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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=201602</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
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<title><![CDATA[Measurement of diffusion tensor imaging in patients with mild cognitive impairment: a meta analysis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.02.001</link>
<description><![CDATA[Objective: To investigate the value of MR diffusion tensor imaging in diagnosis of mild cognitive impairment (MCI) with Meta-analysis. Materials and Methods: A search in computer databases such as PubMed, CNKI WanFang and VIP Data was performed, the relevant literature which are related to the MR diffusion tensor imaging in diagnosis of MCI were collected from the date of the above mentioned databases’ establishment to January 31, 2015. The measured data of MCI and normal control (NC) was extracted from different brains (frontal lobe, parietal lobe, temporal lobe, occipital lobe, posterior cingulated fasciculus, hippocampus, parahippocampal gyrus, posterior limb of the internal capsule, fasciculus longitudinal superior, fasciculus longitudinal inferior, fornix, genu of corpus callosum, splenium of corpus callosum, uncinatus fasciculus), the relevant articles were analyzed with the Review Manager 5.3 to achieve weighted mean difference (WMD) with 95%confidence level CI. Results: Totally 47 articles including 30 English articles and 17 Chinese articles were collected. The outcome indicates the values of FA in the MCI group are lower than that in the NC group, and the WMD with 95% CI is –0.05[–0.05, 0.04], the values of FA of both the above metioned brains have significantly statistical difference except occipital lobe. Conclusion: The microstructural white matter in MCI group have been impaired, DTI can provide early diagnosis index of MCI.]]></description>
<pubDate>Sat,20 Feb 2016 00:00:00  GMT</pubDate>
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<title><![CDATA[Value of DWI to transplanted renals with early acute rejection: a preliminary study]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.02.002</link>
<description><![CDATA[Objective: To explore the value of DWI on transplanted renals with early acute rejection. Materials and Methods: Study protocol was approved by local ethics committee; informed consent was obtained. A total of 88 velunteers were enrolled and divided into three groups, as follows: Group A, 51 cases with healthy kidneys in situ; group B, 22 transplantation with stable renal function for at least 3 months after operating; and group C, 15 iliac allograft renals with early acute rejection from 1 week to 4 weeks after operating. T2W, T1W axial/coronal, and a transverse fat-saturated echo-planar DWI with 3 b-values(0, 100, 800 s/mm2) were performed on a 3.0 T scanner during normal breathing. EWS2.6.3 workstation was used to calculate the apparent diffusion coefficient(ADC) value of renal cortex, medulla, muscle respectively based on ADC0-800 maps. Receiver operating characteristic(ROC) curve was used to predict the kidneys with early acute rejection. Results: No statistic significances were found for gender, age, ADC0-800 of muscle among three groups(P＞0.05), nor did ADC0-800 values reveal a significant difference for left and right kidneys in situ(P＞0.05). It showed renal cortex mean(+/-SD) ADC0-800 values of (1.92±0.13), (1.93±0.15), (1.68±0.14)×10–3 mm2/s for group A, B and C, respectively. Group C was significantly higher than both group A and B(P<0.05); however no statistic significance was found between group A and B(P＞0.05); Nor did medullary ADC0-800 values reveal a significant difference for 3 groups. While the difference between cortex and medulla was statistically significant for both groups A and B(P＜0.05). With an ADC0-800 ＜1.76×10–3 mm2/s as diagnose critical points compared to biopsy, the sensibility was 86.7%, the specificity was 90.4%, and the accuracy was 0.942 in the prediction of the kidneys with early acute rejection. Conclusion: DWI is of important value in transplanted renals with early-stage acute rejection, it can provide reliable imaging evidence for treatment.]]></description>
<pubDate>Sat,20 Feb 2016 00:00:00  GMT</pubDate>
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<title><![CDATA[Rectal cancer lymph node can be identified by diffusion-weighted MRI with multiple b values]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.02.003</link>
