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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=201202</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
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<title><![CDATA[Analysis of DCE-MRI for diagnosis and neoadjuvant chemotherapy monitoring of breast cancer]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.02.002</link>
<description><![CDATA[With research being conducted over 2 decades, breast MRI has become an established clinical imaging modality for management of breast diseases. This review paper summarizes the analysis of breast MRI acquired using the dynamic-contrast enhanced (DCE) imaging protocol as well as its clinical applications. The measurement of DCE kinetics, the qualitative analysis to measure heuristic parameters, and the quantitative analysis to obtain pharmacokinetic parameters such as Ktrans and kep are described. The current debate about whether it is necessary to measure the arterial input function from each individual patient is discussed. The DCE-MRI analysis tools offered in several widely used commercial software are described. Then the clinical application of DCE-MRI for diagnosis and therapy monitoring of breast cancer are described. In general, for diagnosis of breast cancer, the hot spot approach to characterize tissues with the most aggressive pathology should be taken; but for therapy response monitoring, the whole tumor should be analyzed. Lastly, the application of breast MRI in high-risk screening and vey recently, risk management, is discussed. It is highly anticipated that breast MRI will continue to play a very important role in management and care of breast diseases for women in the entire clinical spectrum from risk management, screening, diagnosis, therapy, and surveillance.]]></description>
<pubDate>Mon,20 Feb 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[Breast MR imaging for distinguishing well-circumscribed breast malignancies from benign lesions]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.02.003</link>
<description><![CDATA[Some breast malignancies manifested as well-circumscribed masses that are similar to benign lesions, it is not easy to differentiate them from benign lesions by conventional imaging modalities such as mammography and ultrasonography. However, it has been proved that MR imaging of the breast can fill many of clinical information gaps that are inadequately evaluated by mammography and ultrasonography due to MRI’s inherently high soft-tissue contrast. Therefore, breast MR imaging can play a substantial role in distinguishing between well-circumscribed benign and malignant breast lesions, especially in cases that are diffcult to diagnose by using conventional imaging.]]></description>
<pubDate>Mon,20 Feb 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[Imaging study on the ductal carcinoma in situ of the breast]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.02.004</link>
<description><![CDATA[The pathology and the imaging findings of ductal carcinoma in situ (DCIS)of the breast, including the manifestations in mammography, ultasonography, and magnetic resonance imaging (MRI), were described. The interventional procedures including localization of the microcalcifications with imaging guidance and needle core biopsy with stereotactic localization were also introduced in this paper. The author emphasized that the detection and diagnosis of DCIS needed a comprehensive imaging approach in the clinical setting.]]></description>
<pubDate>Mon,20 Feb 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[Designation and optimization of breast MRI examinations in clinical settings]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.02.005</link>
<description><![CDATA[Breast MRI has been widely applied in the diagnosis as well as evaluation of breast cancer. Performing high quality breast MRI examination is essential to accuracy and reliability of clinical usage of the modality. This article summarized key points that determine quality of  breast MRI in the processes of performing examination, including schedule, patient preparation, protocol design, image acquisition, interpretation and reporting, provided advice and methods to optimize, in order to be instructive to perform good quality breast MRI in clinical settings.]]></description>
<pubDate>Mon,20 Feb 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[Estimation of DWI and DCE-MRI in the small mass lesions of the breast on MR imaging at 3.0 T]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.02.006</link>
<description><![CDATA[Objective:  To assess the DWI and DCE-MRI in small mass lesions of the breast on MR imaging at 3.0 T. Materials and Methods: A retrospective study was conducted on 62 patients who underwent DWI and DCE-MRI as part of the clinical breast MRI protocol. Patients included in the study had breast lesions with a maximum length of 10mm as the long axis of the lesion on MR imaging. Results: The combined MRI protocol thus exhibited a sensitivity of 100% and a specificity of 75.9%. The ADC values were signiﬁcantly lower in malignant lesions compared to their benign counterparts. ROC analysis revealed that the threshold value for ADC to distinguish between benign and malignant lesions is 1.11×10-3 mm2/s. Kinetic curve analyses revealed that type II and type III curves should be considered indicative of malignancy. Conclusions: The study demonstrates that DWI and DCE-MRI protocol is easy to carry out and assess. ADC values obtained from DWI can be used to distinguish between benign and malignant breast tumours. This MRI protocol has good sensitivity and specificity. Moreover kinetic curves obtained by DCE-MRI, provide a fairly accurate differentiation between benign and malignant tumours.]]></description>
<pubDate>Mon,20 Feb 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[Comparative study of dynamic MRI, mammography, and ultrasonic in the diagnosis of breast lesions]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.02.007</link>
<description><![CDATA[Objective:  To evaluate the different diagnostic value in breast lesions, especially breast cancer, by dynamic contrast enhanced MR imaging, mammography, and ultrasonic. Materials and Methods: Thirty patients with 61 breast lesions were studied by dynamic contrast MRI, mammography, and ultrasonic independently before operation. The diagnostic sensitivity and specificity of each imaging modality were calculated independently and compared among each modality. Results: The diagnostic sensitivity and specificity of ultrasound, mammography and contrast enhanced MR imaging were 41.2 %, 84.6 %; 35.3 %, 87.2 %; and 94.1 %, 94.9 %, respectively. There was signiﬁcant difference on diagnostic accuracy in MR and mammography (χ 2=32.378, P =0.000). Ultrasound and mammography showed no diagnostic difference (χ 2=0.569, P =0.451). Conclusion: Dynamic contrast enhanced MRI is a more effective diagnostic  method in the diagnosis of breast diseases than mammography and ultrasonic.]]></description>
