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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=201510</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
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<title><![CDATA[A correlation study between diffusivity of ischemic white matter fiber tract and neuro-functional recovery in patients with acute stroke by using DTI technique]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.10.003</link>
<description><![CDATA[Objective: To evaluate the correlation between diffusivity of ischemic white matter fiber tract and neuro-functional recovery in acute stroke patients by using DTI, and try to predict the motor outcome of these patients. Materials and Methods: Forty unilateral cerebral ischemic patients with motor dysfunction underwent MRI and DTI study within three days after the onset of illness. MRI and DTI scans were done one, two and three month after treatment. Fractional anisotropy (FA) and apparent diffusion coefficient (ADC) maps were obtained. With the reference of DW images, regions of interest (ROIs) were selected on the ischemic white matter fiber tract, and the control ROIs were selected on the contra-lateral homonymic white matter fiber tract. The ratios of FA and ADC (rFA and rADC) within these ROIs and infarction volume were calculated. The relationship between DTI parameters with infarction volume and national institute of health stroke scale (NIHSS) scores were assessed. According to motricity index (MI), a total of thirty-two stroke follow-up patients after one year treatment were divided into no motor deficit group and motor deficit group and DTI parameters were used to predict the motor outcome. Results: Significant differences were found regarding rFA, rADC and infarction volume of ischemic white matter fiber tract among the onset, one, two and three months of the stroke patients (F=13.84, P=0.00; F=64.57, P=0.00 and F=37.41, P=0.00). There was significantly negative correlation between rFA and NIHSS scores at the onset and one month (r=-0.59, t=-4.59, P=0.00; r=-0.34, t=-2.27, P=0.02) and between rADC and NIHSS scores at the onset (r=-0.44, t=-3.04, P=0.00). There was significantly positive correlation between rADC and NIHSS (r=0.28, t=1.83, P=0.04; r=0.39, t=2.69, P=0.00; r=0.63, t=4.99, P=0.00) and between the infarction volume and NIHSS scores (r=0.40, t=2.73, P=0.01; r=0.44, t=3.05, P=0.00; r= 0.32, t=2.13, P=0.04) at one, two and three months from the onset. There was significant correlation between the rFA of the onset, the rADC of three months treatment and MI of thirty-two stroke patients after one year (t=2.95, P=0.00 and t=2.75, P=0.01). For rADC at three months, the area under curves of ROC was 0.905. Conclusion: Our results suggest that there could be a significant correlation between the change of diffusivity of the ischemic white matter and the neuro-functional recovery in the acute stroke patients by analyzing DTI metrics. ADC values at three months after onset of the acute stroke patients may be used to predict the motor outcome.]]></description>
<pubDate>Tue,20 Oct 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Magnetic resonance imaging for the diagnosis and prognosis of neonatal cerebral white matter diffuse excessive high signal intensity]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.10.004</link>
<description><![CDATA[Objective: To explore the value of magnetic resonance imaging (MRI) in the diagnosis and prognosis of neonatal cerebral white matter diffuse excessive high signal intensity (DEHSI). Materials and Methods: To compare and analyze the typical features in MRI, the process of cerebral white matter lesions and the neurodevelopmental outcomes of neonates. Results: Postnatal age, gestational age， head girth had a significantly negative correlation with DEHSI (r=－0.266, －0.303,  －0.200, all P＜0.05). There was a negative correlation between the grade of DEHSI and the Gesell scores (ADQ, GMDQ, FMDQ, LDQ, PSDQ) of infants at 5 month corrected age (r=－0.423, －0.499, －0.553, －0.317, －0.453, all P＜0.05). Conclusion: Extrauterine exposure time could promote the degree of prematurity in infants. In addition, the long time stay in intrauterine, the higher the maturity, and the lower grade of DEHSI. MRI could distinguish the different grades of DEHSI and assess the neurodevelopmental outcomes. The neurodevelopmental outcomes was poor in moderate-sereve DEHSI of infants, which was good in infants with no or mild DEHSI.]]></description>
<pubDate>Tue,20 Oct 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Application value of DTI tracing the optic tract and optic radiation for the selection of postoperative radiotherapy plan of cerebral gliomas]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.10.005</link>
