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<title>Chinese Journal of Magnetic Resonance Imaging RSS feed</title>
<link>http://www.med-sci.cn/cgzcx/en/contents_list.asp?issue=201502</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
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<title><![CDATA[Progress and clinical application of MR imaging on musculoskeletal system]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.02.001</link>
<description><![CDATA[In recent years, the advance development of MRI technology provides a variety of new noninvasive methods in vivo imaging for musculoskeletal system diseases, including cartilage component quantitative analysis, short T2 tissue structure and bone microstructure imaging, which provide the basis for early diagnosis and treatment monitoring. The progress and clinical application of different MRI technologies will gradually increase the level of musculoskeletal system diagnosis, provide a new way for the study of MRI musculoskeletal system.]]></description>
<pubDate>Fri,20 Feb 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Progress and clinical application of cardiovascular magnetic resonance]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.02.002</link>
<description><![CDATA[The CMR in RSNA 2014 mainly focused on the following aspects: The correlation between microvascular obstruction (MVO) and left ventricular remodeling after acute myocardial infarction, and the prognostic value of MVO in ischemic cardiac disease; the assessment of right ventricular morphology and function in pulmonary valve and tricuspid diseases; the application of 3D SPACE and 4D phase contrast in congenital cardiac diseases; cardiac quantitative imaging described the value of ECV(extracellular volume fraction) in cardiomyopathy, diabetes and thalassemia major.]]></description>
<pubDate>Fri,20 Feb 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Progresses in magnetic resonance imaging of hepatocellular carcinoma]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.02.003</link>
<description><![CDATA[Objective: To review the recent advances of magnetic resonance imaging (MRI) techniques in the diagnosis, prognosis,treatment decision making and early assessment of therapeutic response of hepatocellular carcinomas (HCC). Materials and Methods: The newest related published literatures about the MR imaging of HCC were collected and analyzed. Results: With recent development and application of the functional MRI and liver-specific MR contrast agents in HCC, MRI is not only able to diagnose HCC in the early stage, but also reveal the tumor pathogenesis, biological behaviors and abnormal gene expressions at cellular level, thus providing significant information for the prognosis evaluation, treatment decision making and response assessment of HCCs. Conclusions: MR imaging plays a vital and effective role in the diagnosis, evaluation, surveillance and follow-up of HCC.]]></description>
<pubDate>Fri,20 Feb 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[A DTI study of brain white matter integrity in heroin addicts under short-time abstinence]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.02.004</link>
<description><![CDATA[Objective: To investigate the difference of brain white matter integrity between heroin addicts under short-time abstinence and control subjects by a diffusion tensor imagine(DTI)method, and explore the characteristics of changed brain white matter microstructure in heroin addicts under short-time abstinence. Materials and Methods: Twenty-five short-time abstinents and 20 control subjects were recruited. GE 3.0 T magnetic resonance scanner was used for DTI data acquisition. Tract-Based Spatial Statistics (TBSS) were used for fractional anisotropy (FA) comparison between HA group and HN group. Using two sample t test in SPSS 13.0 software to process demographic data, radial diffusivty (RD) value and axial diffusivty (AD) value between HA group and HN group. Partial correlation analysis was used between DTI indices and duration or dose of heroin use and duration of abstinence. Results: Compared with the HN group, significant reduced FA were found in several white matter regions including the genu of corpus callosum, the body of corpus callosum, bilateral anterior corona radiation, the left posterior corona radiata and the right of superior corona radiata in HA group. (P＜0.01, corrected by TFEC and FWE) within these regions the HA group showed increased RD and decreased AD. (P＜0.01) There were no regions showed significant increase. (P＜0.01) There was no significant correlation between each DTI indices and duration or dose of heroin use and duration of abstinence. (P＜0.05). Conclusions: White matter integrity significantly reduced in extensive regions among heroin addicts under short-time abstinence. the pathological features may include the abnormalities both in myelin and axonal. The involved brain areas mainly related to reward and cognitive controls. These findings may underline the high relapse rate in heroin addicts under short-time abstinence.]]></description>
