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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=201811</link>
<language>zh-cn</language>
<copyright>An RSS feed for Chinese Journal of Magnetic Resonance Imaging</copyright>
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<title><![CDATA[The application of three-dimensional T1 weighted imaging for detecting neonatal punctate white matter lesions]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.11.001</link>
<description><![CDATA[Objective: To compare the different for detecting neonatal punctate white matter lesions between three-dimensional T1 weighted imaging (3D-T1WI) and conventional MRI, diffusion imaging and susceptibility-weighted imaging, and to assess the value of 3D-T1WI sequence in the brain MR examination for neonates. Materials and Methods: Between March 2011 and February 2013, neonates with PWML underwent 3.0 T MRI exam were recruited. The routine protocol included 3D-T1WI, T2 weighted imaging (T2WI), diffusion tensor imaging (DTI) and 3D-enhanced susceptibility-weighted angiography (ESWAN). Reformatted T1WI (4 mm), apparent diffusion coefficient (ADC) map and magnitude image were obtained from 3D-T1WI, DTI and ESWAN, respectively. The numbers of PWML cases and lesions were calculated in all images independently. Results: (1) The number of cases that identified by 3D-T1WI, reformatted T1WI, T2WI, ADC maps and magnitude maps were 84 (100%), 69 (82.14%), 71 (84.52%), 73 (86.90%) and 70 (83.33%), respectively. (2) For 53 cases whose lesions can be counted, the total number of lesions detected by 3D-T1WI, reformatted T1WI, T2WI, ADC maps and magnitude maps were 422, 151, 185, 142 and 152, respectively. There are significant difference of the detectivity of punctate lesions between 3D T1WI and other MRI sequences (P＜0.001). Comparing to 3D-T1WI, the detection rate of reformatted T1WI, T2WI, ADC maps and magnitude maps was 35.78% (151/422)、43.84% (185/422)、33.65% (142/422)、36.02% (152/422), respectively. Conclusions:  The detection rate of punctate lesions in 3D T1WI is higher than that in other MRI sequences. It is greatly recommended to use 3D T1WI as a routine sequence for neonatal brain MR examination.]]></description>
<pubDate>Tue,20 Nov 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Predicting elevated CBF following carotid artery stenting and endarterectomy]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.11.002</link>
<description><![CDATA[Objective: The purpose of this study was to predict elevated cerebral blood flow (CBF) by three-dimensional pseudo continuous arterial spin labeling (3D-pCASL) in patients who underwent carotid artery stenting (CAS) and endarterectomy (CEA), in the hope of providing a prognosis index for elevated CBF after CAS and CEA and thus to provide some references for the selection of surgical methods. Materials and Methods: Symptomatic eighteen patients [15 males and 3 females, age=(61.6±8.2) years] with 70%—99% unilateral internal carotid artery (ICA) stenosis were consecutively enrolled, of these, 11 underwent CAS and 7 underwent CEA in a prospective cross-sectional study from November 2015 to February 2017. Routine MRI examinations and 3D-pCASL were performed using a 3.0 T system within 7 days prior to operations, and at 4 consecutive time-points (24, 48, 72, and 96 h) after the operations. Pearson's correlation for the relationships between elevated flow, antegrade flow, and collateral flow was determined. P＜0.05 was considered statistically significant. Results: Collateral flow showed a significant positive correlation with elevated CBF (r=0.877, P=0.000) after CAS, but no correlation with elevated CBF after CEA (r=-0.099, P=0.833), despite CEA had higher collateral flow than CAS (P＜0.05). Antegrade flow showed a significant negative correlation with elevated CBF (r=-0.905, P=0.005) after CEA, while no correlation with elevated CBF after CAS (r=-0.317, P=0.342), when the antegrade flow is largely identical (P＞0.05). Conclusions:  Leptomenigeal collateral and antegrade flow effecting on the elevated CBF are different after CAS and CEA, which may provide some references for the selection of surgical methods.]]></description>
<pubDate>Tue,20 Nov 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Differentiation of breast benign and borderline phyllodes tumors from fibroadenomas on MRI]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.11.003</link>
<description><![CDATA[Objective: To analyze the MRI characteristics of benign and borderline phyllodes tumors (PT) and fibroadenomas of the breast, and to improve the differential diagnosis. Materials and Methods: We analyzed MRI features statistically of 52 cases of benign and borderline lobulated tumors and 68 cases of fibrous adenoma, which were confirmed by postoperative pathology and had complete magnetic resonance data in our hospital. Results: The phyllodes tumors were more common in lobulated or multi-nodular fusion shapes. Fibroadenomas were more common in round or round-like shape, and there were no multi-nodular fusion. Both phyllodes tumors and fibroadenomas were commonly smooth. Eighteen phyllodes tumors showed a flaky high signal in the lesion on T1WI, and the pathology showed bleeding. Only 5 cases of fibroadenomas showed high signal. On T2WI, phyllodes tumors showed high signal and fibroadenomas showed low or equal-low signal. After dynamic enhanced scanning, phyllodes tumors showed obvious and uneven enhancement, cystic changes were seen in part. Fibroadenomas showed uniform enhancement, only 1 case showed cystic change, both showed no reinforcement separation. Time-signal intensity curve (TIC) classification, phyllodes tumors was more common in type Ⅱ, fibroadenomas was more common in type Ⅰ. On DWI performance, phyllodes tumors all showed high signal, and 8 cases of fibroadenomas showed low or equal-low signal. Conclusions:  The benign and borderline phyllodes tumors and fibroadenomas of the breast have some differences in shape, signal, enhancement mode and TIC curve, which are helpful for the differential diagnosis of fibroadenomas.]]></description>
