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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=201511</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
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<title><![CDATA[The effect caused by interictal epileptic discharges on mesial temporal lobe epilepsy brain networks]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.11.001</link>
<description><![CDATA[Objective: To comprehensively assess the alterations of resting-state brain networks affected by interictal epileptic discharges (IEDs) in mesial temporal lobe epilepsy (mTLE), and to reveal the mechanism of brain function damages caused by IEDs in mTLE. Materials and Methods: Forty-five patients with bilateral mTLE underwent continuous EEG-fMRI during rest. Finally 35 fMRI sessions (left mTLE, n=18) with IEDs and individually paired non-IEDs sessions were acquired. Independent component analysis was used to investigate the alterations in different states of seven resting-state networks including the core network, dorsal attention network, executive control network, anterior and posterior default mode network, auditory network, visual network and sensorimotor network. Results: Paired t-test results showed, compared with non-IEDs state, the anterior cingulum cortex in core network showed increased coherence of brain activity and the auditory network showed decreased activity in both groups of mTLE. Apart from this, superior parietal gyrus in dorsal attention network showed reverse performance when the epileptic focus located in different sides of the brain. While it increased in left mTLE, but decreased in right mTLE. The middle temporal gyrus and post cingulum in posterior default mode network showed increased activity, while the middle frontal gyrus in anterior default mode network showed decreased activity in IEDs state in right mTLE. The middle cingulum in executive control network and middle occipital gyrus in visual network showed increased coherence of brain activity in left mTLE. And the changed mean connectivity strength in visual network of left mTLE and auditory network of right mTLE were positively correlated with the number of IEDs. Conclusions: This study revealed IEDs in mTLE have an extensive impact in the resting-state brain networks, especially for the networks damage involved in higher cognitive functions of the brain. This study was expected to contribute to further understanding of the mechanism of brain functional injury in mTLE.]]></description>
<pubDate>Fri,20 Nov 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Analysis of the characteristics of Virchow-Robin spaces in Alzheimer<sup><sup>,</sup></sup>s disease]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.11.002</link>
<description><![CDATA[Objective: To study the correlation between Magnetic Resonance Imaging of Virchow-Robin spaces (VRS) and Alzheimer’s disease (AD). Materials and Methods: Seventy AD patients (AD group) and sixty-two normal controls (control group) were detected by brain MRI, and their VRS in the midbrain, basal ganglia, deep insular white matter and centrum semiovale were numbered and measured. The results were compared between the two groups. Results: VRS were observed in multiple brain regions of AD groups, typically in basal ganglia. The discovery rate of VRS in AD group (49.1%, 34/70) was higher than that in control group (24.2%, 15/62), the difference is statistically significant (P<0.05).The number of VRS in AD group [(4.1±2.2)/case] was more than that in control group [(2.4±1.9) /case], the difference is statistically significant (P<0.05).The diameter of VRS in AD group [(2.8±1.2) mm] was larger than that in control group [(1.8±0.5) mm], the difference is statistically significant (P<0.05). Linear regression analysis showed the number, diameter of VRS in control group were both positive correlated with the age (r1=0.802, r2=0.902, all P<0.05). Conclusions: VRS in AD has its own characteristics, should cause the attention of clinical.]]></description>
<pubDate>Fri,20 Nov 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Applications of 1H-MRS and clinical relative factors in diagnosis of neonatal cerebral white matter diffuse excessive high signal intensity]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.11.003</link>
