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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=201702</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
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<title><![CDATA[A correlation study between the cerebral perfusion of arterial spin labeling of MRI and neuropsychological scale in patients with Alzheimer<sup><sup>,</sup></sup>s disease and mild cognitive impairment]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.02.001</link>
<description><![CDATA[Objective: To investigate the changes of cerebral blood flow perfusion, cognitive function and the relationship between AD and MCI patients. Materials and Methods: Xuanwu Hospital of Capital Medical University neurology memory disorders clinic diagnosed 30 AD patients and 30 MCI patients and 30 cases with age, sex and level of education that match the normal old people as control group (NC group). Using 2D continuity ASL (arterial spin labeling) semi-quantitative measurement of local cerebral blood flow and neuropsychological scale joint assessment of cerebral perfusion in patients with AD and cognitive status. The cognitive state and the characteristics of cerebral perfusion of the three groups were analyzed, and the correlation between cognitive function and cerebral perfusion was analyzed also. Results: (1) The age, sex, years of education were compared in three groups of subjects, and the difference was not statistically significant (P＞0.05). The differences of MMSE and MOCA scores had statistical significance in three groups (P＜0.05). (2) The signal intensity of the bilateral temporal, parietal lobes and corona radiata of cerebral white matter in AD and MCI groups were reduced, the comparison of the three groups was statistically significant between the two-two groups. (3) The correlated analysis of the cerebral perfusion signal intensity and the MMSE and MOCA scores in AD and MCI patients, with two factors correlation analysis, found that the signal intensities of the bilateral temporal, and parietal lobes were positively correlated with MMSE and MoCA scores. Conclusion: (1) ASL provides an objective indicator for early diagnosis of AD and MCI in evaluating cerebral blood flow perfusion. (2)There was a good correlation between MMSE and MoCA scores and ASL cerebral perfusion of MRI, and the diagnostic accuracy of AD and MCI could be improved by the combination of the two examinations.]]></description>
<pubDate>Mon,20 Feb 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[The short-term effect of cigarette and coffee on regional cerebral blood flow measured with arterial spin labeling]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.02.002</link>
<description><![CDATA[Objective: To investigate the short-term effects of smoking and drinking coffee on regional cerebral blood flow (rCBF) in healthy adults. Materials and Methods: Forty-one healthy male volunteers (age range 22—55 years old , average age 36.6±11.8 years old) were divided into two groups: 21 volunteers with smoking habit were selected into smoking group, 20 volunteers without smoking habit were selected into non-smoking group. All of them were performed with smoking test. 19 volunteers (age range 22—27 years old, average age 24.4±1.4 years old) were performed with drinking coffee test. Before and after test, measuring rCBF of occipital lobe, frontal lobe, temporal lobe’s gray matter and thalamus,basal ganglia with 3D-arterial spin labeling technology (3D-ASL). Results: (1) rCBF of 41 volunteers had no significant difference (P＞0.05) before and after smoking. (2) 21 smokers showed a lower rCBF than 20 non-smokers before smoking and rCBF in region of bilateral occipital lobe, temporal lobe, thalamus, left basal ganglia had significant difference (P＜0.05). (3) rCBF of 19 volunteers in region of bilateral occipital lobe, frontal lobe, temporal lobe gray matter and thalamus, basal ganglia showed significant decrease (P＜0.05) after drinking coffee. The decline rate was 14.5%, 16.5%, 11.6%, 16.5%, 17.6%, 15.7%, 14.0%, 14.3%, 14.4%, 15.4%, respectively. rCBF in the right temporal lobe had a significant change. Conclusion: To detect the short-term effect of smoking and intaking coffee on gray matters' rCBF in healthy adults based on 3D ASL technology, we found that drinking coffee can lead to an acute reduction in rCBF. Though somking had no short-term impact on rCBF, it can lead to rCBF's reduction in the long run.]]></description>
<pubDate>Mon,20 Feb 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Research progress of arterial spinlabeling in ischemic cerebrovascular disease]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.02.003</link>
<description><![CDATA[Ischemic cerebrovascular disease (ICVD) is a group of high incidence, high disability and high mortality disease, which is seriously endangering human health and the quality of life. Arterial spinlabeling (ASL) can reflect changes of cerebral blood perfusion noninvasively. It can provide reliable imaging evidence for the early diagnosis, treatment and prognosis of ICVD. This article will review and discuss the latest progress of ASL in ICVD.]]></description>
