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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=201403</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
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<title><![CDATA[A preliminary study of 3-dimensional pseudocontinous arterial spin labeling in WHO grade II gliomas subtyping]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2014.03.001</link>
<description><![CDATA[Objective: Different subtypes of gliomas present different prognosis and different response to therapy. To retrospectively analyses the differentiating diagnostic accuracy of 3-dimensional pseudocontinous arterial spin labeling (3D-PCASL) in the prediction of WHO grade II gliomas subtyping, and to appraise normalized lesion/normal tissue cerebral blood flow (nCBF) with histological findings as a reference standard. Materials and Methods: 34 patients with pathologically proved WHO grade II gliomas underwent conventional magnetic resonance sequences, 3-dimensional pseudocontinuous arterial spin labeling (3D-PCASL) and post-contrast MR imaging. Representative maximal nCBF originated from 3D-PCASL regions of interest were chosen and measured from each lesion. These parameters were used for statistical evaluation according to histopathological result to group astrocytomas (n=16), oligodendrogliomas (n=13) and oligoastrocytomas (n=5). Results: The mean nCBF ratio (1.213±0.506) of astrocytomas was slightly lower than that (1.283±1.414) of oligodendragliomas group. There was no significant difference between both groups for mean nCBF ratio (P=0.854). Without enough sample of oligoastrocytoma group, it was excluded for statistic analysis. Conclusions: There was no obvious difference in perfusion between the different subtypes of WHO grade II gliomas. It should be too early to say that 3D-PCASL is a valuable method for differentiating diagnosis different subtypes of WHO grade II gliomas which will be elucidated in further study.]]></description>
<pubDate>Thu,20 Mar 2014 00:00:00  GMT</pubDate>
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<title><![CDATA[Study on relationship between clinical grading and detection rate of hemorrhage by susceptibility weighted imaging for newborns with hypoxic-ischemic encephalopathy]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2014.03.002</link>
<description><![CDATA[Objective: To study the relationship between clinical grading and detection rate of hemorrhage by susceptibility weighted imaging (SWI) for newborns with hypoxic-ischemic encephalopathy (HIE). Materials and Methods: 30 cases of newborns with HIE diagnosed by clinical criteria were selected to receive SWI sequence scan. These newborns were divided into 3 groups according to clinical grading (mild, moderate, severe) and numbers of newborns  in which intracranial hemorrhage detected by SWI were counted. χ2 test and partitions of χ2 method were performed to compare the detection rate of hemorrhage by SWI according to clinical grading. Results: There had statistical difference for the detection rate of hemorrhage by SWI among three groups (χ2=12.438, P=0.02). The detection rate of hemorrhage by SWI for mild newborns with HIE was significant lower than that of moderate newborns with HIE (χ2=5.690, P=0.017) and that of severe newborns with HIE (χ2 =9.545, P=0.002). There had no statistical difference for the detection rate of hemorrhage by SWI between moderate and severe newborns with HIE (χ2=1.173, P=0.279). Conclusions: SWI has higher sensitivity than conventional MRI sequence in detecting intracranial hemorrhage. The detection rate of hemorrhage by SWI for mild newborns with HIE is lower than that of moderate and severe newborns. We can infer the severity in newborns with HIE according to whether hemorrhage was detected by SWI.]]></description>
<pubDate>Thu,20 Mar 2014 00:00:00  GMT</pubDate>
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<title><![CDATA[CT, MRI diagnosis of cystic lesions in sella region]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2014.03.003</link>
<description><![CDATA[Objective: Analysis of sellar cystic lesions of the CT, MRI, to evaluate the value of CT and MRI in the diagnosis of. sellar cystic lesions. Materials and Methods: A retrospective analysis of 46 cases of cystic lesions in sella region image and clinical operation and pathological data. Results: Cystic pituitary tumor 22 cases, 17 cases of craniopharyngioma, 3 cases of Rathke cyst, 1 cases of dermoid cyst, 3 cases of epidermoid cyst. Conclusions: CT can accurately show the damage degree of sellar region tumor calcification and osteoporosis, MRI can show the lesions size, shape and adjacent anatomic relationship between the lesions of sellar region, is the preferred method of examination.]]></description>