<pubDate>Tue,20 Nov 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Quantitative MRI study of the relationship between fat content in lumbar paravertebral muscles and disc degeneration]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.11.004</link>
<description><![CDATA[Objective: To investigate the relationship between paravertebral muscle fat content and intervertebral disc degeneration with quantitative MR technique. Materials and Methods: Fifty-seven patients (21 male, 36 female) with low back pain or sciatic were enrolled in this study. The lumbar imaging protocol included routine sagittal lumbar T2-weighted imaging (T2WI) imaging and axial iterative decomposition of water and fat with echo asymmetry and least-squares estimation quantitation (IDEAL-IQ) sequence. Degeneration of lumbar intervertebral disc (IVD) were qualitatively evaluated by using Pfirrmann grading system in sagittal T2WI imaging. Fat fraction (FF) and cross-sectional area (CSA) were obtained from axial IDEAL-IQ imaging of lumbar to quantify fatty degeneration of bilateral lumbar multifidus muscle (MF), erector spinae muscle (ES), and psoas muscle (PS) at each disc level from L1 to S1 on AW 4.6 workstation. The paravertebral muscles were classified according to 5 Pfirrmann grades of the same level of IVD into 5 groups. Univariate analysis of variance (ANOVA) was employed to judge the difference of the FF and CSA of paravertebral muscles among these groups, Spearman correlation analysis was used to evaluate the correlation between Pfirrmann degeneration of IVD and degeneration of paravertebral muscles (FF and CSA), Multiple linear regression analysis was used to assess whether gender, age, degree of lumbar intervertebral disc degeneration were independent factors on paravertebral muscles degeneration, and P＜0.05 was considered statistically significant. Results: There were significant differences in FF and CSA of paravertebral muscles between different IVD Pfirrmann grades. Pfirrmann grades of IVD were associated with the FF of PS, ES, and MF (correlation coefficients were 0.208, 0.392, 0.433, P values were less than 0.001), and were associated with the CSA of PS, ES and MF (correlation coefficients were 0.170, -0.284, 0.240, P values were 0.004, ＜0.001, ＜0.001). Gender, age and IVD Pfirrmann grades were independent factors impact on the FF of PS and MF. Pfirrmann grades of IVD were the independent factor influencing the FF of ES. Gender, age, and Pfirrmann grades of IVD were independent influencing factors of CSA of PS and MF. Gender and lumbar disc Pfirrmann grades were independent factors for the CSA of ES. Conclusions:  There was a moderate correlation between the high fat content of ES and MF and the grade of IVD degeneration. Pfirrmann grades of IVD were the independent factors impact on the FF and CSA of PS, ES and MF.]]></description>
<pubDate>Tue,20 Nov 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[To evaluate the oxygenation function of normal placenta and placenta accreta by BOLD-MRI]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.11.005</link>
<description><![CDATA[Objective: Our study aimed to obtain the changes of oxygenation level and its distribution characteristics in normal placenta after hyper-oxygen inhalation. And to explore the effect of the placenta accreta on placental oxygenation function preliminarily. Materials and Methods: Total 25 cases of normal placenta and placental accreta were prospectively included in the study. Sixteen cases were confirmed for the normal placenta and 9 cases were placenta accreta by pathology/operation. All patients performed BOLD-MRI examination for 10 minutes. Pregnant women breathed room air during the first 3 minutes and oxygen for the last 7 minutes by mask. The region of interesting (ROI) was sketched by post-processing workstation of Siemens. The normal placenta was sketched the global placenta (Nor-p), the placenta-uteine side (Nor-u) and the placenta-uteine side (Nor-f) respectively in two planes well displayed. The implanted placenta sketched the global placenta (Imp-p) in well-displayed planes including the implanted site, and also the placenta-uterus side (Imp-u) and the placenta-fetal side (Imp-f) respectively. The renal parenchyma of pregnant women was sketched as Pre-r. The BOLD signal values increasing over time of each ROI were obtained and the signal increment percentage (△BOLD%) was calculated. The△BOLD%-time curves were drawn by SPSS 24.0 Compared the differences of △BOLD% in last 3 min of groups. Independent sample t test was used between the normal and implanted placenta, paired sample t test was used between the two sides of placenta. Results: After oxygen inhalation, the △BOLD%-time curve increased significantly during 4—7 min of each ROI except for Pre-r, then it leveled off. The △BOLD% in the last 3 min was obtained as the platform. The mean △BOLD% of Nor-f (16.25±1.3)% was higher than the Nor-u (12.89±1.2)%. The Imp-p (17.74±1.6)% was higher than Nor-p (14.38±1.2)%. And the △BOLD% of the Imp-f was higher than that of Imp-u, the △BOLD% of the Imp- f/u were higher than those of the Nor- f/u respectively. The t test showed that there were significance between control groups (P＜0.01). Conclusions:  BOLD-MRI can assess the physiological oxygenation status of the placenta and has a potential to detect changes in placental oxygenation semi-quantitatively. Moreover, implanted placenta lesions have no obvious damage to the oxygenation function of placental villi, which provides a certain basis for no clinical intervention of oxygen supply for cases of placenta accreta.]]></description>