<pubDate>Mon,20 Feb 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Observing the changes of regional homogeneity in adults after sleep deprivation with different times by resting state fMRI]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.02.004</link>
<description><![CDATA[Objective: To investigate the changes of sleep deprivation (SD) with different times on human brain regional homogeneity (ReHo). Materials and Methods: Twenty-eight healthy individuals participated in this study. Resting-state fMRI scans were collected under rest wakefulness and 24 and 36 hours SD. The ReHo approach was employed to analyze the imaging data, and SPM8 was used to perform one-way ANOVA, with a P value＜0.001 (corrected FWE) and cluster size (k value)＞20 voxels considerate statistic significant. Results: Compared with rest wakefulness, mainly SD induced enhanced brain ReHo in the right fusiform, the frontal, temporal lobe and the left thalamus; decreased ReHo in the right precuneus, supramarginal and the left frontal middle lobe, postcentral. With SD times went on, enhanced brain ReHo were found in precuneus, angular and frontal sup medial; and decreased ReHo were found in the precentral gyrus, temporal lobe and medial frontal gyrus. Conclusion: SD caused abnormal changes in whole brain network changes by connection of multiple brain regions, especially the brain regions which are mainly in the frontal lobe, temporal lobe and thalamus. And the SD times can reflect the changes of ReHo in functional regions.]]></description>
<pubDate>Mon,20 Feb 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[The abnormal salience network of the brain in heroin addicts: A resting-state functional magnetic resonance image study based on independent component analysis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.02.005</link>
<description><![CDATA[Objective: To investigate the characteristics of the salience network in heroin addicts. Materials and Methods: Twenty-six heroin addicts and thirty-nine healthy controls were enrolled in the resting-state functional magnetic resonance imaging scan. Independent component analysis was used to identify the salience network from the image data, the difference in strength of functional connectivity within the core brain areas of salience network between the two groups was analyzed, then the relationship between total heroin consumption and strength of connectivity of differential regions was analyzed. Results: Compared with the healthy controls, the functional connectivity of the left insula was significantly greater in the heroin addicts. And the functional connectivity of insula was positively correlated with the heroin consumption (P=0.02, r=0.46). Conclusion: Long-term heroin use results in abnormally increased functional connectivity of salience network in heroin addicts. The salience network plays a key role in heroin addicitoin.]]></description>
<pubDate>Mon,20 Feb 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Study of functional connectivity of default mode network and frontoparietal network in neuromyelitis optica]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.02.006</link>
<description><![CDATA[Objective: To evaluate the difference of brain default mode network (DMN) and frontoparietal network (FPN) connectivity of neuromyelitis optica (NMO) by using independent component analysis (ICA), and the correlation with clincal score. Materials and Methods: Twenty NMO patients (NMO group) and twenty healthy controls (control group) underwent rest-state fMRI. The fMRI data were analyzed by using GIFT software, and the differences of functional connectivity (FC) between the two groups were compared with SPM8. The correlation between altered parameters of FC and expanded disability status scale (EDSS) scores, disease duration were further explored using the Pearson correlation coefficients. Results: Compared with the control group, the FC score of DMN in NMO group significantly decreased in the right middle frontal cortex and right middle occipital cortex, while increased in bilateral lingual gyrus, extended to right superior parietal lobule and left supplementary motor area; the FC score of FPN decreased in bilateral cuneus cortex, while no FC score increased area. In addition, the FC score changes of right lingual gyrus correlated with disease duration. Conclusion: The FC abnormalities in DMN and FPN in NMO patients may beprovide an evidence that the spinal cord and optic neuritis caused not only corresponding clincal symptoms but also brain hidden and widespread damage. Altered functional changes in multiple brain regions may be caused by the secondary spinal cord lesions of retrograde sensorimotor cortex lesions, demonstrate that the brain functional network is a complex interconnected network with both the process of damage and compensation.]]></description>
<pubDate>Mon,20 Feb 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Type 2 diabetes and apparent diffusion coefficients of the cerebral cortex associated with specific functions on brain MRI]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.02.007</link>
