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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=201902</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
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<title><![CDATA[To establish user<sup>,</sup>s demand analysis and magnetic resonance image quality evaluation specifications and to promote the innovation and development of magnetic resonance imaging technology]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.02.001</link>
<description><![CDATA[To deeply explore the practical demands of medical magnetic resonance imaging (MRI) equipment in different districts and different levels of hospitals in China in perspective of clinical functions, equipment performance, user experience and after-sales service, so as to provide reference and guidance for the definition, development and optimization of domestic MRI equipment. To establish and improve the clinical application evaluation norms and systems of medical MRI equipment and to carry out scientific statistical verification on standardized big data sample sets, which is helpful to standardize the clinical application of MRI, improve the competitiveness of domestic MRI products and promote the development of Chinese MRI business.]]></description>
<pubDate>Wed,20 Feb 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Clinical image quality evaluation and comparison between different MRI equipment in the central nervous system]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.02.002</link>
<description><![CDATA[Objective: To evaluate and compare the clinical image quality of central nervous system of different types of MRI imaging equipment. Materials and Methods: According to the "MRI Accreditation Program Clinical Image Quality Guide" issued by the American College of Radiology in 2013, 531 cases of non-contrast brain MRI images were collected from more than 40 medical institutions nationwide, and 4 common sequences of these cases were evaluated by Likert five-point scale method. All the samples were divided into domestic group and imported group, as well as 1.5 T group and 3.0 T group for comparative study. Results: In the comparative study, most clinical image evaluation indexes of the 3.0 T group were better than those of the 1.5 T group (P＜0.05). In the 1.5 T group, most evaluation indexes of the imported subgroup were superior to those of the domestic subgroup (P＜0.05). In the 3.0 T group, the difference of most evaluation indexes between domestic and imported subgroups were not statistically significant. In the 1.5 T group, one of the domestic equipment (United Imaging) and other imported equipment (Siemens and GE) were selected for comparative study. Some evaluation indexes of the domestic equipment were better than those of the imported equipment, but there was still a gap between domestic and imported equipment with respect to some other evaluation indexes. Conclusions: In the aspect of the central nervous system MRI imaging, the image quality of the 3.0 T equipment is generally superior to that of the 1.5 T equipment, and the image quality of the domestic equipment is better than that of the imported equipment in some aspects, but there still exist some gaps between the overall level of the image quality of the domestic equipment and that of the imported equipment to some extent.]]></description>
<pubDate>Wed,20 Feb 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Clinical image quality evaluation of diffusion-weighted MR imaging of the brain of different medical MRI equipment]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.02.003</link>
<description><![CDATA[Objective: To evaluate and compare the clinical image quality of brain diffusion-weighted imaging sequence between different types of medical MRI equipment. Materials and Methods: Based on the “Clinical Image Quality Guide” issued by American College of Radiology, we made both subjective and objective image quaity evaluation of 531 cases of clinical brain MRI DWI sequences. Subjective evaluation was conducted mainly by Likert five-point scale method, and the objective evaluation was realized by measureing the signal-to-noise ratio of the region of interest. The images were divided into domestic and imported groups, as well as 1.5 T and 3.0 T groups according to the types of the scanning equipment for comparative studies, and domestic 1.5 T and 3.0 T MRI equipments of United Imaging were selected as representatives to be compared with the imported equipment. Results: (1) In the subjective evaluation, the 3.0 T group was better than the 1.5 T group and the domestic group was better than the imported group. In the objective evaluation, the 1.5 T group was better than the 3.0 T group and the difference between the domestic and imported groups was not statistically significant. (2) In the 1.5 T group, both subjective and objective evaluation of the domestic subgroup was better than that of the imported