<pubDate>Fri,20 Feb 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Study of structural asymmetry in language-related areas of the human cortex]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.02.005</link>
<description><![CDATA[Objective:  This investigation analyzes the structural asymmetry in the human language-related cortex by means of structural magnetic resonance imaging. Materials and Methods: High-resolution three-dimensional T1 structural MRI scans were obtained from 60 participants. 5 regions of interest (ROIs) were selected: pars opercularis (POp), pars triangularis (PTr), anterior transverse temporal gyrus /Heschlʼs gyrus (HG), planum temporale (PT) and insula. A Freesurfer post processing pipeline was employed to perform surface reconstruction and measurements of cortical thickness (CT), cortical surface area (CSA) and cortical volume (CV). Differences between two sides of the anatomical measurements and laterality index (LI) of every ROI were analyzed. The correlation analysis was performed for the three measurements and their LI. Results: A right asymmetry in the HG and a leftward asymmetry in the insula was observed for CT. The POp, HG, PT, and insula were significantly leftward asymmetry for CV and CSA. No significant correlations between CT and CSA were found. The correlation between thickness asymmetry and volume asymmetry was not significant. Significant positive correlation exists between CSA asymmetry and CV asymmetry for all ROIs. Conclusions: The cortical architecture of language-related areas mainly showed a leftward asymmetry. CT and CSA were independent traits, and CV asymmetry was determined mostly by CSA asymmetry.]]></description>
<pubDate>Fri,20 Feb 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Analysis of the clinical and MRI characteristics in patient with acute transverse myelitis]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.02.006</link>
<description><![CDATA[Objective: To study the clinical and MRI characteristics of acute transverse myelitis (ATM) after the onset of symptoms. Materials and Methods: The clinical information and MRI features of 56 cases with ATM during Jul.2006～Jul.2012 were analyzed retrospectively, and all patients with a follow-up duration longer than 2 years were identified. Results: (1) Fifty-six cases of ATM patients must have had at least one follow-up visit more than 2 years after the onset of symptoms. 19 cases (33.9 %, 19/56) for multiple sclerosis (MS), 10 cases (17.9%, 10/56) for neuromyelitisoptica (NMO), 3 cases  (5.4%, 3/56) for systemic autoimmune disease，4 cases (7.1%, 4/56) for parainfectious and 20 cases  (35.7%, 20/56) foridiopathic were clinically defined. (2) All patients had varying degrees of motor, sensory and autonomic dysfunction below the level of the cord lesions. (3) MRI features: The cervical cord was involved in 18 cases.The thoracic cord was involved in 17cases.The cervical and thoracic spinal cord was all involved in 13 cases.The thoracic and lumbar spinal cord was involved in 8 cases. Thirty-three cases of lesions were associated with swelling, and in other 23 cases the spinal cord showed normal appearance. The average lesion length was 4.7 spinal segment, 29 cases were involved more than two-thirds of the cross-sectional area of the spinal cord, 27 cases occupied less than two-thirds of the cross-sectional area. Contrast-enhanced MR scanning demonstrated that non-enhancement was seen in 15 cases, patchy or strip enhancement were revealed in 41 cases. Conclusions: The combination of clinical characteristics and MRI featurescan improve the diagnosis and differential diagnosis with ATM.]]></description>
<pubDate>Fri,20 Feb 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[The value of quantitative dynamic contrast enhanced magnetic resonance imaging (DCE-MRI) for differential diagnosis between malignant epithelial tumors and pleomorphic adenoma of lacrimal gland]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.02.007</link>
