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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=201305</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
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<title><![CDATA[The evaluation value of the MRA and PWI technology of the cerebral vascular disease in diabetics]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.05.001</link>
<description><![CDATA[Objective: To investigate value of the MRA and PWI technology of the cerebralvascular disease in diabetics. Materials and Methods: Retrospective analysis of our hospital clinically proven 70 patients with diabetes, patients underwent conventional MRI, MRA, and PWI scan. DSA results according to whether patients with cerebral vascular disease will be divided into normal and abnormal groups. By the abnormal group according to varying degrees of stenosis divided into stenosis and occlusion groups. Each group two MRA, PWI inspection results with DSA for comparison. And two PWI perfusion parameters were analyzed. Results: In normal patients MRA showed no abnormalities, and PWI shows five cases of abnormal perfusion. Patients with abnormal MRA and PWI accurate diagnosis of stenosis was 88.6%, 85.7%, occlusion group were 100% accuracy rate. PWI parameters between the two groups were shown: rCBF and rCBV was no signiﬁcant difference (P>0.05), rMTT and rTTP, the difference was statistically significant (P<0.05), and with the degree of stenosis increases, rMTT, rTTP in both increased. Conclusions: MRA and PWI imaging combined with conventional MRI, for improving diabetes diagnosis of cerebrovascular disease have a very important value, It should be to select the appropriate clinical treatment provides an important basis.]]></description>
<pubDate>Mon,20 May 2013 00:00:00  GMT</pubDate>
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<title><![CDATA[The value of diffusion tensor MR imaging in differentiating atypical meningioma from glioma]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.05.002</link>
<description><![CDATA[Objective: To observe the value of diffusion tensor MR imaging in differentiating atypical meningioma from glioma. Materials and Methods: Forty-five patients with pathologically proven brain tumor (17 atypical meningioma, 28 different grade gliomas) under went diffusion tensor MR imaging Mean fractional anisotropy (FA) and apparent diffusion coefficient (ADC) values were measured in the tumor parenchyma, peritumoral region and corresponding contralateral normal brain tissue. The FA and ADC in the tumor parenchyma, peritumoral region and corresponding contralateral normal brain tissue of atypical meningioma and glioma were analyzed by SPSS 19.0. The results were expressed as x±s and P<0.05 was regarded as statistically signiﬁcant differences. Results: There were many differences with FA in parenchyma, peritumoral region and corresponding contralateral normal brain tissue between atypical meningioma (0.23±0.05, 0.20±0.04, 0.28±0.04) from glioma (0.05±0.01, 0.14±0.03, 0.26±0.04). There were also many differences with ADC (×10-9mm2/s) in parenchyma, peritumoral region and corresponding contralateral normal brain tissue between atypical meningioma (0.82±0.13, 1.22±0.32, 0.73±0.10) from glioma (1.82±0.17,1.71±0.10, 0.70±0.06).  Conclusions: Measurement of tumor parenchyma and peritumoral region’s FA values and ADC values can identify atypical meningioma and glioma.]]></description>
<pubDate>Mon,20 May 2013 00:00:00  GMT</pubDate>
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<title><![CDATA[The comparative study of CT and MR enhancement images after induction chemotherapy of nasopharyngeal carcinoma]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.05.003</link>
<description><![CDATA[Objective: To study the medical imaging examination method for drawing the outline of the target areas after induction chemotherapy of nasopharyngeal carcinoma. Materials and Methods:  CT and MR enhancement images of  21 patients with nasopharyngeal carcinoma after induction chemotherapy were collected. The transverse images of MR T1WI enhancement, T2WI fat- suppression and CT enhancement (three kinds of images) were observed and analyzed by two experienced doctors. Result: The primary lesion is disappeared after induction chemotherapy in 2 cases. Primary tumor lesions were showed in 19 cases and a total of 131 sections. On the three kinds of images, the lesion showed clearly boundary in 117 sections (89.3%), 103 sections (78.6%) and 52 sections (39.7%) respectively. The lesion simultaneously displayed well-defined