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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=201507</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
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<title><![CDATA[Metabolic changes of striatum and substantia nigra in patients with early Parkinson<sup><sup>,</sup></sup>s disease demonstrated by 1H-MRS]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.07.001</link>
<description><![CDATA[Objective: To investigate whether 1H-MRS can be used to demonstrate the metabolic changes in striatum and substantia nigra for early Parkinson’s disease (PD). Materials and Methods: Totally, 44 patients with early Parkinson’s disease having bilateral symptoms but without dementia were enrolled. Thirty-two age and sex-matched volunteers were included as normal controls. 1H-MRS using single-voxel PRESS for the striatum and multiple-voxel PRESS for the substantia nigra were performed. MRS data were successfully obtained from the striatum in 33 patients and the substantia nigra in 32 patients, and respectively from 31 and 28 volunteers. The metabolite contents, including N-acetylaspartete (NAA), Choline (Cho), Creatinine (Cr) and their relative ratios were analyzed and compared. Results: No significant differences were found for each ratio of metabolite contents between right and left in striatum and substantia nigra either in the patients or in the controls (P＞0.05). The NAA/Cr ratio of the striatum was lower in the PD patients than that in controls  (P＜0.05), but no significant differences were found in other ratios (P＞0.05). In the substantia nigra, there were no significant differences for all metabolite content ratios between the two groups (P＞0.05). Conclusions: 1H-MRS can be used to detect the metabolic abnormality in striatum for early PD with bilateral symptoms without dementia, which is helpful for the early diagnosis of PD.]]></description>
<pubDate>Mon,20 Jul 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Assessment of diffusion tensor imaging and arterial spin labeling in acute ischemic cerebral apoplexy brain damage]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.07.002</link>
<description><![CDATA[Objective:  To evaluate acute ischemic cerebral apoplexy brain damage by diffusion tensor imaging (DTI) and arterial spin labeling (ASL) at 3.0 T MRI. Materials and Methods: Twenty-five cases with acute ischemic cerebral apoplexy, there were 5 cases of superacute stage, 16 cases of acute stage and 4 cases of subacute stage. All patients underwent DTI and ASL imaging techniques. DTI and ASL images in every period were observed and performed post-processing using professional software to rebuild the corticospinal tract, and FA, ADC and rCBF values of the infarction and mirror areas of magnitude were measured. Difference of FA, ADC and rCBF values between infarction and mirror areas were analyzed by t-test. Correlation between FA, ADC and rCBF values was analyzed by multivariate partial correlation analysis. Results: FA, ADC and rCBF values of infarct areas in all patients were decreased evidently (P＜0.05), correlation of FA, ADC and rCBF values in infarction area had no obvious significant difference (P＞0.05). The Spearman rank correlation analysis of three periods respectively FA, MD and rCBF values of infarction areas were no obvious difference (P＞0.05). Conclusions: DTI and ASL could reflect the situation infarcts perfusion early and the relationship between the infarction and white matter fiber bundles. DTI and ASL could be used to predict the degree of acute isschemic cerebral apoplexy brain damage.]]></description>
<pubDate>Mon,20 Jul 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Magnetic resonance imaging findings of cryptococcus meningoencephalitis in AIDS patients]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.07.003</link>
<description><![CDATA[Objectives: To characterize the cranial magnetic resonance imaging findings of cryptococcus meningoencephalitis in AIDS (Acquired immunodeficiency syndrome) patients. Materials and Methods: The magnetic resonance imaging features of intracranical cryptococcus meningoencephalitis in 14 patients with AIDS were retrospectively analyzed. Results: Intracranial lesions were found in 13 cases of the 14 patients (92.86%) with MRI head scan. Gelatinous pseudocysts and dilated V-R (Virchow-Robin) spaces were seen in 6 cases (42.29%), cephalomeningitis were seen in 4 cases (28.57%), granuloma (crytococcomas) were seen in 3 cases (21.43%), focal encephaledema were seen in 2 cases (14.29%), hydrocephalus were seen in 1 case (7.14%), encephalatrophy were seen in 1 case (7.14%). Conclusions: MRI showed multiplex characteristic of cryptococcus meningoencephalitis in AIDS patients. Meningitis, meningoencephalitis and encephalitis were the principal types of MRI findings, and gelatinous pseudocysts and dilated V-R (Virchow-Robin) spaces may be considered specific for the diagnosis of cryptococcus meningoencephalitis.]]></description>
<pubDate>Mon,20 Jul 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[MRI measurement of fetal cerebellar vermis development]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.07.004</link>
