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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=201808</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
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<title><![CDATA[Functional connectivity of persistent somatoform pain disorder in thalamus: A functional magnetic resonance imaging study]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.08.001</link>
<description><![CDATA[Objective: To investigate the relationship between thalamus and whole brain functional connectivity in patients with persistent somatoform pain disorder (PSPD) and to explore the relationship between PSPD functional connectivity strength and pain level. Materials and Methods: 18 patients with PSPD and 16 healthy controls with matched age, sex, and education levels were enrolled in resting state functional magnetic resonance scan. We separately choose bilateral thalamus as ROI and observe the functional connections between the thalamus and the whole brain in both PSPD patients and healthy controls. Furthermore, Pearson's linear correlation analysis was performed with varying functional connections and pain level. Results: Compared with the healthy controls, the functional connectivity between the thalamus and the left triangle inferior frontal gyrus, left orbital inferior frontal gyrus, left putamen, and the left caudate was enhanced in PSPD. However, the functional connectivity between the left thalamus and the right inferior temporal gyrus was decreased. In addition, the functional connectivity between the right thalamus and the left caudate was significantly negatively correlated with pain level. Conclusions: There are abnormalities in thalamus-related functional connections in PSPD, which may be one of the causes of the persistent somatoform pain.]]></description>
<pubDate>Mon,20 Aug 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Research progress of task-state and resting-state functional magnetic resonance imaging in neuropsychiatric systemic lupus erythematosus]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.08.002</link>
<description><![CDATA[Systemic lupus erythematosus (SLE) is called neuropsychiatric lupus (NPSLE) when it is involved in the central nervous system. It seriously affects the quality of patient's life, and is a major cause of disease and death. Early diagnosis and early clinical intervention are the key to improve the prognosis of the patients. Functional magnetic resonance imaging (fMRI) can not only detect the abnormal brain function in the early stage in SLE patients, but also have some advantages in revealing its pathogenesis. In this paper, the application and progress of task-state and resting-state functional magnetic resonance imaging in neuropsychiatric systemic lupus erythematosus are reviewed.]]></description>
<pubDate>Mon,20 Aug 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[The application of functional magnetic resonance imaging to optic neuritis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.08.003</link>
<description><![CDATA[Functional magnetic resonance imaging (fMRI) is a novel technique for imaging examination of the nerve, which can reflect the functional state of the brain immediate. This technology is widely used in the diagnosis and treatment of various diseases of the nervous system now. Optic neuritis (ON) is a common ophthalmic disease that causes visual impairment in patients, and this paper will give a brief review on the application of fMRI in ON.]]></description>
<pubDate>Mon,20 Aug 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Principle, method and application of pRF technique in BOLD-fMRI]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.08.004</link>
<description><![CDATA[The traditional retinotopic mapping used the traveling wave method and functional magnetic resonance imaging to study the topological mapping relationship between the retina and the visual cortex, and achieved a huge of finding in the division and function of human visual cortex non-invasively. Recently, combined with functional magnetic resonance imaging, a model of the population receptive field (pRF) were developed, and estimated the visual field maps more accurate than those obtained using conventional visual field mapping. Importantly, more detail characteristics about the pRF of visual field were found in laterally studies. In addition to functional of visual cortex, pRF technique has been widely applied on visual attention and visual disorders of clinical diseases. However, this technique was still rarely reported in depth in China. In this review, we main focused on the pRF technique which is the latest progress of fMRI in the field of vision.]]></description>
<pubDate>Mon,20 Aug 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[A review of methods and clinical applications for dynamic functional connectivity analysis based on resting-state functional magnetic resonance imaging]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.08.005</link>
