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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=201804</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
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<title><![CDATA[Study on the correlation between the phase of the magnetic sensitivity of the deep nucleus of the brain and the MMSE in AD patients]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.04.001</link>
<description><![CDATA[Objective: To evaluate the iron deposition in deep brain nucleus of Alzheimer’s disease (AD) patients and determine its correlation with MMSE score using susceptibility-weighted imaging (SWI). Materials and Methods: From November 2015 to December 2016, 21 cognitively normal subjects (4 male, 13 female, age 47 to 82) and 17 patients (9 male, 12 female, age 48 to 78) with Alzheimer’s disease were scaned with both routine MRI sequences and SWI sequences using Philip Ingenia 3.0 T MRI. Software is used to generate SWI pictures. The phase value of caudate nucleus, substantia nigra, red nucleus, globus pallidus and putamen were measured in the corrected phase images. Then calculate the correlations between phase value and mini-mental state examination (MMSE) score. Statistical analysis is done by SPSS and MedCalc software package. First compare the phase value of caudate nucleus, substantia nigra, red nucleus, globus pallidus, and putamen between Alzheimer’s patients and control group. Then calculate the correlations between phase value and MMSE score (P＜0.01). Results: In SWI sequences, the phase value of right substantia nigra and bilateral caudate nucleus between AD patients and healthy people are significantly different (Pleft caudate nucleus＜0.001, Pright caudate nucleus=0.002, Pright substantia nigra=0.012). Correlation between iron deposition in right substantia nigra and bilateral caudate nucleus and MMSE score in AD patients were found. Conclusions: SWI technology can reflect the iron deposition in deep brain gray nucleus in AD patients respectively and non-invasively, thus helping the early diagnosis of AD.]]></description>
<pubDate>Fri,20 Apr 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[The application value of 1H-MRS in the treatment of hyperacute cerebral infarction by using short-TE scanning]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.04.002</link>
<description><![CDATA[Objective: To investigate the application value of magnetic resonance spectroscopy (MRS) in the treatment of hyperacute cerebral infarction by using stimulated echo acquisition mode and short echo time scan. Materials and Methods: The patients of hyperacute infarction treated with thrombolytic therapy or non-thrombolytic therapy underwent regular magnetic resonance and MR spectrum scan after 1 week of hospitalization. Then we respectively analyzed the ratios of NAA/Cr, Cho/Cr and NAA/Cho in the infraction center, the border region, the normal region around the lesion and the contralateral area. Results: (1) In the non-thrombolysis group, in the infraction center,the ratios of NAA/Cr, NAA/Cho decreased significantly, the ratios of Cho/Cr and mI/Cr were higher than in the border region, the ratio of Glx/Cr was higher than that in the contralateral area (P＜0.05). In the border region, the ratio of AA/Cr was lower than in the normal region around the lesion, and the ratio of NAA/Cho was lower than in the contralateral area (P＜0.05). The ratios of NAA/Cho, Cho/Cr and Glx/Cr in the infraction center and Lac/Cr in the border region were significantly correlated with the clinical NIHSS score (r=-0.626, 0.629, -0.689, 0.812, P＜0.05). (2)In the thrombolysis group, in the infraction center, the ratio of Cho/Cr was higher than in the border region. In the border region, the ratios of NAA/Cr, mI/Cr were lower than in the contralateral area, and the ratio of NAA/Cho was lower than in the normal region around the lesion. The ratios of NAA/Cho, Cho/Cr, mI/Cr and Glx/Cr in the infraction center and Lac/Cr in the border region were significantly correlated with the clinical NIHSS score (r=-0.686, 0.791, -0.757, -0.791, 0.735, P＜0.05). (3) In the thrombolysis group, the ratios of NAA/Cr, NAA/Cho and mI/Cr in the infraction center, the border region was significantly higher than in non-thrombolysis group, the ratio of Lac/Cr in the infraction center, the border region and the normal region around the lesion was lower than that in non-thrombolysis group, the ratio of Glx/Cr in the infraction center was significantly higher than in non-thrombolysis group. Conclusions: 1H-MRS can detect more metabolite changes by using short echo time scanning and more comprehensively detect the recovery of damaged brain tissue after the clinical treatment. It can objectively evaluate the effect of clinical treatment and prognosis of cerebral infarction, providing objective imaging evidence for clinical application.]]></description>
<pubDate>Fri,20 Apr 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Study of diffuse tensor imaging in patients with PSD based on TBSS technique]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.04.003</link>
