http://med-sci.cn/cgzcx/en/contents_list.asp?issue=202205 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.1674-8034.2022.05.001 Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.002 Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.003 Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.004 ^, (SCV) morphological parameters and deep white matter lesions (DWML) through establishing a deep learning algorithm model based on susceptibility-weighted imaging (SWI). Materials and Methods: Three hundred and sixty-four healthy volunteers were recruited. All subjects underwent a routine head scan and SWI, SWI images of 200 subjects were randomly selected to reconstruct the minimum intensity projection (MinIP) image. The deep learning algorithms were used to analyze the MinIP images to establish the automatic quantification model of SCV morphological features. One hundred and sixty-four subjects were used for analyzing the morphological features of SCV in the bilateral cerebral hemispheres including diameter, tortuosity index (TI), and so on by using the deep learning models. According to whether there are DWML, the 164 subjects were divided into two groups including the group of DWML comprised 53 subjects and the group of no-deep white matter lesions (N-DWML) comprised 111subjects. The Mann-Whitney U test was used to compare the quantitative indicators of SCV between the group of DWML and N-DWML, and a binary logistic regression model was established for significant difference indicators and DWML. Results: The training set^,s average accuracy rate of the deep learning algorithms model for analysis of SCV morphological features was 98.19%, the validation set^,s average accuracy rate was 98.02%, and the test set^,s average accuracy rate was 98.03%. There were no differences in the distribution of age and years of education in the quantitative indicators of SCV in bilateral cerebral hemispheres (P＞0.05), but there were significant differences in the distribution of gender, which showed that the number of SCV in males was significantly more than that of females (Right: P=0.004, Left: P＜0.001). No significant difference was found in the diameter and number of SCV in bilateral cerebral hemispheres between DWML group and N-DWML group (P＞0.05). However, the TI of SCV in DWML group was significantly larger than N-DWML group (P＜0.001). The TI of SCV in right cerebral hemisphere was significantly correlated with the occurrence of DWML (regression coefficient=2.035, P=0.015). Conclusions: There is a potential correlation between the morphological changes of the SCV and the DWML. The changes in TI of the SCV may affect the local hemodynamic changes and lead to the occurrence of DWML.]]> Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.005 Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.006 Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.007 ^,s test was used to compare the differences between models. Results: The MRI features of parotid tumors were as following: compared with parotid benign tumors, malignant tumors were mostly located in deep lobe or double lobes (P＜0.001), with less clear boundary (P＜0.001), heterogeneous appearance (P=0.003), more cystic degeneration or necrosis occurred (P= 0.002) and infiltration of surrounding structures or lymph node metastasis suggests a greater possibility of malignancy (P＜0.001).The radiomics models were analyzed as follows: 7 radiomics models were constructed based on FS-T2WI, ADC and CE-TIWI sequence to distinguish benign from malignant tumors of parotid gland. The ROC analyses on 7 models resulted in an area under the curve (AUC) of 0.798 for FS-T2WI model, 0.838 for ADC model, 0.856 for CE-T1WI model, 0.815 for FS-T2WI+ADC model, 0.858 for FS-T2WI+ CE-T1WI model, 0.863 for ADC+CE-T1WI model, and 0.878 for multi-sequence joint model. Seven radiomics models were constructed with the same method for differentiation between pleomorphic adenomas and Warthin tumor, the AUC were 0.724, 0.910, 0.848, 0.887, 0.876, 0.915 and 0.954, respectively. Conclusions: The diagnostic performance of multi-sequence joint model in differentiating benign from malignant tumor of parotid gland and distinguishing pleomorphic adenoma from Warthin tumor are both better than that of single sequence and double sequence models, and CE-T1WI and ADC obtain the highest diagnostic efficiency among single sequences, respectively.]]> Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.008 ^,s correlation test to compare BPE correlation with various clinical factors; χ2 test was used to compare the degree of BPE with different molecular subtypes of breast cancer, the difference between menopause or not. Results: One hundred and ninety-nine cases were enrolled, of which 32 were Luminal A, 118 cases of Luminal B [Luminal B (HER-2 positive) 48 cases, Luminal B (HER-2 negative) 70 cases], 24 cases of HER-2 overexpression type, 25 cases of basal-like type. BPE has negative correlation with the patient^,s age, weight, and body mass index (BMI)(P＜0.05); BPE has no significant correlation with the patient^,s height; BPE has a positive correlation with the patient^,s menopause (P＜0.01), the BPE of menopausal patients is mainly minimal or mildly enhanced, and the BPE of non-menopausal patients is mainly mild or moderate enhancement, some were severe enhancement, and the difference was statistically significant (P＜0.01). BPE degree and the molecular subtypes of breast cancer were correlated (P＜0.05), but the results of the analysis showed no statistically significant difference among the groups (P=0.162); the combined degree of BPE was divided into minimal+mild, moderate+severe enhancement, the results showed that there was no difference in the degree of BPE among the molecular subtype groups (P=0.298). Conclusions: There has a correlation between BPE with patient^,s age, weight, BMI, menopause or not. And the BPE is connected with the molecular subtypes of breast cancer, but there is no difference between the groups after grouping.]]> Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.009 Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.010 Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.011 Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.012 Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.013 Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.014 ^,s t-test. The correlation between the ReHo value of cerebral regions in the MHE group and the MoCA scale score was analyzed by Person correlation analysis. Results: Compared with the healthy control group and the liver cirrhosis group, the NCT-A score of the MHE group was significantly increased, and the DST, MoCA scale scores were significantly decreased, with statistical difference (P＜0.01). Compared with the healthy control, the ReHo of the right middle frontal gyrus, middle temporal gyrus, inferior temporal gyrus and bilateral para-central lobule was significantly reduced in the MHE group, and the ReHo of the left anterior wedge lobe was increased, with statistical difference (P＜0.05). Correlation analysis showed that in the MHE group, the MoCA score were negatively correlated with average ReHo value of the left anterior central gyrus, the left superior temporal gyrus, and part of the occipital region (P＜0.05), and were positively correlated with the average ReHo value of the right superior marginal gyrus (P＜0.05). Conclusions: The cognitive impairment in patients with MHE may be related to the changes of ReHo in the cerebral region.]]> Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.015 Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.016 ^,s Kappa test. The interclass correlation cofficient (ICC) for PV and subjective scoring were employed. The difference in the number of STS was analyzed by Fisher^,s exact test. The least-significant difference (LSD) of one-way analysis of variance (ANOVA) was used to compare the difference in image quality and PV with different AFs. The P values were corrected by the false discovery rate (FDR) of Benjamini-Hochberg method. The corrected P＜0.05 were considered significant. Results: The consistency between two observers of subjective rating was excellent (Kappa＞0.80). The ICC on PV and subjective rating were excellent (ICC＞0.80). When AF≥6, the resolution on STS decreased significantly. The number of STS decreased with the AF increases, in other words, the STS diaplaying rate was gradually decreased, and there was significant difference (P＜0.05). The SNR and CNR of bilateral SNs in AF＞2 were significant difference (P＜0.05). When AF＞4, the SNR and CNR of bilateral STSs showd significant difference (P＜0.05). Conclusions: According to the quantitative data on brain SWI, combine the SNR, CNR, subjective rating and the displaying rate with different AFs, CS4 can be used to obsreve the STS, and the scanning time is reduced by 70.7% (4 min 9 s).]]> Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.017 ^,s test and Wilcoxon signed rank test with SPSS 23.0 software. Results: Scan time decreased with increasing acceleration factors (PI 2.0: 152 s; CS 2.0: 128 s, CS 2.5: 104 s, CS 3.0: 86 s; ACS 2.5: 76 s, ACS 3.0: 65 s, ACS 3.0: 57 s, ACS 4.0: 51 s). The results of subjective scores by two readers showed strong agreement and almost perfect agreement (0.735≤κ≤0.869). There was significant difference in subjective scores and SNR among the 8 groups (P＜0.05). There was no significant difference in subjective scores and 5 SNRs between CS 2.0, ACS 3.0 and PI 2.0 respectively (P＞0.05). There was no significant difference in subjective scores and 4 SNRs between ACS 2.5 and PI 2.0, while a SNR of ACS 2.5 was higher than that of PI 2.0 significantly (P＜0.05). The subjective scores of CS 2.5, CS 3.0, ACS 3.5, ACS 4.0 were lower than that of PI 2.0 significantly, and there was 1, 5, 2, 2 SNRs lower than those of PI 2.0 respectively(P＜0.05). Conclusions: ACS and CS could accelerate shorten MR acquisition time. Compared with CS, ACS was more effectively, and ACS could reduce the acquisition time by 57% on the premise of ensuring image quality in keen PDWI.]]> Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.018 ^, social behavior and the subjective experience through participating in the cognition, emotion and memory functions, so as to be strongly associated with life satisfaction.]]> Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.019 Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.020 Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.021 Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.022 ^,s hip MRI scan, which could be conducive to optimized pediatric MRI scan process.]]> Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.028 Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.029 ^, quality of life. The operation of microvascular decompression is the most effective method to treatment hemifacial spasm. High resolution imaging of the facial nerve and its ambient blood vessels was performed before surgery to accurately locate the compression site, providing the reference for making surgical plans and predicting surgical outcomes. The development of magnetic resonance neurovascular imaging sequence and post-processing technology provides an accurate image method for preoperative judgment of the relationship between facial nerve and vessels. This article reviews magnetic resonance cisternography and angiography techniques, image reconstruction and fusion techniques, clinical manifestations of vascular compression in different areas of facial nerve, the correlation between neurovascular relationship and surgical prognosis in patients with facial spasm.]]> Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.030 Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.031 Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.032 Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.033 Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.034 Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.035 Fri,20 May 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.05.036 Fri,20 May 2022 00:00:00 GMT