boundary on three kinds of images in 5 cases, These lesions of 5 cases showed obvious reinforcement on the contrast-enhanced CT images. The longus capitis was invaded in 10 cases on MR images, only 4 obviously enhancement cases on enhanced CT images. It is not signiﬁcant differences between CT images and MR images in displaying the invasion of basis cranii. Conclusions: MRI is superior to CT in showing the boundary of nasopharyngeal carcinoma and judging the invasion of longus capitis. We can directly draw the outline of the target areas on the CT images, when the enhancement of the lesion is obvious and the fringe is clear on enhanced-CT images, or the primary lesion is disappeared after induction chemotherapy, or the basis cranii is widely invaded.]]></description>
<pubDate>Mon,20 May 2013 00:00:00  GMT</pubDate>
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<title><![CDATA[The value of susceptibility weighted imaging in the diagnosis of cerebral micro-bleeding]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.05.004</link>
<description><![CDATA[Objective: To evaluate the detection ability of MR susceptibility weighted imaging (SWI) in the cerebral micro-bleedings (CMB) and recessive cerebral micro-bleedings (rCMB). Materials and Methods: Magnetic resonance images of 45 cases with cerebral micro-bleeding were retrospectively analyzed. The features including size and location of the cerebral micro-bleedings were observed, and the detection rate of MRI and SWI were compared. These sequences of magnetic resonance imaging (T1WI, T2WI, FLAIR, DWI) and SWI were carried out. SWI was the VEN-BOLD-HR gradient echo sequence. Results: Altogether, 197 CMBs were deceted with a total of 162 CMB lesions on MRI, 191 CMB lesions on SWI. The detection rate of SWI is 1.18 times of the routine sequences. There was statistic difference in showing cerebral micro-bleeding among those sequences(χ2=22.90, P<0.01). Conclusion: SWI has a higher value in the detection of CMB and rCMB than the routine sequences, and should  be one of the conventional sequences.]]></description>
<pubDate>Mon,20 May 2013 00:00:00  GMT</pubDate>
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<title><![CDATA[MRI diagnosis of posterior reversible encephalopathy syndrome]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.05.005</link>
<description><![CDATA[Objective: To investigate the MRI findings of posterior reversible encephalopathy syndrome (PRES). Materials and Methods: The MRI datas of  16 patients were analyzed retrospectively. 16 cases were examined by MRI, 5 with MRV examination at the same time, 11 with systematic treatment were reviewed by MRI. Results: Lesions were multiple, 16 cases of the MRI scan detected 73 lesions, Most of them were located in the subcortical white matter. The lesions showed slightly hypointensity on T1WI and slightly hyperintensity on T2WI. Most often affected parietal-occipital lobe (88.5%), followed by frontal lobe (61.3%), cerebellum (31.3%), temporal lobe (30.1%), basal ganglia (28.7%) and brain stem (17.3%). 1 with multiple focal hemorrhage in the brain. Except the focal hemorrhage, other lesions showed slightly high signal on DWI, most of the lesions showed high signal on ADC map, Only one lesion in corpus callosum revealed hypointensity on ADC map. There were no abnormally ﬁndings in 5 MRV examinations. After treatment, 11 MRI showed signiﬁcant lesion number decrease. Compared to the previous inspection [(1.036±0.186)× 10–3mm2/s], residual lesions’ ADC values [(0.937±0.086)×10–3mm2/s] were decreased, and closer to the ADC values of normal brain [(0.832±0.078) ×10–3mm2/s). Conclusions: The MRI imaging of PRES is characterized, DWI and MRV have great signiﬁcance for the diagnosis and differential diagnosis of PRES, and the follow up MRI scan of PRES after treatment has important value to the therapeutic effect.]]></description>
<pubDate>Mon,20 May 2013 00:00:00  GMT</pubDate>
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<title><![CDATA[The imaging features of synovial osteochondromatosis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.05.006</link>
