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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=201102</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
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<title><![CDATA[The value of MR imaging in early diagnosis of rheumatic arthritis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2011.02.001</link>
<description><![CDATA[Rheumatic arthritis is a series of diseases characterized by synovitis resulting in cartilage, bone, joint, muscle and ligament damage, which includes rheumatoid arthritis(RA), ankylosing spondylitis (AS), osteoarthritis (OA), systemic lupus erythematosus (SLE), gout and scleroderma etc. These diseases will eventually develop to joint deformity and joint dysfunction. Early clinical interference would slow the progress of the diseases, so it’s very important to diagnose as early as we can. MR imaging is sensitive to detect the changes of synovium, cartilage, ligament etc. During the past few years, MRI has developed to be a useful tool to diagnose and make a differential diagnosis of different rheumatic arthritis. In this article, we summarize the MRI characterization of different rheumatic arthritis to invstigate the value of MR imaging in early diagnosis of rheumatic arthritis.]]></description>
<pubDate>Sun,20 Feb 2011 00:00:00  GMT</pubDate>
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<title><![CDATA[High resolution MR angiography of digital arteries in systemic sclerosis patients on 3.0 T: preliminary study]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2011.02.002</link>
<description><![CDATA[Objective: We sought to evaluate the use of high-resolution three-dimensional time-of-ﬂight (3D-TOF) MRA at 3.0 T in the visualization of digital arteries in systemic sclerosis (SSc) patients. Materials and Methods: Thirty patients with SSc(mean±SD age 35.4 ± 8.9 years, median number of years since onset of Raynaud's phenomenon 3.2 ± 2.7 years) and 7 healthy controls (mean ± SD age 30.7 ± 3.5 years) were examed on a 3.0 T MR system. A modiﬁed high-spatial-resolution(voxel size=0.35 × 0.35 × 0.5 mm3) 3D-TOF MRA (TR/TE=19/4.4 ms, FA = 15°, slice thickness = 1 mm) were performed during a total scan time of 8 min 22 s. The source images and MIP reconstruction were studied, the digital arteries count and lumen area of the selective section of the vessel were measured independently by two experienced radiologists and compared with that of the control ones, and a four-level grading system was made according to the severity. Statistical analysis was performed with t test and P < 0.05 was used as the criterion. Reults: We detected the 8 digital arteries in the four fingers(without the thumb) of each case and got a 47.58% presentation in general in SSc group, and artery No.5 had the highest presentation rate (70.97%). Statistics showed the digital artery No.1 (P = 0.058) and No.3 (P = 0.093) had no difference in the lumen area (P > 0.05). Conclusion: MR angiography of the digital arteries in the described technique is a promising method for us to judge the severity of finger vessels involved in SSc patients.]]></description>
<pubDate>Sun,20 Feb 2011 00:00:00  GMT</pubDate>
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<title><![CDATA[Role of diffusion-weighted MRI in detecting active sacroiliitis of ankylosing spondylitis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2011.02.003</link>
<description><![CDATA[Objective: To evaluate the value of diffusion-weighted imaging in detecting active sacroiliitis in patients with ankylosing spondylitis (AS). Materials and Methods: Based on the modified NEW YORK criteria for AS, 78 patients with chronic low back pain were diagnosed AS. They were divided into two groups as active group (n =34) and chronic group (n =44) by rheumatologist according to BASDAI and laboratory parameters. Twenty-five healthy adults were as control group. FSE-T1WI, FSE-T2WI, FS-FSE-T2WI, and DWI (SS-EPI) (b values: 0, 300 s/mm2) images were obtained in oblique conronal planar. Apparent diffusion coefﬁcient (ADC) values of all sacroiliac joints (SIJs) were measured on ADC maps. ADC values of normal sacral were also measured. rADC(ADC of SIJ/ADC of sacral) was calculated. Mean (ADC) values  and mean rADC values were compared between groups. Results: Mean ADC value of SIJs in active group (0.821×10−3 mm2/s) was signiﬁcantly higher than that of control group (0.589×10−3 mm2/s) and chronic group (0.622×10−3 mm2/s). Mean ADC value of sacral in control group (0.635×10−3 mm2/s) was higher than that of active group (0.486×10−3 mm2/s) and chronic group (0.423×10−3 mm2/s). Multiple comparisons shows that differences of mean ADC value of sacral between groups were signiﬁcant (P <0.05). rADC value of control group (0.959) was close to 1 and signiﬁcantly lower than that of chronic group (1.558) and active group (1.752). Conclusion: DWI is a sensitive, fast sequence. It is a good alternative for imaging sacroiliac joints. DWI also offers quantitive analysis of the lesions. It shows high value in detecting active sacroiliitis in patients with AS.]]></description>