<pubDate>Thu,20 Mar 2014 00:00:00  GMT</pubDate>
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<title><![CDATA[The clinical and MR imaging characteristics of spontaneous intracranial hypotension]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2014.03.004</link>
<description><![CDATA[Objective: To investigate the clinical presentation and MRI characteristics of spontaneous intracranial hypotension (SIH) syndrome. Materials and Methods: Retrospective analysis of clinical presentation and MR imaging of 22 SIH patients, to summarize the characteristics of clinical presentation and MRI of (SIH). Results: Typical postural headache and the low CSF pressure (less than 60 mm H2O) ware found in the all patients. In the 22 patients, 10 cervical rigidity and 8 Hearing Disorders ware found. On MRI, all patients showed pachymeningeal diffuse enhancement, other findings included sagging brain (20), diminution of cerebral ventricles (10), enlargement of venous sinus (7). Conclusions: Postural headache and the low CSF pressure are the important clinical characteristics of SIH, diffuse enhancement of cerebral dura mater and sagging brain are the important MRI characteristics of SIH, enhanced MR was the important method in diagnosis of SIH.]]></description>
<pubDate>Thu,20 Mar 2014 00:00:00  GMT</pubDate>
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<title><![CDATA[The evaluation of MRI in the diagnosis of choroidal melanoma]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2014.03.005</link>
<description><![CDATA[Objective: To analyze the value of MRI in diagnosis of choroidal melanoma. Materials and Methods: 23 cases of suspected diagnosis of choroidal melanoma were selected. Before operations, MRI examination including plain scan and enhanced scan were performed on all patients. The sensitivity and specificity of MRI were analyzed. Results: Sixteen of the lesions suspected of being choroidal melanomas were found to be hyperintense relative to vitreous on T1WI and hypointense on T2WI. The sensitivity and specificity of MRI was 83.3% and 65.2% respectively. Conclusions: This small retrospective study demonstrates that MRI detects the characteristic signals of choroidal melanoma. MRI is a valuable imaging technique in diagnosis of choroidal melanoma.]]></description>
<pubDate>Thu,20 Mar 2014 00:00:00  GMT</pubDate>
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<title><![CDATA[Diffusion-weighted imaging at 3.0 T MR in diagnosis of lacrimal epithelial tumor]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2014.03.006</link>
<description><![CDATA[Objective: To investigate the diagnostic value of diffusion-weighted imaging (DWI) at 3.0 T MR and apparent diffusion coefficient (ADC) in distinguishing benign and malignant lacrimal epithelial tumors. Materials and Methods: 42 patients with lacrimal epithelial tumor who underwent conventional MRI and diffusion weighted imaging at 3.0 T magnetic resonance system  were retrospectively reviewed. All diagnoses were confirmed by surgery and pathologic examination including 17 cases of benign and 25 cases of malignant. The ADC values of 0 and 1000 s/mm2 were measured and analyzed statistically at the region with most significantly restricted diffusion. The ADC value of benign and malignant tumor was compared by Mann-Whitney U test, ROC curve of ADC value for diagnosing benign and malignant tumor was calculated. Results: The average ADC value of whole tumors was (0.965±0.191)×10-3 mm2/s, the average ADC values of benign and malignant tumor were (1.142±0.096)×10-3 mm2/sand (0.845±0.140)×10-3 mm2/s. There was statistical significant differences between the ADC values of benign and malignant tumors (Z=-4.754, P=0.000<0.01). The ADC value of malignant tumors at the region with most significantly restricted diffusion was lower than the ADC value of benign tumors. The acreage under the ROC curve was 0.936±0.043, S>0.9. The accuracy of ROC curve was high. According to ROC curve, using the ADC value of lower than 0.968× 10-3 mm2/s as a threshold for diagnosing malignant lacrimal epithelial tumor, the sensitivity of diagnosis of malignant tumor was 92%, the specificity was 94%, the accuracy was 93% respectively.  Conclusions: DWI at 3.0 T MR reveals the different diffusion characteristics of the lacrimal gland epithelial tumors. DWI could provide objective basis through the quantitative analysis of ADC values and be helpful in distinguishing benign and malignant lacrimal epithelial tumors.]]></description>
