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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=201912</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
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<title><![CDATA[The relationship between plaque characteristics of intracranial artery stenosis and ischemic stroke]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.12.001</link>
<description><![CDATA[Objective: To investigate the relationship between plaque characteristics of patients with intracranial atherosclerotic stenosis and ischemic stroke. Materials and Methods: The plaques of 44 patients with intracranial atherosclerotic stenosis examined by high resolution magnetic resonance imaging (HR-MRI) were retrospectively analyzed. According to 3D-TOF MRA images to analyze the degree of stenosis, the patients were divided into mild stenosis group, moderate stenosis group and severe stenosis group according to the degree of stenosis. According to whether the plaques caused ischemic stroke and the time of ischemic stroke from HR-MRI examination, the plaques were divided into acute/subacute phase responsible plaque group, chronic phase responsible plaque group, and non-responsible plaque group.The risk factors of atherosclerosis and plaque characteristics (stenosis degree and plaque enhancement degree) were compared among the three group. Results: Among 44 patients, 29 were responsible plaques in acute/subacute phase, 20 were responsible plaques in chronic phase and 17 were non-responsible plaques. There were significant differences in the degree of lumen stenosis and plaque enhancement between the acute/subacute responsible plaque group, the chronic responsible plaque group and the non-responsible plaque group (P＜0.05). However, there were no statistically significant risk factors for atherosclerosis in the three groups. Conclusions: The degree of plaque enhancement and the degree of stenosis in patients with intracranial atherosclerotic stenosis are correlated with the occurrence of ischemic stroke. The plaques that are obviously strengthened and severely stenosis of the lumen are less stable and more prone to occur ischemic stroke.]]></description>
<pubDate>Fri,20 Dec 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[The study of regional homogeneity and voxel-mirrored homotopic connectivity of minimal hepatic encephalopathy disease at resting-state fMRI]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.12.002</link>
<description><![CDATA[Objective: Resting brain function MRI technique was used to investigate the abnormal changes of regional cerebral functional activity, functional connection between symmetrical alleles in bilateral cerebral hemispheres and synchronization of neuroactivity in patients with minimal hepatic encephalopathy (MHE) in resting state. In order to provide a reliable imaging basis for the occurrence and development of MHE. Materials and Methods: Bring into 20 patients (13 males and 7 females, mean age 51.6±4.7 years) with MHE diagnosed by neuropsychological test in our hospital were enrolled in this study. The average age was 48.2±5.5 years old, and 20 cases (14 males and 6 females) were included in the healthy control group. Structural imaging (T1-MPRAGE) and blood oxygen level dependent functional magnetic resonance imaging (BOLD-fMRI) were performed with Siemens 3.0 T MR in both groups. The scanned images of all subjects were preprocessed and analyzed by regional homogeneity (ReHo) and voxel-mirrored homotopic connectivity (VMHC) using the statistical tools of DPASF 4.3 software package on Matlab 2013b platform. Statistical analysis was used to compare the difference of regional brain function between MHE patients and healthy controls at rest and the synergetic changes between bilateral cerebral hemispheric allelic voxels. Results: Compared with HC group, the brain areas with decreased ReHo value in MHE group included superior frontal gyrus and middle frontal gyrus, and those in MHE group included bilateral superior frontal gyrus and medial frontal gyrus. Middle temporal gyrus, lingual gyrus, anterior cingulate gyrus, cerebellar hemispherical, tegmental and pons (voxel level, P＜0.05, corrected by FDR). Conclusions: In resting state, ReHo and VMHC can be used to analyze the changes of brain network function in patients with MHE in a more comprehensive way. At the same time, it provides a theoretical basis for explaining the clinical manifestations, pathophysiological changes and pathogenesis of MHE.]]></description>
<pubDate>Fri,20 Dec 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Assessing difference in brain function between heroin dependents after one year methadone maintenance treatment and protracted abstinence: A resting-state fMRI study]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.12.003</link>