<pubDate>Sun,20 Feb 2011 00:00:00  GMT</pubDate>
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<title><![CDATA[Value of MR imaging in early rheumatoid arthritis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2011.02.004</link>
<description><![CDATA[Objective: To discuss the role of MR imaging in early rheumatoid arthritis (ERA). Materials and Methods: The study group consisted of 35 patients diagnosed ERA. All the conventional X-ray and MRI images of wrists and ﬁngers were reviewed. All the MRI examinations were performed on a Philips Achieva 3.0 T sacanner.  Results: Abnormalities in 35 ERA patients included synovitis, tenosynovitis, joint effusion, bone marrow edema and bone erosions. MRI revealed synovitis in 33 of 35 (94.3%), showing thickened synovium and obvious enhancement after the administration of gadolinium. Tenosynovitis was shown as thickened synovium around the tendon or effusion under the synovial sheath. The extensor carpi ulnaris was the most involved in 20 of 28 (71.4%). Twenty-seven bone erosions were revealed in 25 patients on MRI. MRI was statistically more sensitive than conventional radiography for detecting bone erosions in RA, P <0.01. Bone marrow edema in 15 patients appeared as a lesion with ill-deﬁned margins and high signal, located surrounding the bone erosions.  Conclusion  Bone erosions may be found in the early process of RA. Abnormalities of synovium, synovial sheath and bone can be well described on MRI. MRI is a useful modality for evaluation of patients with early rheumatoid arthritis.]]></description>
<pubDate>Sun,20 Feb 2011 00:00:00  GMT</pubDate>
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<title><![CDATA[Value of fat suppression techniques in the MR imaging diagnosis of polymyositis and dermatomyositis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2011.02.005</link>
<description><![CDATA[Objective: To discuss the application value of fat suppression techniques in the MRI diagnosis of polymyositis and dermatomyositis. Materials and Methods: The MRI appearances of the bilateral thighs in 46 patients  with polymyositis or dermatomyositis were reviewed, using T1W, T2W and fat suppression sequences (short time inversion recovery or spectral presaturation with inversion recovery). The abilities of detecting lesions among T1W, T2W and fat suppression sequences were observed and compared. Results: (1) Abnormalities in the MRI appearances of bilateral thighs were found in 43 cases, which representing myositis in 33 cases, fasciitis in 40 cases , subcutaneous inﬂammation in 20 cases, marrow edema in 13 cases and myoatrophy in 5 cases. (2) All the abnormalities mentioned above were discovered in fat suppression sequences except myoatrophy. There were 12 cases of subcutaneous inﬂammation, and 5 cases of marrow edema to be found on T1W, however, no cases of myositis or fasciitis were displayed obviously. There were 10 cases of myositis and 5 cases of myoatrophy to be found, on T2W ,however, fasciitis, inﬂammation in subcutaneous connective tissues and marrow edema were failed to be displayed. (3) Twelve cases with subcutaneous inﬂammation and 5 cases with marrow edema were observed on T1W, 10 cases with myositis observed in T2W, were all at the acute or subacute stage at that time. Five cases with myoatrophy observed in both T1W and T2W were all at the chronic stage. Three cases with slight myositise and 10 cases with slight fasciitis were observed only in the fat suppression sequences among the patients at the chronic stage, all of which were failed to be observed in T1W and T2W. Conclusion  The application of MR fat suppression techniques can help to increase the detection of inﬂammatory lesions in soft tissues obviously . The fat suppression sequences are prefered when proceeding the MRI exam for polymyositis and dermatomyositis.]]></description>
<pubDate>Sun,20 Feb 2011 00:00:00  GMT</pubDate>
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<title><![CDATA[Wrist MR Imaging examination in the diagnosis of rheumatoid arthritis application]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2011.02.006</link>