<description><![CDATA[Objective: To prospectively assess the diagnostic performance of diffusion-weighted (DWI) magnetic resonance imaging(MRI) in the detection of rectal cancer metastasis lymph nodes by using multiple b values and T2 weighted Imaging. Materials and Methods: Review of 80 cases of endoscopic and postoperative pathology confirmed DWI images of rectal cancer patients of China-Japan Friendship Hospital Affiliated Jilin University; DWI multi b scan, b values was 0, 20, 30, 50, 600, 800, 1000 s/mm2; Through analysis of workstation software, based on b value generated table apparent diffusion coefficient apparent diffusion coefficient (ADC) diagram. According to pathological results, will be divided into group A/B(metastasis lymph nodes and the metastasis lymph node), retrospective measurement and analysis of  different b values metastasis lymph node detection rate; Measuring the size of different lymph nodes, multiple b value of ADC figure that lymph node detection rate; Analysis of more than two sets of lymph node b value of ADC value, the measurement of lymph node metastasis of sensitivity, specificity, ROC curve drawing. Results:(1)With the increase of b value (0—1000 s/mm2), lymph node detection rate decline; Ratio that image lymph nodes signal-to-noise of DWI can increasing. (2)More than 8 mm diameter lymph nodes, b value of DWI image detection rate is consistent, be more no significant statistical difference. (3)The high field strength more b value, the difference of group A/B lymph node with ADC values was statistically significant.(4)The best cut-off point for diagnosis the nature of lymph node, ADC values is 0.98×10–3mm2/s has a moderate sensitivity, high specificity. Conclusion: Identification the nature of lymph node, high field strength b value of DWI imaging can be more effective with high specificity and medium sensitivity.]]></description>
<pubDate>Sat,20 Feb 2016 00:00:00  GMT</pubDate>
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<title><![CDATA[Preliminary using multivoxel 1H-MRS to reveals the effect of CPAP treatment in moderate and severe OSAHS patients]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.02.004</link>
<description><![CDATA[Objective: To investigate the variation of multivoxel 1H magnetic resonance spectroscopy(1H-MRS) after continuous positive airway pressure(CPAP) treatment in patients who are suffering from obstructive sleep apnea hypopnea syndrome(OSAHS). Materials and Methods: Twenty-five cases of moderate or severe OSAHS patients were performed brain multivoxel 1H-MRS examinations before and after CPAP treatment. The ratios of brain metabolites in frontal lobe was recorded and analyzed respectively. To observe whether the lactate(Lac) peak appeared or not. Results: In region of frontal lobe, the NAA/Cr, NAA/Cho of the patients after treatment 1day (2.3140±0.3128 and 2.0164±0.4240, respectively) and 90 days (2.2812±0.2904 and 2.0180±0.4796) were increased compared with the patients before treatment (2.0212±0.2312 and 1.6088±0.2571), and the differences were statistically significant(P<0.05). Lac peak was not detected in all. Conclusion: Multivoxel 1H-MRS could demonstrate sensitively the changes of brain metabolism in patients with OSAHS before and after CPAP treatment, and may help clinical therapeutic effect and prognostic evaluation provide objective imaging evidence.]]></description>
<pubDate>Sat,20 Feb 2016 00:00:00  GMT</pubDate>
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<title><![CDATA[Changes of default mode network in patients with chronic mountain sickness: evidence from PCC functional connectivity]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.02.005</link>
<description><![CDATA[Objective: To explore the changes of default mode network (DMN) in CMS patients, to investigate the pathogenesis of brain lesions in patients with CMS. Materials and Methods: Twenty-four patients with clinically diagnosed CMS and age, sex, years of education, altitude matched 25 cases of normal volunteers underwent whole brain scan, and EPI images were acquired. The difference in DMN between the two groups was analyzed by defining posterior cingulate cortex (PCC) as seed region. Results: Compared with normal control group, posterior cingulate showed increased function connectivity with left parahippocampal gyrus, left angular gyrus, left medial frontal gyrus, right cerebellum 9 area and left cerebellum crus 2 area of CMS patients. Conclusion: CMS patients had changed functional connection in many regions, it might be associated with the pathogenesis of CMS patients .]]></description>
<pubDate>Sat,20 Feb 2016 00:00:00  GMT</pubDate>
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<title><![CDATA[Follow-up value of Multi-modality imaging in the MRI assessment of recurrence after transcatheter arterial chemo embolization combined radiofrequency ablation of nodular hepatocellular carcinoma]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.02.006</link>
<description><![CDATA[Objective: To study the follow-up value of Multi-modality imaging in the MRI assessment of recurrence after transcatheter arterial chemoembolization (TACE) combined radiofrequency ablation (RFA) of nodular hepatocellular carcinoma (HCC). Materials and Methods: The clinical and pathological characteristics of single nodular hepatocellular carcinoma confirmed by clinical or pathological between September 2009 and September 2014 were retrospectively collected, and the patients were treated by RFA and TACE. At last, 105 cases were screened, including 87 males and 18 females, aged 46—83 years, and median age of 63 years. The recurrence points were divided into three groups: recurrence group, suspicious group and postoperative group. Combined with the recurrence group, the changes of the serial signals and morphological signs of the other two groups were observed in the tumor recurrence region of the tumor recurrence region. Statistical analysis: using chi square test to compare the signal and