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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=201204</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
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<title><![CDATA[Attention shall be paid to the study and application of MR imaging on musculoskeletal system]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.04.001</link>
<description><![CDATA[There are much advances in MR imaging technology, information of structures and tissues obtained from the imaging (such as from macro-morphology and structure to the cellular and sub-cellular level, or even to the molecular level),and clinical applications in the field of musculoskeletal MR imaging. The new technologies such as MR diffusion imaging, perfusion, MR spectroscopy, T1ρ and T2 mapping, dynamic enhancement, arthrography, and so on, would be provided new methods for the study and applications in the field of musculoskeletal system.]]></description>
<pubDate>Fri,20 Apr 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[3.0 T MRI T2-mapping evaluates knee cartilage degeneration]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.04.002</link>
<description><![CDATA[Objective:  To explore the MRI value in diagnosing articular cartilage degeneration of knee joint by comparing MRI T2 value, T2-mapping appearances of tibial plateau cartilage degeneration with the corresponding pathological results. Materials and Methods: Eighteen of thirty-one knee joints undergone whole knee arthroplasty were chosen for MRI T2-mapping (T2 relaxation time) imaging. Ninety-eight cartilage subregions (specimens) were conﬁrmed  pathologically by a standard of Mankin’s pathological grade,  The different degrees of histological degenerated cartilage were divided into five groups basing on Mankin's grading standard. All the T2 values were inputted the database and variance comparisons between groups were tested by One-Way ANOVA and LSD test to evaluate the ability of T2 value and T2-mapping artiﬁcial color image on displaying cartilage degeneration. Results: No statistical difference of T2 value was found between normal group [(32.28+ 4.15) ms] and grade Ⅱ [(34.42+5.76) ms] group, grade Ⅰ [(37.72+4.83) ms] and grade Ⅱ, grade Ⅲ [(41.63+6.10) ms] and grade Ⅳ [(45.98+7.32) ms] (P ＞0.05) . Signiﬁcant difference of T2 value was found between grade I and grade Ⅲ or grade Ⅳ, grade Ⅱ and grade Ⅲ or grade Ⅳ(P <0.05). Overall, T2 value could get increased signiﬁcantly resulted from the severity of cartilage degeneration and the T2 value of grade Ⅱ group was slightly lower than that of grade I, but there was no statistical difference between grade Ⅱ group and normal group or grade I (P ＞0.05). The signal change on T2 -mapping artiﬁcial color image could sensitively display cartilage degeneration but hardly describe the degree of degeneration of cartilage. Conclusions: The T2 value of the articular cartilage could increase signiﬁcantly with cartilage deterioration, which was highly related to the degree of cartilage degeneration and could be considered as a sensitive method to detect early cartilage degeneration.]]></description>
<pubDate>Fri,20 Apr 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[Tear of the antero-inferior shoulder capsule: evaluation with shoulder MR arthrography]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.04.003</link>
<description><![CDATA[Objective:  To evaluate the efficacy of shoulder MR arthrography in identification of the antero-inferior capsular tear and to summary its imaging manifestation. Materials and Methods:  A retrospective study was undertaken in 183 cases of shoulder instability confirmed by subsequent shoulder arthroscopy. Two radiologists analyzed all shoulder MR arthrograms independently, and imagine ﬁndings were compared with those of arthroscopy. Sensitivities and speciﬁcities were calculated. k value was calculated to quantify the level of interobserver agreement. Results:   Antero-inferior capsular tear were arthroscopically diagnosed in 28 (15.3%) of the 183 patients. Sensitivities and specificities of MR arthrographic detection of capsular tear were 57.1％—67.9％ and 96.7％—98.7％, respectively. At inter-observer comparison, agreement was good (K =0.698). MR arthrographic ﬁndings of antero-inferior capsular tear were discontinuity of the antero-inferior capsule (14/28), discontinuity of the anterior band of the inferior glenohumeral ligaments (5/28), laxity of the anterior capsular (6/28), and normal appearance of the capsule (3/28). Conclusion:  Disruption of the antero-inferior capsule and the anterior band of the inferior glenohumeral ligament are the main MR arthrographic manifestations of the antero-inferior capsular tear, and these signs have moderate sensitivity and high speciﬁcity.]]></description>