<description><![CDATA[Objective: To evaluate the value of dynamic contrast enhanced magnetic resonance imaging(DCE-MRI) for differential diagnosis between malignant epithelial tumor and pleomorphic adenoma of lacrimal gland. Materials and Methods: DCE-MRI data of 20 patients with pathologically confirmed malignant tumor and adenoma of lacrimal gland were retrospectively analyzed. Eight were benign and 12 were malignant. DCE-MRI was analyzed with the pharmacokinetic model proposed by Tofts and Kermode. There were three DCE quantitative parameters: Ktrans (volume transfer constant), Kep (rate constant) and Ve (extravascular extracellular space volume ratio). The dynamic curve was also analyzed. Z test was used to compare the different parameters between two groups.Chi-square test was used to analyze the difference of dynamic curves between groups. Receiver operating characteristic (ROC) curve was used to analyze the accuracy of parameters for  differentiation of the two kinds of tumors. Results: Type of rapid washed in-platform was seen in 6 and 3 cases of pleomorphic adenoma and malignant tumor, respectively.Type of rapid washed in-slowly washed out was seen in 2 and 9 cases of pleomorphic adenoma and malignant epithelial tumors.Value of Ktrans, Kep in malignant tumor were significantly higher than those of adenoma (Z=－2.533, －2.248, P＜0.05). Ktrans is more sensitive than Kep to differentiate the pleomorphic adenoma and malignant epithelial tumors. When the cut off of Ktrans is 0.10, the sensitivity and specificity were 91.9% and 79.8%. Conclusions: Ktrans has a certain role in differential diagnosis for malignant epithelial tumor and pleomorphic adenoma of lacrimal gland.]]></description>
<pubDate>Fri,20 Feb 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Study of magnetic resonance imaging in the evaluation of left and right global function of patients with hypertrophic cardiomyopathy]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.02.008</link>
<description><![CDATA[Objectives: To evaluate the global function of the left and right ventricle using MRI in the patients with hypertrophic cardiomyopathy. Materials and Methods: Twenty-six patients who were diagnosed with hypertrophic cardiomyopathy were collected. All the patients and twenty volunteers were performed cardiac magnetic resonance. All the images were analyzed by two radiologists using the software of ReportCARD3.6. The end-diastolic volume(EDV), end-systolic volume(ESV), stroke volume(SV) , ejection fraction(EF) and fractional shortening(FS) were acquired. The global function of the left and right ventricle  of patients and volunteers were compared with independent-sample t test. Results: Respectively, the left EDV、ESV、EF、 SV and FS of patients’were (88.94±13.29) ml、(24.75±7.31) ml、(71.70±7.60) %、(64.20±12.82) ml、(52.52±8.83) %, respectively, the left EDV、ESV、EF、SV and FS of volunteers’were (107.93±12.62) ml、(34.18±3.6) ml、(67.25±4.48) %、(73.65±12.41) ml、(36.8±3.82) %, EDV、 ESV、SV were lower than that of volunteers, there is significant difference between the two groups; EF was higher than that of volunteers, but there is no significant difference between the two groups; FS were higher than that of volunteers, there is significant difference between the two.Respectively, the right EDV、ESV、EF、SV of patients’were (88.48±17.67) ml、(29.84±7.50) ml、(64.65±10.27) %、(58.66±17.09) ml, respectively, the right EDV、ESV、EF、SV of volunteers’were (142.31±23.62) ml、(72.49±16.13) ml、(49.18±5.6) %、(69.82±13.43) ml, EDV、ESV were lower than that of volunteers, there is significant difference between the two groups；EF was higher than that of volunteers, there is significant difference between the two; SV is lower than that of volunteers, there is no significant difference between the two. Conclusions: The change of left and right ventricular were similar. To hypertrophic cardiomyopathy patient, the left ventricle diastolic function decrease and the systolic function increase in the early time. Meanwhile, the right  ventricle diastolic function decrease and the systolic function increase.]]></description>
<pubDate>Fri,20 Feb 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Dynamic contrast-enhanced magnetic resonance imaging in differential diagnosis of solitary pulmonary nodules]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.02.009</link>
