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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=201005</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
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<title><![CDATA[Evidence-based guideline: The role of diffusion and perfusion MRI for the diagnosis of acute ischemic stroke: explanation and viewpoint]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2010.05.002</link>
<description><![CDATA[Recently, Therapeutics and Technology Assessment Subcommittee of the American Academy of Neurology reported the Evidence-based guideline: The role of diffusion and perfusion MRI for the diagnosis of acute ischemic stroke. The guideline retrospectively assessed the evidence for the use of diffusion-weighted imaging (DWI) and perfusion weighted imaging (PWI) in the diagnosis of patients with acute ischemic stroke, and provided 6 pieces of recommendations. In this article, the main contents of the guideline and its related evidences were reviewed and evaluated.]]></description>
<pubDate>Thu,20 May 2010 00:00:00  GMT</pubDate>
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<title><![CDATA[ACCF/ACR/AHA/NASCI/SCMR 2010 Expert Consensus Document on Cardiovascular Magnetic Resonance: explanation and viewpoint]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2010.05.003</link>
<description><![CDATA[American College of Cardiology Foundation (ACCF) Task Force on Clinical Expert Consensus Documents (ECDs), united the American College of Radiology (ACR), American Heart Association (AHA), North American Society for Cardiovascular Imaging (NASCI), and the Society for Cardiovascular Magnetic Resonance (SCMR), to provide a consensus document on the current state of cardiovascular magnetic resonance (CMR). It serves the following purposes: 1) it introduces the basic instrumentation, physics, scan techniques, safety parameters, and contraindications associated with CMR acquisitions; 2) it reviews the use of CMR for assessing patients with cardiovascular disease processes; 3) unique capabilities of image data generated with CMR are provided relative to other imaging techniques. In this article, we review the main contents of the consensus document from the imaging theory of CMR, the role of CMR for evaluation of cardiovascular structure and function, clinical use of CMR, and the safety of CMR.]]></description>
<pubDate>Thu,20 May 2010 00:00:00  GMT</pubDate>
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<title><![CDATA[Changing of the diagnostic criteria of arrhythmogenic right ventricular cardiomyopathy/ dyspepsia (ARVC/D): value of MR imaging in the diagnosis of ARVC/D]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2010.05.004</link>
<description><![CDATA[In 1994, a proposed criteria of arrhythmogenic right ventricular cardiomyopathy / dyspepsia (ARVC/D) was firstly reported by an International Task Force on British Heart Journal (Br Heart J 1994; 71: 215-218). Consequently, the 1994 criteria were highly specific but lacked sensitivity for early and familial disease. In 2002, the diagnostic criteria of familial ARVC/D was reported on Journal of the American College of Cardiology (J Am Coll Cardiol 2002; 40: 1445-1450) to deepen the understanding of the etiology and pathology of ARVC/D. In April 2010, the new revised diagnostic criteria was published on European Heart Journal (Eur Heart J 2010; 31: 806-814), in this modification of the Task Force criteria, quantitative criteria of MRI and ultrasonography  are proposed as the essential stipulation. In this article, the diagnostic criteria of ARVC/D were reviewed and the diagnostic value of MRI for ARVC/D was evaluated with the literature review.]]></description>
<pubDate>Thu,20 May 2010 00:00:00  GMT</pubDate>
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<title><![CDATA[The ankle joint: MR sectional anatomy, anatomic variation and pathology. Part II: variation and pathology]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2010.05.005</link>
<description><![CDATA[Ankle pain is a very common clinical presentation.  There are many disorders that can cause ankle pain. This article reviewed the MRI features of common etiologies that cause ankle pain in the following three categories:  (1) Ligamentous injuries, that are commonly classified into lateral ankle injuries, medial ankle injuries, and high ankle (syndesmotic) injuries. Of the acute ligament injury, the ligament shows increased signal with adjacent surrounding soft tissue edema on MR imaging, and partial tear of the ligament is observed. Chronic ligament injuries mainly represent thickening or thinning, discontinuity or nonvisualization of the ligament. (2) Tendon disorders, that include tendinopathy, tendon tears, tenosynovitis, peritendinitis and dislocation. Traumatic tendon tear is uncommon, discrete tears of the ankle tendons commonly occur on a background of tendinopathy. MRI can accurately show the characteristics of the disorders above. (3) Bone, cartilage and other soft tissue disorders, including subtle fracture of the anterior process of the calcaneus, tarsal coalition, accessory navicular syndrome, Os Trigonum syndrome, osteochondral lesion of the talus, and avascular necrosis of the talus. MRI can make diagnosis or differential diagnosis from the disorders.]]></description>