<description><![CDATA[Objective: To investigate the difference in effect of one year protracted abstinence and the methadone maintenance treatment on brain function in heroin addicts. Materials and Methods: Seventeen heroin dependent patients during abstinence (PA group), 16 heroin dependent patients during methadone maintenance treatment (MMT group) and 35 healthy control group (HC group) were enrolled in this study. The resting-state data were collected by functional magnetic resonance scanning (fMRI). The intensity of local spontaneous brain activity in the three groups was calculated by the amplitude of low frequency fluctuation (ALFF) method. The variance analysis and post-event analysis were used to compare the changes of brain activity between PA group and MMT group. Results: There were significant differences in ALFF values in the right calcarine gyrus, the left superior cerebellar gyrus, the right medial superior frontal gyrus and the right supplementary motor area among the three groups. The brain activity in the calcarine gyrus and the supplementary motor area in the PA group was closer to the normal group. The ALFF value of the right medial frontal gyrus of the MMT group was negatively correlated with the methadone maintenance treatment time (month) (r= -0.67, P=0.004), and the right margin of the PA group was ALFF and the forced withdrawal time (month) was negatively correlated (r=-0.54, P=0.02). Conclusions: After one year of intervention, there are still abnormalities in some brain areas of heroin addicts in methadone maintenance therapy and protracted abstinence, but protracted abstinence may be more conducive to the recovery of brain function in heroin addicts.]]></description>
<pubDate>Fri,20 Dec 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Comparative study of T2 FLAIR enhancement sequence and T1WI-3D-TFE enhancement sequence in diagnosis of tuberculous meningitis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.12.004</link>
<description><![CDATA[Objective: A comparative study of the clinical value of T2 FLAIR enhancement sequence and T1WI-3D-TFE enhancement sequence in the diagnosis of tuberculous meningitis. Materials and Methods: Thirty-two patients with tuberculous meningitis were studied prospectively. After routine brain MRI scan, T1WI-3D-TFE enhanced scan was performed, and then T2 FLAIR enhanced scan was performed. The images were analyzed by two senior diagnostic doctors. To compare the display degree of T1WI-3D-TFE enhancement and T2 FLAIR enhancement on cerebral parenchymal and leptomeningeal lesions, statistical methods were used to test the two groups of binary data χ2, P＜0.05 was statistically significant. Results: T2 FLAIR enhancement showed 85.0% and 92.0% of the cerebral parenchymal and leptomeningeal lesions, and T1WI-3D-TFE enhancement showed 58.2% and 36.0% of the cerebral parenchymal and leptomeningeal lesions T2 FLAIR enhancement showed a higher display rate than T1WI-3D-TFE enhancement.Statistical results showed that T1WI-3D-TFE enhancement and T2 FLAIR enhancement showed significant differences in the degree of displaying cerebral parenchymal and leptomeningeal lesions.Conclusions: The clinical value of T2 FLAIR enhancement sequence in diagnosis of tuberculous meningitis is better than that of T1WI-3D-TFE enhancement sequence. T2 FLAIR enhancement sequence can better show the number and extent of brain parenchyma and leptomeningeal lesions.]]></description>
<pubDate>Fri,20 Dec 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Study of quantitative multiparametric CMR in the detection and monitoring of myocardial edema in fulminant myocarditis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.12.005</link>
<description><![CDATA[Objective: To assess quantitative multiparametric cardiac magnetic resonance (CMR) to detect and monitor inflammation myocardial injuries in fulminant myocarditis. Materials and Methods: 19 patients with clinical diagnosis of fulminant myocarditis underwent CMR examination at 3.0 T in the acute phase and at 3-months follow up. The control group consisted of 19 healthy volunteers. The CMR protocol included cine, black blood T2-weighted imaging, T1 mapping, T2 mapping and late gadolinium enhancement (LGE). Myocardial strain analysis was performed on routine cine images. Results: Compared with patients with acute fulminant myocarditis, native T1[1414(1357, 1459) vs 1267(1249,1298), P＜0.001], T2[47(43, 49) vs 39 (38, 43), P＜0.001] and ECV [0.36(0.32, 0.40) vs 0.29(0.26, 0.30), P＜0.001] were markedly reduced in the follow-up scan, but still elevated compared to healthy controls. Compared with the controls, strain indices were all significantly impaired in acute stage. Native T1 and T2 values led to excellent diagnostic accuracy for discriminating acute myocarditis from healed myocarditis, with AUC of 0.947 and 0.931. Conclusions: Quantitative multiarametric CMR can accurately detect and monitor inflammatory myocardial injuries in patients with fulminant myocarditis. Native T1 and T2 values achieved excellent diagnostic performance in distinguishing acute from healed myocarditis.]]></description>
<pubDate>Fri,20 Dec 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Quantitative assessment of MRI T1rho imaging for lumbar disc degeneration in the low back pian]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.12.006</link>