<pubDate>Tue,20 Nov 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Functional magnetic resonance imaging study of brain effect mechanism of "acupuncture at Chongyang acupoint for the treatment of walking slowly and difficulty"]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.11.006</link>
<description><![CDATA[Objective: To observe the activation and inhibitory areas in the brain by acupuncture normal healthy volunteers, and to explore the brain effect mechanism of "acupuncture at Chongyang point for the treatment of walking slowly and difficulty". Materials and Methods: Using the 3.0 T MR scan, 16 healthy volunteers were collected and the data were processed and statistically analyzed. Materials and Methods: Using the 3.0 T MR scan, 16 healthy volunteers were collected and the data were processed and statistically analyzed. Results: Acupuncture at Chongyang point positive activation area: the left cerebellum anterior lobe, cerebellum posterior lobe, center prefrontal gyrus of frontal lobes, superior temporal gyrus (BA42), temporal transverse back (BA41), middle temporal gyrus, parietal lobe, outer core, lentiform nucleus, the lateral pallidum, the right cerebellum posterior lobe, forehead prefrontal (BA6), middle frontal gyrus (BA10), inferior frontal gyrus, gyri temporales transversi, gyri temporalis mediium, posterior central gyrus of parietal lobe (BA3), inferior parietal lobule, cingulate gyrus (BA24), insula, thalamus. Negative activation area: the left occipital, posterior cingulate (BA30), precuneus, temporal gyrus, the right hippocampus, outer core. Conclusions:  Acupuncture Chongyang closely associated with brain center of acupuncture effect, acupuncture information can directly affect the "pain matrix" reduce analgesic effect, pass though the effect of positive activation of thalamus on the conduction of pain information, and negative activated limbic system restrain subjective feelings of emotional response to alleviate the pain.]]></description>
<pubDate>Tue,20 Nov 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Magnetic resonance imaging evaluation of axial bone in four cases with SAPHO syndrome]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.11.007</link>
<description><![CDATA[Objective: To investigate MRI findings of axial bone in patients with SAPHO syndrome (synovitis, acne, pustulosis, hyperostosis and osteitis) and its evaluation value. Materials and Methods: The MRI manifestations of anterior chest wall, whole spine and bilateral sacroiliac joint in 4 SAPHO patients were observed and analyzed. Results: In the current research, four patients all suffered from different degrees of the anterior chest wall involvement, mainly including sternoclavicular and manubriosternal joint. It was characterized by hyperostosis, osteosclerosis, bone marrow edema, joint narrowing and effusion, and soft tissue edema around sternoclavicular joints. A total of 40 vertebral bodies were involved in the whole spine. The most commonly affected site was the thoracic spine, followed by the lumbar spine, and finally the cervical spine. The abnormal signals of vertebral bodies included bone marrow edema, fat deposition and mixed signals. We also observed the vertebral corner and endplate involvement, facet joints involvement, intervertebral disc and corresponding space lesions. The thickening, fat deposition and bone bridge formation of the anterior longitudinal ligament were observed in two cases. Among the involved 3 cases, the lesions predominantly affected unilateral iliac bone. The abnormal MRI signals presented as bone marrow edema and osteosclerosis. The soft tissue edema in front of the right ilium was detected in one case. Conclusions:  MRI could clearly reveal many lesions of axial bone in patients with SAPHO syndrome with certain characteristics. Bone marrow edema could be used to evaluate the activity of the disease and determine the condition, so as to guide clinical treatment and follow-up.]]></description>
<pubDate>Tue,20 Nov 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Advance of magnetic resonance imaging in Parkinson<sup><sup>,</sup></sup>s disease subtypes]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.11.010</link>
<description><![CDATA[Parkinson's disease (PD) is a neurodegenerative disease caused by the selective loss of dopaminergic neurons in the substantia nigra pars compacta (SNc), including both motor and non-motor symptoms. According to different motor symptoms, it’s usually divided into tremor dominant PD (TD-PD)/rigidity dominant PD (RD-PD) and tremor dominant PD (TD-PD)/ postural instability gait difficulty PD (PIGD-PD). Available data indicate that there is a difference in the clinical course and prognosis of PD patients with different motor subtypes, that is, nTD-PD patients may have faster disease progression and are more prone to non-motor symptoms such as cognitive impairment. Therefore, understanding the potential pathogenesis of different motor subtypes is of great significance for the treatment and prognosis of patients. Magnetic resonance imaging (MRI), as a safe and non-invasive image detection technology, is increasingly being applied to the study of PD motor subtypes.]]></description>