<pubDate>Thu,20 May 2010 00:00:00  GMT</pubDate>
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<title><![CDATA[Diagnostic imaging of AIDS in China: current status and clinical application]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2010.05.006</link>
<description><![CDATA[Due to the extremely suppressed or even destroyed immune system of HIV carriers, AIDS often causes various opportunistic infections or related neoplasms to impair organs. Meanwhile, the complications of AIDS are the main causes of death in AIDS patients, the keys for improving the therapeutic efficacy of AIDS and life quality of AIDS patients are early identification of HIV carriers, advanced prevention of AIDS complications and accurate diagnosis of AIDS. Magnetic resonance imaging (MRI) can make differential diagnosis of inflammation, edema, neoplasms, especially of central nervous systems disease because of its high-resolution to soft tissue, and MR spectroscopy can determine the changes of body metabolites. So MR imaging techniques play an important role in early diagnosis, evaluation of therapeutic effect, following up of AIDS patients.]]></description>
<pubDate>Thu,20 May 2010 00:00:00  GMT</pubDate>
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<title><![CDATA[MR spectroscopy for evaluation of cognitive impairment in AIDS patients]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2010.05.007</link>
<description><![CDATA[Objective: To assess the value of MR spectroscopy in the diagnosis of cognitive impairment in AIDS patients. Materials and Methods: 3.0 T MR was used to measured NAA, Cho, MI and Cr in the frontal white matter, basal ganglia and parietal cortex of 21 AIDS patients with dementia complex (ADC), 19 neuroasymptomatic AIDS patients (NAS) and 20 seronegative controls (SN), respectively; and then compared the difference of metabolic rate between AIDS  patients and SN controls. Results: NAA/Cr (1.2502) was signiﬁcantly decreased and Cho/Cr (1.2028) was increased in the frontal white matter in ADC group, while NAA/Cr (1.5334) was reduced in NAS group compared with that in SN group, NAA/Cr in the basal ganglia was decreased in both ADC and NAS groups (1.2625 and 1.5278, respectively), Cho/Cr (1.1631) was obviously increased in ADC group. Although NAA/Cr, Cho/Cr and MI/Cr in the parietal cortex had some degree of change in both ADC and NAS groups compared with SN group, but the difference has not statistically signiﬁcant. Conclusion: The brain metabolite changes of AIDS patients are correlated with cognitive impairment. MR spectroscopy can be used as a valuable method to assess cognitive impairment in AIDS patients.]]></description>
<pubDate>Thu,20 May 2010 00:00:00  GMT</pubDate>
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<title><![CDATA[Imaging appearance of toxoplasma encephalopathy in AIDS patients]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2010.05.008</link>
<description><![CDATA[Objective: To characterize the cranial imaging findings of toxoplasma encephalopathy in AIDS patients. Materials and Methods: A retrospective review of 10 human AIDS patients with toxoplasma encephalopathy was performed. Head computed tomography (CT) and magnetic resonance imaging (MRI) were reviewed. Results: There were 30 lesions found in 10 patients, the number of lesions for each patient ranged from 2 to 7, there were 20 nodular or oval lesions among the 30 lesions. Before contrast injection, all the lesions were low density on CT; after intravenous contrast injection, there were 7 lesions showed ring enhancement. For the MRI, all lesions were predominantly hypointense on T1-weighted images, all the lesions were hyperintense on T2-weighted images. Post-contrast imaging revealed ring enhancement in 8 lesions, including 2 target enhancement. Patients with CD4+ T lymphocyte count above 50 cell/μl compared with CD4+ T lymphocyte count less than 50 cell/μl was more likely with ring or nodular enhancement (Chi-square test, P=0.009). Conclusion: Toxoplasma encephalopathy showed multiple lesions, many of the lesions involved the cerebral hemispheres, basal ganglia and thalamus, the lesions form were predominantly nodular or oval, patients with relatively higher CD4+ T lymphocyte count was of more ring enhancement after injection of contrast agent.]]></description>
