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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=201205</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
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<title><![CDATA[Magnetic resonance imaging advantage in the diagnosis of the head and neck lesions]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.05.001</link>
<description><![CDATA[The anatomic structures in the head and neck are tiny and complicated, the lesions are various. Reasonable utilization of magnetic resonance imaging can improve markedly the diagnostic sensitivity and the accuracy. This paper summarized the key points of the head and neck MRI and its perspective in the clinical and scientific research, aims at expanding the MRI applied extent in the head and neck, and improve the diagnosis.]]></description>
<pubDate>Sun,20 May 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[Study of optimizing MRI protocols for eyeball]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.05.002</link>
<description><![CDATA[Objective:  To optimize the MRI protocols for eyeball. Materials and Methods: FSE T1WI, T2WI (FOV was 18 cm×8 cm, 10 cm×10 cm, or 8 cm×8 cm, slice thickness was 4.0 mm, 3.0 mm, 2.0 mm respectively) and FSPGR (FOV was 18 cm×18 cm, 10 cm×10 cm, 8 cm×8 cm, slice thickness was 3.2 mm, 2.8 mm,  2.4 mm respectively) were performed with eye surface coil to optimize the protocols, then axial FSE T2WI was performed with head coil in 10 healthy volunteers, SNR, CNR and spatial resolution were computed with statistical treatment. Results: (1) For phantom, spatial resolution were 0.80 mm, 0.45 mm, 0.36 mm, when FOV were  18 cm×18 cm, 10 cm×10 cm, 8 cm×8 cm respectively with slice thickness/interval 4.0 mm/0.5 mm, matrix 288×224, NEX 2, the SNR of T2WI were 241.10, 94.01, 56.90, the SNR of T1WI were 805.22, 234.71, 156.88; the SNR of T2WI were 94.01, 71.57, 51.40 when slice thickness/interval were 4.0 mm/0.5 mm, 3.0 mm/0.3 mm, 2.0 mm/0.2 mm respectively with FOV 10 cm×10 cm, matrix 288×224, NEX 2; the SNR of T1WI was 223.34, 183.80, 130.43 with thickness/interval 3.2 mm/0 mm, 2.8 mm/0 mm,  2.4 mm/0 mm. The SNR of FSPGR images was 263.69, 95.40, and 67.35 when FOV were 18 cm×18 cm, 10 cm×10 cm, and  8 cm×8 cm. The SNR of FSPGR images were 95.40, 93.44, 67.39, when thickness/interval were 3.2 mm/0 mm, 2.8 mm/0 mm, 2.4 mm/0 mm with FOV 10 cm×10 cm, matrix 288×224, NEX 2. (2) For the 10 healthy volunteers, the SNR of T2WI was 166.22±45.17, 65.17±4.99, the CNR was 142.09±43.58, 54.98±5.48 when FOV was 18 cm×18 cm and 10 cm×10 cm with eye surface coil. The SNR was 70.53±6.58, 9.79±0.87, the CNR was 57.20±2.58, 6.35±0.34 when FOV was 18 cm×18 cm and  10 cm×10 cm with head coil, the SNR of T2WI with eye surface coil were 2.36 times (P<0.01) and 6.66 times (P<0.01) than with head coil, the CNR were 2.48 times (P<0.01), 8.66 times (P<0.01) when FOV 18 cm×18 cm and 10 cm×10 cm, there was no signiﬁcant difference between the SNR of T2WI with eye surface coil and FOV 10 cm×10 cm and T2WI with head coil and  18 cm×18 cm (P>0.05), but the spatial resolution of the images with eye surface coil (0.45mm) was higher than thatof the head coil (0.8 mm). Conclusion: The recommended MRI protocol for eyeball were FSE sequence, slice thickness 4.0 mm/0.5 mm, matrix 288×224, NEX 2, FOV 10 cm×10 cm for eye surface coil and 18 cm×18 cm for head coil.]]></description>
<pubDate>Sun,20 May 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[T2 hyperintensities in the brain with the neurofibromatosis type 1]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.05.003</link>
<description><![CDATA[Objective:  The aim of this study was to review the clinical value of the hyperintensity on T2WI (T2H) located within brain tissue in patients with NF1 (neurofibromatosis type 1, NF1). Materials and Methods: We retrospectively analyzed the hyperintensity on T2WI located within brain tissue in 78 patients with neuroﬁbromatosis type 1 (NF1), the morbidity, signal characteristics and localization of T2H were studied and statistical analyzed. The age of patients ranged from 2 to  60 years. Results: The T2H was observed in 55 NF1 patients on the brain MR images, the morbidity was 70.5% (55/78). The T2H were seen in 80.8% (42/52) of children and adolescent patients aged 2—18 years and 50.0% (13/26) of the adults (more than 18 years) with