subgroup. In the 3.0 T group, the difference of the subjective evaluation between these two subgroups was not statistically significant, and the objective evaluation of the imported subgroup was superior to that of the domestic subgroup. (3) In the 1.5 T group, both subjective and objective evaluation of United Imaging was superior to that of the imported equipment. In the 3.0 T group, the difference of the subjective evaluation between United Imaging and the imported equipment was not statistically significant; the objective evaluation of United Imaging was better than that of GE, but there was a gap of the outcome between United Imaging and Philips, and the difference of the evaluation between United Imaging and Siemens was not statistically significant. Conclusions: With respect to the brain diffusion-weighted imaging, the clinical image quality of the 1.5 T domestic MRI equipment may be better than that of the imported equipment, but there is a gap of the image quality between domestic and imported equipment of 3.0 T field intensity.]]></description>
<pubDate>Wed,20 Feb 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Investigation and analysis of the clinical requirements for medical magnetic resonance imaging equipment and development tendency in China]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.02.004</link>
<description><![CDATA[Objective: To investigate the clinical demand of medical magnetic resonance imaging (MRI) from radiologists of different grades of medical institutions in China, so as to provide reference and theoretical foundation for the development of domestic MRI equipment. Materials and Methods: The clinical MRI demand questionnaire was optimized by the panel of experts comprised of radiologists, medical engineers and statisticians using Delphi method. The survey of clinical demand was carried out online (https://www.sojump. com/) with MRI users working in different grades of hospitals in China. Results: A total of 246 valid feedbacks from 21 provinces were collected from September to November, 2018. The survey of magnetic field strength requirements showed that 1.5 T and 3.0 T MRI were mostly demanded, with the percentage of 74.2% and 77.9% respectively. Less than 5% of the participants had the demand for MRI equipment with magnetic field strength under 1.5 T 25 first-level demand indicators and 29 second-level demand indicators were extracted from perspectives of clinical diagnosis, scientific research and prospective equipment. Conclusions: The medium and high-end MRI equipment are highly demanded among MRI users. Domestic MRI equipment manufacturers should conduct product positioning and technical research and development based on the specific demands of MRI users.]]></description>
<pubDate>Wed,20 Feb 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Investigation and analysis of the after-sales requirements for medical magnetic resonance imaging equipment in China]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.02.005</link>
<description><![CDATA[Objective: To investigate the after-sales demand of medical magnetic resonance imaging (MRI) from MRI practitioners in different grades of medical institutions, so as to provide reference for the optimization of after-sales service quality evaluation system and guidance for MRI equipment manufacturers to improve after-sales service quality. Materials and Methods: The after-sales service demand questionnaire was proposed by the joint of radiologists, medical engineers and statisticians using Delphi method. The survey of after-sales service demand was carried out among MRI practitioners from 70 different hospitals in 24 provinces. Results: A total of 246 valid feedbacks from 21 provinces were collected from September to November, 2018. After comprehensive analysis, 18 first-level demand indicators related to maintenance of MRI equipment were extracted. Among all these indicators, troubleshooting efficiency was mostly demanded. In addition, MRI users preferred on-site service rather than remote guidance. During the warranty period, the manufacturers should carry out 2-3 times of technical training for engineers, technicians and radiologists. The results showed the on-site training is more demanded than distance training. In terms of scientific research collaboration, the demand for scientific research project cooperation, protocal setting, and post-processing training in tertiary hospitals is higher than secondary hospitals. Conclusions: MRI equipment manufacturers should continuously improve after-sales service quality based on the specific demands of MRI users. The demand indicators from perspectives of maintenance services, technical training, and scientific research collaboration should be considered when establishing the after-sales service quality evaluation system.]]></description>
<pubDate>Wed,20 Feb 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Evaluating diagnostic value of 3D-SNAP high resolution magnetic resonance in intracranial artery dissection]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.02.006</link>