<description><![CDATA[Objective: Use proton magnetic resonance spectroscopy (1H-MRS) to observe the imaging features in neonatal cerebral white matter diffuse excessive high signal (DEHSI) and explore the evolution of DEHSI and diagnostic value.  Materials and Methods: This study included 95 neonates, using MRS for the study of the region of interest in cerebral white matter lesions.  Results: Postnatal age, gestational age, and head girth had significantly negative correlation with DEHSI (r=－0.398, r= －0.390, r=－0.269, all P<0.05). Gestational age and postnatal age with the ratios of NAA/Cr (r=0.386, r=0.328, all P<0.05), and NAA/Cho (r=0.432, r=0.367, all P<0.05) were discovered with a clearly positive significant difference and a marked negatively correlated with the values Cho/Cr (r=－0.204, r=－0.211, all P<0.05), and MI/Cr (r=－0.243, r=－0.286, all P<0.05). In addition, the increasing extent of DEHSI was associated with a significant decrease in NAA concentration, NAA/Cr in relation to NAA/Cho (r=－0.320, r=－0.394, r=－0.565, all P<0.05), resulting in an increase in Cho/Cr and MI/Cr (r=0.389, r=0.376, all P<0.05). Compared with control group, Cho/Cr and MI/Cr were significantly elevated, whereas NAA/Cr and NAA/Cho ratios were significantly decreased in infants with mild DEHSI and moderate-sereve DEHSI (all P<0.05).  Conclusions: Postnatal age, gestational age, and head girth had negative correlation with DEHSI. Gestational age and postnatal age were related to metabolite levels in neonatal brain. In addition, when it stayed in intrauterine for the long time, and it had the higher maturity, the lower grade of DEHSI, which was resulting in elevating NAA concentrations.]]></description>
<pubDate>Fri,20 Nov 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Double-phase three-dimensional double-phase contrast-enhanced magnetic resonance angiography of long-range aortic dissection: technique and clinical value of two-stop scan on 3.0 T]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.11.004</link>
<description><![CDATA[Objective: To evaluate the operating feature and diagnostic usefulness of two-stop double-phase 3D CEMRA of long-range aortic dissection (AD) on  3.0 T. Materials and Methods: The transit time (TT) test and 3D FLASH-turbo MRA-sequence 3D CEMRA of 2 consecutive phases were prospectively performed in 14 patients with long-range AD. The differences between true and false lumens were compared in the aspects of TT, signal intensity of peak enhancement (SPE), and intensities on 3D CEMRA. MIP and MPR images of double-phase 3D CEMRA were employed to observe the dynamic visualization of true and false lumens, and to assess intimal entrance tear and relationship between abdominal aortic branch and lumens of AD. The findings in double-phase 3D CEMRA were correlated with those found in DSA. Results: The TT of true and false lumens was (13.4±4.8) s, (17.5±4.7) s, respectively, differing significantly (P<0.01). The SPE of true and false lumens was 108.7±28.4, 83.5±39.3, respectively, which differed significantly (P<0.05). The intensity of true and false lumens on double-phase 3D CEMRA was 391.4±83.7, 142.9±77.2, respectively, and different significantly (P<0.01) in 1st phase; 225.0±66.1, 231.6±80.0, respectively, with no difference (P>0.50) in 2nd phase. Dynamic visualization of true and false lumens of AD was displayed on double-phase 3D CEMRA: the whole-length visualization was noted in true lumen while segmented visualization in false lumen in 1st phase, signal subsidence was revealed on true lumen and whole-length visualization on false lumen in 2nd phase. Twenty-three intimal entrance tears were detected in double-phase 3D CEMRA 14 of which located closely distal to orifice of left subclavian artery, 5 at supra-phrenic descending aorta, and 4 at abdominal aorta. Jet sign was demonstrated in 8 tears. The number and location of tears detected on double-phase 3D CEMRA coincided completely with those on aortic DSA. Five left renal arteries, 3 right renal arteries and 1 celiac trunk were noted originating from false lumen.  Conclusions: Two-stop double-phase 3D CEMRA could be used in diagnosing long-range AD on 3T, and the technical essentials of which comprise TT test and double-phase scan based on hemodynamic difference between both lumens of AD.]]></description>
<pubDate>Fri,20 Nov 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Preliminary study of introvoxel incoherent motion MR sequence in carcinoma of gastric cardia]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.11.005</link>