<pubDate>Tue,20 Nov 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Advances in imaging studies of gender differences in depression]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.11.011</link>
<description><![CDATA[Major depressive disorder (MDD) is an affective disorder, characterized by a marked and persistent mood depression. The gender difference of MDD begins at puberty, and women are more likely to become depressed, and this trend will continue to adulthood. The ratio of male and female depression is about 12. In recent years, neurobiological studies of MDD have shown that the structural and functional change of amygdala and prefrontal network is closely related to MDD.]]></description>
<pubDate>Tue,20 Nov 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[The application of ReHo in ophthalmologic diseases]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.11.012</link>
<description><![CDATA[With the development of imaging techniques, resting-state functional MRI (rs-fMRI) has been widely used in the diagnosis and treatment of ophthalmic diseases. In visual research, fMRI can directly locate the cortical function related to visual formation. Regional homogeneity (ReHo) is one of the research methods of rs-fMRI, which has been widely used to study local spontaneous synchronous signals in fMRI imaging. It provides a new way of understanding the relationship between the characteristics of ocular diseases and the changes of local brain functional areas. The application of ReHo in ophthalmic diseases is summarized as follows.]]></description>
<pubDate>Tue,20 Nov 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Image evaluation of skeletal muscle fat quantification and its clinical value in type 2 diabetes mellitus]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.11.013</link>
<description><![CDATA[In recent years, with the advancement of imaging technology, the determination of skeletal muscle fat content has become increasingly accurate. Body fat is considered to be a main target organ of insulin, and body fat composition is closely associated with insulin resistance. In particular, ectopic deposition and abnormal metabolism of skeletal muscle fat are one of the important factors in the pathogenesis of insulin resistance. Type 2 diabetes is one of the most common non-communicable diseases in the world with alarmingly high incidence globally, especially in developing countries. At present, insulin resistance (IR) is considered to be the main pathogenesis of type 2 diabetes. Therefore, the clinical value of the correlation between skeletal muscle fat content and insulin resistance is particularly critical. Image evaluation of skeletal muscle fat content and the study of its association with insulin resistance play a crucial role in the management and treatment of diabetes such as physical activity, life style modification, and medication.]]></description>
<pubDate>Tue,20 Nov 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Advances in neuroimaging of adolescent idiopathic scoliosis]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.11.014</link>
<description><![CDATA[Adolescent idiopathic scoliosis (AIS) is one of the most common scoliosis, which severely affects the physical and mental health of adolescents.In recent years, some reports indicate that abnormal changes in the central nervous system may be the main pathogenesis of AIS. By magnetic resonance imaging, the brain and spinal cord structures and functions of AIS were found to be abnormal.]]></description>
<pubDate>Tue,20 Nov 2018 00:00:00  GMT</pubDate>
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<title><![CDATA[Advances in the application of quantitative magnetic resonance imaging for evaluating the degenerative changes of articular cartilage]]></title>
<link>http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2018.11.015</link>
<description><![CDATA[Articular cartilage plays an important role in maintaining the normal structure and function of the joint, and the degeneration of articular cartilage is one of the most important early changes in many joint diseases. Once the articular cartilage is damaged and degenerated, it is difficult to heal and becomes irreversible, so it is very vital to early evaluate and diagnose the degeneration of articular cartilage. MRI can show articular cartilage directly and clearly because of its superior soft tissue contrast. Therefore, it is considered as the best method for evaluating articular cartilage degeneration. With the rapid development of quantitative MRI techniques in recent years, the changes of biochemical composition and structure of early degenerative cartilage can be quantitatively detected before morphological changes occur. In this review, the anatomical physiology of articular cartilage, pathophysiology of degeneration and application advances of various quantitative MRI techniques in degeneration of articular cartilage are summarized.]]></description>
<pubDate>Tue,20 Nov 2018 00:00:00  GMT</pubDate>
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