<description><![CDATA[Objective: To analyze whether the optic tract and the optic radiation showed by diffusion tensor imaging (DTI) can be used to evaluate the value in the guidance of selecting postoperative radiotherapy plan of cerebral gliomas.  Materials and Methods: Thirty patients with confirmed cerebral gliomas underwent conventional and contrast-enhanced MRI and DTI before postoperative radiotherapy. In order to delineate the radiotherapy target volume, organs at risk, optic tract and optic radiation, tractography data sets was fused with correlation MR and CT anatomy image by importing it to radiotherapy planning system. The radiotherapy plans developed with intensity modulated radiation therapy (IMRT) and three- dimensional conformal radiotherapy (3D-CRT) techniques were compared.  Results: Both the IMRT and the 3D-CRT plans were ensured the therapeutic dose to the target volume and conventional organs at risk had been protected. The doses patients suffered by using the IMRT plan were lower than that of the 3D-CRT plan both in affected,unaffected side optic tract and optic radiation (P<0.05).  Conclusion: DTI can display the location, shape of the optic tract and optic radiation, and the relationship with postoperative radiotherapy target volume of cerebral gliomas, and formulate protective treatment plan to reduce the radiation dose suffered by the optic tract and optic radiation, thereby reducing the visual dysfunction risk after radiotherapy.]]></description>
<pubDate>Tue,20 Oct 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Application value of doubly excited Balance-SSFP sequence curvature plane reconstruction in vascular compressive trigeminal neuralgia and hemifacial spasm]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.10.006</link>
<description><![CDATA[Objective: To evaluate the application value of doubly excited Balance-SSFP sequence Curvature Plane Reconstruction (CPR) in vascular compressive Trigeminal Neuralgia (TN) and Hemifacial Spasm (HFS).  Materials and Methods: Forty-eight cases with Trigeminal Neuralgia (TN) and thirty-three cases with Hemifacial Spasm (HFS) were accepted 3D-FIESTA-C scanning. The origin images were post-processed with Curvature Plane Reconstruction (CPR) on workstation. Relationship between vessels and nerves was analyzed in symptomatic side. Sixty-five out of 81 cases were compared with surgery result, and 2 magnetic resonance physicians evaluated consistency test of result through Kappa analysis.  Results: Eighty-one cases through Curvature Plane Reconstruction (CPR) show that contactless of vessels and nerves were found in 8 patients, contact of vessels and nerves were found in 25 patients and oppression were found in 48 patients. In the cases of contact and oppression, 33 cases indicated that the spacing of side cistern was narrow compared with contralateral ones, and 12 cases of brain stem showed deformation. The Kappa consistency test result between CPR result and post-operation of MVD result for 65 cases done by 2 physicians was that (K values were 0.837 and 0.787 respectively), 3D-FIESTA-C combined with CPR showed source of responsible vessels, oppression position and level of nerve oppression. The sensitivity was 96.92%, specificity was 75%, PPV was 94.02% and NPV was 85.71%.  Conclusion: Doubly excited Balance-SSFP sequence CPR can provide a more comprehensive and accurate viewing angle for vessels and nerves anatomy relations, and offer important evidence for pre-surgery evaluation and etiological diagnosis.]]></description>
<pubDate>Tue,20 Oct 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[MRI of sacral plexus: three-dimensional sampling perfection with application optimized contrasts using different flip angle evolutions versus three-dimensional double-echo steady state]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.10.007</link>
<description><![CDATA[Objective: To compare three-dimensional double-echo steady state (3D-DESS) and three-dimensional perfection with application optimized contrasts using different flip angle evolutions (3D-SPACE) in the evaluation of sacral plexus (SP). Materials and Methods: Ten volunteers underwent 3D-DESS and 3D-SPACE using a 3.0 T MRI scanner. Ninety-eight consecutive patients with suspected SP disease underwent 3D-DESS and 3D-SPACE at a 3.0 T MRI. The scores and details SP in 3D-DESS and 3D-SPACE had been prospectively interpreted by 2 radiologists Standardized “Likert” scales from 1 to 5 were used to evaluate the imaging qualities; the length of L5 and size of L5 ganglions in 3D-DESS and 3D-SPACE were applied using comparative t-test to perform statistical analysis. Comparisons between normal and abnormal anatomy in SP were evaluated using the Mann-Whitney U test.  Results: 3D-SPACE was significantly superior to 3D-DESS (t=9.481, t=5.45, P=0.000) in the evaluation of SP nerve fibers. There was no significance in L5 ganglions size (P=0.79, P=0.70 respectively) between 3D-DESS and 3D-SPAC; 3D-SPACE (4.41±0.67) was significantly superior to 3D-DESS (3.75±0.75) in normal anatomy structures (U=38, P=0.036). 3D-DESS (4.07±0.83) was superior to 3D-SPACE (3.57±0.65) in evaluating the detailed pathological structures, however, there was no significant differences (U=65, P=0.099).  Conclusion: 3D-DESS is significantly superior to 3D-SPACE in the evaluation of the detail of SP. Combined 3D-DESS and 3D-SPACE provide a noninvasive tool in the evaluation of SP.]]></description>