<description><![CDATA[Objective: To analyze introvoxel incoherent motion (IVIM) MR sequence features and the difference between carcinoma of gastric cardia and normal cardia. Materials and Methods: MR imaging data of 20 patients with gastric cardia carcinoma and 20 patients of normal cardia were analyzed retrospectively. All patients underwent routine MR scan and biexponential model IVIM sequence. The IVIM parameters (Standard ADC, D, D* and f) of gastric cardia carcinoma and normal cardia were measured and analyzed by using t test. Results: The Standard ADC, D, D* and f of gastric cardia carcinoma group were (1.18±0.35)×10-3 mm2/s, (0.63±0.67)×10-3 mm2/s, (21.29±18.83)×10-3 mm2/s, 0.37±0.37, and those of normal cardia group were (1.56±0.38)×10-3 mm2/s, (1.32±1.06)×10-3 mm2/s, (8.59±3.98)×10-3 mm2/s, 0.70±0.22. The differences of these parameters between two groups were statistically significant (t=2.920, 2.473, 2.325, 2.923, P=0.006, 0.027, 0.019, 0.006). No differences showed between standard ADC and D in both gastric cardia and normal groups (t=3.073, 0.868, P=0.543, 0.326).  Conclusions: The Standard ADC and D of gastric cardia carcinoma group showed lower than normal cardia group, the D* appeared higher than normal group, which may play a complementary role in the diagnosis of gastric cardia carcinoma.]]></description>
<pubDate>Fri,20 Nov 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[The study of multi-b value MR diffusion weighted imaging in differentiation of breast benign and malignant tumors]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.11.006</link>
<description><![CDATA[Objective: To explore the value of multi-b value MR Diffusion Weighted Imaging (DWI) and ADC (apparent diffusion coefficient) in differentiation of breast benign and malignant tumors. Materials and Methods: Thirty-six cases of breast tumors including 24 malignant and 12 benign tumors were collected, all of which were confirmed by biopsy or surgery pathology. All of 4 b values (0, 400, 800, 1000 s/mm2) were performed on DWI examination, and 3 groups of ADC value were generated. Results: The ADC value of malignant tumors was lower than that of benign tumors. There exists statistic significance of ADC value between benign and malignant breast tumors in different b value. The sensitivity and specificity of ADC was 84.7% and 79.8% when b=800 s/mm2 and set 1.33×10-3 mm2/s as the upper bound. And the sensitivity and specificity of ADC was 92.2% and 90.6% when b=1000 s/mm2 and set 1.15×10-3 mm2/s as the upper bound. Conclusions: DWI has great value in the differentiation of breast benign and malignant tumors, and it has most diagnostic accuracy when b was set 1000 s/mm2.]]></description>
<pubDate>Fri,20 Nov 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[1H magnetic resonance spectroscopy study on the short term changes of skeletal muscle after treatment in type 2 diabetes mellitus]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.11.007</link>
<description><![CDATA[Objective: To evaluate the changes of intramyocellular lipid (IMCL) and extramyocellular lipid (EMCL) at the soleus of right leg by 1H magnetic resonance spectroscopy (1H-MRS) after treatment within 4 weeks and correlate to insulin resistance index (HOMA-IR) in incipient non-thin type 2 diabetes. Materials and Methods: Thirty incipience non-thin type 2 diabetes were collected, and divided into insulin with metformin treatment group (n=20), no-drug treatment group (n=10). Healthy volunteers acted as control group (n=10). All groups were underwent 1H-MRS at the soleus of right leg. IMCL and EMCL were evaluated at 0 days,  14 days (2 weeks), and 28 days (4 weeks). HOMA-IR of treatment group was measured corresponding to duration of 1H-MRS scans. Statistical analysis was performed using SPSS 17.0 package. One-way ANOVA or Kruskal-Wallis test were used to analyze the difference of IMCL and EMCL at each group. Pearson correlations were evaluated between IMCL and HOMA-IR in the treatment group. Results: IMCL and HOMA-IR were obviously reduced in drug treatment group at 4 weeks (P=0.008, 0.015). IMCL in treatment group correlated to HOMA-IR positively. Conclusions: IMCL at soleus evaluated by 1H-MRS of non-thin type 2 diabetes was sensitive and quantified to the changes of insulin resistance level during short term treatment.]]></description>
<pubDate>Fri,20 Nov 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[The study of MRI patterns of osteochondral injury in adolescents after acute lateral patellar dislocation]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.11.008</link>
<description><![CDATA[Objective: To analyze MRI characteristics of osteochondral injury patterns in adolescents after acute lateral patellar dislocation.  Materials and Methods: MR images of 41 adolescents after acute lateral patellar dislocation were retrospectively reviewed. Routine MR scanning was performed in axial, sagittal and coronal planes, including T1WI, T2WI and fat saturation sequence.  Results: The prevalence rate of osteochondral injury was 90.2% (37/41) in adolescent group after acute lateral patellar dislocation. The prevalence rate of Ⅰ, Ⅱ, Ⅲ, Ⅳ degree were 10.5%, 12.2%, 24.5%, 52.6% in adolescent group. The prevalence rate of osteochondral injury at patellar attachment, femoral attachment and both patellar-femoral attachment were 32.4%, 13.5%, 54.0% in adolescent group.  Conclusion: Ⅲ, Ⅳ injury and at patellar attachment, both patellar-femoral attachment were most easily occurred in adolescents.]]></description>