<description><![CDATA[Objective: To evaluate the image ﬁndings of synovial osteochondromatosis and differential diagnosis. Materials and Methods: X-ray, CT and MRI ﬁndings in  15 cases with synovial osteochondromatosis were analyzed retrospectively. Results: 11 cases of 15 cases were proved by clinical and pathologically, 4 cases of 15 cases were proved by arthroendoscopy. X-ray, CT and MRI can ﬁnd small loose body, X-ray and CT can find high densidy calcification round and oval shape, large or small of small loose body. MRI can ﬁnd small cartilage nodular had hypointensity on T1WI, had a mixture of hypo-hypeintensity on T2WI. CT examination can be found hidden loose bodies, thickened synovium and intra-articular effusion MR can detect intra-articular not free of calciﬁcation cartilage tumor nodules, in addition to articular loose bodies can be seen, but also clearly indicated that cartilage synovial soft tissue changes and joint effusion. Conclusions: Loose body is the characteristic features in imaging.  X-ray diagnosing simple and high-speed, CT and MRI can ﬁnd more information.]]></description>
<pubDate>Mon,20 May 2013 00:00:00  GMT</pubDate>
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<title><![CDATA[Effect of alcohol on diffuse axonal injury in rats brainstem:DTI study]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.05.007</link>
<description><![CDATA[Objective: To assess the effects of alcohol on traumatic brain injury (TBI) by using diffusion tensor imaging (DTI) in rat brainstems following acute alcohol intoxication with diffuse axonal injury (DAI). Materials and Methods: 85 male rats, divided into control group (group N), acute alcohol poisoning group (group A), DAI Group (group T) and ethanol-plus-DAI group (group AT). The control group and the experimental group (made into animal model after 1 h, 3 h, 6 h, 12 h, 24 h) were examined by MRI, and the brainstem pathology. Results: After acute alcoholism with DAI, ADC values of the brainstem first decreased within 6 h after injury and then elevated. FA values began decline by 1 h, reaching a minimum at 24 h after trauma. FA values were lower in the ethanol-plus-DAI group (group AT) compared to the DAI group (group T) at 3 h and 6 h. The ADC value of the ethanol-plus-DAI group (group AT) is lower than the DAI group (group T) in 12 h, but it is higher after 24 h. Conclusions: Acute ethanol consumption affects severity after DAI by accelerating brain edema and axonal injury. DTI can sensitively to detect acute alcohol intoxication with TBI in brainstem edema and axonal, while the routin MRI cannot found.]]></description>
<pubDate>Mon,20 May 2013 00:00:00  GMT</pubDate>
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<title><![CDATA[Cardiac Dot Engine: makes cardiac MR scanning much easier]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.05.008</link>
<description><![CDATA[Comparing with head, spine and abdomen MR scanning, cardiac MRI is much less applied for clinical diagnosis, one of the important reasons of which is that cardiac MR scanning is more complicated, therefore, many MR technicians don’t know how to do the patient positioning or how to conduct the whole cardiac scanning process. Cardiac Dot Engine, latest developed by Siemens, provides the solution successfully and makes the cardiac MR scanning much easier.]]></description>
<pubDate>Mon,20 May 2013 00:00:00  GMT</pubDate>
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<title><![CDATA[fMRI: a brief review and outlook on the state-of-the-art methodology]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.05.010</link>
<description><![CDATA[Since the early 1990’s, functional Magnetic Resonance Imaging (fMRI) has seen explosive growth over the past two decades, and has become a dominant technique in modern neuroscience research. Recent technological advances, including those in imaging hardware, pulse sequences, experimental design, as well as analysis strategies, ensure that fMRI will see continued growth and expansion into even broader applications. In this report, we will briefly review the current state of MRI technological research, such as high-resolution imaging, connectome imaging, and multi-modal imaging. We will also briefly discuss a few possible future directions of fMRI, ranging from its applications in clinical to social sciences.]]></description>
<pubDate>Mon,20 May 2013 00:00:00  GMT</pubDate>
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<title><![CDATA[Mathematical design of a magnetic resonance imaging sequence based on bloch NMR flow equations and bessel functions]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.05.011</link>
