<?xml version="1.0" encoding="utf-8" ?>
<rss version="2.0">
<channel>
<title>Chinese Journal of Magnetic Resonance Imaging RSS feed</title>
<link>http://med-sci.cn/cgzcx/en/contents_list.asp?issue=201201</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
<item>
<title><![CDATA[Innovation and development of medical magnetic resonance technology in the 12th Five-Year Plan period for national economic and social development of the People<sup><sup>,</sup></sup>s Republic of China]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.01.001</link>
<description><![CDATA[This paper expounds the principle and direction of innovation and development about medical magnetic resonance technology in the 12th Five-Year Plan period for national economic and social development of the People's Republic of China, according to the 12th Five-Year Plan of the medical scientific and technical development, and the 12th Five-Year Special Plan of scientific and technical development in medical equipment industry.]]></description>
<pubDate>Fri,20 Jan 2012 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[Attaching importance to rational and appropriate application of new MRI techniques in brain tumor diagnosis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.01.002</link>
<description><![CDATA[Being applied to clinical fields, there are several MRI novel technologies playing different roles in reflecting brain tumor’s morphology, hemodynamic, metabolism, and the resulting structural and functional changes. Large data sample are required to validate the rational and standard use of these technologies, so that they may play the guiding role in clinical diagnosis and treatment. This review provides a brief introduction of new MRI techniques and their application value in brain tumor diagnosis, aiming for more rational and appropriate application of these new technologies.]]></description>
<pubDate>Fri,20 Jan 2012 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[Preliminary study of multivoxel 1H-MR spectroscopy in patients with moderate to severe obstructive sleep apnea hypopnea syndrome pre-and post-uvulopalatopharyngoplasty]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.01.003</link>
<description><![CDATA[Objective: To investigate the clinical usage of multivoxel 1H magnetic resonance spectroscopy (1H-MRS) in patients with obstructive sleep apnea hypopnea syndrome (OSAHS) pre- and post-uvulopalatopharyngoplasty (UPPP). Materials and Methods: Twenty cases of moderate to severe OSAHS underwent UPPP and performed brain multivoxel 1H-MRS examinations in pre-and post-operation. The ratios of brain metabolites of centrum ovale and basal ganglia were recorded and analyzed, respectively. Results: In the centrum ovale, the postoperative NAA/Cr and NAA/Cho of 2.422±0.265 and 1.487±0.168 was signiﬁcantly higher than that of the preoperative (2.199±0.143 and 1.163±0.170, P ＜0.05). The postoperative Cho/Cr (1.580±0.175) significantly decreased than that of the preoperative (1.768±0.113, P ＜0.05). In the basal ganglia, postoperative NAA/Cr, NAA/Cho (1.995±0.131 and 1.673±0.155, respectively) was slightly increased than that of the preoperative (1.932±0.155 and 1.568±0.141). The the postoperative Cho/Cr of 1.181±0.129 decreased than that of the preoperative (1.262±0.134), but the difference was not significant (P ＞0.05). Conclusion: Multivoxel 1H-MRS may be useful for brain metabolism in patients with OSAHS pre-and post-UPPP.]]></description>
<pubDate>Fri,20 Jan 2012 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[Study of magnetic resonance diffusion tensor imaging in diabetic optic neuropathy]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.01.004</link>
<description><![CDATA[Objective: To explore the value of magnetic resonance diffusion tensor imaging (MR-DTI) in diabetic optic neuropathy. Materials and Methods: Fifteen patients with bilateral diabetic optic neuropathy and 15 healthy subjects were recruited with optic nerve scann by 3.0 T-MR-DTI. The metrics of fractional anisotropy (FA), mean diffusion coefficient (MD), eigenvalue ∥ (λ∥), and eigenvalue ⊥ (λ⊥) values of diabetic optic nerve fibres were calculated and compared between the 2 groups. Results: FA, MD, λ∥, λ⊥ values of diabetic optic nerve fibres were 0.321±0.090, (1808±431)×10-6 mm2/s, (2393±273)×10-6 mm2/s, (1488±467)×10-6 mm2/s, respectively. They were 0.585±0.020, (935±133)×10-6 mm2/s, (1654±157)×10-6 mm2/s, (1026±492)×10-6 mm2/s in controls, respectively. The MD, λ∥, λ⊥ values were higher in affected nerve fibres (P =0.000), but FA value were lower than control nerve fibres (P =0.000). Conclusion: MR-DTI is useful in detecting diabetes optic neuropathy.]]></description>