<pubDate>Fri,20 Nov 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Measurement of MR T2 relaxation time for assessing cervical intervertebral disc degeneration: preliminary study]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.11.009</link>
<description><![CDATA[Objective: To explore the value of T2 relaxation time (T2 value) measurement in detecting cervical intervertebral disc degeneration, and assessing age and disc level related intervertebral disc changes. Materials and Methods: Forty asymptomatic adult volunteers were examined at 1.5 T MR by T2-weighted sagittal imaging and T2-mapping. For all participants, Pfirrmann grading system and T2 value were used to evaluate the degenerative degree of the disks. Results: Significant negative correlation were observed between Pfirrmann grades and T2 values of cervical intervertebral disc (r=－0.64, P<0.01). ANOVA (analysis of variance) among different Pfirrmann grades showed significant differences in T2 values (F=48.2，P<0.01), and significant differences were seen between any 2 grades (P<0.05). The area under ROC curve of T2 value were 0.79, 0.81 and 0.78 (P<0.05) separately when grade Ⅰ vs. Ⅱ, Ⅱ vs. Ⅲ, and Ⅲ vs. Ⅳ. T2 values of 18—30 age group were higher than 31—40 age group participants (P<0.05). Significant differences among different disc level were observed in 18—30 age group (P<0.05). However, in 31—40 age group, no significant differences of disc level were demonstrated (P>0.05).  Conclusions: T2 relaxation time measurement is a quantitative-parameter for assessing cervical intervertebral disc degeneration and age and disc level related disc changes, and shall be used as a complementary sequence in detecting cervical disc degeneration for its certain clinical value.]]></description>
<pubDate>Fri,20 Nov 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[The reproducibility of IVIM-DWI in normal prostate and age-related analysis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.11.010</link>
<description><![CDATA[Objective: To investigate the reproducibility of the intravoxel incoherent motion diffusion weighted imaging (IVIM-DWI) derived parameters, and analyze the change of the IVIM-DWI derived parameters of normal prostate in different age groups. Materials and Methods: Sixty-six volunteers conformed to the standards were divided into three groups (group A, 15—30 years, 13. Group B, 31—50 years, 25. Group C, ≥51 years, 28) and underwent the scanning of IVIM-DWI with 15 b-factors from 0 to 3000 (0, 25, 50, 75, 100, 150, 200, 400, 600, 800, 1000, 1200, 1500, 2000, 3000 s/ mm²) twice with an interval of 30 minutes using 3.0 T MRI device, the biexponential fits were applied to figure out the slow ADC, fast ADC and f values. The reproducibility of every parameters were investigated by the paired t-test. The differences of every parameters in normal prostate between the three age groups were assessed using one-way analysis of variance (ANOVA) and the least significant difference (LSD) t-test.  Results: Slow ADC, fast ADC and f values showed good reproducibility in both peripheral zone (PZ) and central gland (CG) of three age groups, except fast ADC in CG of group A (P=0.022). The slow ADC and f values of the prostate peripheral zone and central gland had the upward tendency with age increasing. Slow ADC showed significant difference between group A and B, group A and C, while had no significant difference between group B and C in PZ, and slow ADC showed significant difference between group A and C, group B and C, while had no significant difference between group A and B in CG. Fast ADC in both PZ and CG between three age groups had no significant different. F value show significant difference between three age groups in PZ, while in CG f value show significant difference between group A and C, group B and C, while had no significant difference between group A and B.  Conclusions: In general, a good reproducibility of IVIM-DWI derived parameters in normal prostate of three age groups was observed. IVIM-DWI technology reflected the age-related change of prostate tissues in the celluar level, and the derived parameters could set a reliable reference to the quantitative analysis of prostate diseases.]]></description>
