http://med-sci.cn/cgzcx/en/contents_list.asp?issue=202108 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.1674-8034.2021.08.001 ^,s disease (PD) patients with different motor subtypes and their similarities and differences. Materials and Methods: Three-dimensional pseudo-continuous arterial spin labeling (3D-pCASL) data were collected from 26 patients with tremor dominant (TD) Parkinson^,s disease, 27 patients with postural instability/gait difficulty (PIGD) and 35 normal controls (NC). SPM based on MATLAB were used to data processing. Covariance analysis and double sample t test were used to detect the differences of local cerebral perfusion among the groups to observe cerebral perfusion changes and their differences in patients with different subtypes of PD. The cognitive function of the patients was evaluated with the MMSE score. Pearson correlation method was used to calculate the correlation between relative cerebral blood flow (rCBF) and clinical scores in different motor subtypes of PD. Results: Compared with healthy controls, TD group showed increased perfusion in left parahippocampal gyrus, left fusiform gyrus, left precentral gyrus, left postcentral gyrus, bilateral thalamus, and bilateral cerebellum,while decreased perfusion in right temporal pole (middle and superior temporal gyrus), and right middle frontal gyrus (P＜0.05); compared with healthy controls, PIGD group showed increased perfusion in left hippocampus, left parahippocampal gyrus, left fusiform gyrus, left precentral gyrus, left paracentral lobule and bilateral thalamus,while decreased perfusion in left inferior temporal gyrus, left superior marginal gyrus, and right middle frontal gyrus (P＜0.05); compared with PIGD group, the TD group showed increased perfusion in right cerebellum and the left precentral perfusion was decreased (P＜0.05). Additionally, rCBF values of the left precentral gyrus and right cerebellum 8 region was positively correlated with TD scores in the TD group (r=0.397, 0.541, P＜0.05), and rCBF values was positively correlated with MMSE scores (r=0.411, P=0.04) in the PIGD group. Conclusions: The cerebral perfusion patterns of PD patients with different motor subtypes were different, the perfusion changes of TD patients mainly existed in the brain areas associated with cerebello‑thalamo‑cortical (CTC) circuit, while the PIGD patients mainly existed in the striatal‑thalamo‑cortical (STC) circuit. The characteristic perfusion patterns of different motor subtypes of PD contribute to the pathophysiological mechanism exploration and the clinical classification diagnosis.]]> Fri,20 Aug 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.08.002 1H-MRS may be expected as a clinical reference for early diagnosis of MCI.]]> Fri,20 Aug 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.08.003 Fri,20 Aug 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.08.004 Fri,20 Aug 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.08.005 Fri,20 Aug 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.08.006 Fri,20 Aug 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.08.007 Fri,20 Aug 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.08.008 Fri,20 Aug 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.08.009 Fri,20 Aug 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.08.010 Fri,20 Aug 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.08.011 ^, vertebral fat content was calculate at GE AW 4.6 standard workstation. After 16 weeks, all rabbits were killed by air embolization, and the lumbar 5—7 vertebral body was taken for the adipocyte count with HE staining. The ratio of lumbar bone marrow to fat in control group, simple diabetes group and intervention group at each time point and the content of lumbar bone marrow adipocytes under HE staining were measured by repeated measurement ANOVA. Pearson correlation analysis was performed on FF value and bone marrow adipocyte content obtained at 16 weeks, and P＜0.05 was considered statistically significant. Results: The percentage of bone marrow fat in the vertebral body measured by IDEA-IQ at 0th and 16th week was significantly different between the diabetic group and the vitamin D intervention groups (F=4.971, P＜0.05; F=3.055, P＜0.01), the control group has no statistical differences in vertebral fat fraction at every examination point; However, there was no statistically significant difference in FF value between the diabetic group and the vitamin D intervention group at 16th week (t=2.390, P=0.06). Pearson correlation analysis showed that there was a positive correlation between the fat fraction (FF) of lumbar bone marrow and the number of fat after HE staining at the 16th week in diabetic rabbits (r=0.828, P＜0.05). Conclusions: IDEAL-IQ technique is feasible to evaluate the change of bone marrow fat content in alloxan-induced diabetic rabbits with vitamin D supplement. After 16 weeks of vitamin D supplement, the change of bone marrow fat content showed a decreasing trend.]]> Fri,20 Aug 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.08.012 Fri,20 Aug 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.08.013 Fri,20 Aug 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.08.014 Fri,20 Aug 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.08.015 ^,s consent, all patients underwent 3.0 T MRI prior to the puncture. Analyzed the difference of ADC value of lung cancer active components and non-tumor components around tumor at different b-values, and used ROC curve to analyze the guiding efficiency of MRI multi-b-value DWI for precise puncture of lung occupying lesions. Results: Under different b values of the four groups (b values are 300, 600, 900, 1200 s/mm2), the differences between the active components of lung cancer and the surrounding non-tumor subgroups were statistically significant (P＞0.05), and the ADC values of the active components of lung cancer were all lower than those of the surrounding non-tumor components. When b=900 s/mm2, ADC value had the highest differential diagnosis efficiency for lung cancer tumor active components and surrounding non-tumor components (obstructive chronic inflammation, atelectasis and fibroplasia), and the highest guidance efficiency for clinical precise puncture. Conclusions: DWI has important application value in precise puncture of lung space-occupying lesions.]]> Fri,20 Aug 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.08.017 ^,s disease (PD). FOG manifests as sudden interruption in walking and severe movement difficulties, which increases the risk of falling and declines the quality of life. However, the neuropathophysiological mechanism of PD-FOG is still unclear. The previous study uses multi-modal imaging techniques to the changes in the brain function and structure of PD patients with or without FOG, and links these findings with the severity of FOG. This article reviews the research progress of multimodal imaging technology in the diagnosis and treatment of PD patients with FOG.]]> Fri,20 Aug 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.08.018 Fri,20 Aug 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.08.019 Fri,20 Aug 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.08.020 Fri,20 Aug 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.08.021 ^,s hospital and Baoding children^,s hospital, the author reviewed the latest progress of MRI technology in infants with brachial plexus injury.]]> Fri,20 Aug 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.08.022 Fri,20 Aug 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.08.023 Fri,20 Aug 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.08.024 Fri,20 Aug 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.08.025 Fri,20 Aug 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.08.026 Fri,20 Aug 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.08.027 Fri,20 Aug 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.08.028 Fri,20 Aug 2021 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2021.08.029 Fri,20 Aug 2021 00:00:00 GMT