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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=201903</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
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<title><![CDATA[Functional magnetic resonance imaging study on the effects of 
craving task on large-scale brain networks in heroin addicts]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.03.001</link>
<description><![CDATA[Objective: To investigate the changes of subjective craving and characteristics of large-scale brain networks in heroin addicts during the drug cues task. Materials and Methods: Twenty-one heroin addicts and 33 healthy subjects matched by age, sex and education level were included in this study. Analysis of imaging and behavioral difference were carried out with Matlab, SPM8, DPABI and SPSS 20.0 software. The templates of task-negative network and task positive network were obtained from the resting state functional magnetic resonance data, and the differences in drug cue induced brain response within these networks were analyzed, and then the correlation analysis with psychological behavior was performed. Results: The craving score of heroin addicts after stimulation of drug cues was significantly higher than that of before the task (t=1.19, P=0.00), but no significant difference was found in normal control group (t=0.031, P=0.75). Compared with the normal group, the heroin addicts showed higher activation of task negative network (default mode network) and task positive network (salient network, executive control network, higher vision network, visuospatial network, basal ganlia) (P＜0.05, AphaSim corrected). However, the response of primary visual network in task-positive network was lower in heroin addiction group relative to normal control group (P＜0.05, AphaSim corrected). Controlling the head movement factor, the activation of basal nuclei in heroin addicts was positively correlated with the craving score after drug cue exposure (r=0.56, P=0.01). Conclusions: The large-scale brain networks of heroin addicts is commonly abnormal when exposed to drug related cues.
Craving task on large-scale brain networks in heroin addicts]]></description>
<pubDate>Wed,20 Mar 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Evaluation of the relations between middle cerebral artery plaque 
characteristics and ischemic stroke and transient ischemic attack: 
three-dimensional high-resolution magnetic resonance imaging]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.03.002</link>
<description><![CDATA[Objective: To analyze the relations between middle cerebral artery plaque characteristics and ischemic stroke and transient ischemic attack by 3D turbo spin echo sequence. Materials and Methods: A retrospective analysis was performed on 58 patients with middle cerebral artery stenosis. All patients underwent routine MRI and pre- and post-contrast 3D turbo spin echo sequence (3D-SPACE) images at 3.0 T MRI. Patients were divided into ischemic stroke group and transient ischemic attack group according to the high signal in the blood supply area of middle cerebral artery on diffusion-weighted imaging. The stenosis rate, eccentricity index, degree of plaque enhancement and remodeling index were quantitatively analyzed, and the degree of plaque enhancement and remodeling were qualitatively measured. Analyzed the relations between middle cerebral artery plaque characteristics and ischemic stroke and transient ischemic attack. Results: Twenty-two ischemic stroke and 36 transient ischemic attack were analyzed. The eccentricity index and remodeling index of ischemic stroke were significantly higher than those in transient ischemic attack (eccentricity index: 0.701±0.099 vs. 0.559±0.208, P=0.001; remodeling index: 0.922±0.194 vs. 0.761±0.182, P=0.003; contrast enhancement: 131±44 vs. 94±38, P=0.002). There was no statistically significant difference in stenosis rate between the two groups. Conclusions: The characteristics of middle cerebral artery plaque detected by 3D turbo spin echo sequence can effectively predict the occurrence of stroke.]]></description>
<pubDate>Wed,20 Mar 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Effects of chemotherapy on brain activity in resting state and 
cognitive function in breast cancer patients]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.03.003</link>
<description><![CDATA[Objective: To evaluate the effects of chemotherapy on brain activity in resting state and cognitive function in breast cancer patients. Materials and Methods: Twenty-one breast cancer patients 3—4 weeks after surgery were recruited with mean age (50.14±13.12) years. Neuropsychological assessments and MRI data acquisition took place before(t1) and one months after chemotherapy(t2). Imaging data were obtained using a 3.0 T MRI scanner (verio, siemens, Germany), with a 8-channel receiver head coil. Rs-fMRI data were analyzed using DPARSF software by means of amplitude of low frequency fluctuation (ALFF). All statistics were performed with IBM SPSS 17.0. Paired-t test and pearson correlation analysis were used. Results: The MoCA scores of the breast cancer patients were not significantly changed one month after chemotherapy (t2) compared with the scores before (t1). The Stroop word test and Stroop interference test scores increased significantly at t2 compared with those at t1. The auditory verbal learning test 5 minutes delayed scores and the digital span backward test scores decreased significantly at t2 compared with those at t1.The ALLF values in the left inf-temporal gyri, right mid-temporal gyri, left mid-sup-temporal gyri and bilateral precuneus lobe increased significantly at t2 compared with those at t1. Conclusions: The executive, attention and memory functions declined after chemotherapy in breast cancer patients. The rs-fMRI showed increased activities in some DMN brain areas.]]></description>
