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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=201705</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
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<title><![CDATA[The functional connectivity of orbitofrontal cortex in type 2 diabetes : a resting-state fMRI study]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.05.001</link>
<description><![CDATA[Objective: Our aim was to detect weather the functional connectivity between the orbitofrontal cortex (OFC) and other brain regions were impaired in type 2 diabetes mellitus (T2DM). Materials and Methods: Conventional magnetic resonance imaging (MRI) and blood oxygen level dependent resting-state functional MRI were obtained from 27 diabetic patients without cerebrovascular diseases on imaging, and from 21 age-matched healthy volunteers. The functional connectivity between the bilateral OFC and other voxels of the whole brain was calculated and compared between the two groups. The brain regions with significant differences between the groups were selected, then, the mean value of the functional connectivity between these regions was calculated. The correlations were analyzed with the clinical indexes. Results: Compared to the control group, the patients showed significantly reduced functional connectivity between the posterior of left medial OFC and left midbrain, right hypothalamus and bilateral thalamus. In the patients group, the mean value of functional connectivity between the posterior of left medial OFC and the left midbrain was positively correlated with the value of fasting plasma glucose (t=2.3727, P=0.028). Conclusions: The functional connectivity between the left OFC and multiple brain regions in patients with type 2 diabetes mellitus was impaired, and the reduced functional connectivity value between the left OFC and the left midbrain was significantly associated with the controlling of the plasma glucose, which indicated that type 2 diabetes mellitus may impaire some reward -related pathways, leading to eating disorders.]]></description>
<pubDate>Sat,20 May 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[The preliminary study of magnetic resonance pCASL technique in dyskinetic cerebral palsy patients]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.05.002</link>
<description><![CDATA[Objective: To observe the blood flow characteristics of brain movement area (posterior capsule cortex spinal cord bundle) in patients with involuntary movement of cerebral palsy by magnetic resonance pseudo-continuous arterial spin labeling (pCASL). To study the functional and pathological basis of the motor area of children with cerebral palsy by blood flow changes, and to provide the image support for clinical treatment and early diagnosis. Materials and Methods: Retrospective analysis of the clinical diagnosis of dyskinetic cerebral palsy patients and normal volunteers 20 cases, respectively, observed the change of dyskinetic cerebral palsy patients with bilateral posterior corticospinal motor area of cerebral blood flow, cerebral blood flow analysis of local motion area. t test was used to analyze the cerebral blood flow of bilateral cerebral blood flow in volunteers, children, volunteers and children. Results: There were significant differences in local cerebral blood flow and corticospinal motor area volunteers dyskinetic cerebral palsy patients with left and right sides of the posterior limb of the internal capsule (P＜0.05), left cerebral blood flow was higher than right. There was significant differences in cerebral blood flow between the left and right side of the patients with cerebral palsy (P＜0.05). Conclusions: The function of motor area of cerebral blood flow to reduce the bilateral posterior limb of the internal capsule which is one of the basic functions of pathological dyskinetic cerebral palsy movement area, can make quantitative analysis on the blood flow through magnetic resonance pCASL technique of dyskinetic cerebral palsy movement area analysis.]]></description>
<pubDate>Sat,20 May 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[MRI T staging of nasopharyngeal carcinoma involving the fascial spaces of suprahyoid neck]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.05.003</link>
<description><![CDATA[Objective:  To investigate the general invasiveness laws of  nasopharyngeal carcinoma (NPC) for fascial spaces of suprahyoid neck and its relationship with T staging by using MRI examination. Materials and Methods: A retrospective analysis of 200 cases of newly diagnosed patients with NPC confirmed by pathology was performed at Guizhou Provincial People's Hospital from July 2013 to March 2016. All the patients underwent plain and enhanced MRI examination. Neoplasm involving the fascial spaces of suprahyoid neck and its relationship with T staging were performed by two experienced radiologists according to the newly revised clinical staging form "2008 staging of NPC" by China Work Committee of NPC. Results: (1) The frequency of neoplasm involving the fascial spaces of suprahyoid neck were