<description><![CDATA[Objective: To investigate MRI imaging of different sequences in the diagnosis of rheumatoid arthritis wrist in the application. Materials and Methods: Forty-five patients with rheumatoid arthritis in different series line of wrist MRI, observation of synovial thickening, soft tissue swelling, joint effusion, bone marrow edema, bone destruction, tendinitis and tenosynovitis display case. Results: T1ﬂ3D water and T2me-3D sequence showed the highest positive rate of abnormal signs, PDWI fat-suppression, T2WI, T1WI sequences shows signs of positive rate of abnormal second, T1water sequence of the lowest positive rate of abnormal signs. Observation of different sequences in synovial thickening, joint effusion, bone marrow edema and bone destruction of significant differences, P values were less than 0.05. Conclusion: T1fl3D water, T2me-3D and other lesions in the display sequence are obviously higher than PDWI fat-suppressed, T1WI, FS-T2WI sequence, conventional MRI can be used as supplementary rheumatoid arthritis.]]></description>
<pubDate>Sun,20 Feb 2011 00:00:00  GMT</pubDate>
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<title><![CDATA[The hemispheric asymmetry study of brain function patterns in resting-state based on regional homogeneity]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2011.02.007</link>
<description><![CDATA[Objective: A regional homogeneity approach was applied to investigate the hemispheric asymmetries of regional function patterns. Materials and Methods: We recorded continuous fMRI data for six minutes from 21 undergraduates at resting-state.  Results: The right hemisphere showed significantly greater regional coordination strength than the right hemisphere in inferior frontal gyrus and inferior parietal lobule. In contrast, the left hemisphere was stronger than the right in superior temporal gyrus and cuneus. Conclusion: It is not a consistent hemispheric asymmetry in brain function patterns. Most of right hemisphere areas have higher regional coordination than the left to processing cognitive function, but the lower at occipital areas.]]></description>
<pubDate>Sun,20 Feb 2011 00:00:00  GMT</pubDate>
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<title><![CDATA[Observation of the relation between brain activity and de qi sensation with manual acupuncture at LI4 (Hegu)]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2011.02.008</link>
<description><![CDATA[Objective: To  discuss the relation between brain activity and de qi sensation with manual acupuncture. Materials and Methods: Manual acupuncture and superﬁcial tactile stimulations were successively  performed on 13 right handed healthy volunteers. Brain mappings were obtained with BOLD-based fMRI technique, and the brain regions activated during two stimulations were analyzed. Results: During manual acupuncture, all volunteers developed different de qi sensation, and the brain activity was individual different correspondingly. The activity of anterior frontal region, thalamus, Corpus striatum, Posterior cingulate cortex, and insula induced by acupuncture at acupoint LI4 (Hegu) had the trend of increasing with acupuncture intensities. Conclusion: There are some relationship between acupuncture intensities (de qi sensation) and brain activity evoked by acupuncture.]]></description>
<pubDate>Sun,20 Feb 2011 00:00:00  GMT</pubDate>
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<title><![CDATA[Application of magnetic resonance diffusion tensor imaging and fiber tractography to evaluate the value of diagnostic classification of cerebral gliomas]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2011.02.009</link>
<description><![CDATA[Objective: To evaluate the brain gliomas by the combination of diffusion tensor imaging (DTI) and diffusion tensor tractography (DTT), and to discuss its value in cerebral gliomas diagnostic classiﬁcation. Materials and Methods: Conventional MRI and DTI were performed in 25 patients with histological confirmed as gliomas which conclude 9 low-grade gliomas (WHO grade I-II) , 16 high-grade gliomas (WHO grade Ⅲ-Ⅳ). The values of FA and MD were calculated in the patients’ tumor center. The clinical benefit of DTT in display the brain white matter fiber was evaluated. Results: There was significant difference of FA values in the solid part of tumors between low-grad gliomas and high-grade gliomas (P < 0.05). The MD values in tumors center were different, but no statistical signiﬁcance (P > 0.05). On the DTT map, 7 of 9 low grade gliomas showed fiber bundle deviation, 2 of 9 low grade gliomas show partly interruption; 15 high grade gliomas patients’ ﬁber bundle were deviated, 14 of 15 high grade gliomas patients’ ﬁber were obviously destructed. But mainly appear as ﬁber deviation in 1 gliomas patient. Conclusion: Combination of DTI and DTT could be helpful in judging the degree of the tumor and accurately show the relationship of tumor and surrounding white matter ﬁber clearly, and provide more information of differential diagnosis. It is great value in surgical plan for patients with cerebral gliomas.]]></description>
<pubDate>Sun,20 Feb 2011 00:00:00  GMT</pubDate>