<description><![CDATA[Objective: To detect whether there is any change of apparent diffusion coefficients (ADC) levels in different sites of the brain, particularly in areas associated with the memory, the emotion and the vision in type 2 diabetic patients with retinopathy by measuring diffusion-weighted imaging (DWI). Materials and Methods: Conventional magnetic resonance imaging (MRI) and DWI of the brain were obtained from 40 diabetic patients: 20 patients with proliferative diabetic retinopathy (group Ⅰ), 20 diabetic patients with simple diabetic retinopathy (group Ⅱ) and 20 age-matched healthy volunteers (group Ⅲ). ADC values of midfrontal gyrus, superior temporal gyrus and cuneate gyrus were obtained. Results: There is no significant difference in routine T1 or T2 weighted imaging between the three group. The ADC values of bilateral midfrontal gyrus and superior temporal gyrus cortex significantly increased in group Ⅰ and Ⅱ compared to group Ⅲ (P＜0.05). The duration of disease positively correlated with ADC values of the right midfrontal gyrus in group Ⅰ and Ⅱ. Conclusion: We found increases in ADC values supporting the neuronal degeneration and poptosis in some regions, especially in midfrontal gyrus and superior temporal gyrus by DWI in the diabetic patients with retinopathy. This result supports the association between diabetic retinopathy and brain injury, and with the progression of disease, the brain injury may be further aggravation.]]></description>
<pubDate>Mon,20 Feb 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Value of 3.0 T MRI with conventional pulse sequences in lung cancer]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.02.008</link>
<description><![CDATA[Objective: To evaluate the image quality and clinical application of the routine magnetic resonance (MR) pulse sequences in lung cancer. Materials and Methods: Forty-three  cases of lung cancer had done MR examinations at 3.0 T MR. Scan sequences were as followed, T2WI/TSE-BLADE, T2WI/HASTE, T1WI/VIBE-DIXON, DWI/EPI. Analysed the motion artifact, bronchia, difference of lung lesions and secondary atelectasis of the different scanning sequence images. Results: The motion artifacts from respiration and pulsation on the HASTE images were better controlled than other three sequences, The motion artifacts appeared at a rate of 2% (1/43). Bronchia showed best in the TSE-BLADE sequence; TSE-BLADE-T2, HASTE-T2 and EPI-DWI could distinguish neoplastci foci and secondary atelectasis, identification rate was 72.7%, 81.8%, 81.8%, respectively, but there was no statistically significant difference between each other (table probability was 0.3446, 0.3446, 0.3446, P=1.0000). VIBE-T1 sequence failed to distinguish them. Conclusion: 3.0 T MR conventional pulse sequence image respectively have advantages and disadvantages, which can complement each other, can play its unique advantages in the chest imaging.]]></description>
<pubDate>Mon,20 Feb 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[The correlation between ADC value and DCE-MRI parameters of magnetic resonance imaging in different degree of differentiation of rectal cancer]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.02.009</link>
<description><![CDATA[Objective: To investigate the correlation between ADC value and the characteristics of dynamic contrast-enhanced MRI (DCE-MRI) parameters in the diagnosis of rectal cancer with different degree of differentiation. Materials and Methods: According to the degree of differentiation of the tumor, 102 cases of rectal adenocarcinoma were divided into: well differentiated group (n=23), moderately differentiated group (n=59) and poorly differentiated group (n=20). The DWI and DCE-MRI images of different groups were retrospectively analyzed, their ADCmean values, Ktrans, Ve and Kep values were measured, and the correlation between ADCmean value and Ktrans, Ve and Kep values in different groups was analyzed. Results: The values of ADCmean, Ktrans, Ve, Kep in well differentiation group were: (1.13±0.25) mm2/s, (0.28±0.09) min-1, (0.46±0.15), (0.67±0.18) min-1; The values of ADCmean, Ktrans, Ve, Kep in moderately differentiation group were: (0.94±0.05) mm2/s, (0.28±0.09) min-1, (0.52±0.24), (0.63 ±0.25) min-1; The values of ADCmean, Ktrans, Ve, Kep in poorly differentiation group were: (0.79±0.07) mm2/s, (0.40 ±0.08) min-1, (0.67±0.16), (0.66±0.15) min-1,  Kep values between the groups and Ktrans, Ve between the moderately-well differentiated group were not statistically significant (P＜0.05), and the rest were statistically significant (P＜0.05). In poorly and moderately differentiation group of rectal cancer, the ADCmean and Ktrans value was negatively correlated (rmoderately=0.34, rpoorly=0.60, P＜0.05). The Pearson analysis of ADCmean and Ve, Kep value in different differentiation group was P＞0.05, the difference was not statistically significant. With the increase of the degree of differentiation of rectal cancer, ADCmean value increased, Ktrans value decreased. Conclusion: (1) There was a certain correlation between ADCmean value and Ktrans value of rectal cancer in poorly and moderately differentiation group. (2) The correlation between ADCmean value and Ktrans value of the well differentiation group and the moderately and poorly differentiation group were different, which had important guiding significance to determine the pathological differentiation and malignant degree of rectal cancer.]]></description>