<pubDate>Tue,20 Oct 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Gd-EOB-DTPA enhanced MR imaging: a study about the delay time of hepatobiliary phase in patients with normal liver function]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.10.008</link>
<description><![CDATA[Objective: To assess whether, in patients with normal liver function, a hepatobiliary delay time of 10 min after Gd-EOB-DTPA injection is sufficient for lesion detection and diagnosis. Materials and Methods: A total of 38 patients with normal liver function who has liver lesion were included in this study, and MRI was performed after intravenous Gd-EOB-DTPA, followed by dynamic contrast phases at 25 s, 60 s, 180 s and hepatobiliary phases at 10 min and 20 min. We’ve measured the signal intensity (SI) of liver and erector spinae muscle, and then calculating liver ratio, muscle ratio, liver-muscle ratio, liver SNR, lesion SNR (hypo- and hyperintense lesions) and CNR (hypo- and hyperintense lesions), recording the time of contrast agent excrete in bile ducts meanwhile. In all, we compared the differences of liver SI and the ability to show lesion’s information between 10 min and 20 min hepatobiliary phases. Results: Following enhancement, liver SI increased significantly up to 10 min, and subsequently stabilized. Differences of liver ratio, muscle ratio and liver-muscle ratio between hepatobiliary phases of 10 min and 20 min were statistically significant(P<0.05). There was no statistical difference of liver SNR between hepatobiliary phases of 10 min and 20 min(P>0.05). Difference of hyperintense lesions SNR between 10 min and 20 min hepatobiliary phases was statistically significant(P<0.05), but hypointense lesions SNR wasn’t (P>0.05). Neither hypo- nor hyperintense lesions CNR has statistical difference between 10 min and 20 min hepatobiliary phases(P>0.05). Besides, biliary contrast agent excretion was first observed after 10 min in 26 patients (68.42%). Conclusion: A hepatobiliary delay time of 10 min after Gd-EOB-DTPA injection is sufficient for lesion detection and diagnosis in patients with normal liver function.]]></description>
<pubDate>Tue,20 Oct 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[The value of MR magnetic sensitive technology to identify the cystic renal cell carcinoma and complex renal cysts]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.10.009</link>
<description><![CDATA[Objective:  To explore the value of MR magnetic sensitive technology to identify the cystic renal cell carcinoma (CRCC) and complex renal cysts (CRC). Materials and Methods: Fourteen cases of CRCC and thirteen cases of CRC confirmed by pathology were retrospectively analyzed. The signal performance on T1WI, T2WI, and on magnitude which were generated from enhanced T2 star weighted angiography (ESWAN) data were observed, the Chi-square test was used to compare the difference between each sequence of two groups. The appearance of intratumoral susceptibility signal intensity (ITSS) on the phase map of two groups were observed and scored by two observers, the Kappa test was used to evaluate the consistency of two observers, and the Mann-Whitney U test was used to compare the score difference appearance of ITSS on the phase map of two groups. The values of phase and R2* of two groups were measured by two observers, the data continuity of two groups were measured by the intra-class correlation coefficients (ICC), and used the Mann-Whitney U test to compare various parameters of two groups whether  they have statistical difference. Receiver operator characteristic (ROC) curve was used to calculate the cut-off value of phase, R2* and performance of phase, R2* value for distinguishing the CRCC and CRC. Results: The signal performance of CRCC and CRC had no difference on T1WI, T2WI, magnitude map (P＞0.05). The consistency of two observers was good (Kappa＞0.70), and the score of the appearance of ITSS on the phase map on CRCC (1.93±1.14) was higher than that on CRC (0.77±1.01) (P=0.01). The phase values and R2* values of the two groups obtained from the two observers were in good consistency (ICC＞0.70), and the score of the appearance of ITSS on the phase map on CRCC (1.93±1.14) was higher than that on CRC (0.77±1.01) 0.75), the phase and R2* values of CRCC and CRC were -0.030±0.052 and 0.041±0.085, (28.14±8.26) Hz and (15.99±6.29) Hz respectively, the result was statistically significant (P < 0.05). The AUC of phase and R2* values were 0.786, 0.885, the best cut-off values for phase and R2* in characterizing the CRCC from CRC were 0.010 and 17.81 Hz. The sensitivity, specificity were 85.7%, 69.2% and 100.0%,  69.2% respectively.  