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<title><![CDATA[Diagnostic value of MR angiography in aortic dissection]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2011.02.010</link>
<description><![CDATA[Objective: To evaluate the value of magnetic resonance angiography (MRA) in diagnosing aortic dissection. Materials and Methods: We retrospectively analyzed MRA ﬁndings of 73 aortic dissection (AD) patients. Express and RF-FAST were used in the MR examination.   The results were compared with the ﬁndings of surgery or DSA.Results: Seventy-three AD patients including DeBakey type Ⅰ24 cases, DeBakey type Ⅱ 6 cases, DeBakey type Ⅲ 43 cases. Both the sensitivity and the speciﬁcity of the presence and the differentiation of aortic dissection were 100%. The sensitivity of the localization of intimal tears was 94.74%, but the specificity was 100%. The sensitivity of the involvement of arch branches was 91.49%, but the speciﬁcity was 92.31%. Conclusion: The aortic dissection can be diagnosed by MRA accurately and non- invasive. MRA can provide more useful information to clinical treatment.]]></description>
<pubDate>Sun,20 Feb 2011 00:00:00  GMT</pubDate>
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<title><![CDATA[Artery supply of breast cancer  by using VIBRANT dynamic contrast enhanced MR imaging]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2011.02.011</link>
<description><![CDATA[Objective: To investigate the value of dynamic contrast enhanced MR subtraction imaging in evaluation of the blood supply of breast cancer. Materials and Methods: The VIBRANT (volume imaging for breast assessment) dynamic contrast enhanced MR examination were obtained in sixty-seven patients with breast cancer, and its processed subtraction image was made to evaluate the interal and lateral thoracic artery and their branches and relationship between vessel and lesion. The showed-vascular MRI data on both normal breast and abnormal breast with lesion were statistically analyzed. Results: On normal and abnormal breast subtraction MR image, the first grade (I) branch of the interal and lateral thoracic artery and intercostal artery was no signiﬁcant difference (P > 0.05) and the second garde (II) the interal and lateral thoracic artery was signiﬁcant difference (P < 0.05). Conclusion: Dynamic contrast enhanced MR and its processed subtraction image can display blood  supply of breast cancer well.]]></description>
<pubDate>Sun,20 Feb 2011 00:00:00  GMT</pubDate>
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<title><![CDATA[MR imaging in orbital tumors and simulating lesions]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2011.02.012</link>
<description><![CDATA[The histologic types of orbital tumors and tumor-like lesions are diverse. The MR imaging could provide rich information about size, location or histologic characteristic, so has high specificity and sensitivity. In order to improve the diagnostic ability further, this paper summarized the key points of scanning parameters and the predominant features of some tumors and tumor-like diseases which frequently seen in clinical practice.]]></description>
<pubDate>Sun,20 Feb 2011 00:00:00  GMT</pubDate>
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<title><![CDATA[Advance in MR imaging for cerebral oligodendroglial tumor]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2011.02.013</link>
<description><![CDATA[Brain oligodendroglia tumor is the second most common glioma in central nervous system which has distinct molecular biologic and radiologic characteristic. MR spectroscopy, perfusion-weighted imaging, diffusion weighted imaging and susceptibility-weighted imaging, could reflect tumorous metabolism, hemodynamics and cellularity information and is superior to conventional MR imaging in preoperative diagnosis, classification and postoperative prognostic evaluation for brain glioma. In addition, the MRI characteristic of oligodendroglial tumor is associated with its biological features, that is to say MRI could reveal the tumorous gene type,  In this article, we review the MR imaging for brain oligodendrogilal tumor, hoping to improve the preoperative diagnostic and grade level of brain oligodendroglial tumor.]]></description>
<pubDate>Sun,20 Feb 2011 00:00:00  GMT</pubDate>
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<title><![CDATA[Latest technology on articular cartilage MR imaging: MapIt]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2011.02.014</link>
<description><![CDATA[The early detection of articular cartilage lesion is a difficult task. Now, MapIt shows great potential in diagnosis and therapy follow-up of cartilage damage by visualizing the change in biochemical components and collagen orientation etc. The purpose of this paper is to introduce the technique.]]></description>
<pubDate>Sun,20 Feb 2011 00:00:00  GMT</pubDate>
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