NF1, the results showed statistically significant difference between children and adolescent patients and adult patients (χ2=7.892, P =0.005). Most T2H was observed in the brainstem (65.5%, 36/55), cerebellum (58.2%, 32/55), basal ganglia (49.1%, 27/55), hippocampal (25.5%, 14/55)and thalamic (20%, 11/55). The T2H of patients aged 2—18 years located in brainstem (30 cases), cerebellum (29 cases), basal ganglia (22 cases), hippocampal (10 cases) and thalamic (9 cases), respectively. In patients over than 18 years, the T2H in the corresponding location was found in  6 cases, 3 cases, 5 cases, 4 cases and 2 cases. There were no signiﬁcant difference about the location of T2H between adolescent and adult patients (χ2=2.738, P=0.603). In all positive patients, 74.1% (20/27) of the T2H on the basal ganglia was discrete, The majority of lesions on the other locations were diffuse, the frequency of the T2H on the brainstem was 77.8% (28/36), the cerebellum was 90.6% (29/32) and the thalamic was 81.8% (9/11). Most lesions were multiple. Conclusion: The T2H are most frequent intracranial appearance in individuals with neuroﬁbromatosis type 1, especially in adolescents.]]></description>
<pubDate>Sun,20 May 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[MRI analysis of retinoblastoma in eye]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.05.004</link>
<description><![CDATA[Objective: To study MRI features and evaluate MRI values of retinoblastoma (RB) eyes which were identified by pathology. Materials and Methods: Total fourty-seven cases (male 30, female 12, ratio about 2:1) were included in the research. The ages ranged from 3 months to 8 years old, median was 2 years . All the MRI images were analyzed to evaluate the location, shape, signal and enhanced features of the masses. Results: Total 64 abnormal eyes were detected, bileteral eyes in 17 cases and unilateral eyes in 30 cases (the left and right eyes were equal). 35 masses in 24 eyes were spherical or ovale, lobulated 3 eyes 3 masses and irregular shaped 35 masses in 35 eyes. Single masses were found in 53 eyes, two masses in 7 eyes and three masses in 2 eyes. Calciﬁcation were found in 47 eyes, the signal is heterogeneous. Slight enhancement were seen in 7 eyes, mild enhancement in 31 eyes and marked enhancement in 2 eyes. Conclusion: MRI can clearly show the location, shape, number, signal and enhanced feature of RB masses. Furthermore MRI images can show masses outside eyes and the matastasis to brain.]]></description>
<pubDate>Sun,20 May 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[AsAssessment of extraocular muscle involvement in Gravesophthalmopathy by using dynamic contrast-enhanced Mrimaging
sessment of extraocular muscle involvement in Gravesophthalmopathy by using dynamic contrast-enhanced Mrimaging]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.05.005</link>
<description><![CDATA[Objective:  To assess EOMs involvement in GO by using DCE-MRI. Materials and Methods: EOMs of 50 patients with GO and 30 healthy controls were studied. Muscle cross-sectional area was measured on coronal T2W images. The image plane with the maximum cross-sectional area of each EOM was designated as segment Smax, one slice anterior to Smax was designated as Spre, and one slice posterior to Smax designated as Spost. The region of interest was placed on EOMs of different segments (Smax, Spre, and Spost) on coronal DCE-MRI. The DCE-MRI parameters, including time to peak enhancement (Tpeak), enhancement ratio (ER), and washout ratio (WR), were calculated. Results: There was no side difference in Tpeak, ER, and WR values of EOMs in patients with GO (P>0.05). Tpeak values in segment Smax was signiﬁcantly higher than that in segment Spre and Spost (P=0.000), and ER, WR values were signiﬁcantly lower than those in segment Spre and Spost (P=0.000). There was no signiﬁcant difference in Tpeak, ER, and WR values between the superior and the inferior rectus (P>0.05). Tpeak values of the medial rectus, lateral rectus, and the superior oblique muscle were signiﬁcantly lower than that of the inferior rectus (P<0.05). ER and WR values were signiﬁcantly higher than those of the inferior rectus (P<0.05). The Tpeak was positively correlated with the cross-sectional area (P<0.01), and the ER and WR were negatively correlated with the cross-sectional area (P<0.01). Conclusion: The superior and the inferior rectus in the segment with the maximum cross-sectional area were most prominently involved in GO, which could offer objective quantitative data for assessing EOMs involvement.]]></description>