<description><![CDATA[Objectives: To study the growth curve of the fetal cerebellar vermis in different gestational age. Materials and Methods: Sixty-three fetuses (15— 40 gestational weeks) were scanned by 3.0 T magnetic resonance, in which 52 cases met the measurement requirements. Scanning sequence: T1WI, T2WI. Scanning plane: Sagittal, Coronal, Axial. Measurement: the antero-posterior diameter (APD), the height of anterior and posterior vermis. The linear regression between the gestational age and parameters mentioned above was analyzed. Results: The antero-posterior diameter, the height of anterior and posterior vermis were positively correlated with gestational age. The height of anterior vermis slightly higher than posterior vermis, the primary and infero-posterior fissure could clearly displayed in the most middle sagittal plane,  P＜0.05. Conclusions: The normal performance and growth curve of the fetal cerebellar vermis can be described by MR imaging after 17 weeks.]]></description>
<pubDate>Mon,20 Jul 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[A comparative analysis of HASTE sequence of MRI examination with ultrasonic diagnosis in fetal brain abnormality]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.07.005</link>
<description><![CDATA[Objective:  To explore the clinical application of half-Fourier acquisition single-shot turbo spin-echo (HASTE) sequence of MRI examination for fetal brain diseases. Materials and Methods: Forty-six cases of pregnant women with ultrasonic diagnosis as diseases or suspected with disease in fetal brain were performed with HASTE sequence scanning by axial view, sagittal view and coronal view. A comparative analysis was performed between the results of HASTE sequence and the results of ultrasound diagnosis. Results: Of the 46 cases, 34 were diagnosed with specific diseases and 12 suspected with abnormal fetal brain by the ultrasonic examination, while 35 cases with 45 specific conditions were found by HASTE sequence and 11 found without abnormal signs. For the liquid lesions, there was a good consistency, 96% (26/27), between ultrasonic examination and HASTE sequence in the group of the lesions ≥3 mm, while only 25% (3/12) consistence was found between ultrasonic examination and HASTE sequence in the group of the lesions ＜3 mm. For the craniocerebral midline structure diseases and complex intracranial diseases, HASTE sequence was proved to be significantly better than those of ultrasonic examination. Conclusions: HASTE sequence is proved to be a potential tool for validating or correcting the ultrasonic diagnosis in the fetal brain diseases, and is found to be significantly better than ultrasound for the craniocerebral midline structure lesions and parenchymal diseases.]]></description>
<pubDate>Mon,20 Jul 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[The value of intravoxel incoherent motion model of diffusion weighted imaging in differentiating benign from malignant breast lesions]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.07.006</link>
<description><![CDATA[Objective:  To investigate the diagnostic value of parameters derived from diffusion-weighted imaging intravoxel incoherent motion (IVIM) model for benign and malignant breast lesions, and compare these parameters with that of monoexponential model and dynamic contrast-enhanced magnetic resonance imaging(DCE-MRI). Materials and Methods: Seventy cases (23 cases of benign lesions in total 24, 47 cases of malignant lesions in total 48) of breast disease with breast MRI examination in our hospital were collected. All of them were examined with multiple-b-value diffusion-weighted imaging (DWI) and DCE-MRI scans. GE AW4.4 workstation was used to calculate the value of ADC, ADCstandard, D, D*, f, and to generate time-signal intensity curve (TIC). All parameters between benign and malignant breast lesions were compared by Mann-Whitney U test. The diagnostic performance of different parameters was evaluated by receiver operating characteristic curve (ROC curve) analysis. Results: The ADC, ADCstandard, D, f value of malignant lesions were (1.01±0.18)×10-3 mm2/s, (1.10±0.18)×10-3 mm2/s, (0.86±0.16)×10-3 mm2/s, (25.50±9.23) % respectively, benign lesions were (1.42±0.29)×10-3 mm2/s, (1.53±0.27)×10-3 mm2/s, (1.28±0.26)×10-3 mm2/s, (15.98±3.68) %. There were statistically significant differences between these parameters (P＜0.001). With ROC curve analysis for each parameter value, the area under the curve (AUC) of D value was 0.932 which was the highest one, and corresponding diagnostic sensitivity and specificity were 89.6% and 91.7% while taking the optimal threshold of 1.03×10-3 mm2/s. AUC value can be increased to 0.974 by combining D with f value, and the corresponding diagnostic sensitivity and specificity were 85.4% and 100% respectively. Conclusions: The ADCstandard, D and f value from the IVIM model can be used to distinguish benign from malignant breast lesions. Associated with D and f value can obtain better diagnostic performance than the ADC value and the TIC.]]></description>
<pubDate>Mon,20 Jul 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Correlation of MR apparent diffusion coefficient value with HER-2 expression in non-mass-like breast carcinoma]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.07.007</link>