<pubDate>Thu,20 May 2010 00:00:00  GMT</pubDate>
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<title><![CDATA[MR imaging findings of AIDS with tuberculous meningitis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2010.05.009</link>
<description><![CDATA[Objective: To compare the MR imaging findings between patients of AIDS with tuberculous meningitis (TM) and non-AIDS TM patients. Materials and Methods: MR imaging ﬁndings were analyzed retrospectively in 17 cases of AIDS with TM and 22 cases of non-AIDS TM, the differences of MR imaging ﬁndings were compared in the two groups. Results: Tuberculous abscess in AIDS patients were signiﬁcantly less than that of non-AIDS patients (4/17, 0/22 respectively; P<0.05). While no significant differences were revealed between meningeal enhancement, tuberculomas, cerebral infarction, and communicating hydrocephalusin in AIDS and non-AIDS patients with TM. Conclusion: The MR imaging findings of TM were similar between the patients with AIDS and with non-AIDS, but the imaging ﬁndings of intracerebral inflammation were less in patients with AIDS than that of non-AIDS patients, and tuberculous abscess was ease to gain in patients with AIDS. MR examination is helpful in the diagnosis of TM in AIDS patients.]]></description>
<pubDate>Thu,20 May 2010 00:00:00  GMT</pubDate>
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<title><![CDATA[MRI performance of AIDS combined with opportunistic infections of the brain]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2010.05.010</link>
<description><![CDATA[Objective: To investigate the MRI characteristics of AIDS combined with opportunistic infections of the brain. Materials and Methods: The MRI manifestations of AIDS with brain infection were retrospectively analyzed. Results: A total of 23 cases, 12 cases of toxoplasmosis, mainly involved the basal ganglia and the junction of gray matter and white matter of cerebral hemisphere, "target sign" was the characteristic performance; cryptococcal infection in 5 cases, mainly caused cryptococcal meningitis, brain colloidal false capsule was the characteristics; tuberculosis infection in 6 cases, with simple violations of rare brain parenchyma, in different time, the lesions involving brain parenchyma was vary. Conclusion: The MRI performance of AIDS combined with infection in the brain is characteristic.]]></description>
<pubDate>Thu,20 May 2010 00:00:00  GMT</pubDate>
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<title><![CDATA[Diffusion-weighted MR imaging in assessment of primary adrenal tumors at 3.0 T]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2010.05.011</link>
<description><![CDATA[Objective: To evaluate the value of diffusion weighted imaging (DWI) and apparent diffusion coefficient (ADC) at 3.0 T MR in primary adrenal tumors. Materials and Methods: DWI images of 48 patients with primary adrenal tumors proved by surgical pathology were retrospectively reviewed. ADC values of tumors were statistically analyzed. Results: The mean ADC value of neoplasms were listed below: ganglioneuromas (n=5), 1.948±0.357×10-3 mm2/s; benign pheochromocytomas (n=7, including 1 case with bilateral tumor), 1.666±0.547×10-3 mm2/s; cortical adenomas (n=21), 1.434±0.430×10-3 mm2/s; primary adrenal malignant tumors(n=8, including 7 adrenal cortical carcinomas and 1 malignant pheochromocytoma), 0.951±0.144×10-3 mm2/s; myelolipomas (n=7), 0.764±0.209×10-3 mm2/s. Except myelolipomas, given ADC value of 1.08×10-3 mm2/s as a threshold for diagnosing primary adrenal malignant tumor, the sensitivity, specificity and accuracy were 87.50%, 85.29% and 85.71%, respectively. There were significant differences between primary adrenal tumors and ganglioneuromas, benign pheochromocytomas and cortical adenomas (P=0.003, 0.006 and 0.001, respectively). However, no statistic difference was found between primary adrenal malignant tumors and myelolipomas. Conclusion: 3.0 T MR DWI could be used in diagnosis of primary adrenal tumors, and ADC value might be helpful in differentiating the adrenal pathology.]]></description>
<pubDate>Thu,20 May 2010 00:00:00  GMT</pubDate>
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<title><![CDATA[Three-dimensional T2 star weighted angiography and DSC-perfusion MR imaging for ischemic stroke]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2010.05.012</link>