<description><![CDATA[Objective: To investigate the microstructural abnormalities of white matter in patients with post-stroke depression (PSD) by using the method of tract based spatial statistics (TBSS).  Materials and Methods: Whole brain diffusion tensor imaging (DTI) was performed in 28 patients with PSD and 3 control groups, including 18 stroke patients without depression group (PSND), 13 patients with depression group (De) and 11 healthy volunteers (NC). Fractional anisotropy (FA) values were compared between the PSD group and 3 control groups by TBSS. Results: Compared with the 3 control groups, FA values of white matter in the left posterior limb of internal capsule and the splenium of corpus callosum were significantly decreased in the patients with PSD (P＜0.05). Inter-group differences with statistical significance were found at the left posterior limb of internal capsule in following: PSD vs NC group (P＜0.05); at the splenium of corpus callosum in following: PSD vs NC group (P＜0.05), PSD vs De group (P＜0.05). Conclusions: As the latest and higher credibility DTI research method, TBSS technology could be used to find the microstructural abnormalities of white matter integrity and disruption of neural connections among regions regulating mood and cognition in patients with early PSD.]]></description>
<pubDate>Fri,20 Apr 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Texture analysis of conventional MRI parameters for differentiating between hemangioma meningioma and hemangiopericytoma based on whole tumor measurement]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.04.004</link>
<description><![CDATA[Objective: To comparatively analyze the differences of T1WI, T2WI and contrasted T1WI signal intensity histogram parameter in the differential diagnosis of intracranial hemangioma meningioma (HM) and hemanyiopericytoma (HPC) based on entire tumor, and further to evaluate the differential diagnosis value between them. Materials and Methods: The conventional MRI data of 8 patients with HM and 9 patients with HPC proven by pathology or clinical follow-up were retrospectively reviewed. All patients underwent T1WI, T2WI and contrasted T1WI scan. The texture features of lesions based on axial T1WI, T2WI and contrasted T1WI were extracted by post-processed 3D ROI with Omni-Kinetics software. The texture parameters were compared using two independent samples t test and Mann-Whitney U test between groups. Receiver operating characteristic curve (ROC) was constructed to assess the differential ability of the significant parameters between HM and HPC. Results: Min intensity, mean value, mean deviation, skewness, median intensity, RMS, uniformity, the 5th, 10th, 25th, 75th and 90th percentiles of contrasted T1WI have significant differences between HM and HPC (P＜0.05). Uniformity, skewness, the 5th, 10th, 25th, cluster shade and cluster prominence of T2WI have significant differences between the two (P＜0.05). According to ROC analysis, the uniformity of T2WI was the best parameters (cutoff value=0.79, AUC=1.0) for distinguishing HM and HPC of 0.79 with sensitivity of 88.9% and specificity of 100%. Conclusions: Texture analysis of T2WI and contrasted T1WI based on entire tumor should be helpful in differentiation of HM and HPC.]]></description>
<pubDate>Fri,20 Apr 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[The value of diagnosis of suspicious malignant breast lesions by magnetic resonance diffusion combined with perfusion imaging technique]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.04.005</link>
<description><![CDATA[Objective: To evaluate the value of diffusion-weighted imaging (DWI) and perfusion imaging in diagnosing breast lesions of the BI-RADS 4 diagnosed by mammography and compared them with histopathology. Materials and Methods: From May 2014 to May 2017, there were 95 breast lesions in 83 patients which were examed in Hebei General Hospital. Two high-seniority physicians retrospectively analyzed the MRI features of breast lesions and measured the apparent diffusion coefficient (ADC) and perfusion imaging quantitative parameters of all lesions. The variance analysis of the difference between benign and malignant lesions of ADC values was carried out. Results: These 95 lesions were divided into two groups according to histopathological diagnosis. There were 46 lesions in the benign lesion group, 49 lesions in the malignant lesion group. In these 2 groups, the average ADC value of the malignant lesion group was significantly lower than the other group (P＜0.05), and the average ADC value was significantly different (P＜0.05). The averages of Ktrans and Kep showed statistically significant differences in the perfusion quantitative parameters of benign and malignant lesions (P＜0.05). Conclusions: DWI technology and perfusion imaging technique can distinguish benign and malignancy effectively.]]></description>
<pubDate>Fri,20 Apr 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Evaluating hepatic function of hepatic alveolar echinococcosis with magnetic resonance diffusion weighted imaging: initial study]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.04.006</link>
<description><![CDATA[Objective: To evaluate the value of diffusion weighted imaging (DWI) and apparent diffusion coefficient (ADC) for evaluating hepatic function of hepatic alveolar echinococcosis (HAE).  Materials and Methods: Retrospective analysis ADC value and DWI imaging of 68 patients and 30 cases of normal people, who underwent routine liver MRI and DWI (b value were 0 and 600 s/mm2). The 68 cases of HAE patients were divided into 3 groups according to Child-Pugh classification criteria, A group has 45 cases, B group has 19 and C group has 4, the ADC value of the adjacent hepatic parenchyma was measured and standardized it with the ADC value of the cerebrospinal fulid at the same spinal cord level, that was ADCratio= ADC/ADCspinal canal. First, the correlation between ADCratio and Child-Pugh score was analyzed. Second, for the control group and case group what were used an independent-samples t test, while for the each case group what were used ANOVA. Results: The control group ADCratio was 0.29±0.03, while the case group ADCratio was 0.26±0.05, respectively, for the more, the ADCratio of group A was 0.27±0.04, the ADCratio of group B was 0.24±0.04 and the group C was 0.21± 0.03. The statistical results showed the ADC value of the case group was moderately correlated with the Child-Pugh score (r=0.432, P＜0.01). The control group and case group had significant difference (P＜0.01), the ADCratio of the group A, group B and group C also had significant difference (P＜0.01), but there was no difference between group B and group C (P＞0.05). Conclusions: ADC value could be an indication for evaluating hepatic function for those patients with HAE. With the hepatic function decreasing, the ADC value also decreased.]]></description>