the following: pharyngeal mucosa gap (200 cases), parapharyngeal space (180 cases), chewing gap (139 cases), retropharyngeal space (125 cases), vertebral round gap (119 cases), carotid space (57 cases), parotid space (14 cases), submandibular space (two cases), cheek gap (1 case). Tumors involving the fascial spaces of suprahyoid neck were found to be: invasiveness of lateral parapharyngeal space was more than that of rear retropharyngeal space, invasiveness of rear retropharyngeal space was more than that of lateral to the rear of the carotid space, and invasiveness of bilateral was more than that of unilateral infiltration. (2) Eight cases (4.0%) of NPC were T1 stage and tumors confined to the pharyngeal mucosa gap. Thirty-four cases (17.0%) of tumors, among them 64.7% (22/34) were T2 stage and brokethrough the pharyngobasilar fascia and extent to the parapharyngeal space. Sixty-one cases (30.5%) of tumors were T3 stage, and the frequency of neoplasm involving the fascial spaces of suprahyoid neck were found to be: pharyngeal mucosa gap/ parapharyngeal space 100% (61/61), retropharyngeal space 77.0% (47/ 61), chewing gap 68.9% (42/ 61), vertebral week gap 67.2% (41/ 61), carotid space 37.7% (23/ 61). No neoplasm invasiveness was found in the submandibular space, parotid space, cheek and neckgap. Ninety-seven cases (48.5%) of patients were T4 stage and the frequency of neoplasm invasiveness were found to be: pharyngeal mucosa clearance/ swallow next to the gap/chewing gap of 100% (97/97), retropharyngeal space 80.4% (78 /97), vertebral week gap 76.3% (74 /97), carotid space 35.1% (34/97), parotid gap of 14.4% (14/97), lower jaw gap 2.1% (2/97), cheek gap of 1.0% (1/97). No neoplasm invasiveness was found in the rear neck gap. (3) The unilateral and bilateral invasion of the nasopharyngeal carcinoma to the surrounding space: 30.2% (58/192), 69.8% (134/192). Conclusions: Nasopharyngeal carcinoma has an attribute of involving various fascial spaces of suprahyoid neck. Parapharyngeal spaces invasiveness were found to be the highest one, and the posterior cervical space were found to be the only free space of invasiveness. Tumor involving the fascial spaces of suprahyoid neck may be summerized as:invasiveness of lateral spacesis more than that of posterior spaces, and followed by lateral to rear spaces, and bilateral space invasiveness is more than unilateral infiltration.]]></description>
<pubDate>Sat,20 May 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Feasibility study of hepatobiliary-specific contrast agent Gd-EOB-DTPA-enhanced MRI in evaluating liver function of patients with primary biliary cholangitis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.05.004</link>
<description><![CDATA[Objective: To study the feasibility of evaluating the liver function of patients with primary biliary cholangitis (PBC) by hepatocyte-specific contrast agent Gd-EOB-DTPA-enhanced MRI. Materials and Methods: A total of 50 subjects were enrolled in this study, of which 25 were PBC patients (group A), and 25 were other causes of cirrhosis patients (group B). Following intravenous injection of Gd-EOB-DTPA, the average relative signal enhancement (RE) of the liver at 4 min, 20 min and 50 min, and the contrast to noise ratio (CNR) of the common bile duct at 50 min on MRI were measured and calculated. The RE and CNR values between any Child-Pugh classes in group A were compared. The RE of the liver (20 min) and CNR of the common bile duct (50 min) in the same Child-Pugh class were compared between group A and group B. Results: RE of the live at 4 min, 20 min and 50 min, and CNR of the common bile duct at 50 min decreased with an increase of Child-Pugh class of the liver function in group A (P＜0.05). No significant difference (P＞0.05) was detected between group A and group B in the same Child-Pugh class with respect to RE of the liver (20 min) and CNR of the common bile duct (50 min). This indicated that RE of the live and CNR of the common bile duct could be related mainly to the liver function, and perhaps minimally to the cholestasis and/or excretion dysfunction of intrahepatic small bile ducts. Conclusions: Gd-EOB-DTPA-enhanced MRI may aid in comprehensive assessment of the liver function in patients with PBC.]]></description>
<pubDate>Sat,20 May 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[MRI findings of primary hepatic neuroendocrine tumors: correlation with pathology]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.05.005</link>