<description><![CDATA[Functional brain connectivity analysis based on resting-state functional magnetic resonance (fMRI) has been widely used in clinical medicine for studying neural mechanism and developing new diagnosis methods. Traditionally, functional connectivity is assumed to be static in time, but recently researchers have found that the dynamic characteristics of functional connectivity are functionally and clinically relevant for they can provide more information about the brain networks than static functional connectivity. Therefore, the study of dynamic functional connectivity (dFC) has attracted more and more interests. Many clinical studies have shown that dynamic functional connectivity analysis can provide a better proof for the pathologic exploration and auxiliary diagnosis of clinical diseases, but there are still many problems and limitations. This paper is aimed to systemically review existing methods for estimating dFC and extracting dFC features as well as the validating, the reliability and the statistical analysis of dFC analysis. Lastly, we introduced the applications of dFC analysis based on resting-state fMRI in diagnosis of clinical diseases.]]></description>
<pubDate>Mon,20 Aug 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Application of MRI diffusion tensor imaging in temporal lobe focal cortical dysplasia]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.08.006</link>
<description><![CDATA[Objective: To investigate the diagnostic value of diffusion tensor imaging (DTI) in focal cortical dysplasia (FCD). Materials and Methods: A total of 45 patients confirmed by pathology of FCD and 45 healthy controls were involved in this study. After reviewing their magnetic resonance imaging (MRI) and DTI imaging data, the fraction anisotropy (FA) and apparent diffusion coefficient (ADC) values measured in typical lesions and symmetrical area and the same side of healthy controls. Pearson test was used to test the correlation between the FA and ADC values in the bilateral cortical and white matter areas of the patients. Duncan test was used to test difference between the results of two parameters of different types of FCD. Paired t test was used to compare the data difference between the patient side and the healthy side, and the same side area of the control group. Receiver operating characteristic curve (ROC) was drawn to compare the ability of MRI scan and DTI to detect FCD positive expression in cortical group. Results: The results of Pearson test showed that there was no significant correlation between the measured values of FA and ADC in the cortex (P＞0.05), and there was a negative correlation between the values of the white matter region (P＜0.05). The results of Duncan variance analysis showed that there was no significant difference in the measured values of FA and ADC of different types of FCD (P＞0.05). Paired t test results showed that: for FA measurements, there was no significant difference (P＞0.05) between the cortex diseased side and the healthy side and the ipsilateral area of control group, while the values of the white matter diseased side were significantly lower than those in the contralateral side and the ipsilateral area of control groups (P＜0.05); for ADC measurements, the diseased side of cortex and white matter values both were significantly higher than that of the healthy side and the ipsilateral area of contorl group (P＜0.05). The results of McNemar test showed that the positive detection rate of ADC value (77.8%) in cortical area was more sensitive than MRI and FA. Kappa consistency test showed that the detection ability of ADC value (Kappa=0.802, P＜0.05) was the highest with FCD pathology. Conclusions: The pathological findings of FCD in cortex and white matter are quite different. FA and ADC can reflect the microscopic structure details of the tissue to varying degrees, but they are poorly effective in assisting the pathological typing. DTI technology, especially ADC value, can provide unique value for the diagnosis of FCD, it is recommended to be widely used in clinical practice.]]></description>
<pubDate>Mon,20 Aug 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Preliminary evaluation of main pulmonary artery changes in CMS patients with phase contrast MR imaging]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.08.007</link>