<pubDate>Thu,20 Mar 2014 00:00:00  GMT</pubDate>
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<title><![CDATA[Research of 3.0 T MRI virtual endoscopy reconstruction in hemifacial spasm]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2014.03.007</link>
<description><![CDATA[Objective: To explore the value of 3.0 T MRI virtual endoscopy recon-struction in mimetic convulsion. Materials and Methods: Thirty patients with mimetic convulsion received MR scan using FIESTA C sequence. The images were postprocessed with virtual endoscopy reconstruction on workstation. Relationship between vessels and nerves was analyzed in symptomatic side. Twenty two of 30 patients received microvascular decompression. Results: In symptomatic side of 30 patients, contact of vessels and nerves was found in 6 patients, and depression was found in 24 patients. Twenty four contact or depressions occurred in facial root emerging zone and six in nervi facialis distal to brainstem. Offending vessels included 11 anterior inferior cerebellar artery, 10 posterior inferior cerebellar artery, 6 arteriae vertebralis, and 3 arteriae basilaris. MRI showed the same offending vessels operative results, and the symptoms of mimetic convulsion disappeared after operation. Conclusions: 3.0 T MRI virtual endoscopy reconstruction has high clinical application value in hemifacial spasm, and plays an important role in etiological diagnosis and operation planning.]]></description>
<pubDate>Thu,20 Mar 2014 00:00:00  GMT</pubDate>
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<title><![CDATA[The diagonstic value of the 3.0 T DW- MRI in the different degrees differentiation of gastric cancer]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2014.03.008</link>
<description><![CDATA[Objective:To evaluate the diagonstic value of the 3.0 T diffusion-weighted magnetic resonance imaging (DW-MRI) in the different degrees differentiation of gastric adenocarcinoma. Materials and Methods: Collecting 33 cases clinical and MRI information of the different degrees differentiation of gastric cancer which confirmed by the pathology after surgery, retrospective analysis their conventional MRI and DWI images preoperative, measure apparent diffusion coefficient (ADC) values of the gastric cancer and the adjacent normal gastric wall. Results: Gastric cancer showed a high signal on DWI, there was a significant statistical differences in the gastric cancer and the normal gastric wall (P<0.01, t-test), the gastric cancer ADC value(1.113±0.183)× 10-3 mm2/s was lower than the normal gastric (3.026±0.191)×10-3 mm2/s. And also there was a significant statistical differences in the three groups (P<0.01, LSD-t). Poorly differentiated gastric adenocarcinoma ADC value [(0.968±0.0626)× 10-3 mm2/s] is lower than the moderately differentiated ADC value [(1.041±0.0570)× 10-3 mm2/s] and the highly differentiated ADC value [(1.372±0.0506)×10-3 mm2/s]. Conclusions: MRI-DWI and ADC values can distinguish the normal gastric and the different degrees differentiation of the gastric adenocarcinoma, and evaluate their biological behavior, there is a important meaning in the determing the degree of malignancy of gastric cancer.]]></description>
<pubDate>Thu,20 Mar 2014 00:00:00  GMT</pubDate>
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<title><![CDATA[The value of magnetic resonance diffusion weighted imaging in the diagnosis of prostate cancer]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2014.03.009</link>
<description><![CDATA[Objective: To evaluate diffusion weighted imaging (DWI) in the differential diagnosis of prostate benign and malignant lesions. Materials and Methods: Of 47 cases, 29 patients with benign prostatic hyperplasia and 18 cases of prostate cancer patients underwent magnetic resonance imaging check, scanning sequences included conventional T1WI, T2WI, DWI and fat suppression imaging. All cases were confirmed by biopsy or surgery. Prostate size, lesion location, signal characteristics and tumor invasion situation were observed. The quantitative analysis of ADC and DWI was applied. Results: 13 of 18 cases with prostatic cancer located in the peripheral zone, the performance were peripheral zone nodules, flaky low signal area in T2WI; 8 cases were in the central zone or transition zone. The sensitivity, specificity, accuracy rate of DWI for the diagnosis of prostate cancer were 81.07%, 78.01%,80.11%, separately. Conclusion: DWI can improve the accuracy rate of diagnosis of prostate cancer.]]></description>
<pubDate>Thu,20 Mar 2014 00:00:00  GMT</pubDate>