<description><![CDATA[Objective:  To investigate the association of MR apparent diffusion coefficient (ADC) value with HER-2 expression in non-mass-like breast carcinoma. Materials and Methods: Seventy-three cases diagnosed as breast cancers by pathologic examination underwent magnetic resonance prior to surgery. All cases performed non-mass-like enhancement in dynamic contrast-enhanced MR imaging. The expression of HER-2 in tumor tissue were assayed by immunohistochemical (IHC) staining and Fluorescence in situ hybridization (FISH). ADC value was calculated using two b factors (b=0, 800 s/mm2). t test and Spearman rank correlation were used toevaluate correlations between ADC value with HER-2 expression. ROC curve was applied to get the best threshold of ADC value ,which was to judge HER-2 expression. Results: The ADC value in HER-2 positive and negtive expression group was (1.028±0.171)×10-3 mm2/s and (0.931±0.176)×10-3 mm2/s, respectively. The ADC value in the positive expression group was significantly higher (t=2.212, P=0.030). ADC value had positive correlation with the positive expression of HER-2(r=0.294, P=0.012). The best threshold of ADC value to judge HER-2 expression was 0.977×10-3 mm2/s by ROC curve, while the sensitivity and specificity were 70.8% and 67.3%, respectively. Conclusions: ADC value may have positive correlation with the expression of HER-2 in non-mass-like breast carcinoma, and draw up the treatment plan and prognosis evaluation for patients.]]></description>
<pubDate>Mon,20 Jul 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[The study of correlation between ageandanatomical segment in healthy lumbarinterverbraldiscs by diffusion tensor imaging]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.07.008</link>
<description><![CDATA[Objective:  Discuss the correlation between lumbar intervertebral disc and age and anatomic site for healthy people with diffusion tensor imaging (DTI). Materials and Methods: Gather 30 healthy adult volunteers with their age range from 21 to 45, which are divided into 5 groups, 21—25, 26—30, 31—35, 36—40 and 41—45. Carry out DTI sequence scanning on them and determine FA and ADC value of each group with MRI software ADW 4.4. Discuss the correlation between above value and age change and different segments of intervertebral disc. Results: With the growth of age, ADC value of L1-S1 declines gradually (Ⅰ: r=－0.470, P＜0.01, Ⅱ: r=－0.513, P＜0.01, Ⅲ: r=－0.593, P＜0.01, Ⅳ: r=－0.697, P＜0.01, Ⅴ: r=－0.601, P＜0.01), and FA value is not related to age. With the moving down of anatomic segment, at different sites, L1—4 declines slightly and L4—S1 rises obviously, as a whole, it presents a rising trend (F=8.726, P＜0.05). Conclusions: ADC value declines with the growth of age. FA value presents a rising trend with the moving down of position and lower intervertebral disc rises obviously. The DTI study indicates that the degenerative change of lumbar intervertebral disc has the correlation with both age and anatomic site.]]></description>
<pubDate>Mon,20 Jul 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Assessment of renal injury in diabetic nephropathy using blood oxygenation level-dependent MRI]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.07.009</link>
<description><![CDATA[Objective: To explore the clinical application of blood oxygenation level-dependent MRI for the assessment of diabetic nephropathy (DN). Materials and Methods: Eleven cases of healthy volunteers (control group), 19 cases with early-stage DN and 15 cases with moderate- to severe-stage (MS-stage) DN were scanned by BOLD-MRI. The three parameters, including cortical R2* value (CR2*), medullary R2* value (MR2*) and R2* ratio of the medullary R2* value to cortical R2* value (MCR), were measured and calculated. Results: The MR2* was higher than CR2* in each group (P＜0.01). MR2* was significantly different between the normal control group and early-stage DN group (P＜0.01), and area under receiver operating characteristic curve (AUC) was 0.940. Both CR2* and MCR were significantly different between the early-stage and MS-stage DN groups (P＜0.01). AUCs were 0.884 and 0.764, respectively, and there was no significant difference between them (P＞0.05). CR2* correlated inversely with eGFR (P＜0.01), while MCR correlated positively (P＜0.05). The three parameters showed no significant correlation with HbA1c (P＞0.05). Conclusions: BOLD-MRI could reflect renal injury in diabetic nephropathy and had a potential value for clinical application.]]></description>
<pubDate>Mon,20 Jul 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Feasibility of multiple-echo GRE with parameters optimized protocol at 3.0 T MRI]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.07.010</link>