<pubDate>Fri,20 Apr 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Multimodality MRI in differential diagnosis of mass-like lesions in the ileocecal region]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.04.007</link>
<description><![CDATA[Objective: To discuss the differential diagnosis value of MRI on common mass-like lesions in ileocecal region. Materials and Methods: MRI data of 64 consecutive patients with mass-like lesions in the ileocecal region confirmed by pathology were included in this retrospective study. The morphological features, DWI and blood supply were analyzed by blinded method. The differences between chronic inflammation, tuberculosis, cancer and lymphoma were compared. Results: The study included 25 cases of chronic inflammation, 12 cases of intestinal tuberculosis, 21 cases of intestinal adenocarcinoma and 6 cases of lymphoma. The morphological features, DWI and blood supply have some characteristics: (1) The intestinal wall thickness of lymphoma was higher than that of chronic inflammation, tuberculosis and adenocarcinoma group (P＜0.05), there was difference between adenocarcinoma and chronic inflammation group (P＜0.05), but no difference between adenocarcinoma and tuberculous group (P＞0.05). Benign lesions were prone to mucosal linear enhancement and concentric ring sign (P＜0.05). (2) The ADC value of chronic inflammation, tuberculosis, cancer and lymphoma decreased in turn, these four kinds of lesions were statistically different in group comparisons (P＜0.05), except intestinal tuberculosis vs adenocarcinoma (P＞0.05). Conclusions: The combination of multiple sequences of MRI had some value in differential diagnosis of mass-like lesions in the ileocecal region, and it can be used as an important complement to CT-atypical lesions.]]></description>
<pubDate>Fri,20 Apr 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Application of quantitative magnetic susceptibility weighted imaging in acute ischemic stroke]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.04.009</link>
<description><![CDATA[Susceptibility weighted imaging (SWI) is an imaging technology by using the difference of tissue magnetic susceptibility, which is very sensitive to anoxic blood and intracranial mineral deposition. It has been widely used in the diagnosis of acute ischemic stroke. However, SWI can not be used for quantitative determination of magnetic susceptibility. With the development of quantitative susceptibility mapping (QSM), this defect is gradually being made up. QSM is a new, non-invasive technique for assessing magnetic susceptibility differences between magnetic tissues in vivo based on magnetic gradient echo magnetic resonance phase data. It realizes the quantification of magnetic substances in the body by measuring the susceptibility value of the magnetic substances. Currently, it has a variety of applications in quantifying iron content, calcification and venous oxygen saturation in vivo. In this paper, the basic principle of quantitative magnetic susceptibility weighted imaging and its application in acute ischemic stroke are summarized.]]></description>
<pubDate>Fri,20 Apr 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Progress in the study of functional magnetic resonance imaging (fMRI) brain networks in the depression]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.04.010</link>
<description><![CDATA[In recent years, the development of functional magnetic resonance imaging technology has enabled researchers to study the structure and function of living brain tissue without invasive research, and the study of large scale brain structure and function network is necessary to study the occurrence and development mechanism of certain diseases. Currently, the study of brain network in patients with depression is still in the preliminary stage of exploration, the topological properties of brain network play an auxiliary role in early diagnosis and differential diagnosis of depressed patients, it can also be used as a measure of the severity of depression. Abnormal patterns of brain structure and function can also be used as sensitive features to diagnose related brain diseases, therefore, this paper will review the research results of brain structure and function of depressed patients from the perspective of brain network.]]></description>
<pubDate>Fri,20 Apr 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Progress of multimodal magnetic resonance imaging in left atrial appendage]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.04.011</link>
