signiﬁcance. Conclusions: 1H-MRS can reﬂect the changes of cerebral metabolites in patients with concussion of brain.]]></description>
<pubDate>Wed,20 Feb 2013 00:00:00  GMT</pubDate>
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<title><![CDATA[The advantages of multi-model MRIs in the diagnosis of cerebral venous sinus thrombosis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.02.006</link>
<description><![CDATA[Objective: To investigate the advantages of multi-model MRIs in the diagnosis of cerebral venous sinus thrombosis(CVST). Materials and Methods: 17 patients with CVST (6 men, 11 women; mean age, 42 years, range, 22—67 years) were enrolled in this study, including 7 acute CVST, 8 subacute cases and 2 chronic cases. Routine T1WI,T2WI,FLAIR and DWI were performed in all patients，TOF MRV was performed in 14 cases, enhanced MRI was performed in 11 and SWI was performed in 8 cases. Results: Unenhanced FLAIR and T2WI sequence showed disappeared venous sinus ﬂowing void effect andthrombus in the venous sinus with different signal. DWI showed high signal thrombus in the acute CVST patients (8 cases). The involved venous sinus were not displayed on MRV (14 cases) and showed filling defect on enhanced MRIs (10 cases). Dilated veins in drainage area were demonstrated by SWI (5 cases). Conclusions: Multi-model MRIs including FLAIR, T2WI, DWI, MRV, SWI, and enhanced MRI are verysensitive and useful in detecting the thrombus in the venous sinus and provide information about the pathological evolution.]]></description>
<pubDate>Wed,20 Feb 2013 00:00:00  GMT</pubDate>
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<title><![CDATA[A comparative study of MRI findings between active and no active lesions in ulcerative colitis patients]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.02.007</link>
<description><![CDATA[Objective: To compare MR ﬁndings of active lesions and no active lesions in a group of ulcerative colitis (UC) patients, to evaluate the difference between active lesions and no active lesions by MR imaging. Materials and Methods: Total 13 patients with histopathologically confirmed ulcerative colitis enrolled in this retrospective study, including seven active lesions and six no active lesions．The bowel thickness, incidences of bowel wall stratiﬁcation like “target sign”, mesenteric stranding like “comb sign” and adjacent enlarged lymph nodes were measured, then the time-signal intensity curves (TICs) of diseased bowel after dynamic contrast enhanced MRI (DCE-MRI) were plotted, time to peak (TTP) value and relative enhancement rate (Er) after correction by psoas muscle were calculated, the differences of MR ﬁndings between the active and no active lesions were compared statistically. Results: The bowel thickness of active lesions was signiﬁcantly increased than that of no active lesions [(11.1±3.7) mm versus (5.3±1.2) mm, P <0.1]. There were also signiﬁcant differences in the incidences of bowel wall stratiﬁcation like “target sign” and mesenteric stranding like “comb sign” between the two groups (71.4% versus 0, 85.7% versus 0. P <0.01). But there was no significant difference of mesenteric enlarged lymph nodes between active and no active UC (42.9% versus 16.7%. P >0.05) . The types of TIC in active group were fast rising and fall slowly, however the type of TIC in no active group was slowly rising. TTP and Er differed signiﬁcantly between them [(111.4±48.1) s versus (240.0±50.2) s. (166.3±98.8)％ versus (49.6±41.6)％. P <0.05]. Conclusions: There were differences in bowel thickness, mesenteric stranding like “comb sign”, bowel wall stratiﬁcation like “target sign” , TTP and Er between active and no active UC.]]></description>
<pubDate>Wed,20 Feb 2013 00:00:00  GMT</pubDate>
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<title><![CDATA[MRI diagnosis of malignant fibrous histiocytoma of the breast: a report of 3 cases]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.02.008</link>
<description><![CDATA[Objective: To probe the value of MRI diagnosis of malignant fibrous histiocytoma of the breast. Materials and Methods: The MR findings and clinical data of 3 cases with the malignant fibrous histiocytoma of the breast by operation and pathology were reviewed retrospectively. Results: The 3 tumors were large，on MRI，all tumors showed low signal intensity on T1-weighted images. On T2-weighted images, tumors displayed inhomogeneous high, low, and mix signal intensity. Necrosis or myxoid degeneration were seen in all 3 cases. Low intense septum structurew as noted on T2-weighted images in 3 patients. Conclusions: MRI has the important diagnosis value in the malignant fibrous histiocytoma of the breast. The confirmed diagnosis of malignant fibrous histiocytoma of the breast must be depended on the operation and pathology.]]></description>
<pubDate>Wed,20 Feb 2013 00:00:00  GMT</pubDate>
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<title><![CDATA[The MR signal changes of asymptomatic college volunteers lumbar intervertebral disks and clinical significance]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.02.009</link>
<description><![CDATA[Objective: To analyze MR signal changes of lumbar intervertebral disc and clinical significance of the asymptomatic college students. Materials and Methods: Lumbar spine of 62 asymptomatic college volunteers aged between 18 to 27 years were examnated with MRI, MR images were analyzed by two experienced image doctors, and to record the imaging of lumbar intervertebral discs abnormalities that including：degeneration，protrusiont, herniation, free and the ralation of discs and nerve roots. Results: Lumbar intervertebral disc of 39 (62.9%) in asymptomatic college volunteers were normal, and 23 (37.1%) cases were abnormal. Degeneration of 18 cases, (21 Intervertebral discs),including degeneration with protrusiont of  2 cases (2 Intervertebral discs), degeneration with herniation of 7 cases (7 Interverte-bral discs), protrusiont of 7 cases (8Intervertebral discs), herniation of 8 cases 