<description><![CDATA[Objective:  This study is to assess the value of hemodynamic parameters of DCE-MR imaging in differentiating solitary pulmonary nodules(SPNs). Materials and Methods: A total of 62 patients (42 malignant nodules, 13 benign nodules and 7 active infections) with SPNs underwent DCE-MRI exams before bolus injection and after 15 phases since bolus injection of Gd-BOPTA , at the rate of 30 seconds. From the temporal-signal curves, the following analysis were taken: signal enhancement ratios at 1, 2, 4 minutes after bolus injection (SI1%、SI2% 、SI4%) and the maximum enhancement ratio( MER ); time at the maximum enhancement ratio (Tmax ); the steepest slope of time-signal curves (SS) and washout ratio. Results: It was found that SI1%、SI2%、SI4%、MER、SS for the malignant SPN group were significantly higher than those for the benign SPN group and significantly lower than those for the active infection group(P＜0.05). With 2.23 and 0.63 as the threshold maximum enhancement ratio for distinguishing malignant nodules from benign nodules and active infection, the sensitivity, nagative predictive value, accuracy is 100%、100%、92%, respectively. Diagnostic accuracy is further improved combined with morphologic features of nodules. Conclusions: The hemodynamic parameters and morphologic characteristics of DCE-MRI may be a useful tool in differentiating malignant SPN from active infection SPN, as well as benign SPN.]]></description>
<pubDate>Fri,20 Feb 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Correlations between apparent diffusion coefficient values and histopathologic classification of breast invasive ductal carcinoma]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.02.010</link>
<description><![CDATA[Objectives: The aim of this study was to evaluate the correlation between apparent diffusion coefficient (ADC) values and histopathologic classification of breast invasive ductal cancer. Materials and Methods: Sixty-six cases of breast cancer conformed by histopathology with histopathologic classification were involved in this retrospective study. The ADC values of lesions were measured and the mean (ADCmean) and minimum (ADCmin) of regions of interest (ROIs) were taken. The cases were divided into two groups, histopathologic classification and prognostic recurrence, according to the treatment and prognosis (histopathologic classification, lymph node status). The correlation was analyzed by using SPSS19.0 software (one-way ANOVA, LSD test and Spearman’ rank correlation coefficient method). Results: There were two groups, histopathologic classification group and prognostic recurrence group, which were divided three stages, respectively. ADCmean were 0.993×10-3 mm2/s、 0.969×10-3 mm2/s、0.926×10-3 mm2/s, respectively, while ADCmin were 0.849×10-3 mm2/s、0.660×10-3 mm2/s、0.535×10-3 mm2/s in the former group, respectively, ADCmean were1.014×10-3 mm2/s、1.029×10-3 mm2/s、0.919×10-3 mm2/s, respectively, while  ADCmin were 0.918×10-3 mm2/s、0.750×10-3 mm2/s、0.540×10-3 mm2/s in the latter group, respectively. ADCmean had no correlation with either histopathologic classification group or prognostic recurrence group. There was negative correlation between ADCmin and histopathologic classification group (r=－0.615, P=0.000) as well as prognostic recurrence group (r=－0.754, P=0.000). Conclusions: The ADCmin can be considered as an indicator of the development of medical plan before breast cancer surgery and the preliminary assessment of prognostic recurrence.]]></description>
<pubDate>Fri,20 Feb 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Quantitative assessment of vascular kinetics using perfusion-weighted MRI for the differentiation of prostate cancer in the peripheral zone]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.02.011</link>
<description><![CDATA[Objective: To assess vascular kinetics using perfusion-weighted MRI (PWI) in the differentiation of  prostate cancer  in the peripheral zone. Materials and Methods: Fifty-one patients with low T2 signal nodules in the prostate peripheral zone  underwent PWI-MRI at 3 T were included in these study. Ktrans, Kep and Ve were compared between prostate cancer and benign nodules. Receiver operating characteristic(ROC) curve analyses were performed to determine the diagnostic accuracy of Ktrans, Kep and Ve. Results: The average values of Ktrans, Kep and Ve for prostate cancer and begin lesions were (0.150±0.046) vs (0.086±0.037), (0.518±0.181) vs (0.325±0.142) and (0.288±0.147) vs (0.306±0.141), respectively. There was statistically significant difference in Ktrans, Kep between prostate cancer and begin noduless (P＜0.01). However, there was no statistically significant difference in Ve. The sensitivity, specificity for determining the prostate cancer of Ktrans, Kep were 86.11%、80.6% and 79.32%、75.9%, respectively. Conclusions: Quantitative assessment of vascular kinetics using PWI is useful in the differentiation of prostate cancer in the peripheral zone.]]></description>