<description><![CDATA[Objective: To evaluate the clinical application value of structure and hemodynamics of main pulmonary artery (MPA) and mean pulmonary artery pressure (MPAP) in patients with chronic mountain sickness (CMS) by using phase contrast MR imaging (PC-MRI). Materials and Methods: 22 male adult patients with CMS (CMS group) and 20 healthy male adult volunteers (control group) from the same altitude were recruited. The 2D/QF sequence of Philips 1.5 T magnetic resonance scanner was used for main pulmonary artery to obtain its cross-sectional area (CSA), peak positive velocity (PPV), peak negative velocity (PNV), right ventricular stroke volume (RVSV) and regurgitant fraction (RF). Then, relative dilatation degree (RDD) and MPAP were calculated. Results: (1)Structure parameters: the CSA and RDD of CMS group were (7.52±0.71) cm2 and (36.11±11.27)% respectively, and those of the control group were (6.34±1.12) cm2 and (52.08±7.54)% respectively. CSA increased by (P＜0.01) compared with the control group, and RDD decreased by (P＜0.01). (2) Hemodynamics parameters: the PPV, PNV, RVSV and RF of the CMS group were (72.19±9.41) cm/s, (28.61±4.16), (64.43±21.48) ml and (7.11±0.93)% respectively, and those of the control group were (80.32±11.15) cm/s, (22.64±6.14), (59.12±19.34) ml and (4.31±0.48)% respectively. The PPV decreased by (P=0.015) compared with the control group, the PNV increased by (P＜0.01), the RVSV increased by (P=0.411), the RF increased by (P=0.004). (3)MPAP (36.71±12.36) mmHg in the CMS group was significantly higher than that (15.77±6.69) mmHg in the control group by (P＜0.01). Conclusions: Long-term hypobaric and hypoxic conditions in CMS patients resulted in MPA dilatation, flexibility decrease, changes of blood flow velocity and increase of RF and MPAP. PC-MRI can non-invasively and accurately provide the information of the MPA structure, hemodynamics and pressure, so as to preliminarily achieve the purpose of assessment of the characteristics of the MPA changes in CMS patients.]]></description>
<pubDate>Mon,20 Aug 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Diagnostic value of time-spatial labeling inversion pulse (Time-SLIP) unenhanced MR angiography in renal artery]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.08.008</link>
<description><![CDATA[Objective: To investigate the diagnostic value of non-contrast-enhanced magnetic resonance angiography (MRA) with time-spatial labeling inversion pulse (Time-SLIP) for the assessment of renal artery. Materials and Methods: Thirty-six patients in the suspicion of renal artery stenosis (RAS) were evaluated with Time-SLIP MRA using a 1.5 T scanner. The image quality and the degree of RAS in Time-SLIP MRA were evaluated. The results from Time-SLIP MRA images were compared with those from CTA or DSA. Results: Seventy-one renal arteries were included in the study. The image quality of MRA was scored as excellent in 72% (51 of 71), good in 24% (17 of 71) and poor in 3% (3 of 71) of patients. The sensitivity and specificity of Time-SLIP MRA for the detection of RAS were 100% and 98.2%, and for the detection of significant RAS (≥50%) were 90% and 98.4%. In quantitative assessments of the degree of RAS, the correlation between Time-SLIP MRA and CTA/DSA was excellent using Spearman rank-order correlation coefficient (r=0.959, P＜0.01). Time-SLIP MRA showed a slight overestimation of the degree of stenosis by the Bland-Altman plot [mean bias, (3.31±10.04)%]. Conclusions: Time-SLIP MRA is an accurate method for assessment of renal artery.]]></description>
<pubDate>Mon,20 Aug 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Application of quantitative parameters of dynamic contrast-enhanced MRI in the diagnosis of early prostate cancer]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.08.009</link>
<description><![CDATA[Objective: To evaluate the diagnostic value of quantitative parameters of dynamic contrast enhanced-magnetic resonance imaging (DCE-MRI) for early prostate cancer, and evaluate the correlation among quantutative parameters and microvascular density (MVD), Gleason score. Materials and Methods: Eighty-five patients with prostatic diseases, including 49 patients with early prostate cancer and 36 patients with benign prostatic hyperplasia, undergoing DCE-MRI examination were enrolled in the study, region of interest (ROI) were drawn on areas of cancerous foci, hyperplasia in the central gland and noncancerous foci in the peripheral zone to measure the values of volume transfer contrast (Ktrans), rate contrast (Kep). The values of the two parameters in the different tissues were compared with Kruskal-Wallis H and Mann-Whitney U; the diagnosis vallue of each parameter for early prostate cancer was evaluated by receiver operating characteristic (ROC) curve; The correlation between the two parameters and MVD, Gleason score were assessed with Pearson correlation. Results: The values of Ktrans, Kep were (0.37±0.15) min-1, (1.29±0.29) min-1 respectively for cancerous foci, (0.32±0.12) min-1, (1.20±0.24) min-1 respectively for hyperplasia in the central gland and (0.15±0.59) min-1, (0.45±0.18) min-1 respectively for noncancerous foci in the peripheral zone. The values of Ktrans and Kep for cancerous foci and hyperplasia in the central gland obviously higher than those for noncancerous foci in the peripheral zone (P＜0.05). The Ktrans and Kep of cancerous foci were not obviously higher than those for hyperplasia in the central gland (P＞0.05). The area under curve (AUC) of Ktrans and Kep for early prostate cancer was 0.770 and 0.796 respectively. There were significantly positive correlation among the two parameters and MVD, Gleason score (P＜0.05). Conclusions: The values of Ktrans and Kep have moderate value in the diagnosis of early prostate cancer, they can differentiate cancerous foci and peripheral zone noncancerous foci, but not differentiate cancerous foci and central gland hyperplasia. In addition, the value of Ktrans and Kep can be used as a prognostic indicator for patients with early prostate cancer.]]></description>