<pubDate>Sun,20 May 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[Characteristic findings of dynamic contrast enhancement magnetic resonance imaging in proliferative diabetic retinopathy]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.05.006</link>
<description><![CDATA[Objective:  Magnetic resonance imaging, employing dynamic contrast enhancement MRI (DCE-MRI), was used to detect changes in blood-retinal barrier (BRB) damage in patients with diabetes, which contributed to diabetic retinopathy and highlighted new information available from such applications. Materials and Methods: Seven participants were proliferative diabetic retinopathy (PDR) who were 3 males, 4 females, mean age (54±14) years, mean duration of diabetes (9±4) years and 14 examined eyes, as well as 14 non-diabetic individuals of similar age who were 7 males, 7 females, mean age (50±15) years and 16 examined eyes. Images were obtained using a 1.5 T GE scanner system. And after obtaining ophthalmologic data, dynamic contrast enhancement MRI was applied for detecting BRB damage in patients with diabetes. Data were analyzed with NIH IMAGE software. Preretinal vitreous water signals were used for data analysis statistically. Results:  (1) The mean of the slope (the enhancement of the MRI signal to the time after contrast injection) in the control group was －0.0457±0.1129. The mean of the slope in PDR group was 0.4393±0.2697, which was signiﬁcantly higher (P <0.05) than the control group. (2) During the delayed scans the BRB leakage demonstrated clearly a gradient of high signal intensity inside the vitreous which spread with time, related to a large diffusion of paramagnetic contrast. (3) The time-intensity curve of dynamic contrast enhancement in the BRB leakage suggested a pattern with sustained enhancement.Conclusion: These results revealed that DCE-MRI can be used to detect BRB damages in diabetic retinopathy. Wide application of this technique for diagnosis and evaluation of treatment efﬁcacy in diabetic retinopathy is expected.]]></description>
<pubDate>Sun,20 May 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[MRI diagnosis of extramedullary plasmacytoma in sinonasal and orbit]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.05.007</link>
<description><![CDATA[Objective:  To study the MRI findings of extramedullary plasmacytoma in the sinonasal and orbit. Materials and Methods: The MRI and CT findings of  4 patients with extramedullary plasmacytoma in sinonasal and orbit were retrospectively reviewed. All cases were proved by pathology. Results: The tumor mainly occurred in sphenoid sinus in 1 case, in maxillary sinus and nasal cavity in 1 case, in orbital 1 case, cranium, nasal and orbital were involved 1 case. On MRI, the tumors were usually isointensity on T1WI and T2WI. After administration of contrast medium, the tumors showed midrange or strongly enhancement. Among 2 cases dynamic contrast MRI, dynamic contrast curve showed rapid ascend and slow descend 1 case, rapid ascend and rapid descend 1 case. On CT of 3 cases, showed osteolytic bone destruction adjacent to the tumors. Conclusion: The MRI findings of extramedullary plasmacytoma in sinonasal and orbit are characteristic, but lack of speciﬁcity. The ﬁnal diagnosis depend on the pathology. MRI is helpful in demonstrating the invaded extent of the lesions and can provide more comprehensive information in diagnosis and therapy of the tumor.]]></description>
<pubDate>Sun,20 May 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[MR imaging findings and its value of imaging stage of nasopharyngeal angiofibroma]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.05.008</link>