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<title><![CDATA[Application of  DWI and SWI muscle hematoma  in lower limb clinical diagnosis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2014.03.010</link>
<description><![CDATA[Objective: To evaluate the diagnostic value of muscle hematoma  in lower limb using the diffusion-weighted imaging (DWI) and susceptibility-weighted imaging (SWI). Materials and Methods: Retrospective analysis between June 2009 to June 2011 by surgery or biopsy and clinical follow-up confirmed the muscle hematoma MRI data of 15 case, all patients were performed with MRI conventional sequences, including T1WI, T2WI, DWI and SWI. Results: In MRI conventional sequences acute and subacute hematoma showed early was to go with muscle or muscle gap consistent long spindle-shaped, in T1WI as equal/high signal intensity, in T2WI showed equal or higher signa intensity. In DWI lesions showed low signal center, surrounded by high signal and SWI showed high signal-based, central was not irregular flakes low signal, visible in varying degrees around the ring of low signal. Late subacute or chronic hematoma was irregular round or fusiform, T1WI and T2WI showed high signal on the upper and lower showed low signal, and the formation of clear liquid fluid level, DWI and high signal SWI upper and lower showed low signal. Conclusions: DWI and SWI sequence can be compared with conventional MR sequences provide more information, as an important complement conventional sequence, can significantly reduce acute and subacute hematoma early misdiagnosis and missed diagnosis.]]></description>
<pubDate>Thu,20 Mar 2014 00:00:00  GMT</pubDate>
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<title><![CDATA[Investigating neuronal metabolic characterization in different areas of brain glioma using 1H MRS at 7.0 T]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2014.03.011</link>
<description><![CDATA[Objective: This study aimed to acquire the metabolite concentrations and metabolic characteristic in four different areas (tumor center, tumor soild part, tumor peritumoral area and contralateral white matter) of brain glioma with the combination of MRS and LCModel method. Materials and Methods: The C6 glioma cells were stereotaxically implanted into the right basal ganglia region of SD rats. The rats then underwent MRS at 7.0 T MR scanner. Neuronal metabolites were measured within the tumor center, tumor solid part, adjacent normal-appearing tissue, and contralateral white-matter. All spectra were quantified by LCModel, the whole datas were statistical analyzed by SPSS. Results: A gradual increased concentrations of NAA, tCr , and a decreased of Ala\ from the tumor center to the contralateral normal white matter were observed. Moreover, the lowest level of Ins and Tau were found in the tumor peripheral area. There were significant differences in Ins and Tau between the tumor peripheral area and other three areas. The highest Glx peaks appeared in the tumor peripheral part. The statistically significant differences in Glx among each region were also found. Conlustions: MRS in ultra high magnetic field is a valuable method to investigate metabolic specificity in different areas of glioma. The MRS data of Tau, Ins and Glx may supply additional information about the location of glioma potential border.]]></description>
<pubDate>Thu,20 Mar 2014 00:00:00  GMT</pubDate>
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<title><![CDATA[Voxel-based morphometry MRI study of gray matter’s alteration in patients with chronic mountain sickness]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2014.03.012</link>
<description><![CDATA[Objective: The aim of the study was to investigate the gray matter (GM) volumes alterations in Chronic Mountain Sickness (CMS) patients by using voxel-based morphometry method (VBM) of magnetic resonance imaging (MRI). Materials and Methods: 14 cases of patients with clinically diagnosed CMS and age, sex, years of education, altitude matched 11 cases of normal volunteers underwent whole brain scan, and 3D-T1 structural images were acquired. Then we used the VBM method compared the whole brain GM differences between CMS group and normal controls. Results: Compared with the control group, increased GM volumes was found in the right lingual gyrus, right posterior cingulate, bilateral parahippocampa gyrus, left ilferior temporal gyrus in CMS group and we also found reduced GM volumes in left anterior cingulated. Conclusions: Based on magnetic resonance structural images, the VBM method could objectively display the volume changes of specific brain areas in CMS patients and revealed the impact of altitude hypoxia on brain structure from the perspective of imaging.]]></description>