Conclusion: The CRCC and CRC which conventional MR sequences have difficulty to identify, CRCC had more ITSS on phase map. Phase and R2* values can be used as a quantitative index to identify CRCC and CRC, and R2* value is more valuable.]]></description>
<pubDate>Tue,20 Oct 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Discussing MRI stripe sign of brain developmental venous anomaly]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.10.010</link>
<description><![CDATA[Objective: To discuss the stripe sign of developmental venous anomaly and the cause of formation and diagnostic value. Materials and Methods: The clinical and imaging data of 8 cases of DVA confirmed by contrast MRI were retrospectively analyzed. Results: In 8 cases, 3 cases were located at cerebellar hemisphere, 3 cases located beside the body of the lateral ventricle, 1 case located at the frontal lobe, 1 case located at the cerebellar hemisphere and the forth ventricle accompanying with cavernous hemangioma of cerebellum; All of 8 cases show low signal in T1WI and different high signal in the enhancement scanning, 4 cases show sea snake caput sign; In T2WI 5 cases show three groups of black and white stripes, 1 case shows round dot high signal, 2 cases show a single group of black and white stripe; In FLAIR 4 cases show three groups of black and white stripes. Conclusion: The cause of  the formation of DVA stripe sign are flow phase shift artifact and vascular pulsing artifact, and the stripe sign has important significance in the diagnosis of DVA.]]></description>
<pubDate>Tue,20 Oct 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Clinical application of contrast enhanced MRI 3D-Space-iso sequence in the entire segment spinal nerve roots imaging]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.10.011</link>
<description><![CDATA[Objective: To investigate the display technique and application value of 3.0 T magnetic resonance contrast enhanced 3D-Space-iso sequence in the entire segment spinal nerve roots lesions.  Materials and Methods: Fifteen cases of patients with spinal nerve roots lesions and 3 cases of healthy volunteers were included. MRI conventional sequence, coronary 3D-Space-iso sequences (contrast enhanced and non-contrast enhanced) were performed in all cases. The source coronal images of 3D-Space-iso were further reconstructed using maxium intensity projection(MIP) technique. All displayed nerve roots were morphologically analyzed and the relation with lesions was evaluated.  Results: Contrast enhanced 3D-Space-iso sequence has the best visualization than the other two sequences of spinal nerve roots spinal ganflion, postganglionic neurofibers and the degree of invasion and compression by the lesions. Among the 15 cases, there were 10 cases of disk herniation, 3 cases of tumor and 2 case of nerve root cysts.  Conclusion: Contrast enhanced 3D-Space-iso sequence shows more advantages in displaying the internal structures of spinal nerve roots and the relation with lesions. It can provide definitely diagnostic basis for spinal nerve root diseases in clinical practice.]]></description>
<pubDate>Tue,20 Oct 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Value of digital X-ray mammography and 3.0 T MRI in the diagnosis of small breast cancer]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.10.012</link>
<description><![CDATA[Objective: To investigate the value of X-ray mammography and 3.0 T MRI in the diagnosis of the small breast cancer. Materials and Methods: A total of 31 patients with small breast cancer confirmed by surgery and pathology were reviewed retrospectively, including digital X-ray mammography and 3.0 T MRI image features. Results: The diagnosis accuracy of small breast cancer by digital X-ray mammography was 64.5% (20/31) , the diagnosis accuracy of small breast cancer by 3.0 T MRI was 90.3% (28/31) , the diagnosis accuracy of small breast cancer by X-ray mammography and MRI was 96.7% (30/31) , which was the highest (P＜0.05). Conclusion: There are certain characteristics for breast cancer on X-ray mammography and MRI, which can help make correct diagnosis for it.]]></description>