<description><![CDATA[Objective:  To evaluate MR imaging ﬁndings and the value of its imaging stage of nasopharyngeal angiofibroma. Materials and Methods: Imaging findings of seventy-four patients with nasopharyngeal angioﬁbroma conﬁrmed by pathology were studied, including: location, conﬁguration, margin, signal intensity, homogeneity of T2 weighted image, enhancement pattern, and signal voids. To record the invovled sites and structures of every case and underlines the imaging stage, the accuracy of MR imaging staging system were evaluated. Results: All 74 cases originated from the nasopharyngeal space. Other imaging features including: conﬁguration of round and ovoal in 32 cases (43.2%), irregularity in 42 cases (56.8%), margin of smooth in  18 cases (24.3%), lobular in 56 cases (75.7%). Comparing with gray matter of brain, iso-intensity in 69 cases (93.2%), hypo-intensity in 5 cases (6.8%) on T1 weighted images, hyper-intensity in 66 cases (89.1%), iso-intensity in 8 cases (10.9%) on T2 weighted images. T2 signal is homogeneous in 8 cases (10.9%), heterogeneous in 66 cases (89.1%), and cystic area was demonstrated in two cases. Markedly heterogeneous enhancement was exhibited in 49 cases (66.2%) and homogeneous enhancement in 25 cases (33.8%) after contrast injection. Signal voids in 61 cases (82.4%) of 74 cases. The results of MR imaging stage of 74 cases is:Ⅰa stage 6 cases (6 cases), Ⅰb stage 2 cases (2 cases), Ⅱa stage 5 cases (5 cases), Ⅱb stage 20 cases  (20 cases), Ⅱc stage 14 cases (18 cases), Ⅲa stage 18 cases (13 cases), Ⅲb stage  9 cases (10 cases). Conclusion: MR imaging feature is characteristic for nasopharyngeal angiofibroma. MR imaging stage system can be used as the pre-operation stage of nasopharyngeal angioﬁbroma in clinics.]]></description>
<pubDate>Sun,20 May 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[Dynamic enhanced MRI in the diagnosis of thyroid disease]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.05.009</link>
<description><![CDATA[Objective:  To analyze the dynamic enhancement features of 42 cases with thyroid lesions. Materials and Methods:  Forty-two patients (32 women and 10 men, 28 benign and 14 malignant) were included in this prospectively study. Thyroid lesions were prospectively included and underwent DCE MRI before surgery and biopsy. The time-intensity curve (TIC), maximum enhancement ratio (ERmax) and the maximum rise slope (Slopemax) were generated using post-processing Functool software. The median test (2 independent-samples location test) was analyzed by using statistical software SPSS 12.0. Results:  All of the 21 cases with I-type curve (rapid increase) were benign thyroid. In 9 cases of II-type curve (platform type), 7 cases were benign lesions and 2 cases were follicular thyroid cancer. All of the 12 cases with III-type curve (delayed up) were malignant lesions. There were signiﬁcant difference (χ 2=4.66, P =0.03) between Slopemax of thyroid carcinoma (median 0.72%/s) and Slopemax of benign lesions (median 4.58%/s). There were signiﬁcant difference (χ 2=4.66, P =0.03) between ERmax of thyroid carcinoma (median 82.82%) and ERmax of benign lesions (median 57.72%). Conclusion:  (1) Dynamic contrast-enhanced MR imaging helps to differentiate benign thyroid lesions from and malignant ones. (2) Thyroid carcinoma shows delayed rise in time-intensity curve with dynamic contrast-enhanced MR imaging. Benign thyroid lesions shows rapid increase in time-intensity curve with dynamic contrast-enhanced MR imaging.]]></description>
<pubDate>Sun,20 May 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[Quantitative measurement of ADC value and T2 value in diagnosis of cervical lymphoma at 3.0 T MRI]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.05.010</link>
<description><![CDATA[Objective:  This study was designed to compare the value of  quantitative measurement of ADC value and T2 value in diagnosis of lymphoma at 3.0 T MRI. Materials and Methods:  Twenty-four cervical lymphoma patients (incipient group) characterized by superﬁcial lymph node enlargement and 24 healthy volunteers were studied. Twenty-four cervical  lymphoma patients performed MRI examination and quantitative measurement again after 3 months normal treatment. Imaging were performed on a 3.0 T MR imaging system. The measurements of ADC value and T2 value were performed from trace ADC maps and T2 maps by placing regions of interest (ROI) over the cervical lymph nodes. Comparison between groups with LSD test. Results:  Either lymphoma patients or normal control ,all lymph nodes showed high intensity on DWI images and low intensity on ADC  maps. On T2 value image the lymph nodes showed high intensity in all different TE value images , median intensity onT2 map. The ADC value and T2 value among incipient group, posttreatment group and normal control were (745.92±109.74)×10-6 mm2/s