<pubDate>Mon,20 Feb 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[Discussions about 1 718 cases of cerebral hemorrhage imaging findings]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.02.008</link>
<description><![CDATA[Objective:  Discuss hematoma is through the surrounding vessels into the ventricle, brain crack between the brain and the issues of the pool system by summarizing 1 718 patients with hypertensive intracerebral hemorrhage.  Materials and Methods: Clear up patients with hypertensive intracerebral hemorrhage (1 078 men, 640 women; age ranging from 22 years to 87 years) who were diagnosed and treated in our hospital from August 2008 to December 2011. Results: 1 210 cases were supratentorial intracerebral hemorrhage; 508 cases were cerebellum and brain stem bleeding; about 35% of the hematoma around the ring structure, and the annulation was relate to the absorption of haematomas speed and prognosis. We also observed some cerebral hemorrhage signs that were not payed attention to. Conclusion: High blood pressure cerebral hemorrhage can be blood into the ventricle and other sites through the surrounding vessels; the annulation around the hematoma is a biological self-limited hemavior.]]></description>
<pubDate>Mon,20 Feb 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[Application of magnetic resonance diffusion tensor imaging in intracranial tumor]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.02.009</link>
<description><![CDATA[Objective:  To investigate the clinical application of fractional anisotropy (FA) and apparent diffusion coefﬁcient (ADC) in MR diffusion tensor imaging (DTI) for intracranial tumor. Materials and methods: Conventional MRI and DTI were performed in 39 patients with intracranial tumor (12 cases of glioma, 10 cases of meningioma, 9 cases of Schwannoma, 8 cases of lymphoma) prior to tumor excision. All the patients have been confirmed by pathology. ADC and FA were measured and compared between different types of tumor. The reconstruction of diffusion tensor tracking (DTT) in lesions and normal regions were obtained. Results: The average values of FA and ADC in glioma, meningioma, lymphoma, Schwannoma were FA1: 0.318±0.0036, FA2: 0.45±0.052, FA3: 0.304±0.012, FA4: 0.0362±0.071; ADC1: 1.233±0.204, ADC2: 1.061±0.039, ADC3: 1.014±0.108, ADC4: 1.469±0.06. Meningioma shows the highest FA value, and Schwannoma shows the highest ADC value, while both values of FA and ADC in lymphoma were the lowest. The result shows significant statistical differences (α =0.05). Conclusion: FA and ADC value shows signiﬁcant differences between different tumors. DTT is better in displaying displacement, invasion and damage of white matter tracks. It is valuable for making diagnosis and differential diagnosis, and providing evidence for determining surgical plan and postoperative follow up.]]></description>
<pubDate>Mon,20 Feb 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[The Hirayama disease’s MRI features under the conventional position and flexion position]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.02.010</link>
<description><![CDATA[Objective: To understand MRI characteristics of hirayama disease’s (HD). Materials and Methods: Five patients with HD were scanned by MR on the conventional and the flexion position. The findings were analyzed. Results: On the conventional position, 5 cases presented slight atrophy of lower cervical cord, 1 case showed upper thoracic cord involvement. On the ﬂexion position, the lower cervical cords showed antedisplacement. Widened spinal epidural space within abnormal strip shadow in all the cases. Conclusion: The conventional and the ﬂexion position of the neck condition on MRI has the characteristics.]]></description>
<pubDate>Mon,20 Feb 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[Discussion of EPI-fMRI artifacts based on the cases: Causes and solutions]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.02.011</link>
<description><![CDATA[Functional magnetic resonance imaging (fMRI) based on echo planar image (EPI) sequence is the major tool in basic and clinical brain function research. However, compared with the routine imaging sequence, EPI is much easier to suffer from the noises and artifacts, which affects the quality of fMRI data. So how to detect and resolve the artifacts and stability problem of EPI has become a core issue of fMRI quality control for research. In this paper, five types of fMRI artifacts are summarized and reviewed, which often occur in the application of fMRI based on authors’ 5 years experience of fMRI quality control. They are the Nyquist ghost, geometric distortion, spike noise, RF noise and stability problems in the time course. The selected cases, found in fMRI quality control process, are adopted for each type of artifact for further analysis including its feature, major causes and trouble shooting guideline. We expect that these cases and their detailed analysis can be good references for the researchers and technicians to assure the quality of their fMRI data.]]></description>
<pubDate>Mon,20 Feb 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[Evaluation Methodology of MRI SNR]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.02.012</link>
<description><![CDATA[From technical perspective, this article introduces the evaluation methodology of MRI signal-to-noise ratio (SNR) based on National Electrical Manufacturers Association (NEMA) standard, Siemens’ evaluation methodology of MRI SNR and other standards. In addition, it figures out the advantage of Siemens’ evaluation methodology of MRI SNR in comparison with the evaluation methodology based on NEMA and other standards.]]></description>
<pubDate>Mon,20 Feb 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[Research progress on proton magnetic resonance spectroscopic imaging for monitoring response of neoadjuvant chemotherapy in breast cancer]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.02.013</link>
<description><![CDATA[MR multi-functional imaging techniques, such as MR perfusion weighted imaging, diffusion weighted imaging and spectroscopic imaging, have a important value in breast cancer diagnosis, differential diagnosis and monitoring therapeutic effect of neoadjuvant chemotherapy for breast cancer. This paper is devoted to reviewing the proton-magnetic resonance spectroscopic (1HMRS ) imaging techniques. The basic principle of 1HMRS, commonly used positioning technology and spectral line postprocessing are intruoduced essentially. Present status and progress of the application on 1HMRS in breast cancer diagnosis, differential diagnosis and monitoring therapeutic effect of neoadjuvant chemotherapy for breast cancer are introduced in detail.]]></description>
<pubDate>Mon,20 Feb 2012 00:00:00  GMT</pubDate>
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