morphological changes between the three groups. According to the sequence signal of the recurrence group, the percentage of the morphology of the group was number. Using the ROC curve to compare the diagnostic thresholds of the serial signals between the recurrent group and the postoperative group. Using logistics regression to calculate the sensitivity and specificity of each sequence using signal and morphological characteristics for the diagnosis of suspicious group. Then the sequence was joint, find the maximum Youden index sequence matching. Results: Signal characteristics of suspicious group: T1WI showed low signal and mixed signal; T2WI showed high signal and mixed signal; DWI showed hyperintensity LAVA (enhancement). Morphological characteristics: the sequence mostly with half. The diagnostic efficacy: when four joint use T1WI, T2WI, DWI, LAVA and combined diagnostic sensitivity and specificity were 85.7% and 94.3%. Conclusion: Multi-modality imaging of MRI has the potential to assess the recurrence after TACE combined RFA of nodular HCCs .]]></description>
<pubDate>Sat,20 Feb 2016 00:00:00  GMT</pubDate>
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<title><![CDATA[Peripancreatic vascular involvement in acute pancreatitis: a MRI study]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.02.007</link>
<description><![CDATA[Objective: To study MRI findings of peripancreatic vascular involvement in acute pancreatitis(AP) as well as correlations between vascular involvement and the severity of acute pancreatitis according to the magnetic resonance severity index(MRSI). Materials and Methods: A total of 326 patients with AP admitted to our institution from August 2009 to August 2013 were included in this study. All cases signed informed consent. MRI plain scan and enhanced scan were performed within 72 hours after admission. MRI findings of acute pancreatitis were noted. The peripancreatic vascular involvement was noted in AP on MRI. Spearman correlation of peripancreatic vascular involvement with the MRSI scores were analyzed. Results: At mild, moderate and severe AP according to MRSI, the prevalence of peripancreatic vascular involvement were 3%(4/124), 17%(31/180), 91%(20/22) respectively in 326 patients. The prevalence among splenic vein thrombosis(7 patients), superior mesenteric vein thrombosis(5 patients), splenic vein invasion(49 patients), splenic artery invasion(47 patients) at mild, moderate and severe AP according to MRSI had statistics differences and was positively correlated with the MRSI score (P＜0.05, 0.3＜r＜0.5). The prevalence among celiac trunk invasion (21 patients), portal vein invasion (41 patients), common hepatic artery invasion (39 patients), superior mesenteric artery invasion (36 patients), superior mesenteric vein invasion (24 patients) at mild, moderate and severe AP according to MRSI had statistics differences and was not positively correlated with the MRSI score (P＜0.05, r＜0.3). The prevalence among portal vein thrombosis (4 patients), splenic artery pseudoaneurysm (3 patients) at mild, moderate and severe AP according to MRSI had not statistics differences and was not positively correlated with the MRSI score (P＞0.05, r＜0.3). Conclusions: Some patients with AP show peripancreatic vascular involvement on MRI. The prevalence of splenic vein thrombosis, superior mesenteric vein thrombosis, splenic vein invasion and splenic artery invasion has a positive correlation with the severity of AP on MRI.]]></description>
<pubDate>Sat,20 Feb 2016 00:00:00  GMT</pubDate>
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<title><![CDATA[Value of STIR sequence in diagnosis of lumbosacral superficial fasciitis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.02.008</link>
<description><![CDATA[Objective: To assess the diagnostic value of MRI STIR sequence in lumbosacral superficial fasciitis. Materials and Methods: Analysis of 100 cases of MRI pictures of patients with low back pain or leg pain was taken. Including 43 males and 57 females, with a mean age of 56(21–87 years). The MRI pictures included T1WI, T2WI and STIR sequence scanning. Results: Strip high signals with long T1, long T2 abnormal signal behind lumbar vertebra were showed in 31 cases. The STIR sequence was more obvious, more intuitive to display lumbosacral superficial fasciitis, while the abnormal fascia signals in T1WI and T2WI sequences were often covered. Conclusion: The fascia superficialis edema is at a high rate in the patients with lumbosacral pain. The MRI STIR sequence can display the lumbosacral subcutaneous fibrositis sensitively and clearly, according to clinical manifestations, imaging findings, treatment and follow-up confirmed.]]></description>
<pubDate>Sat,20 Feb 2016 00:00:00  GMT</pubDate>
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<title><![CDATA[Initial application and clinical significance of DTI in normal adult patella cartilage]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.02.009</link>