<description><![CDATA[Objective: To discuss the diagnostic value of 3D-SNAP high resolution magnetic resonance in the intracranial artery dissection. Materials and Methods: 43 patients who suffered an ischemic stroke or transient ischemia attach from Jan 2015 to Mar 2018 were prospectively collected. They were devided into the intracranial artery dissection group (n=18) and the non-dissection group (n=25). All patients were performed TOF-MRA, T1WI-VISTA, T2WI, 3D-SNAP and CE-T1WI using Philips Ingenia 3.0 T MRI. The intracranial artery dissection were blinded analyzed image findings every sequences. The independent sample t test or chi-square test was used for clinic data, image findings between intracranial artery dissection group and the non-dissection group. ROC curve was used to evaluate diagnostic efficiency of each sequence in intracranial artery dissection. Results: (1) The age between artery dissection group and the non-dissection was statistically significant (P＜0.05), it had no significant difference in gender, blood pressure, diabetes mellitus, and smoker between two groups. (2) There was significant difference in the displaying rates of intramural hematoma, double lumen, intimal flap signs in intracranial artery dissection on TOF-MRA, T2WI, T1WI-VISTA, SNAP and CE-T1WI. The SNAP was the most sensitive method for diagnosis of intramural hematoma, and the CE-T1WI was the most sensitive to display double lumen and intimal flap signs. (3) Areas of TOF-MRA, T2WI, T1WI-VISTA, SNAP, CE-T1WI, SNAP combined with CE-T1WI under ROC curves to diagnose intracranial arterial dissection were 0.663, 0.492, 0.729, 0.741, 0.752, 0.824, respectively. Conclusions: 3D-SNAP High resolution magnetic resonance is a noninvasive and effective method which has the greatest development potential and the most promising prospects to evaluate intracranial artery dissection.]]></description>
<pubDate>Wed,20 Feb 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Prediction of hemorrhagic transformation after revascularization in patients with acute ischemic stroke based on IVIM]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.02.007</link>
<description><![CDATA[Objective: To explore the significance of introvoxel incoherent motion (IVIM) imaging in predicting the hemorrhagic transformation (HT) of acute ischemic stroke (AIS) after revascularization and provide theoretical basis for individualized therapy. Materials and Methods: 60 patients with AIS confirmed by clinical or imaging examination were studied and all the patients were scanned with multi-b diffusion-weighted imaging (muti-b DWI) before revascularization. We used IVIM imaging technique to measure the three coefficients inclouding diffusion coefficient of pure diffusion (D), pseudo-diffusion coefficient (D*) and perfusion fraction (f) in infarct value and mirror region and then we calculated the relative values of each parameter (rD, rD*, rf). Further, we performed susceptibility weighted imaging (SWI) within 3 days after treatment, to observe the hemorrhagic transformation and analyze the relationship between IVIM parameters and HT after treatment in patients with AIS. Results: The D, D*, f values of the infarct area on the affected side of AIS patients before revascularization were lower than those of the contralateral mirror area, even there was a significant difference between the two sides (t=12.934, 12.234, 24.069, P＜0.01). the rD, rD*, rf values of the infarct area in the HT group before treatment were lower than those in the non-HT group, and there was a significant difference between the two groups (t=2.982, 3.090, 4.656, P＜0.01). After taking the optimal threshold of rD 0.527, rD* 0.519 and rf 0.495, the sensitivity and the specificity were 76.9%, 73.7%; 84.6%, 78.9%; 84.6%, 89.5% respectively. Conclusions: IVIM parameters of infarct area before treatment can predict a risk of HT in patients with AIS after revascularization, even having the highest value of rf.]]></description>
<pubDate>Wed,20 Feb 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Rim enhancement of meningiomas in contrast-enhanced T2 fluid-attenuated inversion recovery magnetic resonance imaging: Based on pathological findings]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.02.008</link>