<pubDate>Mon,20 Feb 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[The MRI diagnosis of fetal intestinal obstruction]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.02.010</link>
<description><![CDATA[Objective: To observe fetal intestinal obstruction with MRI, compared with the  result of newborn surgery and pathology, explore the value of MRI in the diagnosis of fetal intestinal obstruction. Materials and Methods: Twenty-six cases of fetal intestinal obstruction were retrospectively analyzed, gestational age was  23—35 w, all cases were  performed fetal ultrasound before fetal MRI. 4 MRI sequences were used including 2D FIESTA (2D fast imaging employ steady acquisition), SSFSE (single-shot fast spin echo), FIRM T1WI (fast inversion recovery motion insensitive T1WI) and DWI (diffusion weighted imaging). According to the intestinal obstruction sites, bowel signal changes, distal intestinal filling, and mesenteric vessels changes, radiological diagnosis was made, the secondary imaging signs such as ascites and amniotic fluid were also observed. Follow-up the fetal birth and surgical treatment postnatal , analysed the MRI accuracy and the missed diagnosis rate, and investigated the advantage of each sequence in the diagnosis of fetal intestinal obstruction. Results: In the 26 cases of fetal intestinal obstruction, 16 cases were duodenum/jejunum stricture or atresia with 4 cases accompanied duodenum and jejunum malrotation, 4 cases were small intestinal meconium obstruction with 2 cases secondary volvulus and ischemia necrosis, 4 cases were anal atresia, 1 case was colonic stricture or atresia and 1 case was congenital megacolon. All fetuses were associated with amniotic fluid in different degree, some cases with pleural effusion, pericardial effusion and hydrocele testis. 2 cases with single umbilical artery. MRI diagnostic accuracy rate was 92.3% (24/26), the misdiagnosis rate was 7.7% (2/26). MRI can locate the fetal intestinal obstruction and observe the extent of bowel dilatation. SSFSE can clearly show mesenteric vessels, FIRM T1WI is helpful to diagnosis of colonic ileus, DWI can detect obstruction ischemic bowel through the intestinal signal. Conclusion: Fetal intestinal obstruction has characteristic radiological imaging, the obstruction site and cause can be judged through fetal MRI as well as the complications, which has important reference value for prenatal diagnosis and postnatal surgical treatment.]]></description>
<pubDate>Mon,20 Feb 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Quantification of myocardial T1 mapping in minipig with chronic myocardial ischemia]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.02.011</link>
<description><![CDATA[Objective: The purpose of this study is to quantify the myocardial T1 mapping values in minipig modelling for chronic myocardial ischemia. Materials and Methods: The minipigs were implanted the protein constriction ring (Ameroid) at left anterior descending artery to induce ischemia. The minipigs were scanned twice in a 3.0 T MRI scanner at the short axial slices of the apex, the papillary muscle, at the time of the baseline of the normal heart and at the 4th week after the operation with the chronic myocardial ischemia. The independent-samples t test was employed to analyze the difference of the T1 mapping values of the heart muscles between the two conditions. Results: In this study, 12 minipigs completed CMRI scan before modeling, The unenhanced myocardial average T1 values was (1108.9±10.5) ms, the mean myocardial T1 values were (1050.2±16.7) ms and (1139.7±54.4) ms respectively at the apex and papillary muscle myocardium, the difference was statistically significant. There were 11 minipigs completed CMR scan after modeling, the apical myocardial average T1 values was (1210.6±94.2) ms, it was higher than baseline, the difference was statistically significant. The mean myocardial T1 value of the papillary muscle was (1236.0±114.3) ms at chronic ischemia minipigs, no significant difference with baseline. Furthermore, statistically significant differences existed in the anterior and anteroseptal of the papillary muscle. Conclusion: The T1 mapping technique is valuable as a new important index for the diagnosis of chronic ischemic myocardium.]]></description>
<pubDate>Mon,20 Feb 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Evaluation of MRI T1 high resolution isotropic volume excitation technique in the diagnosis of cervical region]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.02.012</link>