<description><![CDATA[Objective: To study the initial application of diffusion tensor imaging (DTI) in normal adult patella cartilage and discuss its clinical significance. Materials and Methods: One hundred and fourteen healthy normal adult volunteers were underwent MRI with 3.0 T MR system (Achieva 3.0 T, Philips), the right patella cartilage was scanned by 3D-DESS and DTI. Different images were obtained, while the ADC and FA values of patella cartilage were measured. Results: The values of ADC were gradually decreased with age, but the ADC values were increased obviously (P＜0.05). Statistically significant negative correlations were observed between FA value and age (r=-0.8321, P=0.027＜0.05), and positive correlations were observed between ADC value and age (r=0.698, P=0.015＜0.05). Conclusion: DTI can reflect the imperceptible changes in patella cartilage composition and the collagen fiber structure. DTI can be used for detecting early diagnosis, monitoring progression and evaluating prognosis in patella cartilage disease for its good repeatability and accuracy.]]></description>
<pubDate>Sat,20 Feb 2016 00:00:00  GMT</pubDate>
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<title><![CDATA[Clinical features and MRI findings of wernicke encephalopathy]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.02.010</link>
<description><![CDATA[Objective: To investigate the clinical and MR imaging features of wernicke encephalopathy(WE). Materials and Methods: Retrospective analysis in February 2010 to June 2015, the clinical diagnosis of 10 cases of wernicke encephalopathy in patients with clinical and MRI image data. Results: Three of ten patients showed changes in consciousness and psychiatric syptoms, Three patients had ocular manifestations, and four had ataxia. On MR imaging, six patients had evidence of symmetric lesions in the medial thalami and in the periventricular region of the third or four ventricle, and in periaqueductal area. Two patients had evidence of mamillary bodies, column of the fornix; Two patient had evidence of tectal plate, mamillary bodies, periaqueductal area, bilateral signal-intensity alterations of the pre- and postcentral cortex. The imaging findings were hyperintensity on T2-weighted or T1-weighter and fluid-attenuated inversion recovery (FLAIR) images. Conclusion: Contrast enhancement in the mamillary bodies and thalamus is a typical finding of the disease in WE patients. MR imaging has a valuable diagnostic role in diagnosing early WE except for clinical symptoms.]]></description>
<pubDate>Sat,20 Feb 2016 00:00:00  GMT</pubDate>
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<title><![CDATA[Current status and progress in magnetic resonance vessel wall imaging]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.02.012</link>
<description><![CDATA[MR vessel wall imaging (MRVWI) acquires the information of vessel wall by suppressing the signal of flowing blood in lumen area. MRVWI techniques can visualize vessel wall directly and evaluate plaque vulnerability by measuring morphology and components of plaque. The main target of MRVWI techniques is to suppress the signal of the flowing blood. In this survey, we will briefly review the current status and progress in MRVWI techniques.]]></description>
<pubDate>Sat,20 Feb 2016 00:00:00  GMT</pubDate>
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<title><![CDATA[Research progress on lossless compression technology for medical images]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.02.013</link>
<description><![CDATA[Medical imaging technique has been the central supported technique for modern clinical medicine diagnosis and treatment. However, for the images obtained by various medical imaging devices, so huge dataset creates heavy burden for image storage and transmission and restricts the following application of medical images. Therefore, it is necessary to exploit efficient compression technique to compress various medical images. Lossless compression can completely keep the total information of original medical images, which has been widely accepted in the practical application. In this paper, the research progress on lossless compression for medical images is summarized and analyzed; finally, its development trend is expected.]]></description>
<pubDate>Sat,20 Feb 2016 00:00:00  GMT</pubDate>
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<title><![CDATA[The application of UTE-MRI in cortical bone imaging]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2016.02.014</link>
<description><![CDATA[The prevalence of osteoporosis(OP) is developing with the aging of the society. As the most serious complication of OP, fragility fractures bring the patients heavy economic and disease burdens. Instead of focusing on the change of trabecular bone, recently, more researchers realize the important role of cortical bone in fragility fractures. UTE-MRI is a newly emerging MRI sequence which makes the qualitative and quantitative imaging of cortical bone possible in vivo. Some studies have proved the feasibility of the application of UTE-MRI in fracture imaging, cortical water quantification, cortical porosity measurement, bone perfusion imaging, etc, both in vitro and in vivo. The aim of this review is to briefly introduce this new MRI sequence and make a summary of its applications in cortical bone imaging.]]></description>
<pubDate>Sat,20 Feb 2016 00:00:00  GMT</pubDate>
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