<pubDate>Fri,20 Nov 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Normal appearance of whole-body PET-like imaging at 1.5 T MRI]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.11.011</link>
<description><![CDATA[Objective: To investigate the normal appearance of whole-body PET-like imaging at 1.5 T MR scanner.  Materials and Methods: Forty healthy volunteers with different age underwent whole-body PET-like MR examination at 1.5 T scanner. The data was reformatted using Functool and 3D-MIP software at AW4.6 workstation. Then, maximum intensity projection (MIP), inverted-gray-scale and pseudocolor processing PET-like images were obtained. Signal of the normal tissue was observed. Correlation between age and signal of lumbar vertebrae and intervertebral discs was analyzed. Results: (1) Fat, muscle, lungs, liver, gastrointestinal tract, and cerebrospinal fluid showed hypointensity. (2) Brain, spinal cord, glands of head and neck, spleen, gallbladder, genital gland, and intervertebral discs showed hyperintensity. (3) Vertebral body showed hyperintensity in children and mainly hypointensity in healthy volunteers over 60 years of age. (4) There were significant negative correlation between age and signal of lumbar vertebrae (r=－0.6917，P<0.05) and intervertebral discs  (r=－0.7562，P<0.05).  Conclusions: It will be beneficial for diagnosis after correctly understanding normal appearance of PET-like images.]]></description>
<pubDate>Fri,20 Nov 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[A research about the development of response inhibition in children and adolescents using fMRI base on Go/NoGo task]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.11.012</link>
<description><![CDATA[Objective: To investigate the development of motor response inhibition and error processing abilities in children and adolescents using functional magnetic resonance imaging (fMRI) in combination with a Go/NoGo task.  Materials and Methods:  Forty-two children and adolescents, ranging in age from 8 to 17, took part in this experiment, while behavioral and fMRI data were collected. The data were analyzed using SPM8 and SPSS, and then correlation analysis was done between age and the inferior frontal gyrus, a key area for motor response inhibition.  Results: The results showed that reaction time was decreased with age, while accuracy was increased with age during the Go/NoGo task. We investigated that the activation of the inferior frontal gyrus was increased significantly with age in 8—15 year-old subjects during response inhibition. Furthermore, we observed that the activation of the inferior frontal gyrus reached a peak platform in the late adolescence. And the activation of right inferior frontal gyrus was increased significantly with age during error processing. Conclusions: These data suggest that the inferior frontal gyrus plays an important role in motor response inhibition. The inferior frontal gyrus may develop with age in early adolescence, and then reach a peak platform in late adolescence, when it is mature and close to adult level.]]></description>
<pubDate>Fri,20 Nov 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[MR imaging in diagnosis of anal canal and perianal diseases]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.11.014</link>
<description><![CDATA[The anal canal is an important part of the gastrointestinal and has complex anatomic structure. Diseases occurring in the anal canal and perianal have increased in recent years, including anal fistula, perianal abscess, hemorrhoids, anal fissure, anal carcinoma, sacrococcygeal pilonidal sinus and so on, they can have serious effect in patients' quality of life. MRI has perfect soft-tissue resolution and comprehensive and multi-planar imaging. This article mainly talks about the performance of these diseases in MRI and the MRI technique in order to improve the level of diagnosis in anal canal and perianal diseases.]]></description>
<pubDate>Fri,20 Nov 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Progress of brain functional magnetic resonance imaging in pain]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.11.015</link>
<description><![CDATA[Functional magnetic resonance imaging (fMRI) is a non-invasive functional imaging technique, and was more and more frequently applied in the study of pain, which makes us know better about the physiological reaction of ache. In this article the research progress of fMRI in the brain of pain in recent years will be summarized from several aspects: location, fMRI study and treatment of pain based on the analysis of different types of pain.]]></description>
<pubDate>Fri,20 Nov 2015 00:00:00  GMT</pubDate>
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