<pubDate>Wed,20 Mar 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Disparity of brain regional homogeneity and the correlation 
research of its mental characteristics in methamphetamine and 
heroin use disorder patients]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.03.004</link>
<description><![CDATA[Objective: To analyze the differences of brain local neuronal spontaneous activity of methamphetamine and heroin used disorder patients and its relevance to psychoethology. From the perspective of changes in brain activity caused by methamphetamine and heroin used disorder, to explore the underlying neural mechanism that leads to different mental conditions. Materials and Methods: Twenty-one male methamphetamine use disorder (MAUD), 21 demography matched heroin use disorder (HUD) and normal controls (NC) participants in this study. All MR imaging were acquired using an eight-channel head coil on a 3.0 T GE-Signa MRI scanner. Psychological situation was evaluated by the Self-reporting Inventory-90 (SCL-90). ReHo values were calculated and difference among three groups was analyzed by one-way analysis of variance (ANOVA). The relationship between brain regions and psychological symptoms was performed with total brain voxel-wise analytical method in MAUD group. Results: Two-two comparison between the three groups showed MAUD group showed higher levels of anxiety, hostility, stubborn and core psychotic compared with NC group. Additionally, those in the MAUD group had higher scores of hostility compared with HA group (P＜0.05). There was no significant difference between HUD group and NC group. The ReHo values of multiple brain regions between the three groups were different and the brain regions were right cerebellum, right frontal middle gyrus, right putamen, right inferior temporal gyrus, left frontal super gyrus, left parietal inferior gyrus, left thalamus and left fusiform (P＜0.001). Compared with the NC group, the MAUD group demonstrated significantly increased ReHo values in right frontal middle gyrus and right inferior temporal gyrus, significantly decreased in right cerebellum, left frontal super gyrus and right putamen. The HUD group demonstrated significantly increased ReHo values in right frontal middle gyrus, significantly decreased in left thalamus, left fusiform, right putamen and left parietal inferior gyrus. On same uptake drug time, compared with the HUD group, the MAUD group demonstrated significantly decreased brain regional homogeneity in resting-state of cerebellum and left frontal super gyrus, but increased in right frontal middle gyrus, right inferior temporal gyrus and left thalamus. In MAUD group, there is no correlation between total brain and psychological scale. Conclusions: Compared with HUD group, MAUD group was more damaging to the mood-regulation, auditory-related and memory-related brain regions. It may be the underlying pathological basis for the occurrence of its special mental symptoms.]]></description>
<pubDate>Wed,20 Mar 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Diagnostic value of  MRI and diffusion tensor imaging in full-term 
neonates with hypoxic ischemic encephalopathy]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.03.005</link>
<description><![CDATA[Objective: To discuss the value of  the quantitative determination of  FA value and ADC value in the brain injury assessment on full-term neonates with HIE. Materials and Methods: From December 2016 to December 2017, 41 full-term neonates with HIE in our hospital were examined by conventional MRI and DTI. Another 10 normal full-term neonates were taken as control group. ADC/FA values were calculated in bilateral posterior limb of internal capsule (PLIC), genu of corpus callosum (GCC), splenium of corpus callosum (SCC), frontal white matter (FWM), occipital white matter (OWM), central centrum semiovale (CCS) and lentiform nucleus (LN), and were compared between control group and HIE group. The correlation between FA values and NBNA scores were analyzed, and the diagnostic accuracy of HIE was evaluated. Results: On convention MRI, PLIC, basal ganglia and thalamus lesions were only seen in moderate/severe HIE (P＜0.05). Except for GCC and SCC , there was no difference in the ADC value and FA value between the left and right sides of the same ROI (P＞0.05). The ADC values of  FWM in moderate HIE and severe HIE except LN and FA values of moderate/severe HIE except LN were lower than those of control group (P＜0.01). The ADC values and FA values of each ROI in mild HIE were similar to those in the control group (P＞0.05). There were significant differences in FA values in mild /moderate/severe HIE and ADC values in FWM, GCC, OWM and SCC between mild and moderate and severe groups (P＜0.05). Conclusions: The diagnostic veracity of FA value is superior to ADC value and conventional MRI in HIE. A significant positive correlation is found between FA value in PLIC and NBNA scores.]]></description>