<description><![CDATA[Objective: To investigate MR imaging findings of primary hepatic neuroendocrine tumors (PHNETs) and their correlation with the 2010 WHO pathological classification. Materials and Methods: We analyzed MRI imagings of 6 patients who were diagnosed with PHNET and correlated the data with the 2010 WHO classification of neuroendocrine tumors. Results: According to the 2010 WHO classification system, 1 case was defined as G1, 3 cases were defined as G2, and 2 cases were defined as G3. The Grade 1 tumor was singular, solid nodules with prolonged enhancement from the arterial phase to the delayed phase. The lesion showed hypointensity on T1-weighted imaging, mildy high intensity on T2-weighted and homogeneous. The tumor cell arranged in a beam, and blood sinus was abundant. Grade 2 tumors could have a singular or multiple distribution pattern, signal intensities were heterogeneous on T1-and T2-weighted imaging with hemorrhage and necrosis. The tumor showed marked peripheral enhancement in the arterial phase and slight hyper-intensity relatived to the surrounding liver parenchyma in the delayed phase. Grade 3 tumors had multiple lesions, internal necrosis or coagulation necrosis, which showed the slight and prolonged enhancement from the arterial phase to the delayed phase. HE staining of the tumor showed tumor cell arranged as solid nests, and blood sinus was mildly abundant. Conclusions: MRI can reflect pathological features of PHNETs, which are helpful in accurately diagnosing PHNETs.]]></description>
<pubDate>Sat,20 May 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Rectal cancer on MRI diffusion-kurtosis imaging and correlation between DKI parameters and D2-40, CD31, S-100 and Ki-67 in rectal tumors]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.05.006</link>
<description><![CDATA[Objective: To evaluate the potential association between DKI parameters and D2-40, CD31, S-100 and Ki-67 with immunohistochemical analysis of rectal cancer. Materials and Methods: Data from 69 patients who were confirmed by surgical pathology from January to September in 2016. All cases were performed by regular sequence and DKI and DTI (diffusion tensor imaging) examination. The following parameters were acquired from the entire tumors. Respectively as Dax, Dmean, Drad, Fa, Kax, Kmean, Krad. D2-40, CD31, S-100 and Ki-67 were detected by Ben CHMARK-XT machine and Mul-timer system. D2-40 and CD31 were divided into two groups according to the expression of positive or negative and independent-sample t test was used for statistical analysis. Receiver operating characteristic curves and Pearson correlation were used for statistical analysis. Results: The levels of MK, K⊥ value in D2-40, CD31 positive group were significant higher than negative group. The differences were statistically significant (P＜0.05). Whereas MD in D2-40, CD31, positive group were significantly lower than negative group, the differences were statistically significant (P＜0.05). Pearson correlation analysis showed Ki-67 was significant positive correlation with MK, K⊥, K// parameters, whereas Ki-67 showed negative correlation with D⊥, D//, MD. ROC curve was applied to analysis of DKI parameters in D2-40, CD31 positive group and negative group. Conclusions: MK can reflect the tissue microenvironment including its component organelles, cell membranes, and water compartments, maybe preoperative noninvasive assessment of D2-40, CD31, S-100 and Ki-67 expression level, indirectly reflect the degree of tumor cell proliferation, provide a reference for colorectal malignant degree and prognosis of preoperative evaluation basis.]]></description>
<pubDate>Sat,20 May 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[The value of 3.0 T high-spatial-resolution MRI in the fistula classification and internal opening location]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.05.007</link>
<description><![CDATA[Objective: To evaluate the value of 3.0 T high-spatial-resolution MR imaging in the fistula classification and internal opening location. Materials and Methods: One hundred and fifty-six patients with anal fistulas underwent 3.0 T high-spatial-resolution MR imaging, and two experienced radiologists analyzed the images separatedly to identify the orientation of the fistula track, the internal opening, whether with ramifications and abscess, and the relationship between the primary track and the anal sphincter, compared with the surgical exploration. All cases were classified according to Parks classification, and the internal openings were expressed by lithotomy position of clock location method. MR imaging was correctly revealed if the internal opening was observed in the same quadrant as the surgical exploration. Results: (1) The coincidence rate was 100% of the classification according to the primary track on MR imaging, compared with surgical exploration in 156 cases: 119 samples and 37 complex anal fistula. The accuracy rates of classification by MR imaging compared with surgical exploration were: inter-sphincteric 97.70% (87/85), trans-sphincteric 96.30% (52/54), supra-sphincteric 90.90% (10/11), extra-sphincteric 85.71% (7/6), respectively. (2) The accuracy rate of internal opening was 92.20% (189/205). (3) 196/198 primary tracks and 20/24 ramifications were identified, the accuracy rate was more than 80%. (4) Seventy-four perianal abscess were confirmed by MRI as well as surgical exploration, the accuracy was equal to 100%. Conclusions: 3.0 T high-spatial-resolution MR imaging and dynamic contrast enhancement scanning has an important clincal value in evaluating the fistula classification and internal opening location.]]></description>