<pubDate>Thu,20 Mar 2014 00:00:00  GMT</pubDate>
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<title><![CDATA[Application progress of 1H-MRS in temporal lobe epilepsy]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2014.03.014</link>
<description><![CDATA[Surgical removal of the cause of temporal lobe epilepsy has good effect. 1H-MRS as a kind of noninvasive magnetic resonance imaging technology, become a new method applied in the research of epilepsy in recent years. In this article reviewed the application progress of 1H-MRS in temporal lobe epilepsy.]]></description>
<pubDate>Thu,20 Mar 2014 00:00:00  GMT</pubDate>
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<title><![CDATA[The application of magnetic resonance cell tracing technique in myocardial infarction cell transplantation treatment]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2014.03.015</link>
<description><![CDATA[Stem cell transplantation has the potential to treat myocardial infarction. MRI is emerging as a robust tool to provide anatomical and functional information of patient with cardiovascular disease, but also plays an important role in tracing graft cells. SPIO is one of the most widely used probes, which can identify the graft site accurately. However, the presence of SPIO cannot guarantee the survival of the stem cells and this limits its use. The MRI reporter gene imaging technique can ﬁll this gap to access the survival information of the grafted cells and help researchers to achieve a higher level of understanding of the fate of the cell.]]></description>
<pubDate>Thu,20 Mar 2014 00:00:00  GMT</pubDate>
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<title><![CDATA[Functional magnetic resonance imaging of the lower spinal cord]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2014.03.016</link>
<description><![CDATA[With functional magnetic resonance imaging (fMRI) technology widely used in the study of brain, spinal fMRI researches have also been gradually expanded. Presently, the spinal fMRI is mainly focused on cervical spinal cord and the articles of lower spinal cord is relatively few. The feasibility and effectiveness of lower spinal cord fMRI have been proven through studies of animal experiments and clinical basic trials. Moreover, following-up researches suggest that appropriate application of fMRI technology may have potential clinical value for the location of spinal cord function, therapeutic monitoring and treatment guidance. This paper reviewed the research progress on lower spinal cord (fMRI), and provided certain foundation for the further study in this ﬁled.]]></description>
<pubDate>Thu,20 Mar 2014 00:00:00  GMT</pubDate>
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<title><![CDATA[MR imaging research present situation of HBV related liver cirrhosis nodules multi-step evolution and the latest progress]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2014.03.017</link>
<description><![CDATA[Liver cirrhotic nodules from regenerative nodules (RN), low grade dy-splastic nodules (LGDN), high grade dysplastic nodules (HGDN), finally to the hepatocellular carcinoma (HCC), early identification of liver cirrhotic nodules in different stages is great significance for diagnosis and prognosis. Relative to the conventional CT examination, magnetic resonance imaging (MRI) as a noninvasive method, has made some breakthrough in evaluate the whole liver. In this review, we will summarize the evolution process of cirrhotic nodules.]]></description>
<pubDate>Thu,20 Mar 2014 00:00:00  GMT</pubDate>
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<title><![CDATA[The clinical progress of MRI in the implantation (intrusive) of placenta praevia]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2014.03.018</link>
<description><![CDATA[The high incidence of placenta accreta characterized with placenta overlies uterine scar after previous cesarean section requires special diagnosis and treatment. At present the prenatal diagnosis of pernicious placenta praevia is usually made by ultrasonography, but the ultrasonic diagnosis has its limitations. MRI is a safe imaging method without radiation. MRI provide more evidences for clinical diagnosis for large imaging range，small effect by the intestinal gas and bone, not affected by placental position.]]></description>
<pubDate>Thu,20 Mar 2014 00:00:00  GMT</pubDate>
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