<description><![CDATA[Objective: To determine the vessels condition of the tumor-brain interface for tumor adhesion preoperative prediction, we evaluate the rim enhancement of meningiomas on contrast-enhanced T2 fluid-attenuated inversion recovery (FLAIR) in meningiomas and the associated pathological findings. Materials and Methods: 89 patients with meningiomas underwent tumor excision in our hospital from June 2017 to June 2018. All patients have been performed 3.0 T MR scans, including sagittal and cross-sectional T1WI, cross-sectional T2WI, T2 FLAIR, sagittal and cross-sectional enhanced T1WI, and finally T2 FLAIR. Results: All meningiomas in 89 cases showed significant enhancement on MRI. On enhanced T2 FLAIR, 54 cases (60.7%) of meningiomas showed rim enhancement, 25 cases (28.1%) of which were not seen on the plain T2 FLAIR sequence or the enhanced T1-weighted (T1WI) images. The surface of the meningiomas with positive signs had higher microvessel density pathologically, indicating pia supply. Rather than the data collecting from enhanced T1WI images, 52 cases showed meningeal tail sign, 35 cases (39.3%) of which showed greater disctinction in enhanced T2 FLAIR images. Conclusions: The rim enhancement of meningioma on T2 FLAIR suggest the possibility of pial blood supply, which means the meningioma are supplied by both intracranial and extracranial arteries. It also provides pathologically predictive information about the tumor-brain interface to guide tumor excision surgery plan.]]></description>
<pubDate>Wed,20 Feb 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Exploring the influence of delivery mode on the risk of intracranial hemorrhage based on multicenter neonatal brain MRI]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.02.009</link>
<description><![CDATA[Objective: To analyze the influence of different delivery methods on the risk of intracranial hemorrhage (ICH) in neonates based on MRI. Materials and Methods: Retrospectively collected 3464 neonates with head MRI within 14 days after the birth of six hospitals (form Jan 2011 to Oct 2016). Cases with incomplete clinical data, inherited metabolic diseases, congenital craniocerebral dysplasia, prenatal intracranial hemorrhage, and MRI images that could not be used for analysis were excluded. Logistic regression analysis was used to compare the risk of neonatal ICH exposure to different modes of delivery. Results: A total of 1976 neonates were included for analysis. The Logistic regression model corrected for confounding factors and found that the risk of neonatal ICH in vaginal delivery increased by 4.27 times compared with cesarean section. Further stratification of vaginal delivery revealed that neonatal delivered by forceps had the highest risk of ICH, which was 7.52 times higher than those delivered by cesarean section. Among them, forceps delivery significantly increased the risk of subependymal-intraventricular hemorrhage, subarachnoid hemorrhage and subdural hemorrhage in neonates. Conclusions: Vaginal delivery may increase the risk of developing neonatal ICH, especially in forceps.]]></description>
<pubDate>Wed,20 Feb 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[The relationship between right ventricular myocardial strain and age gender by cardiac magnetic resonance tissue tracking]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.02.010</link>
<description><![CDATA[Objective: Using cardiac magnetic resonance tissue tracking (CMR-TT) to evaluate the normal range of longitudinal strain and strain rate in the right ventricular myocardium of healthy Chinese people, and to analyze its relationship with age and gender. Materials and Methods: A cohort of 100 healthy subjects from each decade of life between the 20 and 70 in first hospital of China Medical University without known congenital or acquired cardiovascular disease, hypertension, diabetes, dyslipidaemia and systemic inflammatory disorders underwent CMR-TT assessment of right ventricular (RV) myocardial strain and strain rate. Their LV systolic and diastolic function were normal. Results: Global longitudinal strain (GLS) (-24.2±4.6)%, female vs male [(-24.7±5.3)% vs (-23.5±3.6)%, P＞0.05]; the correlation between global longitudinal strain and age P＞0.05, longitudinal systolic strain rate (GLS S') -1.6±0.6(1/s), female vs male [-1.7±0.6(1/s) vs -1.5±0.7(1/s), P＞0.05]; longitudinal diastolic strain rate (GLS D')1.3±0.4(1/s), female vs male [1.3±0.3(1/s) vs 1.4±0.4(1/s), P＞0.05]; the correlation between longitudinal systolic strain rate and age P＞0.05; the correlation between longitudinal diastolic strain rate and age P＞0.05. Conclusions: The normal value ranges of longitudinal strain and strain rate of the right ventricular myocardium in healthy Chinese people were acquired using cardiac magnetic resonance tissue tracking. And the longitudinal strain and strain rate in the right ventricular myocardium have no correction with age and gender. Therefore the normal values of longitudinal strain and strain rate can be a sensitive standard for the clinical pre-diagnosis.]]></description>
<pubDate>Wed,20 Feb 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Apparent diffusion coefficient value study in different molecular subtypes of non-specific type invasive breast carcinomas]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.02.011</link>