<description><![CDATA[Objective: To investigate the relationship between perfusion MRI and the changes of small vessels around the infarction. Materials and Methods: Twenty-nine patients with ischemic infarction of unilateral hemicerebrum underwent T1WI, T2WI, 3D SWAN and DSC-PWI. Among these patients, 10 had follow-up MR scan after treatment. There were 39 person-time MR scans in total. Compared the changes of small vessels on 3D SWAN with the perfusion manifestation on DSC-PWI and analyze the relationship between them. Results: In the 39 cases, there were more, thick and black small vessels of 26 cases on 3D SWAN. Among them, 23 cases had hyperperfusion (19 collateral circulation, 3 reperfusion, 3 hyperperfusion and 1 hypoperfusion) on perfusion MRI; There were less, thin and light vessels of 13 cases. Among these 13 cases, 9 were hypoperfusion, 3 had collateral circulation and 1 was reperfusion. None of them was hyperperfusion. With chi square test, there was a significant difference between the small vessels change and the perfusion manifestation around the infarction lesion (P<0.05). Conclusion: The small vessels change around the infarction lesion indirectly reﬂect the perfusion manifestation, the small vessels become more, thick and black correlated with hyperperfusion, and the small vessels turned less, thin and light correlated with hypoperfusion.]]></description>
<pubDate>Thu,20 May 2010 00:00:00  GMT</pubDate>
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<title><![CDATA[Technical detail of BLADE]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2010.05.013</link>
<description><![CDATA[The motion of patients induces obvious artifacts or ghosts in phase encoding direction during MR scanning. Artifacts or ghosts are generally considered as the result of different position of tissue between shots due to motion. Techniques like 1D or 2D navigator are widely used to eliminate or alleviate artifacts or ghosts in clinical scanning, while another sequence BLADE or PROPELLER with self navigator is introduced in this work which combines Turbo Spin Echo and radial sampling. This work will firstly introduce the sampling trajectory, motion correction and image reconstruction, and end up with the discussion of scanning time, advantage and disadvantage of BLADE.]]></description>
<pubDate>Thu,20 May 2010 00:00:00  GMT</pubDate>
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<title><![CDATA[Diagnostic imaging of AIDS-related nervous system infections]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2010.05.014</link>
<description><![CDATA[HIV-related nervous system infections are the major complications of AIDS, which constitute the commonly found causes of death. Diagnostic imaging plays an indispensable role in the diagnosis and differential diagnosis of AIDS related nervous system infections. This article intended to introduce the diseases spectrum of AIDS complications and their imaging demonstrations, as compared to their pathological and autopsy findings, to explain their pathogenesis. Diagnostic imaging was also evaluated in the diagnosis and treatment of AIDS related nervous system infections.]]></description>
<pubDate>Thu,20 May 2010 00:00:00  GMT</pubDate>
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<title><![CDATA[Current status of small animal brain functional MRI]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2010.05.015</link>
<description><![CDATA[This review describes the present status of the technological development and neuroscience application of BOLD-fMRI on small animals. Also, a using of small animals in exploring bloodless fMRI techniques is briefly introduced as well. Extremely high magnet is essential and small animals require anesthesia during fMRI data acquisition. In spite of such limitations, impressive contributions having been made by small animal fMRI studies in neuroscience and neuropharmacology fields have gained great attention in brain research community to realize its potential.]]></description>
<pubDate>Thu,20 May 2010 00:00:00  GMT</pubDate>
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<title><![CDATA[Study progress of neuroimaging on internet addiction]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2010.05.016</link>
<description><![CDATA[With the computer and internet penetration, internet addiction has been paid close attention to as a social problem. At present, most of studies mainly relate to definition, classification, epidemiology, diagnostic scale, treatment of internet addiction. However, it is still relatively rare to explore on the neuroimaging. This article reviewed and analyzed the recent studies on the neuroimaging of internet addiction, introduced the method of imaging studies, and demonstrated the changes in brain structure and function of internet-addicted persons, so it could contribute to provide theoretical basis for further research and treatment of internet addiction.]]></description>
<pubDate>Thu,20 May 2010 00:00:00  GMT</pubDate>
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