<pubDate>Fri,20 Apr 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[A Meta analysis on apparent diffusion coefficient used to differentiate benign from malignant soft tissue tumors]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.04.004</link>
<description><![CDATA[Objective:  To evaluate diagnostic value of mean apparent diffusion coefficient (ADC)values depending on b value ranges on differentiating benign from malignant soft tissue tumors in diffusion-weighted imaging. Methods: A comprehensive search was conducted to screen out mean ADC values and SD values from included studies. Meta -analysis was applied with Medcalc software for calculation of  standardized mean differences (SMD) of mean ADC values and 95% conﬁdence intervals (CI ) for SMD. Results: Ten studies were included in this Meta -analysis. B value ranged from 0 to 400 s/mm2 with a SMD ( 95% CI ) of 0.86 (－0.46—2.19), 500 to 700 s/mm2 with that of 1.50 (0.79—2.21), and 800 to 1000 s/mm2 with that of 0.93 (0.40—1.46). There was no statistically signiﬁcant difference in mean ADC values between benign and malignant soft tissue tumors when b value ranged from  0 to 400 s/mm2, and there were statistically signiﬁcant differences when b value ranged from 500 to 700 s/mm2 and 800 to 1000 s/mm2, but SMD of the former exceeded that of the latter. Conclusions: ADC values in diffusion-weighted MRI maybe have more potential value in differentiating benign soft-tissue tumors from malignant ones when b value ranged from 500 to 700 s/mm2.]]></description>
<pubDate>Fri,20 Apr 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[The application of MRI in the diagnosis and monitoring of treatment response in patients with polymyositis and dermatomyositis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.04.005</link>
<description><![CDATA[Objective:  To investigate the magnetic resonance imaging (MRI) ﬁndings of muscles and to assess the utility of MRI in the diagnosis and monitoring of treatment response in patients with polymyositis (PM) and dermatomyositis (DM). Materials and Methods: MR imagings were analysed retrospectively in 15 patients with PM and 21 patients with DM. MRI of thighs was performed for diagnostic purpose in all patients and during treatment the second MRI was underwent in  8 patients to monitor therapeutical effect. Fast spin echo T1-weighted, T2-weighted and short tau inversion recovery (STIR) sequences of bilateral thighs were obtained in all patients.  Results: Among 36 patients with PM/DM, changes were detected in  31 patients on MRI. The ﬁndings included muscule edema in 30 patients, inﬂammation in fascia in 7 patients, edema in the subcutaneous tissue in 14, muscule distrophy followed fatty infiltration or replacement in 5. Inflammation absorbed partially or disappeared in all 8 patients who underwent MRI after treatment. Conclusion: MRI is a non-invasive, sensitive technique that is a powerful tool for diagnosis and monitoring of treatment response. Edema in muscle and subcutaneous tissue is the most common ﬁndings on MRI.]]></description>
<pubDate>Fri,20 Apr 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[MRI in abnormal knees of juvenile idiopathic arthritis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.04.006</link>
<description><![CDATA[Objective:  To evaluate MRI features in abnormal knees of juvenile idiopathic arthritis (JIA). Materials and Methods: Twenty-four patients diagnosed JIA clinically with knees pain and swelling were taken X-ray and MR images of knees. X-ray and MRI features of knees were read respectively. Thicknesses of suprapatellar bursa synovium and suprapatellar pouch ﬂuid volume were measured. Person’s correlations between the suprapatellar bursa synovial thickness, ﬂuid volume and the clinical data were analyzed respectively. Results: All 24 X-ray of knees were found swelling, but no bony erosion. MRI of 24 cases showed the suprapatellar bursa effusion [(13.19±5.44) ml] in all, and accompany cartilage articular surface injury in 4, anterior cruciate ligament injury in 2, popliteal lymph nodes enlargement in 4, bone marrow edema in 5. Suprapatellar bursa synovium thickening [(3.21±1.27) mm], pannus formation were showed and enhanced significantly in all 17 cases of MRI-enhancement. The correlation (r =0.837, P ＜0.05) were signaﬁcant between synovial thickness and suprapatellar pouch ﬂuid volume. RF was (4.32±2,92) U/ml, ESR was (53.38±19.34) mm/h, CRP was (60.96±45.52) mg/L in all 24 cases. Little correlations (r =0.684, 0.507, P ＜0.05) were found between suprapatellar bursa synovial thickness and RF, ESR. No correlations (r =0.213, P ＞0.05) were found between suprapatellar bursa synovial thickness and CRP. Large correlations (r =0.837, P ＜0.05) were found between suprapatellar pouch fluid volume and RF. Little correlations (r =0.452,  P ＜0.05) were found between suprapatellar pouch ﬂuid volume and ESR. No correlations (r =0.268, P ＞0.05) were found between suprapatellar pouch ﬂuid volume and CRP. Conclusion: MRI could show suprapatellar bursa synovial thickness, suprapatellar bursa effusion, bone marrow edema of JIA, which could provide imaging evidence in diagnosis of early active JIA.]]></description>
