http://med-sci.cn/cgzcx/en/contents_list.asp?issue=202109 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.1674-8034.2021.09.001 Mon,20 Sep 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.09.002 ^,s Tau-b was used to analyze the consistency of the results by the two radiologists. Paired t-test was used to analyze the consistency in the APT values between the left and right side of temporal muscles, parotid glands, cerebellum and turbinate and the difference in the APT values between nasopharyngeal carcinoma tissue and normal nasopharyngeal left and right temporal muscle, parotid glands, cerebellum and turbinate on the same slice. Student t-test was used to compare APT values between differentiated and undifferentiated subtypes of NPC. Results: In terms of performance of lesion depiction, two radiologists agreed with a correlation coefficient of 0.844. There were no significantly difference in APT values between left and right of temporal muscles, parotid glands, cerebellum, and turbinates (P=0.475, 0.765, 0.443, and 0.544, respectively). The difference in APT values between nasopharyngeal carcinoma lesions and normal nasopharyngeal and parotid gland tissues was not statistically significant (P= 0.338 vs. P=0.664 & 0.933), but the APT values of nasopharyngeal carcinoma lesions were significantly higher than the left and right temporal muscles and cerebellum tissues (P＜0.001), but lower than the turbinate tissue (P＜0.001). When it comes to subtypes of NPC, no significant difference was found in APT values between differentiated 1.97%±0.89% and undifferentiated NPC 1.95%±0.82%. Conclusions: This study showed that APT imaging is satisfactory in depicting nasopharyngeal lesions, and technically feasible in the nasopharyngeal area. APT effect of different tissue types can be accurately quantified in this area, which provides practical experience in clinically applying APT imaging to the nasopharynx.]]> Mon,20 Sep 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.09.003 Mon,20 Sep 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.09.004 ^,s correlation, and Bland-Altman statistics were used. Results: Compared with patients with negative CMR, the PM number, PMMi and LVMi were significantly greater in patients with HCM [(2.4±0.6) vs. (2.1±0.3), (5.8±1.2) g/m2 vs. (2.8±0.5) g/m2, (118.6±21.5) g/m2 vs. (58.4±6.9) g/m2, P＜0.05 respectively]. Moreover, the LVMi and PMMi in patients with LV outflow obstructions were significantly greater than those without obstructions [(131.9±15.3) g/m2 vs. (115.7±21.8) g/m2, (6.8±1.4) g/m2 vs. (5.5±0.9) g/m2, P＜0.05 respectively]. In patients with HCM, PMMi was weakly correlated with the magnitude of LV outflow gradient (r=0.405, P＜0.05). The reproducibility of PMMi measurements was excellent (intraclass correlation coefficients, ICC=0.961, 0.913). The Bland-Altman analysis chart showed only a few spots outside the 95% consistency boundaries. Conclusions: For patients with HCM, PM morphologic abnormalities are common and PMMi correlates with magnitude of LV outflow gradient. CMR can be used to estimate PM morphology with good reproducibility.]]> Mon,20 Sep 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.09.005 ^,s Hospital from January 2017 to October 2020 were collected. Three groups of optimized sequences were extracted from the whole sequence for independent evaluation by two radiologists: (1) Non-contrast group, including T2WI and DWI sequences. (2) Dynamic enhancement group, including four-phase enhanced images of disodium gadolinium (early arterial phase, arterial phase, portal venous phase, equilibrium phase). (3) Hepatobiliary phase group, including T2WI, DWI and 20 min T1-HBP sequences. According to the pathological results, the patients were divided into positive or negative liver cancer, and the diagnostic efficiency of the abbreviated sequence in the three groups was calculated. Results: The scanning and preparation time of the three groups of abbreviated MRI sequences (minutes: seconds) are 12:52, 13:04 and 14:06, respectively. The sensitivity and 95% confidence interval of the three abbreviated sequences for diagnosing small hepatocellular carcinoma were 0.855 (0.750, 0.928), 0.913 (0.820, 0.967), 0.942 (0.858, 0.984), and the specificity was 0.731 (0.590, 0.844), 0.904 (0.790, 0.968), 0.885 (0.766, 0.956). The coincidence rate was 0.802 (0.719, 0.869), 0.909 (0.843, 0.954), 0.917 (0.853, 0.960). The positive likelihood ratios of the three groups were 3.18, 9.51, 8.19, the negative likelihood ratios were 0.19, 0.09, 0.06, and the Youden index was 0.586, 0.817 and 0.827 respectively. Conclusions: The sensitivity of non-contrast group is higher, which is helpful for small hepatocellular carcinoma screening, while the specificity and coincidence rate of dynamic enhancement group and hepatobiliary phase group are higher, and the diagnostic efficacy of screening small hepatocellular carcinoma is better.]]> Mon,20 Sep 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.09.006 Mon,20 Sep 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.09.007 Mon,20 Sep 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.09.008 Mon,20 Sep 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.09.009 Mon,20 Sep 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.09.010 Mon,20 Sep 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.09.011 Mon,20 Sep 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.09.012 Mon,20 Sep 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.09.013 Mon,20 Sep 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.09.014 Mon,20 Sep 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.09.015 Mon,20 Sep 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.09.016 Mon,20 Sep 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.09.021 Mon,20 Sep 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.09.022 Mon,20 Sep 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.09.023 Mon,20 Sep 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.09.024 ^,s detection rate of intracranial atherosclerotic plaques has obvious advantages over traditional imaging methods, and it can effectively display the wall structure and plaque properties, and now it has been widely used in clinical research. Intracranial atherosclerotic plaque is one of the main culprits of ischemic stroke, the detection and evaluation of which is very necessary for the prevention and treatment of ischemic stroke. This paper reviews the imaging features of intracranial atherosclerotic plaque and its relationship with risk factors affecting its stability,brain circulation.]]> Mon,20 Sep 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.09.025 Mon,20 Sep 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.09.026 Mon,20 Sep 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.09.027 Mon,20 Sep 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.09.028 Mon,20 Sep 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.09.029 Mon,20 Sep 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.09.030 Mon,20 Sep 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.09.031 Mon,20 Sep 2021 00:00:00 GMT