and (87.18±9.35) ms, (1303.97±276.59)×10-6 mm2/s and (93.30±11.21) ms, (1116.91±82.08)×10-6 mm2/s and (96.44±4.40) ms. There were signiﬁcant statistical difference among all of them except for T2 value between posttreatment group and normal control. The optimal threshold ADC value and T2 value for differentiating normal and malignant cervical lymph nodes determined by ROC curve analysis were showed 1003.065×10−6 mm2/s and  90.92 ms . Applying this value resulted in a sensitivity of 100% and 62.5%, a speciﬁcity of 91.7% and 91.7%. Conclusion:  The quantitative measurements of ADC value and T2 value at 3.0T MRI were important indicator  in diagnosis of cervical  lymphoma .The diagnostic sensitivity and speciﬁcity of ADC value was superior to T2 value.]]></description>
<pubDate>Sun,20 May 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[Value of ESWAN in diagnosis of multiple intracerebral cavernous angioma]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.05.011</link>
<description><![CDATA[Objective:  To evaluate the diagnostic value of enhanced gradient echo T2*  weighted angiography (ESWAN) in multiple intracerebral cavernous angioma (CA).  Materials and methods:  The MRI data of the 47 patients with intracerebral cavernous angioma were retrospectively analyzed.  And the sensitivity and speciﬁcity of ESWAN were compared with conventional sequences of MRI. Results:  In 47 patients, ESWAN showed all the lesions of intracerebral cavernous angioma, and typically showed the sample of popcorn, mulberry or fully hypointensity. The difference of detection among MRI sequences was statistically signiﬁcant (P<0.05). Conclusion:  ESWAN is the best sequence which has higher sensitivity and speciﬁcity than conventional MR images in the diagnosis of cavernous angioma.]]></description>
<pubDate>Sun,20 May 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[Manifestations of Glomus Tympanicum Tumors on MRI]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.05.012</link>
<description><![CDATA[Objective:  To study MRI manifestations of glomus tympanicum tumor. Materials and Methods: The manifestations of MRI were analysed retrospectively in 13 patients with glomus tympanicum tumors whom conﬁrmed by the operation and pathology, axial and coronal high resolution MRl (plain scan and enhanced scan) were performed in all of these 13 patients. Results: Glomus tympanicum tumor in middle ear all of 13 cases occurred in the hypotympanum next to promontorium tympani. MRI show iso-or hyperintense mass on T1-weighted images,and hyperintense mass on  T2-weighted images. When we increased the signal of T1WI, the tumors were enhanced obviously. The mass sive ranged from 0.4 cm×0.4 cm×0.5 cm to 1.6 cm× 2.0 cm×2.8 cm. Conclusion: It is typically to reveal the features of location,shape,and extent of glomus tympanicum tumors on MRI.]]></description>
<pubDate>Sun,20 May 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[Preliminary study of DTI in the early diagnosis of cirrhosis patients with spinal cord lesions]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.05.013</link>
<description><![CDATA[Objective:  To investigate the value of early diagnosis of the average diffusion coefﬁcient (DCavg) and fractional anisotropy (FA) of the magnetic resonance diffusion tensor imaging (DTI) in hepatic cirrhosis patients with spinal cord lesions. Materials and Methods:  According to the standard of Child-Pugh classification, select A, B and C-class (group) patients (15 cases respectively) and 15 cases of normal healthy volunteers as controls (Group D). All the subjects accept thoracolumbar spinal DTI scan, b=500 s/mm2, 25 different directions of diffusion gradient. Reconstruct the DCavg and FA pseudo-color pictures by the post-processing of raw data and measure its value. Analysis of variance is used for the comparison of A, B, C, D group, the Bonferroni is used for the multiple comparison between groups, t test is used for the comparison between the control group and the hepatic cirrhosis group. Results:  The value of DCavg of thoracolumbar spinal in normal control group (15 cases) is (1.330±0.160) ×10-3 mm2/s, the value of FA is 0.320±0.150, the value of DCavg of thoracolumbar spinal in hepatic cirrhosis group (45 cases) is (1.415±0.250) × 10-3 mm2/s, the value of FA is 0.404±0.110, the difference of the value of DCavg and FA between the two groups