<description><![CDATA[Bloch NMR equations are fundamental to all NMR/MRI computations, simulations and experiments. It has been very difficult to solve the Bloch NMR flow equations analytically without imposing specific adiabatic and non adiabatic conditions. General analytical solutions of the flow equations can easily provide additional information to understand the basic concept of NMR/MRI without the usual exponential functions. The goal of this report is to present analytical solutions to the time independent NMR flow equation using the Bessel functions and properties. We derived the Stejskal-Tanner formula from the NMR flow equations using the Bessel functions and properties without the need to arbitrarily add the diffusion term. This confirms that diffusion is an intrinsic property embedded in the Bloch NMR flow equation and can be extracted by the use of appropriate mathematical functions such as Bessel functions and properties. The analytical solutions result in a non-Gaussian behavior of the diffusion signal which may be very useful when tissue environment is anisotropic such as in white matter of the brain. It is exciting to note that the diffusion coefficient is directly related to the T1 and T2 relaxation parameters. The abundantly available Bessel functions and properties can then be appropriately applied to acquire MRI signals in four separate buffers (real and imaginary parts as well as phase and absolute value). We may be able to monitor the effects of drugs on the functional activities of different tissues especially the brain by means of magnetic resonance Imaging.]]></description>
<pubDate>Mon,20 May 2013 00:00:00  GMT</pubDate>
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<title><![CDATA[Cardiovascular magnetic resonance imaging: Part II——the basic sequences and common techniques ofcardiovascular magnetic resonance]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.05.012</link>
<description><![CDATA[This article is the second section. The basic contrast behaviors, sequences,and requirements of cardiovascular magnetic resonance imaging were described in detail. First, three basic fast sequences for CMR imaging and different contrast behaviors were summarized. Second, some common used technique strategies for solving the problems in CMR imaging were presented.]]></description>
<pubDate>Mon,20 May 2013 00:00:00  GMT</pubDate>
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<title><![CDATA[MR imaging of the small bowel]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.05.013</link>
<description><![CDATA[MR Imaging of the small bowel can clearly show endoluminal, mural and extraluminal condition, meanwhile there is no radiation and good soft tissue resolution, thereby it is currently utilized more and more. Two MR imaging methods are MR enterography and MR enteroclysis，between them MR enterography is easier and no pain. It is the key to fulfill and dilate the lumen of small bowel with contrast medium. We prefer the 2.5% mannitol as the contrast medium. The MRI findings of various small bowel diseases are brief introduced.]]></description>
<pubDate>Mon,20 May 2013 00:00:00  GMT</pubDate>
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<title><![CDATA[The research progress of diffusion tensor imaging for early diagnosis of Alzheimer disease]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.05.014</link>
<description><![CDATA[Alzheimer disease (AD) is a chronic degenerative disease of central nervous system, with high incidence, diagnosed late, poor prognosis, which resulting in heavy burden of the family and the society. Magnetic resonance diffusion tensor imaging (DTI) is the only non-invasive method of displaying living brain white matter fiber currently. Studies have shown that DTI has a certain value for the diagnosis of Amnesia-mild cognitive impairment (aMCI) and AD, finding that the FA values decreased in the corpus callosum, the fornix and other areas in the brain of AD, which may providing some help for the early diagnosis of AD and the detection of pathological developments.]]></description>
<pubDate>Mon,20 May 2013 00:00:00  GMT</pubDate>
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<title><![CDATA[Study of proton magnetic resonance spectroscopy in the aging process of normal brain]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2013.05.015</link>
<description><![CDATA[Magnetic resonance spectroscopy (MRS) offers a unique, noninvasive approach to assess cerebral metabolism in vivo. This paper is devoted to reviewing the proton-magnetic resonance spectroscopic (1H-MRS) imaging techniques. The basic principle of 1H-MRS, commonly used positioning technology and the measured common metabolite are intruoduced essentially. It is intended to an important role to 1H-MRS in the clinical diagnosis and differential diagnosis of diseases of the central nervous system.]]></description>
<pubDate>Mon,20 May 2013 00:00:00  GMT</pubDate>
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