<description><![CDATA[Objective: To investigate the characteristic of apparent diffusion coefficient (ADC) value in the four molecular subtypes of non-specific type invasive breast carcinomas (Luminal A, Luminal B, HER-2-enriched, Basal-like subtype) and its biological prognostic factors estrogen receptor (ER), progesterone receptor (PR), human epidermal growth factor 2 (HER-2) to provide the theory basis for identifying the different molecular subtypes and evaluating prognosis of breast cancer. Materials and Methods: One hundred and fifty-eight patients diagnosed as non-specific type invasive breast carcinomas with complete pathologic and preoperative MR data were retrospectively analyzed, preoperative diffusion weighted imaging were acquired (b=0, 800 s/mm2), the average ADC was measured; ER, PR, HER-2 and Ki-67 were obtained by immunohistochemistry, and the subtype of each case was decided. To investigate the characteristic of the ADC values in molecular subtypes and its biological prognostic factor. Results: ADC value of ER-negative, PR negative group and Ki-67 negative group was higher than that in ER-positive and PR-positive group and Ki-67 positive group (1.013±0.099, 1.002±0.094, 1.003±0.087 VS 0.932±0.066, 0.940±0.079, 0.952±0.089), the difference was statistically significant (P＜0.01, P＜0.01); ADC value of HER-2 positive group is significantly higher than that in HER-2 group negative (1.004±0.088 VS 0.948±0.088), the difference was statistically significant (P＜0.05); while only the ADC values of HER-2-enriched subtype was higher than Luminal B and Basal-like subtype (1.048±0.073 VS 0.923±0.074, 0.960±0.095, P＜0.01, P＜0.01). Conclusions: The four molecular subtypes and its biological prognostic factors present characteristic ADC value in non-specific type invasive breast carcinomas.]]></description>
<pubDate>Wed,20 Feb 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[MRI differentiation between breast mucinous carcinoma and fibroadenoma]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.02.012</link>
<description><![CDATA[Objective: To explore the MRI differentiation between breast mucinous carcinoma (MCs) and fibroadenoma (FAs) as to improve the diagnostic accuracy of MCs of the breast. Materials and Methods: 31 cases of breast MCs and 50 cases of FAs confirmed by pathology were collected. Results: Breast MCs and FAs T2WI all showed higher signal intensity on T2WI. ①Morphology: irregular margins were observed more frequently in MCs, but FAs showed more margin circumscribed. ②ADC value: the mean ADC value of pure-MCs was (1.8±0.5)×10-3 mm2/s, the mean ADC value of mixed-MCs was (1.0±0.6)×10-3 mm2/s, the mean ADC value of FAs was (1.4±0.30)×10-3 mm2/s. ③Internal enhancement characteristic: pure-MCs also showed delayed heterogeneous enhancement (45%, 9/20) and rim enhancement (45%, 9/20), mixed-MCs also showed heterogeneous enhancement (91%, 10/11), FAs showed homogeneous enhancement (44%, 22/50) and heterogeneous enhancement (40%, 20/50) and dark internal septation (14%, 7/50). ④Time signal intensity curve (TIC): pure-MCs and FAs also showed Ⅰ type, mixed-MCs also showed Ⅲ type. The difference of MCs and FAs was statistically significant (P＜0.05). Conclusions: Breast MCs and FAs are relatively characteristic in MRI. Correctly understanding the characteristics of MRI can improve the diagnostic accuracy of MCs.]]></description>
<pubDate>Wed,20 Feb 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Value of different 3.0 T MRI sequences in diagnosis of subtype of renal cell carcinoma]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.02.013</link>
<description><![CDATA[Objective: To explore the clinical value of different MRI sequences in differenting the subtype of renal cell carcinoma, and to provide the imaging basis of making treatment plan and determining the prognosis of renal cell carcinoma. Materials and Methods: The clinical data of forty renal cell carcinoma patients proved by post-operation pathology were analyzed retrospectively in our hospital from March of 2014 to March of 2017, which were grouped as clear cell renal carcinoma group (21 cases) and no clear cell renal carcinoma group (19 cases, in which papillary cell type 11 cases, chromophobe  cell type 8 cases). All the patients were checked with abdominal 3.0 T MRI and the sequences including routine scan, diffusion-weighted imaging and dynamic contrast enhancement. The occurrence rates of cystic degeneration, hemorrhage, necrosis and vein tumor emboli were statistical analysis, and the difference of apparent diffusion coefficient (ADC) value and tumor-cortical augmentation index in different time were also measured between two groups. Results: Compared with no clear cell renal carcinoma group, the occurrence rates of necrosis and cystic degeneration in clear cell renal carcinoma group were high, and the occurrence rates of hemorrhage were low, all which had significant difference (χ2=17.378, 5.414, 4.043, P=0.00, 0.020, 0.044), but the occurrence rate of vein tumor emboli between two groups was not significantly different (χ2=1.380, P=0.240). Area under the curve (AUC) of hemorrhage, necrosis, cystic