<pubDate>Fri,20 Apr 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[A phase contrast magnetic resonance imaging study ofhemodynamics of pulmonary artery in patients with repairedtetralogy of Fallot at 3.0 tesla]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.04.007</link>
<description><![CDATA[Objective:  To compare pulmonary reguigitation (PR) measured by  3.0 T PC-MRI with data provided by echocardiography and evaluate the relationship between PR and different operation method. Materials and methods:  We studied 42 patients (16 female, 26 male, mean age 18.7 years, range 10—51 years) with surgical correction of TOF who performed cardiac magnetic resonance imaging and echocardiography within a month. The pulmonary regurgitation fraction (PRF) and average negative flow (ANF) were calculated during one cardiac cycle. Spearman rank correlation analysis was performed for comparison of measurement results. For comparison PRF and ANF between RVOT patch and transannular patch, Mann-Whtiney U test was employed. Results:  By echocardiography criteria,mild PR was present in 10 cases, moderate PR in 32 cases.while PC-MRI showed mild PR in 10 cases(23.8%), moderete PR in 8 cases(19.0%) and severe PR in 24 cases (57.1%) respectively. The different categories (mild,moderate and severe) of PR measured by PC-MRI had a positive liner correlation with the results measured by echocardiography (rs =0.606, P <0.001). Patients with a transannular patch had a signiﬁcantly higher PRF and ANF than patients with RVOT patch (U =52.000, P =0.001, U =55.000, P =0.002). Conclusion:  The PRF measured by 3.0 T PC-MRI has well correlation with that measured by echocardiography, and PC-MRI can provide adequate quantitative information to estimate PRF. 3.0 T PC-MRI can accurately reﬂect the difference of pulmonary blood ﬂow causing by RVOT patch and transannular patch.]]></description>
<pubDate>Fri,20 Apr 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[The application of reduced FOV MR imaging in spinaldiseases]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.04.008</link>
<description><![CDATA[Objective: To discuss the usefulness of reduced FOV diffusion weighted
imaging in spinal disease. Materials and Methods: Fifty-three objects (20 normal,
33 with spinal lesions)were scanned with rFOV-DWI and routine DWI, and the SNR
and image distortion ratio about this two DWI sequences were evaluated by two senior
radiologists. Results: The SNR and image distortion ratio of rFOV-DWI are better
than routine DWI. Conclusion: The rFOV-DWI can provides higher SNR and less
distortion compared with conventional DWI. It can be easily performed, and is helpful
in the diagnosis of spinal disease.]]></description>
<pubDate>Fri,20 Apr 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[Dynamic contrst-enhanced magnetic resonance angiography in vascular diseases of abdomen and lower extremities: technique and clinical application]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.04.009</link>
<description><![CDATA[Objective:  To explore the method of 3D CE-MRA in demonstrating arterial diseases from abdomen to lower extremity. Materials and Methods: Thirty patients underwent 3D CE-MRA at SIEMENS ESSENZA 1.5 T system with 3D-FLASH sequences and parallel acquisition technique using the body coil. All images were reconstructed with maximum intensity projection (MIP). Results: 3D CE-MRA could clearly show the vascular diseases from the abdomen aorta furcation to the foot artery. Of the 30 patients, 20 were found with arteriosclerosis obliterans, 2 with angeiomas, 1 with artery-vein malformation (AVM), 1 with arteriovenous fistula, 1 with variant artery abdomen to lower extremity arteries, 2 with iliac vein compression syndrome imaging. The CE-MRA images were normal in 3 patients.  Conclusion: 3D CE-MRA is of great value for macroangiopathy detection, which can show the vascular illness, the relationship between illness and vessels, or relationship between vessels and peripheral tissues.]]></description>
<pubDate>Fri,20 Apr 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[Pediatric imaging in daily routine with MAGNETOM ESSENZA]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.04.010</link>
<description><![CDATA[With the rapid development of MRI modality, pediatric imaging has obtained great progress. To answer the requirement of pediatric scanning better, a very design in hardware and software should be applied in the MRI modality to cover the particularity of children. The MAGNETOM ESSENZA 1.5 T MR scanner launched by Siemens could meet the requirement of SNR and routine/advanced applications in pediatric imaging well, which provides more powerful reference in pediatric diagnoses and evaluation. This pictorial essay shares experience in pediatric imaging and illustrates the applicability and advantage of MAGNETOM ESSENZA 1.5 T scanner in pediatric imaging.]]></description>