<description><![CDATA[Objective: To explore the value of the THRIVE technique in the diagnosis of cervical region. Materials and Methods: Chose 80 patients with clinically suspected cervical disease, routine non-enhanced MRI scan, T1WI and THRIVE sequence used in the enhanced scan joint fat suppression were successfully completed in these patients by PHILIPS 3.0 T MRI. Using statistical method to test that, whether the statistical significance of the differences existed in the fat suppression and artifacts of the two techniques. Results: THRIVE technique used in the enhanced scan joint fat suppression is better than the T1WI sequence at the sides of the fat suppression and artifacts. Conclusion: The THRIVE technique joint fat suppression can eliminate the signal of fat perfectly, and also with less artifacts, even none. On the other side, it shows the detail in the structure and diseased region of neck, and can improve the value of MRI used in cervical region.]]></description>
<pubDate>Mon,20 Feb 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Role of dynamic susceptibility contrast-enhanced magnetic resonance imaging in differentiating glioma recurrence from radiation necrosis: a Meta-analysis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.02.014</link>
<description><![CDATA[Objectives: Using Meta-analysis to estimate the diagnostic value of differentiating glioma recurrence from radiation necrosis. Materials and Methods: We systematically searched PubMed, Embase, Web of Science, and Cochrane electronic databases to identify relevant published articles until June, 2016. English and Chinese language restrictions were applied. The data were analyzed by Meta-disc software. Results: Nine studies were used for general data pooling. The study included a total of 251 patients and 270 lesions. The pooled of DSC sensitivity was 0.89 (95% CI: 0.83, 0.93) and specificity was 0.88 (95% CI: 0.78, 0.94). Overall, positive likelihood ratio (PLR) was 4.47 (95% CI: 2.9-6.91; I2= 0, P＜0.001) and negative likelihood ratio (NLR) was 0.15 (95%CI: 0. 1-0.23; I2=0, P＜0.001). The pooled diagnostic odds ratio (DOR) was 33 (95% CI: 15.86, 68.66). The area under the receiver operating characteristic curve of DSC was 0.94 and the Q* index was 0.873. I2=0, representing a small heterogeneity between the 9 studies. Conclusion: Our Meta-analysis suggested that the rCBV values derived from DSC-MRI could be useful in differentiating glioma recurrence from radiation necrosis, DSC showed high sensitivity and specificity in differentiating glioma recurrence from radiation necrosis.]]></description>
<pubDate>Mon,20 Feb 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Advances of diffusion tensor imaging in fetal brain development]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.02.015</link>
<description><![CDATA[Fetal brain is extraordinarily complex and functional, yet its origin is a simple tubular structure at the end of 3 gestational week. During this period, it undergoes brain primitive induction development, nerve cells proliferation, neuronal migration, bilateral cerebral hemisphere stratum formation, ditch, crack, brain development, white matter fibers appearance and myelination. These developmental processes are extremely precise and complex, but follow a strict sequence. Prenatal ultrasound can only screen obvious congenital anomalies during early pregnancy, but has not yet assessed the development of these subtle brain structure. In recent years, the development of magnetic resonance imaging technology for the development of fetal brain provides a useful tool, in particular, diffusion tensor imaging provides a microstructure observation of fetal brain information perspective by detecting water dispersion movement of brain tissue. Histopathologic examination can provide complementary information. The advantages and application of DTI in fetal brain will be briefly introduced in this review. DTI can display the cortical lamellar structure and the time and sequence of white matter fiber bundles, the changes of connective fiber bundles of fetal brain, myelin maturation process and so on. The main technical problems and solutions of DTI technique for fetal brain imaging are also summarized, which will lay a theoretical foundation for the further application of diffusion tensor imaging in normal fetal brain development.]]></description>
<pubDate>Mon,20 Feb 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Progress of PWI<sup><sup>,</sup></sup> application in the brain damage of diabetes]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.02.016</link>
<description><![CDATA[Diabetic brain damage is a complication of diabetes in the central nervous system. The brain perfusion abnormalities is one of the manifestations of diabetic brain damage. Magnetic resonance perfusion imaging (PWI) can reflect the information of microcirculation, is divided into three categories, which are dynamic susceptibility contrast enhancement (DSC), dynamic contrast enhancement (DCE) and arterial spin labeling (ASL). With the development of magnetic resonance perfusion imaging, we get more early, comprehensive and accurate measurement of changes in the brain’s microcirculation. Especially, the ASL is a noninvasive method of PWI, it can be a quantitative and repeated way to meansure cerebral blood flow (CBF) and can avoid the risks bring by exogenous contrast agent effectively. ASL has been a powerful tool in diabetic research. This paper focuses on the research and application of PWI in the brain damage of diabetes.]]></description>
<pubDate>Mon,20 Feb 2017 00:00:00  GMT</pubDate>
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