<pubDate>Wed,20 Mar 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Value of BOLD-MRI for the evaluation of short-term chemoradiotherapy 
efficacy in nasopharyngeal carcinoma]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.03.006</link>
<description><![CDATA[Objective: To investigate the feasibility of blood oxygenation level-dependent MRI (BOLD-MRI) for evaluating short-term therapeutic effect of chemoradiotherapy in nasopharyngeal carcinoma (NPC). Materials and Methods: Forty-one cases with NPC confirmed by pathological biopsy exposed to the chemoradiotherapy being the induction chemotherapy (IC) followed by the concurrent chemoradiotherapy (CCRT) and adjuvant chemotherapy (AC) therapy. The conventional MRI was performed pre-IC and after CCRT + AC. They were used to measure the maximal length of the primary and metastatic tumors, and the diameter of the pathological lymph node, and then the regression rate of lesions was calculated for each patient. BOLD was performed pre- and post- IC, then the corresponding T2* value of tumor was measured (T2*baseline and T2*IC), respectively. According to the response evaluation criteria in solid tumors (Version 1.1), the patients were divided into the complete response (CR group) and not (non-CR) groups. The T stage, T2*baseline, and T2*IC were compared between the CR and non-CR groups. The correlation of the regression rate of tumor with the T stage, T2*baseline, and T2*IC was tested, respectively. The receiver operating characteristic curve (ROC) was used to compare the capacity of T stage, T2*baseline, and T2*IC in predicting complete response to the chemoradiotherapy for the cases with NPC. Results: T stage, T2*baseline, and T2*IC were statistically different between CR and non-CR groups (P＜0.05), and they showed a linear correlation with the regression rate of tumor (r=-0.481, 0.748, and 0.617, all P＜0.05). For predicting the complete response of the cases with NPC post-chemoradiotherapy, the area under ROC was 0.778, 0.903, and 0.763 for T stage, T2*baseline, and T2*IC, respectively (all P＜0.05). T2*baseline was the best one that can predict the complete response for the cases with NPC while it is larger than 37.5 ms (P＜0.05). Conclusions: The BOLD-based T2*baseline can predict the short-term chemoradiotherapy efficacy in NPC and can be used as a useful supplement to the conventional T stage.]]></description>
<pubDate>Wed,20 Mar 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Dynamic contrast-enhanced MR imaging in differentiating 
postobstructive pneumonitis and atelectasis from central lung carcinoma]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.03.007</link>
<description><![CDATA[Objective: To retrospectively evaluate dynamic contrast-enhanced MR imaging (DCE-MRI) for differentiating postobstructive pneumonitis and atelectasis from centrally located lung carcinomas, and to compare it with common MRI sequences and CT. Materials and Methods: Forty-four consecutive patients with central lung carcinoma proved pathologically between March 2017 to January 2018 were analyzed. All the patients underwent 3.0 T DCE-MRI, common MRI sequences and CT before treatment. MRI scan sequences were as followed, T1WI, T2WI, DWI and DCE-MRI. The detectability of different examines and sequences were statistically compared using χ2 test. The differences of signal intensity on DWI and ADC value between lung carcinomas and postobstructive pneumonitis and atelectasis were statistically compared using t test. Results: The detectability of CT, T1WI、T2WI、T2WI+DWI、 DCE-MRI、T2WI+DWI+DCE-MRI was statistically different (χ2=74.756, P=0.000). The detectability of DCE-MRI was the same as T2WI combined DWI (75.0%, 33/44), and higher than T1WI (13.6%, 6/44), T2WI (50.0%, 22/44) or CT alone (40.9%, 18/44), and the differences were statistically significant (χ2=33.570, 5.867, 10.493, respectively, P＜0.05). However, DCE-MRI can show the boundaryline clearer than T2WI combined DWI. The detectability can be the highest when DCE-MRI combined with T2WI and DWI (93.2%, 41/44). The mean signal intensity of lung carcinomas was higher than that of postobstructive pneumonitis and atelectasis on DWI images (P＜0.05). The mean ADC value of lung carcinomas was significantly lower than that of postobstructive pneumonitis and atelectasis (P＜0.05). Conclusions: DCE-MRI may be more useful than T1WI, T2WI and CT in differentiating postobstructive pneumonitis and atelectasis from central lung carcinoma, and it has more advantages for differential diagnosis when combined with T2WI and DWI.]]></description>
<pubDate>Wed,20 Mar 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Application of 3.0 T whole body diffusion-weighted imaging for 