<description><![CDATA[Objective: To investigate the quantitative diagnostic value of MRI T1rho value in low back pain with lumbar intervertebral disc degeneration. Materials and Methods: Totally 38 low back pain patients and 28 asymptomatic volunteers underwent lumbar MRI examination. Lumbar sagittal T2WI and sagittal T1rho images were obtained. Pfirrmann grades of all lumbar discs were evaluated and T1rho values of nucleus pulposus (NP) were measured. The differences of T1rho values between the low back pain and volunteers at different disc levels of the lumbar disc were compared, and the correlation between T1rho values and Pfirrmann grades, age and BMI were analyzed. Results: Significant difference existed in NP T1rho values at different disc levels of the lumbar disc between the low back pain and volunteers (P＜0.01), and the T1rho values of L4/5 and L5/S1 disc were significantly lower than L1/2 and L2/3 disc in the low back pain (P＜0.05). The NP T1rho values of Pfirrmann Ⅰ-Ⅳ were (141.5±9.8) ms, (117.1±13.0) ms, (85.6±13.9) ms, (60.5±10.5) ms and the T1 rho value of lumbar disc had a negative correlation with Pfirrmann greeds (r=-0.86, P＜0.05), significant difference existed in T1rho values between each Pfirrmann grade (P＜0.01). The T1rho value of each lumbar disc in NP had a negative correlation with age and BMI (r=-0.63, P＜0.01 and r=-0.33, P＜0.01). Conclusions: MRI T1rho imaging is feasible to assess the degree of intervertebral disc degeneration in quantitative, and it has the clinic value in diagnosis of early intervertebral disc degeneration.]]></description>
<pubDate>Fri,20 Dec 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Evaluation of MRI range of fungal spherical rhinosinusitis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.12.007</link>
<description><![CDATA[Objective: To investigate the MRI features of fungal spherical rhinosinusitis and assess the extent of sinus involvement in patients, to improve the accuracy of preoperative diagnosis of fungal spherical rhinosinusitis. Materials and Methods: Retrospectively analyzed the clinical data, CT and MRI images of 24 patients with fungal sinus rhinosinusitis confirmed by operation and pathology. The characteristic imaging findings on MRI were mainly observed. The sinus involvement range was evaluated in combination with surgical records. Results: ①Of the 24 cases, 21 underwent CT scan and 24 underwent MRI scan. ②There were 23 cases of unilateral lesions and 1 case of bilateral lesion. ③There were 17 cases of unilateral sinus lesions (16 cases of unilateral maxillary sinus and 1 case of unilateral sphenoid sinus), and 7 cases occurred in multiple sinus cavities (2 cases involving maxillary sinus, ethmoid sinus and forehead sinus, 2 cases involving the sphenoid sinus and ethmoid sinus, 2 cases involving the maxillary sinus and ethmoid sinus, 1 case involving bilateral maxillary sinus and unilateral ethmoid sinus). ④CT scan showed that in 21 cases, the lesion sinus cavity was filled with uneven soft tissue density, 19 cases showed nodular, speckled, flocculent high-density calcification, and 2 cases showed no calcification. Of the 21 cases, 13 had sinus wall sclerosis; 12 cases had sinus enlargement, and 9 of them had partial bone resorption and destruction. ⑤MRI showed that the lesions were mostly located in the center of the sinus (15/24), partially in the sinus ostium (9/24), three cases had lesions in both place (3/24), the lesions showed a slightly lower to slightly higher signal on T1WI and a characteristic low signal on T2WI, the range of hypointensity area is larger than the CT calcification, the boundary of the low signal region is clear. In the affected sinus cavity, the mucosa thickened, T1WI showed equal or slightly lower signal, T2WI showed high signal; enhanced scan showed no enhancement of lesions and obvious enhancement of mucosa, the boundary of the lesion can be more clearly displayed. Conclusions: MRI multi-sequence imaging has great advantages for the display of fungal spheres, especially the characteristic low T2WI signal with a range larger than the calcification shown by CT. MRI can more accurately assess the extent of lesions and the involvement of adjacent tissues. It helps to improve the accuracy of preoperative diagnosis of fungal spherical rhinosinusitis.]]></description>
<pubDate>Fri,20 Dec 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Ultrasonography compared with magnetic resonance imaging for the diagnosis of struma ovarii: Correlation with histopathology]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.12.008</link>