<pubDate>Fri,20 Jan 2012 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[Application of magnetic resonance hydrography technique in imaging of inner ear and diagnosis of inner ear diseases]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.01.005</link>
<description><![CDATA[Objective: To compare 3 kinds of post-processing methods of magnetic resonance hydrography (MRH) technology (MPR, MIP and VR) in the usage of  inner ear. Materials and Methods: Thirty-five patients with sensorineural hearing loss (SNHL) and 40 controls were recruited. High-resolution three-dimensional turbo spin echo T2WI (3D TSE T2WI) axial scanning and bilateral oblique sagittal scanning were performed in each subject with the data transmitted to the workstation for reconstruction by ViewForum. The data of inner ear was compared among different reconstruction modalities. Results: (1) Subtle anatomical structures of cochleovestibular nerve, facial nerve, and inner ear could be clearly shown in 80 ears of 40 adults. (2) The height of semicircular canals and diameter of upper and lateral semicircular canals were different between VR and MIP (P =0.001, P =0.000). (3) MPR was superior in displaying CN, FN, SVN and IVN; the scores of VR are higher than that of MPR and MIP in displaying the structure of V, PSC, SSC and HSC. Conclusion: Among the 3 methods of post-processing, MPR is the best to show the nerves of the labyrinth. VR is the best to display the details of  inner ear diseases.]]></description>
<pubDate>Fri,20 Jan 2012 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[Preliminary study of diffusion tensor imaging in cervical spondylotic myelopathy]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.01.006</link>
<description><![CDATA[Objective: To explore the sensibility of diffusion tensor imaging (DTI) in early detecting spinal cord injury in cervical spondylotic myelopathy. Materials and Methods: Cervical routine MRI and DTI were performed in 13 healthy volunteers and 13 patients with cervical spondylotic myelopathy. The radiological ﬁndings were analyzed, and the apparent diffusion coefficient (ADC) values and the fractional anisotropy (FA) values were calculated, and spinal cord ﬁber bundle was reconstructed. Results: Compared with control group, the mean ADC and FA values were higher (t=8.495, P＜0.001) and the mean FA was lower (t=-14.328, P＜0.001). The DTI color maps found abnormal signal at the compressed spinal cord. T2WI showed high signal at the compressed spinal cord in 4/13 (30.8%) patients. Fisher statistics proved that DTI was more sensitive than routine MRI (P=0.002). Conclusion: DTI can provide information about the pathology. It is more sensitive in early detecting spinal cord injury in cervical spondylotic myelopathy than routine MRI.]]></description>
<pubDate>Fri,20 Jan 2012 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[Comparative study of MRI characteristics between posterior reversible encephalopathy syndrome and MELAS syndrome]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.01.007</link>
<description><![CDATA[Objective: To compare the MRI characteristics of posterior reversible encephalopathy syndrome with that of MELAS syndrome. Materials and Methods: Twenty-one patients with PRES and 6 patients with MELAS syndrome were recruited. MRI findings, including the location, signal intensity, and functional characteristics, were retrospectively analyzed. Results: Lesions in the subcortical white matter were found in 21 patients with PRES, and involved cortex in 13 patients. Lesions located in the cortex and subcortical were revealed in 6 patients with MELAS. On DWI, low signal intensity was revealed in 19 patients with PRES; high signal intensity was shown in acute MELAS with isointensity in remission. Decreased cerebral blood volume (CBF) was found in 2 cases of PRES. Increased CBF in 2 cases of MELAS syndrome. Conclusion: Detailed MRI analysis is helpful for the differentiation of PRES and MELAS syndrome.]]></description>
<pubDate>Fri,20 Jan 2012 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[MRI diagnosis of different levels of oligodendrogliomas]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.01.008</link>