<pubDate>Fri,20 Apr 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[Radiographic progression of joint system in Radiological Society of North America 2011]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.04.011</link>
<description><![CDATA[The Radiological Society of North America (RSNA) represents one ofthe highly prestigious medical societies. Four hundred and fifty-seven studies ofmusculoskeletal system were published in RSNA 2011, in which 118 were about jointimaging. The exhibits ,posters and studies were mainly about hip, knee, ankle andshoulder joints etc. Magnetic resonance imaging is the predominant mode of imaging technology. Diffusion weighted imaging, diffusion tensor imaging, T2 mapping, ultrashort TE, dynamic contrast-enhanced MRI and MR arthrography were used for detecting the qualitative and quantitative of articular cartilage changes.Studies in extremities joints and microstructures were rare, which were mainly comparative studies between MRI and MR arthrography. This article is a review of the radiographic progression of joint system in RSNA 2011.]]></description>
<pubDate>Fri,20 Apr 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[The mechanisms of iron abnormal deposition and research progressive in the brains of patients with multiple sclerosis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.04.012</link>
<description><![CDATA[Histology has showed iron abnormal deposition in the brains of patients with multiple sclerosis (MS) and experimental autoimmune encephalomyelitis (EAE) animals. Iron in the brain can be detected and measured accurately using non-invasive magnetic resonance imaging (MRI). The probable pathogenesis and the related to experimental research on the brain iron abnormal deposition in MS patients and animal experiments are reviewed.]]></description>
<pubDate>Fri,20 Apr 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[The research status of non-enhanced MR angiography in peripheral arteries]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.04.013</link>
<description><![CDATA[The development of non-contrast-enhanced MR angiography (NCE-MRA) has great clinical significance for imaging arteries in patients with renal insufficiency because of the concerns regarding nephrogenic systemic fibrosis and overcoming the limitations of contrast-enhanced MRA in imaging coverage or spatial resolution and venous contamination. Some newly developed peripheral NCE-MRA methods were reviewed, focused on the elimination of veins and the background of soft tissue, the improvement of arterial signal-to-noise ratio and image quality, and the clinical potential.]]></description>
<pubDate>Fri,20 Apr 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[MR imaging of benign soft-tissue tumors of the extremities]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.04.014</link>
<description><![CDATA[The incidence of soft-tissue tumors located in the extremities is high, and it is important to comfirm the anatomic localization and tissue characterization. Magnetic resonance (MR) is an essential and noninvasive tool in the evaluation of soft-tissue tumors. T1-weighted, T2-weighted, gadolinium-enhanced and other sequences are performed. The purpose of MR imaging is to depict tumors or tumorlike lesions perfectly, including proper FOV (field of view), high SNR (signal-noise ratio), and the features of masses.]]></description>
<pubDate>Fri,20 Apr 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[MRI diagnosis of common soft tissue masses in the foot]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.04.015</link>
<description><![CDATA[Because of its superior soft-tissue contrast resolution and direct multiphanar, multipramater imaging capability, magnetic resonance imaging has become the modality of choice for evaluating soft-tissue diseases. The common soft tissue masses of the foot have their own characteristics on MRI signal intensity, morphology, or location. Recognizing these features and combining them with clinical findings in the comprehensive analysis is helpful in reaching correct diagnoses for these lesions.]]></description>
<pubDate>Fri,20 Apr 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[MR examination and diagnosis of acetabular labral injures]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.04.016</link>
<description><![CDATA[Acetabular labral injures are a common cause of hip pain. For the purpose of improving the diagnostic ability for acetabular labral injures, this paper summarized the routine MR sequences of acetabular labrum, analysed the locations and signal characteristics of acetabular labral injures.]]></description>
<pubDate>Fri,20 Apr 2012 00:00:00  GMT</pubDate>
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