<description><![CDATA[Objective: To analyze the ultrasound and MR features of struma ovarii(SO), and to evaluate the diagnostic efficacy of the two examinations for SO. Materials and Methods: The study included 24 SO cases and 72 control cases who underwent both ultrasound and MRI examinations before surgery. The imaging manifestations and pathological results of SO were compared retrospectively. Results: On ultrasound and MR imaging, the common appearance of SO was a multi-lobulated cystic or cystic-solid mass, with variable echo or signal intensity in cystic components, and rich blood flow or significant enhancement in solid components. The most specific feature was the “roundish white ball” on ultrasound and the low signal “struma pearl”on MR images. The sensitivity, specificity, Youden index were 37.50%, 90.78%, 0.28 for ultrasound, and 79.17%, 94.44%, 0.74 for MRI, respectively. Conclusions: Both ultrasound and MR could manifest some characteristic imaging features of SO, but the sensitivity and diagnostic efficacy of MRI was significantly superior than that of ultrasound. MR imaging could help ultrasound improve the detection of SO.]]></description>
<pubDate>Fri,20 Dec 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[The multi-modal images predictive analysis of hemorrhagic transformation after ischemic stroke]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.12.010</link>
<description><![CDATA[Hemorrhagic transformation after cerebral infarction is the most dread complication of cerebral infarction after recanalization therapy, which could affect the prognosis of patients to a large extent. Therefore, the researchers attempted to predict the risk of re-bleeding after treatment of patients with cerebral infarction via various images of patients, so as to evaluate the risk of patients in early stage of onset and make the best clinic management. This paper retrospectively analyzed the value of multiple imaging examinations on the predictor of hemorrhagic transformation after cerebral infarction on the purpose of providing instructions for further studies in the future.]]></description>
<pubDate>Fri,20 Dec 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Advances in the effects of preeclampsia on brain structure and function]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.12.011</link>
<description><![CDATA[Preeclampsia (PE) is a pregnancy-specific syndrome affecting multiple organs including the brain. Although the symptoms of PE will gradually subside after termination of pregnancy or delivery, the history of preeclampsia (HPE) will become a risk factor for hypertension and cardiovascular disease (CVD) in women's later life, so PE may be associated with cognitive impairment. Studies have shown that long-term pathological changes may occur in the brain of women with HPE, such as persistent white matter lesions (WML), and PE may be a risk marker for early cerebrovascular damage. The long-term effects of PE are mainly cognitive impairment, such as memory loss, inattention and slow response. In addition, some changes in brain structure and function in elderly women with HPE were found to be similar to those in some neurological diseases, such as Alzheimer's disease (AD). This article aims to explore the possible long-term effects of PE on brain structure and function. The author reviews the neuroimaging research progress of preeclampsia.]]></description>
<pubDate>Fri,20 Dec 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Research progress of 7.0 T MRI in the central nervous system diseases]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.12.012</link>
<description><![CDATA[The central nervous system diseases are complex and diverse, easily cause irreversible damage, and the prognosis is poor. Early intervention can significantly improve the prognosis. 7.0 T MRI (7.0 tesla magnetic resonance imaging) can provide better neuroimaging than conventional MRI, especially in small and early lesions, opening up a new broad road in diagnosis and clinical study of central nervous system diseases. This article incorporates the latest literature at home and abroad to discuss the latest advances in 7.0 T MRI in central nervous system diseases.]]></description>
<pubDate>Fri,20 Dec 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Application of functional magnetic resonance imaging in mild cognitive impairment]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.12.013</link>
<description><![CDATA[Mild cognitive impairment, an intermediate state between normal aging and dementia, is a risk factor for developing Alzheimer's disease and is characterized by memory loss faster than normal aging. In recent years, along with the rapid development of neuroimaging, resting-state functional magnetic resonance imaging (rs-fMRI) and diffusion tensor imaging (DTI) are gradually applied to the early diagnosis of mild cognitive impairment, showing their respective strengths and weaknesses. Therefore, people try to combine them for analysis, which can be basically divided into three methods: rs-fMRI-assisted DTI, DTI-assisted rs-fMRI and rs-fMRI and DTI allelic combination, thus obtaining higher diagnostic efficiency. The author will expound the combined application of the above three methods in mild cognitive impairment.]]></description>
<pubDate>Fri,20 Dec 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Research progress of traditional DKI and fast DKI in acute ischemic stroke]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.12.014</link>