the evaluation of tumor response to induction chemotherapy in 
patients with multiple myeloma]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.03.008</link>
<description><![CDATA[Objective: To investigate the feasibility of whole body diffusion-weighted imaging (WB-DWI) for the evaluation of response to induction chemotherapy in multiple myeloma (MM) patients. Materials and Methods: Fifty-four cases of MM patients (confirmed by pathology and hematologic laboratory analysis) were enrolled in this study between April 2016 and June 2018 at the First Affiliated Hospital of Soochow University, all of them underwent WB-DWI before and after induction chemotherapy. Quantitative ADC estimates were measured at the site of the lesions before and after chemotherapy. MM patients were divided into deep (complete response or very good partial response) and non-deep responders (partial response, minimal response, stable disease, or progressive disease) on the basis of M-proteins and light chains (serum and urine), and plasma cells from bone marrow biopsy measured at the time of diagnosis and at the end of induction treatment. And the percent variations in ADC were calculated and compared between deep responders and non-deep responders. Results: Among 54 cases, 35 patients were classified as deep-responders and 19 as non-deep responders. The ADC changes from baseline of deep responders were significantly higher than non-deep responders (0.68±0.39 vs 0.24±0.17×10-3 mm2/s, P＜0.01). The ADC percent variations from baseline were significantly higher in deep responders compared to those in non-deep responders at the end of induction chemotherapy (101.63% vs 39.32%, P＜0.01). The cut-off value of ADC percent variations for the diagnosis of deep response was 58.42%, the sensitivity and specificity was 91.4%, 89.5%, and the area under the ROC curve was 0.929. Conclusions: ADC change from WB-DWI MRI in MM patients who achieved deep response at the end of induction chemotherapy were significantly higher than those in patients who did not,which demonstrated that WB-DWI was a feasible diagnostic tool for the evaluation of response to induction chemotherapy in MM patients by quantifying ADC estimates before and after the treatment and could provide complementary information useful in monitoring therapy response.]]></description>
<pubDate>Wed,20 Mar 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Comparison of stretched-exponential model and mono-exponential 
model DWI in differentiation of prostate cancer and benign prostatic 
hyperplasia]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.03.009</link>
<description><![CDATA[Objective: To compare the value of stretched-exponential model and mono-exponential model diffusion weighted imaging (DWI) in the differentiation of prostate cancer (Pca) and benign prostatic hyperplasia (BPH). Materials and Methods: The data of DWI (b from 0 to 2000 s/mm2) of 61 Pca patients and 49 BPH patients confirmed by pathology were retrospectively analyzed. The parameters apparent diffusion coefficient (ADC), distributed diffusion coefficient (DDC) and α values of these lesions were calculated. All parameters were compared between Pca and BPH using independent-samples t test, and their diagnostic performance was analyzed by receiver operating characteristic (ROC) curves. Results: ADC, DDC and α values of Pca were (0.714±0.170)×10-3 mm2/s, (0.711±0.262)×10-3 mm2/s and 0.730±0.070, while of BPH were (1.139±0.163)×10-3 mm2/s, (1.435±0.267)×10-3 mm2/s and 0.766±0.067. All parameters in Pca were significantly lower than those in BPH (P＜0.01). The area under the curves (AUCs) of DDC and ADC were 0.955 and 0.950, with no significant difference (P＞0.05). The AUC in α was significantly lower than ADC and DDC (P＜0.05). The ADC and DDC values of prostate cancer were negatively correlated to the Gleason scores (P＜0.05). Conclusions: DDC derived from stretched-exponential model DWI can be used in differentiation of Pca and BPH. The stretched-exponential model was not superior to the mono-exponential model.]]></description>
<pubDate>Wed,20 Mar 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Progress in the application of magnetic resonance multi-sequence 
diagnosis to evaluate acute myocardial infarction]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.03.011</link>
<description><![CDATA[Cardiovascular magnetic resonance technology provides a non-invasive method for understanding cardiac structure and function, with high diagnostic accuracy and no ionizing radiation. Delayed imaging with perfusion enhancement technology provides valuable diagnostic and prognostic information for myocardial infarction. However, the degree of myocardial infarction and diffuse changes in the heart cannot be accurately evaluated. T1 mapping technology is a new technique for quantitative assessment of myocardial limitations and diffuse lesions. It can quantitatively assess the extent of myocardial infarction and the area of myocardial edema. It has good diagnostic and prognostic value ,it has better application prospects in clinical practices.]]></description>