<description><![CDATA[Objective: To explore the imaging features in two types of oligodendrogliomas and their histopathological manifestations for better clinical differential diagnosis and treatment guidance. Materials and Methods: We retrospectively examined MRI findings and their histologic correlations of total 59 oligodendroglioma cases diagnosed with both low grade and anaplastic oligodendroglial tumor. Results: There were 37 low grade (WHO Ⅱ grade) and 22 anaplastic (WHO III grade) oligodendrogliomas in this study.  Among 37 low grade (WHO Ⅱ grade) cases, the tumor was mostly seen in gray-white matter junction of parietal lobe; 34 cases had blurred margin and 3 cases had well-demarcated margin; on T1-weighted images, the tumor showed hypointense in 33 cases and isointense in 4 cases, on T2-weighted images, the tumor showed hyperintensities on T2-weighted images in 37 cases with mild tumoral enhancement in 30 cases and heterogeneous enhancement in 7 cases; there was other pathological changes such ascalcification (n =32), cystic degeneration (n =7), hemorrhage (n =8), peritumoral edema (n =5). In contrast, among 22 anaplastic oligodendrogliomas (WHO Ⅲ grade), the tumor was mostly seen in the gray-white matter junction of temporal cortex, 21 cases had clear boundary and 1 case with poorly-defined boundary, the tumor showed hypointensities on T1-weighted images in 19 cases and isointensities in 3 cases, the tumor showed hyperintensities on T2-weighted images in 19 cases mild enhancement in 5 cases and significant enhancement in 17 cases, other pathologic findings including cystic necrosis (n =12), hemorrhage (n =9), and peritumoral edema (n =22). Conclusion: We have described the MRI features such as cystic necrosis, hemorrhage, edema, and enhancement that are useful in differentiating the two types of oligodendrogliomas.]]></description>
<pubDate>Fri,20 Jan 2012 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[Contrast-enhanced 3.0 T MR imaging of coronary arteries: comparison of gadobenate dimeglumine and gadoxetic acid]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.01.009</link>
<description><![CDATA[Objective: To compare the image quality and display of coronary artery segments between intravascular contrast agents gadobenate dimeglumine and extravascular contrast agents gadoxetic acid at 3.0 T contrast-enhanced whole-heart coronary magnetic resonance angiography (CE CMRA ) prospectively. Materials and Methods: Thirty patients which complied with the requirements were randomly divided into Group A (15 cases, with intravascular contrast agents gadobenate dimeglumine) and Group B (15 cases, with the blood vessels contrast agents gadoxetic acid). All cases were underwent CE CMRA at 3.0 T MRI scanner. Statistical analysis was performed in signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR) and display of coronary artery segments. Results: CE CMRA was performed successfully in 30 cases. The SNR and CNR in Group A was 157.48±64.21 and 139.77±63.56, respectively. They were 71.56±33.21 and 50.75±29.71 in group B, respectively. The difference was signiﬁcant (P=0.008, P=0.005). The difference was also found in the display of coronary artery segments between two groups, especially, between the distal of the circumﬂex segments (P=0.027). Conclusion: Gadobenate dimeglumine can provide better image quality than gadoxetic acid in CE CMRA.]]></description>
<pubDate>Fri,20 Jan 2012 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[Study of magnetic resonance imaging at 1.5 Tesla based on pH-sensitive magnetization transfer technology]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.01.010</link>
<description><![CDATA[Objective: To investigate the feasibility of magnetization transfer  (MT) technology in application of magnetic resonance pH imaging on 1.5 T clinical MR scanner. Materials and Methods: Two groups of agarose-creatine pH phantoms were prepared and imaged by improved spin-echo-magnetization transfer pulse sequence. Results: At radiofrequency offset of 224 Hz, the signal intensity magnetization transfer image of same pH phantoms showed no difference. The signal intensity of different pH phantoms depended on pH values. The higher pH was, the stronger signal intensity was. Conclusions: pH-sensitive magnetization transfer image can be acquired by improving the parameters and choosing appropriate radiofrequency offset of spin-echo-magnetization transfer pulse sequence on clinical 1.5 T MR scanner. This experimental study laid a solid foundation for further clinical applications.]]></description>
<pubDate>Fri,20 Jan 2012 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[Comparative study of MRI R2* with different ROI measurement in iron-overloaded liver]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.01.011</link>