<pubDate>Mon,20 Aug 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[The study of susceptibility weighted imaging of amyloid plaques and iron deposits in the brain of APP/PS1 transgenic AD mice]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.08.010</link>
<description><![CDATA[Objective: The aim is to apply the three dimensional enhanced magnetic sensitive imaging (3D-enhanced susceptibility weighted angiography, ESWAN) technology to detect APPswe/PSEN1de9 gene mutant mice (purchased from the United States Jackson that referred to as APP/PS1 transgenic mice) average phase values from different parts of the brain (mean phase value, MPV), and to explore its and ferritin and correlation of the distribution of amyloid plaques. Materials and Methods: APP/PS1 mutant mice and wild-type control mice underwent T1WI, T2WI and ESWAN sequence scanning to measure MPV in the cerebral cortex, hippocampus and thalamus of mice. Immunohistochemical staining of iron protein and Aβ protein in rat brain tissues was carried out, and the percentage of the number and area of stained plaques in the area of interest were counted respectively. Pearson correlation was used to analyze the MPV, patch number and patch area percentage in the ROI region. Results: The MPV values in the cortex area (t=-2.201, P=0.045) and hippocampal area (t=-2.524, P=0.024) of both APP/PS1 dual-transgenic mice and control mice were statistically different. There was no statistically significant difference in MPV between APP/PS1 dual transgenic mice and control mice in thalamus region (t=-2.094, P=0.055). The number and range of iron protein plaques and MPV in each group of APP/PS1 dual-transgenic mice were significantly correlated (P＜0.05). The amount and range of amyloid plaques and ferritin were correlated (P＜0.05). Conclusions: The mean phase value in the brain of transgenic mice with APP/PS1 was significantly correlated with iron deposition in the brain. The iron deposition in the cerebral cortex, hippocampus and thalamus continued in the APP/PS1 dual transgenic mice, and was associated with the formation of amyloid plaques.]]></description>
<pubDate>Mon,20 Aug 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Research progress of MRI in pain and periaqueductal grey]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.08.013</link>
<description><![CDATA[The inhibition and promotion mechanism of pain can precisely adjust the excitability of the neural circuit involved in the overall pain experience, and the disorders of the pain in the circuit can lead to chronic pain. The periaqueductal gray (PAG) which involved in both ascending and descending pain modulation systems is an important node in the descending pain modulatory system (DPMS). This article summarizes the research progress of pain-related PAG magnetic resonance imaging.]]></description>
<pubDate>Mon,20 Aug 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Advances in intracranial aneurysms by high resolution magnetic resonance vessel wall imaging]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.08.014</link>
<description><![CDATA[Traditional imaging techniques, such as digital subtraction angiography (DSA), computer tomography angiography (CTA) and magnetic resonance angiography (MRA), can detect and locate intracranial aneurysms and can also evaluate its morphological features. However, these techniques have great limitations in the assessment of the vessel wall characteristics of aneurysm itself. In recent years, high-resolution vessel wall imaging (HR-VWI), combined with the pathological features of the vessel wall, has been gradually applied on the observation and analysis of vessel wall. Then the stability of intracranial aneurysms can be directly evaluated qualitatively. In this review we discuss the application of HR-VWI in various types of intracranial aneurysms.]]></description>
<pubDate>Mon,20 Aug 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Application progress of radiomics in breast cancer]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.08.015</link>
<description><![CDATA[With the increasing incidence and mortality of breast cancer, improving the accuracy of its early diagnosis has become a clinical problem to be solved. Radiomics is a noninvasive technology of high-throughput extraction features. In recent years, its application in clinical diagnosis and treatment has drawn wide attention and research. This article reviews a large number of literatures and reviews the progress of the research on the application of radiomics in breast cancer.]]></description>
<pubDate>Mon,20 Aug 2018 00:00:00  GMT</pubDate>
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