<pubDate>Fri,20 Feb 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Design and comparison of pulse sequence for detection of γ-aminobutyric acid using double quantum filter at 7 T MR spectroscopy]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.02.012</link>
<description><![CDATA[Objective: In this paper, the Double Quantum Filter (DQF) sequence and its functions and detection efficiency in measuring γ-aminobutyric acid (GABA) are studied, compared and developed in phantom experiments.The result can provide a basis for later human clinical. Materials and Methods: A point-resolved spectroscopy (PRESS) -localized double quantum filter (DQF) was applied to the detection of GABA at 7 T Magnetic resonance spectrum (MRS). At the same time, the detection efficiencies of different sequences were compared by changing the RF pulse waveform (Sinc and Gauss) of DQF in phantom experiments. Results: In phantom experiments, the optimal echo time, the editing efficiency and the degree of suppression of uncoupled resonances were examined after numerical analysis of the editing performance. Conclusions: Excellent GABA signal retention at 3.01 ppm and robust suppression of the signals of the overlapping metabolites was achieved due to Double Quantum Filter (DQF) sequence. The spectral editing efficiency was measured to be 30%-40%. The detection effect was different for using different RF pulse. It is noticed that the detection efficiency of Gauss RF pulse is reasonably high. The  suppression effect of Cr was obvious. The Cho can be suppressed effectively, too. In our experiments, we found that different TR (Repetition time) or TE (Echo time) has different effects on the results of MRS detection efficiency in measuring γ-aminobutyric acid.]]></description>
<pubDate>Fri,20 Feb 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Present research situation of diffusion kurtosis imaging and intravoxel incoherent motion of the brain]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.02.013</link>
<description><![CDATA[Magnetic resonance imaging (MRI) is widely applied in assessing the changes of function and anatomical structure of the brain. Diffusion kurtosis imaging (DKI) is a new and promising diffusion imaging technique, which expands from diffusion tensor imaging (DTI) towards quantification of non-Gaussian water diffusion. DKI has been demonstrated to be highly sensitve and directionally specific in probing the microstructure of biological tissues. Intravoxel incoherent motion (IVIM) is a new non-invasive MRI perfusion technique, which defines the ability to separate blood perfusion from true diffusion effects via a proper choice of the number and distribution of diffusion weightings, or b-values. This article will review and discuss the basic principles and the latest progresses of DKI and IVIM in brain imaging.]]></description>
<pubDate>Fri,20 Feb 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Pathophysiology and neuroimaging development of brain alterations in chronic mountain sickness]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.02.014</link>
<description><![CDATA[Chronic Mountain Sickness (CMS) is a disease of multiple organ and multi-system damage induced by polycythemia, and the brain is the most active oxygen consumption, and is also the earliest that appear clinical symptoms, patients usually see a doctor with headache, dizziness, poor memory. CT, MRI and other imaging techniques can understand the morphological and functional changes of brain in CMS, and have important significances for accurate diagnosis, timely treatment and assessment after treatment. The text will give a summary.]]></description>
<pubDate>Fri,20 Feb 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[The value of magnetic resonance diffusion weighted imaging in rectal cancer diagnosis]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.02.015</link>
<description><![CDATA[Rectal cancer is one of the most common malignant tumors. In China, the incidence rate showed an upward trend year after year, seriously affecting people's health and quality of life. Accurate staging is essential for determining the optimal treatment strategies and planning appropriate surgical procedures. MRI is the most commonly used imaging method. DWI could clearly show the lesions, judging the extent of tumor invasion and lymph node metastasis, evaluation of preoperative chemotherapy and radiotherapy, which plays an important role in the clinical.]]></description>
<pubDate>Fri,20 Feb 2015 00:00:00  GMT</pubDate>
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