<pubDate>Tue,20 Oct 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Semi-quantitative and quantitative parametric analysis of 3.0 T dynamic contrast-enhanced magnetic resonance imaging in diagnosing tumors of ovary]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.10.013</link>
<description><![CDATA[Objective: To evaluate the value of 3.0 T DCE-MR in diagnosing tumors of ovary.  Materials and Methods:Thirty-two cases of ovarian lesions (17 were malignant, 15 were benign) were evaluated in our study. All cases were received dynamic contrast-enhanced scanning on 3.0 T MR. The raw data was processed by SIEMENS TISSUE 4D software and the signal intensity time curve (TIC) was obtained and analyzed. Pharmacokinetic modeling of Tofts with a modeled vascular input function was used for the quantitative measurements volume: transfer constant (Ktrans), reverse volume transfer constant (Kep), the extravascular extracellular space volume per unit volume of tissue (Ve). The correlation of these measurements at each groups were investigated. Compare TIC curve and the data of perfusion parameters of each groups. Results: Among 17 malignant tumors, 9 were cystadenocarcinoma and 6 were metastatic adenocarcinoma, 2 were lymphoma. 15 benign lesions included 5 cystadenomas, 8 normal ovaries and 2 ovarian cysts. 100% cases of benign lesions belong to Type I curve and 71% cases of malignant tumors belong to Type II curve. There was statistically significant difference in TIC curve between benign and malignant groups (P＜0.05). If Type I curve was used as diagnostic criteria for benign and Type II for malignant, ROC resulted the AUC was 0.856. The mean value of perfusion parameters of the two groups were: Ktrans was (0.166±0.077) min-1 in malignant group and (0.071±0.025）min-1 in benign group, Kep was（0.455±0.172）min-1 in malignant group and (0.363±0.242) min-1 in benign group. Ve was（0.438±0.137） in malignant and (0.426±0.154）in benign group. Ktrans was significantly difference between the malignant group and benign group (P=0.000).  Conclusion: The Types of TIC and Ktrans value were important criterion in differentiating benign and malignant ovarian tumors in dynamic enhanced MR imaging. These parameters were important supplement for conventional morphology MR diagnosis.]]></description>
<pubDate>Tue,20 Oct 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[MRI research progress of encephalopathy in patients with type 2 diabetes]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.10.014</link>
<description><![CDATA[Type 2 diabetes mellitus is a kind of common chronic glycometabolism disorder. It can cause multiple terminal target organs damage, and diabetes related cognitive dysfunction has become a focus of attention for the researchers, but its pathogenesis remains unclear. Magnetic resonance imaging (MRI) has become an important means to study the biological basis of brain damage in vivo. This review will discuss the brain MRI imaging abnormalities about type 2 diabetes, and expects to provide some basis for clarifying the pathogenesis of type 2 diabetes encephalopa -thy and its clinical diagnosis and treatment.]]></description>
<pubDate>Tue,20 Oct 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[The research status and application prospect of magnetic resonance spectrum in alcohol addicts]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.10.015</link>
<description><![CDATA[The magnetic resonance spectrum technology is the only method to detect the concentration of metabolites quantificationally in the brain tissue. It can be used to detect the potential pathophysiologic changes of alcohol addicts before irreversible structural change. The aim of this study is to review the application and the research status of magnetic resonance spectroscopy in alcohol addicts.]]></description>
<pubDate>Tue,20 Oct 2015 00:00:00  GMT</pubDate>
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<title><![CDATA[Progress of quantitative dynamic contrast-enhanced magnetic resonance imaging and in diagnosis and evaluation on therapeutic response of prostate cancer]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.3969/j.issn.1674-8034.2015.10.016</link>
<description><![CDATA[Quantitative analysis of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) can reflect the hemodynamics information such as angiogenesis and the permeability of capillary, which may be of great help in the diagnosis and assessment of therapeutic response in prostate cancer. This article is to make a review about the basic principle of the quantitative analysis of DCE-MRI andits application in the diagnosis and assessment of therapeutic response in prostate cancer.]]></description>
<pubDate>Tue,20 Oct 2015 00:00:00  GMT</pubDate>
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