<description><![CDATA[Objective: To compare the differences of two kinds of ROI measurements of MRI liver R2* with iron overload. Materials and methods: Thirty-two adult healthy New Zealand rabbits were randomly divided into 4 groups, with 3 groups received intravenous injection of Iron Sucrose with different concentrations every 1 week for 4 weeks. After liver scan was performed by 3.0T MR scanner with 2D MFGRE sequence, the animals were sent for LIC assessment immediately. The R2* value were measured on R2* Map with whole liver and small region-of interest (ROI) selection by 2 observers, independently. The R2* value was compared between intra- and inter-observer; from the whole liver and the ROI, respectively. Results: The data from 2 types of measurement was consistent (P >0.05, ICC=0.99). The R2* value measured from the whole liver was smaller than that of ROI selection (P <0.05). Conclusion: To analyze the over-loaded liver by MRI R2*, the whole liver measurement is superior to the ROI positioning.]]></description>
<pubDate>Fri,20 Jan 2012 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[Placing a greater emphasis on anatomic structures of the brain]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.01.012</link>
<description><![CDATA[The advantages of modern neuroimaging technology (mainly focused on MRI) in demonstrating cerebral anatomic structures are introduced in this article. The relevant imaging diagnosis is discussed. Some common or easily neglected pitfalls or questions on neuroimaging diagnosis are listed. The importance of continuous learning on related knowledge and expertise is emphasized for neuroradiologists.]]></description>
<pubDate>Fri,20 Jan 2012 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[MR contrast media of liver: the past, present and future]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.01.014</link>
<description><![CDATA[MR contrast media has been widely used in the diagnosis and researches of liver lesions. For a further understanding, the past and the present status of contrast media used in liver MRI are reviewed, focused on the medical diagnosis and researches. The perspective is also discussed.]]></description>
<pubDate>Fri,20 Jan 2012 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[Functional MRI in neuropsychiatric disorders]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.01.015</link>
<description><![CDATA[Brain functional magnetic resonance imaging (fMRI) can help locate the functional areas in human brain, and study the functional connectivity between the brain regions. Based on the modes of the task state and resting state, present review summarized clinical advances of fMRI in the pathogenesis, diagnosis, treatment and prognosis of neuropsychiatric disorders from the local brain function to the functional connectivity beween brain regions to the brain functional network.Future researches need to combine multi-methods and to cooperate with multi-disciplines to explore specific neuroimaging markers in those disorders. Thus imaging technique may eventually be used to help with early detection, early intervention and prognosis judgement.]]></description>
<pubDate>Fri,20 Jan 2012 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[Application of BOLD-fMRI in cerebral neoplasms]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.01.016</link>
<description><![CDATA[Blood oxygen level dependent-functional magnetic resonance imaging (BOLD-fMRI) is an important part of functional magnetic resonance imaging (fMRI). Its greatest advantage is to display activity of the cerebral cortex. With BOLD-fMRI, the affected cortical areas by neoplasms can be shown, which may do help to tumor diagnosis, treatment and prognosis. The applications of BOLD-fMRI in cerebral neoplasms are reviewed in this article.]]></description>
<pubDate>Fri,20 Jan 2012 00:00:00  GMT</pubDate>
</item>
<item>
<title><![CDATA[Assessment of neonatal brain development by diffusion tensor imaging]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.01.017</link>
<description><![CDATA[Diffusion tensor imaging (DTI) is a novel, sensitive, and quantified technique to detect the diffusion feature of water molecule. In this paper, we reviewed the basic principle and parameters of DTI, the processing methods of DTI data, and the different changes of parameters of DTI with the neonatal brain white matter and gray matter. It showed that parameters of DTI changed regularly with development of premature and neonatal brain white matter, and DTI is helpful to evaluate the development of brain white matter quantitatively.]]></description>
<pubDate>Fri,20 Jan 2012 00:00:00  GMT</pubDate>
</item>
</channel>
</rss>