are signiﬁcant (t =4.896, P <0.05, t =16.456, P <0.05). The value of DCavg of thoracolumbar spinal cord in A, B, C group are respectively (1.342±0.100) ×10-3 mm2/s, (1.371±0.230) ×10-3 mm2/s, (1.492±0.290) ×10-3 mm2/s, the value of FA are respectively 0.353±0.110, 0.385±0.130, 0.446±0.090. The difference of the value of DCavg and FA among the groups is signiﬁcant (P <0.05). The value of DCavg and FA in group C are higher than the Group A, B and D, the difference is signiﬁcant (P <0.05). The difference of the value of DCavg and FA between Group A and D is no signiﬁcant difference (P >0.05). Conclusions:  Compared with the normal, the value of DTI DCavg and FA of thoracolumbar spinal cord values in patients with hepatic cirrhosis is higher, the DTI could provide more information for the early diagnosis and condition assessment in hepatic cirrhosis patients with spinal cord lesions.]]></description>
<pubDate>Sun,20 May 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[Diagonostic value of B-TFE combined with 3D DCE-MRA in Budd-Chiari syndrome]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.05.014</link>
<description><![CDATA[Objective:  To evaluate the value of B-TFE combined with 3D DCE-MRA in diagnosis of Budd-Chiari syndrome (BCS). Materials and Methods: 32 cases with BCS proved by DSA were performed with B-TFE and 3D DCE-MRA imaging, among which 8 cases were inferior vena cava (IVC) obstruction, 22 cases were IVC and hepatic vein (HV) obstruction, and 2 cases were HV obstruction. The obstruction of IVC and HV and collateral circulation were recorded on both methods images. Results: B-TFE accurately displayed 8 case with ICV obstruction, 18 cases with IVC and HV obstruction, and 2 cases with HV obstruction; the correct rate was 87.5% (28/32). 3D DCE-MRA accurately displayed 8 case with ICV obstruction, 19 cases with IVC and HV obstruction, and 1 case with HV obstruction, the correct rate was 93.8% (30/32). B-TFE showed 193 collateral vessels, and 3D DCE-MRA showed  248 collateral vessels. Combined B-TFE with 3D DCE-MRA, all of BCS and collateral circulation were accurately displayed. Conclusion Combine B-TFE with 3D DCE-MRA is an ideal diagnostic method for BCS.]]></description>
<pubDate>Sun,20 May 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[syngo TWIST for dynamic time-resolved MR angiography]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.05.015</link>
<description><![CDATA[With the advantages of non-invasion, low false positive rate and so on, 3D dynamic contrast-enhanced MRA has been recognized as one MR technique with high diagnostic value and clinical significance. But for conventional contrastenhanced MRA, it is hard to estimate the time of delayed scanning after contrast injection and eliminate the venous contamination. syngo TWIST technique launched
by Siemens achieves significant improvements in temporal and spatial resolution by manipulating the k-space coverage and using in combination with parallel imaging. With syngo TWIST, there is no need to judge the time to peak after contrast injection. We can completely eliminate the venous contamination and use smaller amounts of contrast agent. In this paper, the underlying principles and initial clinical applications for syngo TWIST will be presented which shows the potential to be applied in the assessment of vascular disease..]]></description>
<pubDate>Sun,20 May 2012 00:00:00  GMT</pubDate>
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<title><![CDATA[Recent advances in clinical of skull base chordoma]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2012.05.016</link>
<description><![CDATA[Skull base chordoma is a rare low-grade malignant tumor. Due to its critical location, local aggressive nature, and high recurrence, skull base chordoma is still a challenge to clinicians. In this review, we summarize the epidemiology, clinical manifestations, imaging features and histopathology of skull base chordoma. Moreover, through the detailed review on this tumor’s clinical type and stage, management, and prognostic factors, we find out that many aspects of the skull base chordoma, at home and abroad, are still significant differences. Further studies are necessary to evaluate these differences of skull base chordoma.]]></description>
<pubDate>Sun,20 May 2012 00:00:00  GMT</pubDate>
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