<pubDate>Wed,20 Mar 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Advances of functional magnetic resonance imaging in application 
of tumor treatment outcome after radiotherapy or chemotherapy]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.03.012</link>
<description><![CDATA[The morbidity of malignant tumor is currently ascending with years worldwide. The accurate tumor treatment outcome after radiotherapy or chemotherapy is significantly correlating to the treatment planning. Functional magnetic resonance imaging can provide functional and metabolic information of the tumor tissue without invasion, possessing superior application value in tumor treatment outcome. Nevertheless, different sequences have different advantages and deficiencies respectively. This review is aimed to introduce the advances of multiple sequences in application of tumor treatment outcome so as to better applying it into clinic.]]></description>
<pubDate>Wed,20 Mar 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Present research situation of the MRI manifastations of spinal 
infection and its imitations]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.03.013</link>
<description><![CDATA[The incidence and diagnostic rate of spinal infection are increasing year by year, but because of the occult onset and non-specificity manifestation, there is always a long delay period before clinical diagnosis, which leads to the high mortality. Magnetic resonance imaging (MRI) plays an important role in the diagnosis of spinal infection. The purpose of this paper is to improve the understanding and differential diagnosis of MRI features by introducing the clinical pathophysiological process of spinal infection, in order to achieve early diagnosis and improve long-term outcomes and prevent permanent neurologic deficits.]]></description>
<pubDate>Wed,20 Mar 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Research progresses in imaging of charcot neuropathic 
osteoarthropathy in diabetic foot]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.03.014</link>
<description><![CDATA[Charcot neuropathic osteoarthropathy (CN) is a chronic, progressive disease of bones, joints, and soft tissues. The disease usually occurrs in the foot and ankle as a result of diabetic peripheral neuropathy. Due to gross instability, recurrent ulcerations, it is a deforming and destructive disease process. Early diagnosis and differentiation CN from osteomyelitis are critical to guide treatment. It can exist concomitantly with osteomyelitis, typically in the setting of an advanced midfoot ulcer. Conventional examination methods often yield inconclusive or confusing data. Various advanced MR imaging protocols not only may improve the diagnostic accuracy of MR imaging and the ability of differenting CN from osteomyelitis, but also may help in making treatment decision and lead to improving patient outcomes. We aim to make a review about the recent imaging research progress in CN.]]></description>
<pubDate>Wed,20 Mar 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Advances in imaging research of diabetes-related sarcopenia]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.03.015</link>
<description><![CDATA[Sarcopenia is a geriatric syndrome characterized by the decline of skeletal muscle mass and function, and it is also one kind of chronic complications of diabetes mellitus which can lead to a series of adverse health consequences. Early identification of diabetes-related sarcopenia is of great significance in preventing disease progression and ensuring the quality of life, and imaging techniques have shown great clinical value for the evaluation of muscle mass change in the early stage of sarcopenia. This article mainly discusses the value and characteristics of different imaging techniques in the evaluation of diabetes-related sarcopenia.]]></description>
<pubDate>Wed,20 Mar 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[The latest development of multi-parametric magnetic resonance 
imaging assisted fusion puncture of prostate]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.03.016</link>
<description><![CDATA[Currently, the European Urology Association uses multi-parametric magnetic resonance imaging (mp-MRI) as a diagnostic basis for prostate tumors,its diagnostic grade is Ia. And MP-MRI can be combined with other evidence for the diagnosis of prostate tumors.The gold standard for the diagnosis of prostate tumors lies in histopathology, which is particularly important for obtaining pathological diagnosis and is more instructive for the next step of clinical treatment. With the development of biopsy, MRI, fusion puncture and computer technology, the involvement of mp-MRI guided prostate fusion puncture has also gained new development and wider clinical application. This paper reviews recent advances in the diagnosis of prostate tumors, including the application of mp-MRI technology and the aided direct fusion puncture, cognitive fusion targeted biopsy (COG - TB) and software fusion targeted biopsy (FUS-TB).]]></description>
<pubDate>Wed,20 Mar 2019 00:00:00  GMT</pubDate>
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