 (8 Intervertebral discs), no disk sequestrations and nerve not compression was diagnosed in 62 volunteers. Conclusions: The degeneration, herniation and protrusiont of lumbar intervertebral discs are often diagnosed by MRI in asymptomatic college students, so that the doctor should pay attention to avoiding misdiagnosis in clinical inspection, diagnosis and treatment.]]></description>
<pubDate>Wed,20 Feb 2013 00:00:00  GMT</pubDate>
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<title><![CDATA[MRI study of traumatic penumbra of focal brain injury in cats]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.02.010</link>
<description><![CDATA[Objective: This study is to investigate the existence of traumatic penumbra around the focal brain contusion by using magnetic resonance imaging. Materials and Methods: Nine cats were randomly divided into traumatic group (n=5) and control group (n=4). Modiﬁed Feeney’s model was adopted to set up focal traumatic brain injury cat model in traumatic group. MR sequences were performed at 6 h and 24 h after injury. The extent of the brain lesion on different MR sequences was delineated and calculated. The data were analyzed by one-way analysis of variance, least significant difference and paired t-test for multiple comparisons. Histological examination was performed after the last MR examination. Results: In the traumatic group, the area of the abnormal signal intensity is larger on perfusion weighted images (PWI) than on structural ﬂuid attenuated inversion recovery (FLAIR) images at both 6 h group (P<0.05) and 24 h group (P<0.05). And the area of the abnormal signal intensity on FLAIR is expanding from 6 h to 24 h after the injury (paired t-test, P<0.05). Ultrastructural observation revealed that cells in peri-contusion area showed degeneration change, disordered microcirculation and disrupted mitochondrion. Conclusions: Pathologically, the peri-contusion area might indicate the existence of penumbra tissue, which might be observed on MRI by showing the mismatch between FLAIR and PWI images.]]></description>
<pubDate>Wed,20 Feb 2013 00:00:00  GMT</pubDate>
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<title><![CDATA[MR application platform of innovative research: mastermind]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.02.011</link>
<description><![CDATA[Mastermind platform is another breakthrough technology after Tim, which changes the way to use MRI system. It helps to obtain outstanding image quality and leading application as well as to increase patient throughput dramatically. It has three main features: Brand-new hardware, targeting shimming greatly improves the shimming effect of the heart and MRS. Ultra-modern software. It brings more clinical solutions. ‘Artificial intelligence’ scanning, scanning is faster and more intelligent, furthermore, it greatly improves the image consistency and diagnostic accuracy.]]></description>
<pubDate>Wed,20 Feb 2013 00:00:00  GMT</pubDate>
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<title><![CDATA[The analysis of intracranial hyperintense on T1-weighted MR images]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.02.013</link>
<description><![CDATA[Various situations are resopsible for the intracranial hyperintense on T1- weighted images, such as posterior pituitary lobe, fat, methemoglobin, melanin, protein and miner. This article reviews the clinical knowledge and MR imaging characteristics of these normal organizations and lesions.]]></description>
<pubDate>Wed,20 Feb 2013 00:00:00  GMT</pubDate>
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<title><![CDATA[Current status of magnetization transfer imaging in nervous system diseases]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.02.014</link>
<description><![CDATA[Magnetization transfer imaging is a relatively new magnetic resonance imaging techniques, not only can be used to increase tissue contrast, but also quantitatively analyze tissue characteristics. A large number of studies have shown that MTI can be a sensitive tool for detecting microscopic pathological changes of nervous system diseases. Recently, MTI studies have been gradually increasing in nervous system diseases. In order to better understand pathophysiological mechanism of nervous system diseases, we reviewed clinical application and current stadus of MTI in nervous system diseases.]]></description>
<pubDate>Wed,20 Feb 2013 00:00:00  GMT</pubDate>
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<title><![CDATA[Current status of MR colonography]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.02.015</link>
<description><![CDATA[In this article, we discuss MR colonography in terms of techniques and indications, imaging findings, consensus on its current role, and future developments and research directions. MR colonography is useful for Colorectal Cancer Screening.]]></description>
<pubDate>Wed,20 Feb 2013 00:00:00  GMT</pubDate>
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<title><![CDATA[Progress of breast imaging in Radiological Society of North America 2012]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.02.016</link>
<description><![CDATA[About 339 abstracts referring to breast imaging were included in Radiological Society of North America 2012. In terms of imaging technique, articles related to MRI account for about 30%, followed by ultrasonography, digital mammography, digital breast tomosynthesis and molecular imaging. Research contents focus on application of new technology, screening, response evaluation of neoadjuvant chemotherapy and localization for breast.]]></description>
<pubDate>Wed,20 Feb 2013 00:00:00  GMT</pubDate>
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