<description><![CDATA[Objective: To explore the feasibility of 12-echo GRE with parameter optimized protocol at 3.0 T MRI by shortening minimum TE (TEmin) and scan time (ST). Materials and Methods: A MR special model which includes fifteen vials containing 0—3.2 mM manganese chloride in hydrochloric acid solution, 45 volunteer livers of  10 severe and 35 non-severe iron-overloaded patients were included in the study. 12-echo GRE sequence with parameter optimized at 3.0 Tesla unit was performed in our study and conventional protocol was executed in control group. T2* or R2* were quantified by a well-trained physician using a CMR tools or combining with EXCEL after MRI, TEmin and ST obtained from these two protocols were recorded respectively as well. Difference of values in T2*, TEmin and ST between the two groups were analyzed with SPSS 16.0 (Paired-Sample t test or Two Related Sample Test). P＜0.05 has statistic significance. The correlation between R2* and phantom concentration (PhC) was analyzed by two-correlative-variable and curve-fitting. Results: Statistic differences were found for TEmin and ST value between the two groups (P=0.000), TEmin and ST value obtained from study protocol were (0.62±0.02) ms and (9.3±0.8) s, reduced by 53.0%, 45.0% comparing to control groups, respectively. For phantom and non-severe iron deposit livers, no statistic differences were found for T2* value between the two groups (Pphantom/liver=0.814/0.201). However, for severe iron deposit group, there was statistic difference between these two groups (P=0.001), also quantitative reliability of T2* value from study protocol was much better than control sequence. No statistic difference was found for T2* value among study sequence scan on phantoms, protocol repeating and next month scan (P=0.584). Phantom R2* was linearly correlated with its PhC (r=0.986, P=0.000). Through the regressions procedure, a slope of 7.008 and an intercept of 0.036 were found. Conclusions: Within a certain range of iron deposits, 12-echo GRE protocol with parameters optimized is feasible at 3.0 T MRI for both phantoms and in vivo livers. For severe hepatic iron deposit, measurement by 3.0 T MRI showed a better reliability.]]></description>
<pubDate>Mon,20 Jul 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Application progresses of functional magnetic resonance imaging in epilepsy of cognitive function]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.07.013</link>
<description><![CDATA[Functional magnetic resonance imaging (fMRI) is a non-invasive neuroimaging technique that has developed rapidly over the last few years, and it is being used as an important tool for clinical diagnosis and evaluation of epilepsy. Because of long-term repeated abnormalities discharge in brain, patients often have cognitive impariments including language, memory, comprehension, etc., and have a serious impact on their physical and mental health. Functional MRI plays a significant role in determining language laterality and location, assessing language and memory deficits after epilepsy surgery. This technique can help us to understand more deeply about the pathogenesis of epilepsy,and it seems to have an encouraging application prospect in epilepsy.]]></description>
<pubDate>Mon,20 Jul 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[The neuroimage research progress of mental disorders caused by traumatic brain injury]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.07.014</link>
<description><![CDATA[Traumatic brain injury with mental disorders has become a worldwide hot in the field of cognitive neuroscience. So far the diagnosis of brain disorders largely depends on the clinical evaluation, we know little about it's pathogenesis. Recently we discover that the pathological damage caused from brain trauma may last for a lifetime by imaging .TBI potentially acts as an important epigenetic risk factor for serious neurobehavioural sequelae such as Alzheimer disease and chronic traumatic encephalopathy by disconnecting brain network. Now this article mainly discusses the current research progress of it.]]></description>
<pubDate>Mon,20 Jul 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Development and application of new MRI technology in rectal cancer]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.07.015</link>
<description><![CDATA[Rectal cancer is one of the most common malignant tumors of the gastrointestinal tract, and its treatment and prognosis depends on staging. At present the most accurate method for rectal cancer staging is MRI. Early, accuracy rate for T, N staging was low with MRI conventional sequences. In order to improve the diagnostic accuracy and provide more clinical information, scholars have tried endorectal coil, high resolution MR imaging (HR MRI), enhancement and dynamic contrast enhancement (dynamic contrast enhancement, DCE), diffusion-weighted imaging (DWI). In this article, we reviewed the clinical application of the above MRI new technology.]]></description>
<pubDate>Mon,20 Jul 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[The progress of diffusion-weighted MRI application in prostate cancer diagnosis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.07.016</link>
<description><![CDATA[Magnetic resonance imaging (MRI) has been used in prostate cancer (PCa) diagnosis for over a decade. Diffusion weighted imaging (DWI) is one of the methods of the MRI techniques that could provide qualitative as well as quantitative information at a cellular level. DWI potentially could develop into a powerful technique to improve the accuracy of MRI to evaluate the PCa. In this article, we will present the basics of DWI, clinical application, as well as the limitations and the future directions of DWI of PCa.]]></description>
<pubDate>Mon,20 Jul 2015 00:00:00  GMT</pubDate>
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