<pubDate>Sat,20 May 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Value of DWI in differential diagnosis of uterine empyema and uterine cavity fluid]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.05.008</link>
<description><![CDATA[Objective: To investigate the value of DWI sequence in the differential diagnosis of uterine empyema and uterine cavity fluid. Materials and Methods: Forty-four cases of DWI signal of uterine empyema and uterine cavity fluid were retrospectively analyzed, these cases were confirmed by pathology or clinic. Afterwards the apparent diffusion coefficient (ADC) was measured and the receiver operating characteristic (ROC) curve of the ADC value was drawn. Results: In DWI, 20 cases of uterine empyema, 18 cases showed high signal, 1 case  showed inhomogeneous high signal, 1 case showed low signal, mean ADC value was (0.78±0.21)×10-3 mm2/s. In DWI, 24 cases of uterine cavity fluid, 22 cases showed low signal, 2 cases showed high signal, mean ADC value was (1.81±0.38)×10-3 mm2/s. There was significant difference in ADC value between the two groups (P＜0.001), the optimum cutoff point for ADC values was 1.20×10-3 mm2/s, the sensitivity was 91.7% and the specificity was 95.0%. Conclusions: The ADC value can be used to identify the uterine empyema and uterine cavity fluid, and the cutoff value was 1.20×10-3 mm2/s.]]></description>
<pubDate>Sat,20 May 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Imaging findings of ovarian sertoli-leydig cell tumors：three cases and literature review]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.05.009</link>
<description><![CDATA[Objective: To evaluate the clinical and imaging features of ovarian Sertoli-Leydig cell tumors (SLCTs) to improve the understanding and diagnosis accuracy of this kind of tumor. Materials and Methods: Retrospectively studied the images and clinical data of three ovarian SLCTs which confirmed by pathology and evaluated the relationship between imaging features and clinical information. Results: We totally find three tumors in three patients (17 ys, 71 ys and 58 ys), two on the left ovary and the other on the right side. All the tumors have the appearance of solid mass or solid and cystic mass with clear margin. The solid part of the tumor shows isointensity or slightly high intensity on T2WI and hypointensity on T1WI while the cystic part inner the solid lesion shows hyper intensity on both T2WI and DWI. After contrast, the solid part shows obvious enhancement. Two of three patients show elevated testosterone and present with symptoms of masculinization. Conclusions: There are some specific imaging features of ovarian SLCTs. According to clinical history, ovarian tumors with solid or main solid components which show isointensity or slightly high intensity on T2WI should be considered to the diagnosis of SLCTs.]]></description>
<pubDate>Sat,20 May 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Construction of the probability map of the human deep brain nuclei by quantitative susceptibility mapping]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.05.010</link>
<description><![CDATA[Objective: Based on quantitative susceptibility mapping (QSM) technique, an auto-segment probabilistic atlas for the gray matter nuclei in deep brain was established in the present study. Materials and Methods: The QSM data from 15 healthy subjects were acquired on a clinical 3.0 T MRI scanner with a 12 channel matrix head coil. Ten subjects were randomly selected to create a gray matter nuclei atlas of the deep brain, and the remained five subjects were used to evaluate the effectiveness of the atlas. Specifically, the regions of interest (ROI) in six bilateral structures drawn manually by two raters were used as the gold standard, meanwhile, these corresponding ROIs were automatically segmented by three kinds of atlas. To assess the accuracy of proposed segment approach, the probabilistic atlas was compared with both AAL and Johns Hopkins atlas by calculating the Dice coefficient and the susceptibility values in the auto-segment and manual-segment ROIs, respectively. Results: The Dice coefficient in our probability atlas was significantly higher than the AAL in the basal ganglia region and the Johns Hopkins atlas in the skull base and cerebellum, respectively. Moreover, the susceptibility values in our probability atlas were more closer to that of manual segment region compared with the other two atlases. Conclusions: The probability atlas based on the QSM images is more reliable than both AAL and Johns Hopkins atlas in the segment of gray matter nuclei of deep brain. This atlas may be effective to improve the efficiency of image analysis in the clinical research.]]></description>
<pubDate>Sat,20 May 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Initial application of fractional motion model in brain of anomalous diffusion]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.05.011</link>