degeneration and vein tumor emboli were 0.663, 0.828, 0.680 and 0.585; the ADC value of clear cell renal carcinoma was higher than that of no clear cell renal carcinoma, which was different significantly [(2.01±0.33)×10-3 mm2/s vs (1.49±0.13)×10-3 mm2/s, t=6.269, P=0.00]; the tumor-cortical augmentation index of clear cell renal carcinoma group in different stages were higher than those of no clear cell renal carcinoma (t=4.082, 6.059, 6.083, P=0.00, 0.00, 0.00), and the AUCs of tumor-cortical augmentation index in different phases were 0.817, 0.929 and 0.897 separately. The ADC values plus tumor-cortical augmentation index in nephrographic phase was 0.976, and the sensitivity was 0.976, specificity was 1.00. Conclusions: The sensitivity and specificity of ADC values plus tumor-cortical augmentation index were the highest in different 3.0 T MRI sequences, which had clinical reference value definitely.]]></description>
<pubDate>Wed,20 Feb 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Prediction of lymph vascular space invasion in cervical squamous cell carcinoma by using volumetric dynamic contrast-enhanced MRI]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.02.014</link>
<description><![CDATA[Objective: To investigate the value of semi-quantitative and quantitative parameters derived from volumetric quantitative dynamic contrast-enhanced MRI (qDCE-MRI) in the prediction of lymph vascular space invasion (LVSI) of the cervical squamous cell carcinoma. Materials and Methods: 25 patients who were newly diagnosed with cervical squamous cell carcinoma which was proved by surgical pathology were enrolled in Sun Yat-sen memorial hospital between July 2017 and March 2018. All patients were staged higher than IA and underwent conventional MRI and qDCE-MRI before surgery. Semi-quantitative parameters including time to peak (TTP), maximum slope (MaxSlope), area under curve (AUC) of time-concentration curve, maximum concentration (MaxCon) and quantitative parameters including volume transfer constant (Ktrans), efflux rate constant (Kep), extracellular-extravascular volume fraction (Ve), plasma volume fraction (Vp) were derived from DCE-MRI data by using the extended TOFT pharmaceutical kinetic model. The differences of these parameters between patients with or without LVSI were analyzed using Mann-Whitney test. The predictive performance of parameters was analyzed by receiving operating characteristic curve (ROC). Results: Among parameters derived from DCE-MRI, there was statistical difference between LVSI positive and negative groups in AUC (P=0.046). AUC was 2.012±1.969 in LVSI negative group and 3.188±1.993 in LVSI positive group. With 1.258 as threshold value, the accuracy, sensitivity and specificity of AUC in predicting the diagnosis of LVSI was 0.760, 0.900 and 0.667, respectively. The area under ROC was 0.740. There was no statistical difference in the other parameters between LVSI negative group and positive group (P＞0.05). Conclusions: Semi-quantitative parameter AUC of qDCE-MRI can be used to predict the LVSI in patients with cervical squamous cell carcinoma.]]></description>
<pubDate>Wed,20 Feb 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Application and development of PET/MRI in epilepsy]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.02.016</link>
<description><![CDATA[Epilepsy is one of the most common chronic neurological diseases for patients and it frequently occurs, which confers a weighty disease-related burden on individuals and families. In recent years, the field of neuroimaging has undergone dramatic development. Positron emission computed tomography/magnetic resonance imaging (PET/MRI) which provide complementary information by combining excellent soft tissue contrast and spatial resolution of MRI and high sensitivity and molecular specificity of PET came into being. PET/MRI has an obvious advantage in locating a seizure focus and the improvement of the outcome of the surgery.In this review, we identify the recent developments of PET/MRI in epilepsy.]]></description>
<pubDate>Wed,20 Feb 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Research progress of multi-modal magnetic resonance imaging in 
postherpetic neuralgia]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.02.017</link>
<description><![CDATA[Postherpetic neuralgia (PHN) is the most common type of clinical neuropathic pain. At present, the central mechanism of PHN is not fully understood, therefore clinical treatment is difficult. Currently, with the development of magnetic resonance imaging (MRI) technology, multi-modal MRI plays a complementary role in exploring the central mechanism of PHN. It is the aim of the paper to review the research progress in PHN regarding multi-modal MRI, and provide the clues for studying the central mechanism and clinical treatment of PHN.]]></description>
<pubDate>Wed,20 Feb 2019 00:00:00  GMT</pubDate>
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