<description><![CDATA[Left atrial appendage is an important ancillary structure of the left atrium, the evaluation of structure and function of LAA in the treatment of atrial fibrillation, interventional surgery is essential. Multimodal magnetic resonance imaging can display the structure of the left atrial appendage and quantitatively measure the functional parameters. And it is increasingly used in evaluating the structure and function of the left atrial appendage. In this paper, the recent progresses of MRI in the study of LAA, including MRI parameters, anatomical structure and function, LAA thrombus and relevant risk factors, LAA interventional therapy were reviewed.]]></description>
<pubDate>Fri,20 Apr 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Compressed sensing and its application in cardiac magnetic resonance imaging]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.04.012</link>
<description><![CDATA[MRI is becoming more and more important in the diagnosis and differential diagnosis of cardiovascular diseases. However, the relatively slow scanning speed and susceptibility to motion artifacts are the main defects, which limit its clinical application to some extent. Compressed sensing (CS) is a new signal acquisition theory which is founded on the premise of reconstructing an image by acquiring less data through undersampling of k-space. Sparsity, incoherence sampling and nonlinear reconstruction are the necessary conditions for its applications. By combining compressed sensing technology, MRI can greatly improve the scanning speed without sacrificing the spatial resolution at the same time. Therefore, to some extent, it has unique advantages for cardiovascular magnetic resonance (CMR). In this review, the basic principle of compressive sensing and its application in cardiac magnetic resonance are reviewed in detail.]]></description>
<pubDate>Fri,20 Apr 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Research and progress of magnetic resonance imaging on coronary microembolization using animal models]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.04.013</link>
<description><![CDATA[Coronary microembolization (CME) occurs frequently in acute coronary syndrome and the process of percutaneous coronary intervention (PCI), which is very harmful for patients. In recent years, the number of patients receiving PCI in China has increased significantly, and the coronary microembolization after PCI also becomes more common than ever. Compared with other methods, magnetic resonance imaging (MRI) is a noninvasive method without ionizing radiation and has the advantages of high soft tissue resolution and "one-stop" inspection with cardiac anatomy and function information. MRI plays an important role in the study on coronary microembolization and can be used to assess myocardial function, perfusion abnormalities and myocardial activity related to coronary microembolization. Animal models of coronary microembolization were commonly used in-depth study on pathophysiology of CME and mechanism of relevant myocardial injury. This review focused on research and progress in MRI on coronary microembolization of animal models.]]></description>
<pubDate>Fri,20 Apr 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Progress in the application of different DWI exponential models for breast lesions]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.04.014</link>
<description><![CDATA[DWI is widely used in clinic because of its noninvasive, visual and quantitative reflection of tissue microstructure. With the development of DWI exponential model, including monoexponential model, biexponential model and stretched exponential model, scanning scheme optimization and development of post-processing function, it provides more imaging evidence for early detection, differential diagnosis, adjuvant therapy and predictive evaluation of breast cancer. The purpose of this article is to review the current status of the index models in the mammary gland, in order to improve the understanding of the value of DWI in the diagnosis of breast lesions.]]></description>
<pubDate>Fri,20 Apr 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Advances in application of IVIM-DWI in liver focal lesions]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.04.015</link>
<description><![CDATA[Concept of intravoxel incoherent motion imaging (IVIM) has demonstrated that the diffusion-weighted signal can be influenced not only by molecular diffusion but also by microcirculation. The sequence of the integrated specific slice dynamic Shim (iShim) is the improvement of the traditional echo planar imaging (EPI) sequence and the extension of the intravoxel incoherent motion imaging-diffusion weighted imaging (IVIM-DWI) sequence. Recent years, IVIM has been gradually used in clinical study, especially using in liver diseases. This article aims to review the latest research advances of IVIM-DWI in liver focal lesions.]]></description>
<pubDate>Fri,20 Apr 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Research advances in diffusional kurtosis imaging]]></title>
<link>http://www.med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.04.016</link>
<description><![CDATA[Diffusion kurtosis imaging (DKI) is an emerging diffusion index to quantify non-Gaussian diffusional process in vivo and an extension of the technology of diffusion tensor imaging, particularly having unique advantages for characterizing microstructure of tissues. The technology of DKI has been studied in the nervous system and has made good progresses. In recent years, DKI is gradually applied to the researches of other different systems and has also obtained preliminary results, which displayed certain clinical values. This article proposed to summary the technic principles and application advances in various systems for DKI.]]></description>
<pubDate>Fri,20 Apr 2018 00:00:00  GMT</pubDate>
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