<description><![CDATA[dMRI has been widely used in clinic, which is the only noninvasive method to research the diffusion processes in living tissue currently. The theory of traditional dMRI was based on the Brownian motion model, however, research has showed that the diffusion processes in crowded environments of biological cells are non-Brownian, also referred to as "anomalous diffusion". Several models have been proposed to explain anomalous diffusion phenomena in vivo and the fractional motion (FM) model is considered more appropriately among them. The model can not only reflect the anomalous diffusion of molecules in tissues but also provide rich information of subtle changes in organizational structure with its multiparameter (α, β, μ, H), thus guiding for disease diagnosis, treatment and prognosis. This article is aimed to review the imaging mechanism of  FM model and initial application of FM model in brain of anomalous diffusion.]]></description>
<pubDate>Sat,20 May 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Technical advances and clinical applications of territorial arterial spin labeling]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.05.012</link>
<description><![CDATA[To know the exact cerebral perfusion territory supplied by individual cerebral artery is of great significance to the diagnosis and treatment of many cerebrovascular diseases. On the basis of arterial spin labeling MRI techniques, territorial arterial spin labeling (t-ASL) using different technology methods to selectively label individual cerebral artery and then to obtain the cerebral perfusion territories mapping. Besides, since t-ASL has the advantages of no contrast agents and non-ionizing radiation, it has wide application foreground. This review provides an overview of the development and different technical principles of territorial ASL techniques, and summarizes its clinical applications.]]></description>
<pubDate>Sat,20 May 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Research status of ASL perfusion imaging and dynamic contrast-enhanced MRI in the periphery of gliomas]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.05.013</link>
<description><![CDATA[Glioma is a common intracranial primary tumor. Glioma has invasive growth, and it is important to correctly determine the boundary of the tumor to guide surgery and determine the postoperative radiotherapy boundaries. With the development of magnetic resonance perfusion imaging, ASL can be a noninvasive perfusion MR method for evaluation of the MVD of brain gliomas. Dynamic contrast-enhanced MRI (DCE-MRI) is a useful way to evaluate the angiogenesis of glioma. In recent years, their furthers in the periphery of gliomas have become a hot spot. In this paper, we made a review from the aspects of DCE-MRI and ASL perfusion imaging in the periphery of gliomas.]]></description>
<pubDate>Sat,20 May 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Advances of quantitative dynamic contrast -enhanced MRI in rectal cancer]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.05.014</link>
<description><![CDATA[Angiogenesis is an important factor of the genesis, progression and metastasis of rectal cancer. With low-molecular-weight gadolinium contrast agents, dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) can be used to evaluate the vascular characteristics non-invasively. Using fast T1-weighted imaging to continuously scan the region of interest, the time-signal intensity curve of the pixel in the region of interest was obtained. And the time-signal intensity curve was analyzed by using the pharmacokinetic model to calculate the perfusion parameters of rectal cancer, such as Ktrans, Ve, Kep, which can reflect the microcirculation permeability of the tissue or lesion of the region of interest. The basic principles of DCE-MRI,  the advance in the research of the diagnosis, the classification and staging of rectal cancer with DCE-MRI at home and abroad are reviewed in the present paper.]]></description>
<pubDate>Sat,20 May 2017 00:00:00  GMT</pubDate>
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<title><![CDATA[Present situation and new progresses in magnetic resonance imaging of prostate cancer]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2017.05.015</link>
<description><![CDATA[Magnetic resonance imaging (MRI) is accepted as the best imaging modalities for the early detecting of prostate cancer. Along with the development in magnetic resonance technique, several kinds of functional magnetic resonance imaging techniques, such as intravoxel incoherent motion diffusion-weighted imaging (IVIM-DWI), diffusion tensor imaging (DTI), diffusion kurtosis imaging (DKI), magnetic resonance spectroscopy (MRS), perfusion weighted imaging (PWI), have been invented and applied to clinical diagnosis, providing more imaging evidence for the early diagnosis of prostate cancer and clinical individualized treatment. With the deepening of research, development of multi center and large sample study, and further optimization of scanning parameters, multi-parameter MRI will play a more and more important role in the early diagnosis of prostate cancer.]]></description>
<pubDate>Sat,20 May 2017 00:00:00  GMT</pubDate>
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