<description><![CDATA[Early diagnosis, early intervention and thrombolytic therapy within the time window of acute stroke have become important means to reduce death and disability. However, due to individual differences, the time window of thrombolysis is different, and accurate evaluation of the degree of cerebral infarction is crucial to the feasibility of thrombolysis. Diffusion kurtosis imaging (DKI) can be used to evaluate the true microstructural pathological changes of acute cerebral infarction, which provides the possibility for thrombolysis to restore blood supply in ischemic penumbra and save as much brain tissue as possible. In order to solve the problem of limited clinical use due to the long time of traditional DKI collection, a fast DKI technique was proposed in recent years. This article reviews the research progress of traditional DKI and rapid DKI in acute stroke.]]></description>
<pubDate>Fri,20 Dec 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Application status and limitations of arterial spin labeling in mild cognitive impairment]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.12.015</link>
<description><![CDATA[Due to the increasing aging of the world in recent years, age-related dementia has brought more and more burdens to family and society. It is an inevitable trend to explore mild cognitive impairment in the early stage of dementia, and with the gradual development of imaging. Arterial spin labeling (ASL) as a non-invasive, repeatable, no contrast agent technology has gradually been applied. This article reviews the advantages of ASL and its application in mild cognitive impairment.]]></description>
<pubDate>Fri,20 Dec 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Research progress on magnetic resonance imaging of cervical spondylosis myelopathy]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.12.016</link>
<description><![CDATA[Cervical spondylosis myelopathy (CSM) can influence the nerve system by an insidious onset. During the later period, nerve injury is irreversible. Early diagnosis and treatment are meant for saving nerve function and improving quality of life. A routine magnetic resonance imaging (MRI) has low-sensitivity. Thus, multi-parameter MRI technologies are brought forward for CSM. This review introduces multi-parameter MRI technologies which are applied to CSM.]]></description>
<pubDate>Fri,20 Dec 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Advances in magnetic resonance imaging in the diagnosis of prostate cancer]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.12.017</link>
<description><![CDATA[Because magnetic resonance imaging (MRI) has the advantages of good soft tissue resolution, multi-directional imaging and multi-parameter functional imaging, it has gradually become an important imaging method for the diagnosis of prostate cancer. With the maturity of MRI imaging technology, a variety of imaging methods such as magnetic resonance perfusion imaging (PWI), diffusion-weighted imaging (DWI), intravoxel irrelevant motion (IVIM)  diffusion imaging, magnetic resonance spectroscopy (MRS), diffusion tensor imaging (DTI), diffusion kurtosis imaging (DKI), T2 mapping and magnetic susceptibility weighted imaging (SWI) play an important role in the diagnosis of prostate cancer. With the development of these technologies, the accuracy of prostate cancer diagnosis has been significantly improved. The role of magnetic resonance imaging in the diagnosis of prostate cancer in recent years is reviewed.]]></description>
<pubDate>Fri,20 Dec 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Application and research progress of MRI texture analysis in the diagnosis and treatment of prostate cancer]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.12.018</link>
<description><![CDATA[With big data and deep learning, image grouping represented by texture analysis has developed rapidly. It plays an active role in the early diagnosis, accurate treatment and prediction of recurrence of prostate cancer, and caters to the personalized diagnosis and treatment in the new era. The author reviews the research progress in the above aspects in order to provide new ideas for the imaging research of prostate cancer in China and evidence-based support for accurate medical treatment.]]></description>
<pubDate>Fri,20 Dec 2019 00:00:00  GMT</pubDate>
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<title><![CDATA[Research progress and clinical application of three-dimensional magnetic resonance arterial spin labeling]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2019.12.019</link>
<description><![CDATA[Arterial spin labeling (ASL) is a perfusion imaging technology with endogenous proton contrast agent, which can reflect tissue blood perfusion without the use of contrast agent. 3D-ASL is developed in recent years a new volume perfusion imaging technology, avoid the risk of contrast potential adverse reactions, the completely noninvasive and lower cost, repeatable examination, easy to operate, so there are many advantages compared with other sequence, wider application range, the research on 3D-ASL technology progress and clinical application shall be reviewed.]]></description>
<pubDate>Fri,20 Dec 2019 00:00:00  GMT</pubDate>
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