http://med-sci.cn/cgzcx/en/contents_list.asp?issue=202202 zh-cn An RSS feed for Chinese Journal of Magnetic Resonance Imaging http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.001 Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.002 Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.003 ^, myocardial strain decreases more than HCM patients for obvious reasons, the relative apical retention mode provides a certain reference value for the differential diagnosis of the two, and the relative apical RS has the best diagnostic efficiency.]]> Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.004 Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.005 Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.006 ^,s disease (AD) and amnestic mild cognitive impairment (aMCI), to provide more information on the pathogenesis of AD and explore clinical value of NODDI technology for AD and aMCI. Materials and Methods: Fifteen patients with aMCI, 20 patients with AD and 20 normal controls (NC) was recruited for prospective NODDI scanning, using MRIcro software to measure the three groups of bilateral hippocampal neurite density index (NDI), neurite direction dispersion index (ODI), and volume fraction of isotropic water molecule (Viso). The differences of each parameter among the three groups using single-factor analysis of variance was compared, LSD was used to test the differences between groups. For the different parameters, Spearman correlation analysis was used to analyze the correlation between the parameters and the MMSE score and the MoCA score to obtain the correlation coefficient r. Results: Compared with the NC group, the bilateral hippocampal NDI value and ODI value of the aMCI group and the AD group were significantly lower than the NC group, the difference was statistically significant (P＜0.001); the Viso value was significantly higher than the NC group, and the difference was also statistically significant (P＜0.001). The aMCI group and the AD group were compared between the groups. The Viso value of the AD group was significantly higher than that of the aMCI group, and the difference was statistically significant (P＜0.001), while the difference between the NDI value and the ODI value was not statistically significant (P＞0.05). Correlation analysis shows that the left hippocampal NDI value (r=0.656, P＜0.001) have the strongest positive correlation with the MMSE score, and the left Viso value (r=-0.690, P＜0.001) has the strongest negative correlation with MMSE score; at the same time, the left hippocampal NDI value (r=0.632, P＜0.001) has the strongest positive correlation with MoCA score, and the left Viso value (r=-0.629, P＜0.001) has the strongest negative correlation with MoCA. Conclusions: The number, volume and arrangement complexity of bilateral hippocampal neurites in the aMCI stage and AD stage are significantly reduced, which provides more reference data for exploring the pathogenesis of AD. At the same time, during the progression of aMCI to AD, the bilateral hippocampal Viso value may become an important evaluation index, which has important value for the identification, follow-up and prognosis evaluation of aMCI and AD.]]> Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.007 Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.008 Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.009 Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.010 ^,s mood disorder is related to the metabolism of the hippocampus and putamen.]]> Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.011 Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.012 Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.013 ^, body geometry. Materials and Methods: To achieve better matching of scanning position and coil, one adult head was selected as the research object, and the flexible coil for the head was made by filling the surface of the coil with common-side regular hexagon. To verify the performance of the self-made coil and the commercial coil, comparative experiments were carried out with water film and true human head respectively. Results: The water film experiment proved that with the increase of imaging depth, the SNR of the self-made coil showed a decline trend. The maximum SNR was of the surface layer which was 3 times that of the deep layer; compared with the commercial 8-channel head coil, from the tissue surface to the deep layer (46 mm) of the water film, the SNR of the self-made coil increased by 0-2 times. Compared with the SNR at the 46 mm depth, the SNR at a deeper point was reduced by about 15%. Scanning the coronal surface structure of the human head showed that the SNR value of the coronal surface structure of the human head had the largest SNR value at the surface position and the smallest SNR value at the center. From the surface layer to the deep layer, the SNR of the image gradually decreased. At the same time, due to incomplete coil laying, the imaging results would be worsened to a certain extent. The tests showed that the self-made coil was feasible and stable. Conclusions: It fully proves that the combination of flexible material and elastic material can adapt to the geometric deformation caused by the adult^,s head change, so as to obtain the maximum filling coefficient inside the coil. At the same time, the imaging quality worsening caused by the incomplete laying of the coil also exists, which cannot be compensated by a high filling coefficient, so in the clinical application it cannot be ignored.]]> Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.014 ^,s test. Results: A total of 13 articles were included, involving 504 patients and 821 ROIs. The pooled results of IVIM parameters for differentiating between PCa and healthy peripheral zone (PZ) showed that ADC, D and f values were significantly lower in regions of PCa compared to those of regions of PZ {WMD=-0.82 [95% CI (-1.01--0.64)], Z=8.69, P＜0.0001; WMD=-0.54 [95% CI (-0.78--0.29)], Z=4.34, P＜0.0001; WMD=-6.91 [95% CI (-12.12--1.70)], Z=2.60, P＜0.0001}. In addition, D was significantly lower than ADC in the regions of PCa {WMD=-0.20 [95% CI (-0.38--0.03)], Z=2.26, P=0.02}. Compared with the low-grade (LG) PCa group, the pooled results showed that ADC value and D value in intermediate/high-grade (HG) PCa were significantly decreased {WMD=-0.24 [95% CI (-0.30--0.19)], Z=8.06, P＜0.001; WMD=-0.25 [95% CI (-0.33--0.17)], Z=5.99, P＜0.001}. Conclusions: IVIM parameters are suitable for the differential diagnosis of PCa, and the D value may be more valuable than the ADC value in the characterization of PCa lesions. In addition, ADC value and D value can further distinguish LG and HG prostate cancer.]]> Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.015 Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.016 Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.017 Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.018 Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.019 Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.025 ^,s disease (AD), so early diagnosis and treatment of patients with MCI is important to prevent and delay the progression to various types of dementia. At present, there is no clear drug treatment can significantly delay or change the course of AD development. Diet as a major part of lifestyle, a large number of studies have confirmed that certain nutrients, dietary patterns are associated with cognitive function and brain morphology or function, and can reduce the risk of AD and the transition from MCI to AD. With the development of imaging technology, the relationship between dietary factors and imageology in patients with cognitive impairment and the changes of neuroimageology after dietary improvement have gradually become a research hotspot both at home and abroad. This article reviewed the recent advances in neuroimaging of dietary intervention in cognitive impairment in order to explore the neuroimaging mechanism of dietary intervention and its clinical application.]]> Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.026 Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.027 Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.028 Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.029 ^,s mental illness and actively treat patients are of great help. So this paper provides a review of the recent research progress on functional magnetic resonance imaging (fMRI) on changes in brain function in PTSD patients to enhance public mental health recovery in response to the persistence of a series of public health emergencies.]]> Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.030 Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.031 Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.032 Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.033 Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.034 Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.035 Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.036 Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.037 Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.038 ^,s the main problem to be solved urgently to preoperative evaluate the involvement of the nipple-areola complex (NAC) and to select the proper patients for NSM. The research progress and advantages and disadvantages of using imaging methods to predict the preoperative involvement of NAC in recent years were reviewed in this paper, which provided important information for surgeons to choose subsequent surgical methods.]]> Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.039 Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.040 Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.041 Sun,20 Feb 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.02.042 Sun,20 Feb 2022 00:00:00 GMT