http://med-sci.cn/cgzcx/en/contents_list.asp?issue=202206 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.1674-8034.2022.06.001 Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.002 Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.003 Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.004 Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.005 ^, measurements. According to whether the data conformed to the normal distribution or not, independent samples t-test or Mann-Whitney U test was used to compare the difference of T2 value between rectal cancer group A and group B. Results: T2 mapping parameters measured by the two observers were in consistent, and most of the scattered points in the Bland-Altman graph were evenly distributed between the +1.96 and -1.96 standard lines. The T2 values of group A and group B were (77.15±6.95) ms and (87.06±7.55) ms, respectively. Group A was lower than group B, and the difference was statistically significant (P＜0.05); the area under the curve (AUC), threshold, sensitivity and specificity of T2 value in predicting LVI were 0.861, 83.19 ms, 84.62% and 76.19%, respectively. Conclusions: T2 mapping has high value in predicting LVI of rectal cancer.]]> Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.006 Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.007 Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.008 Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.009 ^,s disease (PD) patients by resting-state functional magenetic resonance imaging (rs-fMRI) and to investigate whether the altered dynamic regional characteristics were associated with the clinical behavior scores in PD patients. Materials and Methods: The rs-fMRI data of 32 PD patients (PD group) who have enrolled in the Subei People^,s Hospital from August 2018 to August 2021 and 33 age-and sex-matched healthy controls (HC group) were prospectively collected. Temporal dynamic analysis (TDA) toolbox based on MATLAB were used for data processing. The differences of dynamic regional homogeneity (dReHo) between PD and HC groups were detected by two sample t-test. The cognitive function of the patients was evaluated with the Mini-Mental State Examination (MMSE) scores and Montreal Cognitive Assessment scores. The third part of Unified Parkinson^,s disease Rating Scale (UPDRS) was used to assess the patients^, motor function. Pearson correlation was used to analyze the correlation between dReHo in regions showing significant intergroup differences and clinical scores. Receiver operating characteristic (ROC) curve analysis was used to evaluate the diagnostic value of altered dReHo indexes to identify PD patients. Results: Compared with HC group, PD group showed decreased dReHo in left caudate,right putamen and bilateral lingual (P＜0.05). The dReHo variability in left caudate (r=0.374, P=0.04) and right putamen (r=0.379, P=0.03) was positively correlated with the MMSE scores of the PD patients. The dReHo variability in the left caudate (r=-0.446, P=0.01), right putamen (r=-0.369, P=0.04) and left lingual (r= -0.419, P=0.02) was negatively correlated with the UPDRS-Ⅲ scores of the PD patients. Furthermore, ROC curve analysis demonstrated a higher diagnostic performance of altered dynamic regional characteristics to identify PD patients. Conclusions: PD patients have abnormal brain activity at resting state, which affects the movement and cognitive function. The dynamic regional homogeneity variability in related brain regions could distinguish Parkinson^,s patients from healthy controls at the individual level.]]> Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.010 ^,t have any therapy. Functional magnetic resonance imaging data and clinical information were acquired at baseline and after treatment. The VMHC analysis method was used to compare the difference between two groups at baseline and in MwoA patients before and after treatment. Furthermore, correlation analysis was conducted to explore the relationship between VMHC changes of brain regions modulated by acupuncture treatment and improvement in clinical scores. Results: Compared with healthy controls, MwoA patients revealed significantly decreased VMHC in the bilateral cerebellum_Ⅷ, cuneus and postcentral gyrus (voxel level P＜0.001,cluster level P＜0.05). After acupuncture treatment, the clinical indicators of migraine patients were significantly improved, and resting-state functional magnetic resonance imaging showed that weakened VMHC of the bilateral cuneus remarkably enhanced (voxel level P＜0.001, cluster level P＜0.05). The change of VMHC in the bilateral cuneus was positively correlated with change of self-rating anxiety scale scores (r=0.291, P＜0.05). Conclusions: Impaired VMHC in the bilateral cerebellum, visual cortex and primary somatosensory cortex may be involved in the central mechanism of MwoA during interictal period. Acupuncture treatment had significant clinical efficacy for migraine, and could enhance weaken VMHC in the bilateral cuneus.]]> Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.011 ^, cognitive dysfunction after EC-T chemotherapy.]]> Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.012 Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.013 ^,s correlation analysis was used between altered ReHo values and blood biochemical index. Results: Compared with the healthy controls, ESRD patients showed the ReHo values in left temporal pole, right orbital inferior frontal gyrus and bilateral rectus gyrus were significantly increased (P＜0.001, AlphaSim corrected), meanwhile, the ReHo values in bilateral calcarine sulcus, left inferior frontal gyrus, right superior temporal gyrus and supramarginal gyrus were significantly decreased (P＜0.001, AlphaSim corrected). ESRD patients showed decreased FC between right calcarine sulcus and left inferior frontal gyrus and right supramarginal gyrus (P＜0.05, NBS corrected). We also found decreased FC between right supramarginal gyrus and right superior temporal gyrus (P＜0.01, NBS corrected). Correlation analyses showed that ReHo values in right calcarine sulcus were positively correlated with haemoglobin levels (r=0.347, P=0.048) and haematocrit (r=0.357, P=0.041). Conclusion: ESRD patients had dyssynchrony of local functional activities in several brain regions, mainly involving the default mode network, which may contribute to further understanding of the neuropathological mechanism of brain injury in ESRD patients.]]> Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.014 ^,s Sleep Habits Questionnaire (CSHQ). Results: The results of the t-test showed that compared with the healthy control group, the DC value of the NE group decreased in the anterior cingulate gyrus and parahippocampal gyrus of the limbic lobe; Compared with healthy controls, the ReHo value of NE group in the anterior cingulate gyrus decreased. Correlation analysis showed that the DC value of the parahippocampal gyrus was positively correlated with the score of abnormal sleep (P=0.045, r=0.256); Correlation analysis showed that the DC value of the parahippocampal gyrus was positively correlated with the score of CSHQ (P=0.010, r=0.062). Conclusions: The study shows that the decrease of local brain function activity in children with NE at rest may be closely related to the pathology of enuresis.]]> Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.015 Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.016 Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.017 Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.018 Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.019 Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.020 ^, lungs, and to optimize magnetic resonance sequence scanning parameters. Materials and Methods: Prospectively enrolled 95 preterm infants, 50 male infants and 45 female infants who underwent pulmonary MR examinations in our hospital from March to July 2021, aged from 1 day to 1 year and 10 months, and the median age was 5 months. All volunteers performed lung magnetic resonance examinations on the United Imaging 3.0 T pediatric specific magnetic resonance equipment (UIH uMR Alpha). The scanning sequence included 3D UTE and 3D GRE sequences. Each sequence uses different scanning parameters for sequence debugging. According to different scanning parameters, all subjects were randomly divided into five groups in 3D UTE sequence: Group 1 (18 cases), Group 2 (17 cases), Group 3 (19 cases), Group 4 (21 cases) and Group 5 (20 cases). 3D GRE sequence were randomly divided into four groups: Group Ⅰ (24 cases), Group Ⅱ (22 cases), Group Ⅲ (23 cases) and Group Ⅳ (26 cases). Two radiologists evaluated the image quality at different scanning parameters using objective evaluation methods. The objective evaluation indicators include signal noise ratio (SNR) and contrast noise ratio (CNR). Scanning time among different groups were further compared. Results: There were statistically significant differences (P＜0.05) in SNR and CNR of lung images at different scanning parameters for the 3D UTE and 3D GRE sequences. In the 3D UTE sequence, the SNR and CNR of Group 1, 2, and 3 were significantly different from those of Group 4 and 5, respectively (P＜0.05), while there was no significant difference in image quality between Group 4 and 5 (P＜0.05). Meanwhile, the scanning time was reduced by 77.95%, 75.55% and 6.67% in Group 4 compared with Group 1, 2, and 3, and 76.06% and 73.45% in Group 5 compared with Groups 1 and 2, respectively. In the 3D GRE sequence, the SNR and CNR of Group Ⅰ and Ⅱ were statistically significant (P＜0.05) compared with those in the Group Ⅲ and Ⅳ, respectively, while no statistically significant differences were seen in the image quality between the Group Ⅲ and Ⅳ (P＞0.05). Meanwhile, the scan time was reduced by 70.80%and 24.24% in Group Ⅲ compared with Group Ⅰ and Ⅱ, respectively, and 40.71% in Group Ⅳ compared with Group Ⅰ, while the image quality was significantly improved. Conclusions: 3D UTE and 3D GRE sequences are feasible for MRI of the of preterm infants^, lungs. The recommended scanning parameters for 3D UTE sequences are the Group 4 and 5, and the recommended scanning parameters for 3D GRE are the Group Ⅲ and Ⅳ.While ensuring high image quality, it greatly shortens the clinical scan time, and improves the success rate of examinations.]]> Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.021 Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.022 Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.023 Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.024 Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.027 ^,s disease (AD). At present, there is no effective radical cure for AD. Therefore, early diagnosis and intervention of MCI are of great significance to prevent or delay the development of AD. MRI radiomics can extract and analyze the features of MCI patients^, images in a non-invasive way, which can provide more potential imaging biomarker information, and then guide clinical accurate diagnosis and treatment, which has a broad development prospect. This paper reviews the concept of radiomics and the research progress of MRI radiomics in the diagnosis, classification and conversion prediction of MCI.]]> Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.028 ^,s disease (PD). PD with depression (DPD) can aggravate motor and cognitive dysfunction, and lead to poor prognosis. Therefore, for the early diagnosis and timely intervention of DPD, there is a great significance to improve the condition and alleviate the deterioration of other symptoms. Unfortunately, the symptoms of DPD are easy to overlap with other symptoms of PD, which is difficult to find in the process of clinical diagnosis and treatment. These imaging techniques such as voxel-based morphometry (VBM), resting-state functional magnetic resonance imaging (rs-fMRI), diffusion tensor imaging (DTI), diffusion spectrum imaging (DSI), and high angular resolution diffusion imaging (HARDI) can objectively show not only changes in the structure but also functional of the central nervous system. In addition, the imaging characteristics of lesions can be extracted by radiomics to improve the accuracy of diagnosis and differential diagnosis. Therefore, this paper reviews the research progress of multimodal MRI and radiomics in DPD in recent years.]]> Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.029 Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.030 Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.031 Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.032 Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.033 Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.034 Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.035 Mon,20 Jun 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.06.036 Mon,20 Jun 2022 00:00:00 GMT