http://med-sci.cn/cgzcx/en/contents_list.asp?issue=202209 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.1674-8034.2022.09.001 t-tests to identify difference in brain areas in ET patients at baseline and 2 years after MRgFUS thalamotomy, The ReHo values of this significantly different brain region in the HC and ET groups were extracted using the DPABI v5.1 toolkit, a two independent sample t-test was used to compare spontaneous and synchronous brain activity in this significantly different brain region between the HC and ET groups, and one-way repeated measures ANOVA was used to compare spontaneous and synchronous brain activity in this significantly different brain region between the ET group at baseline, 6 months after MRgFUS, and 2 years after MRgFUS. We used Spearman correlation analysis to correlate the trend between clinical tremor improvement in the ET group after surgery and the change in ReHo values in the ET group; and Pearson correlation analysis to correlate the rate of tremor improvement in the ET group 2 years after MRgFUS with the baseline ReHo values in the ET group. Results Findings showed that the significantly different brain regions in the ET group at baseline and 2 years after MRgFUS were located in the right postcentral gyrus. Compared with the HC group, the ReHo value of the right postcentral gyrus at baseline was significantly lower in the ET group (P＜0.01). There was no statistically significant difference in the right postcentral gyrus two years after MRgFUS in the ET group (P＞0.05). The ReHo value of the right postcentral gyrus increased in the ET group at baseline, 6 months after MRgFUS, and 2 years after MRgFUS (F=3.95, P＜0.05). There was a positive correlation between the improvement of clinical tremor and the change of ReHo value after operation; the improvement rate of CRST-A 2 years after MRgFUS in the ET group was negatively correlated with the baseline ReHo value in the ET group (r=-0.709, P=0.032). Conclusions MRgFUS thalamotomy helps relieve tremor symptoms in ET patients, MRgFUS thalamotomy affects the spontaneous and synchronous brain function of ET patients, and there is a correlation between ReHo and clinical score, which provide neuroimaging basis for the evaluation of nerve remodeling after MRgFUS.]]> Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.002 ^,s index (EI) and callosal angle (CA) of all subjects were measured. The correlation of cerebrospinal fluid volume ratio, gray matter volume ratio and white matter volume ratio with MMSE and MoCA was analyzed. Results There were no significant differences (P＞0.05) in age and sex between the iNPH group and the control group and there were significant differences (P＜0.05) in EI, CA, gray matter volume ratio, white matter volume ratio and cerebrospinal fluid (CSF) volume ratio. White matter volume ratio was positively correlated with MMSE (r=0.492, P=0.001). The volume ratio of gray matter was negatively correlated with MMSE (r=-0.478, P=0.002). While CSF volume ratio, EI, CA were not correlated with MMSE. There was no correlation between intracranial volume parameters and MoCA. Conclusions The brain white matter volume ratio and gray matter volume ratio are related to cognitive dysfunction in patients with iNPH. The brain white matter volume ratio is negatively related to cognitive dysfunction and the brain gray matter volume ratio is positively related to cognitive dysfunction. When the brain white matter volume ratio is large, the cognitive dysfunction is relatively mild.When the brain gray matter volume ratio is large, the cognitive dysfunction is relatively serious. The measurement of brain white matter volume ratio and gray matter volume ratio can provide objective imaging evidence for the evaluation of cognitive dysfunction in iNPH.]]> Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.003 P＜0.005, peak height Z＞1, cluster extent≥20 voxels). Conclusions Meta-analysis was used to confirm the abnormal core brain regions in mTBI patients. These findings help delineate specific areas of interest and understand the neurobiological basis of mTBI.]]> Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.004 * value), perfusion fraction (f value), mean diffusion rate (MD value) and mean kurtosis value (MK value) were measured. Independent samples t-test was used to compare the differences of each parameter between the two groups, and univariate/multivariate logistic regression analyses were further performed. Receiver operating characteristic (ROC) curve and area under the curve (AUC) were used to analyze the diagnostic efficacy of each parameter alone or combination diffusion models (DWI+IVIM, DWI+DKI and DWI+IVIM+DKI) in differentiating benign and malignant breast TIC type-Ⅱ lesions. Results The ADC, D, f, MD, and MK values of the two groups were significantly different (P＜0.05), but the D^* value of the two groups had no significant difference (P＞0.05). Multiple logistic regression analysis showed that the D value and MK value were independent influencing factors in the differential diagnosis of the two groups, with the largest odds ratio for MK value (AUC 0.871, specificity 88.0%, sensitivity 80.8% and accuracy 78.6%). There was no significant difference in AUC among each combined diffusion model (P＞0.05), but three-combination diffusion model achieved the greatest diagnostic efficiency (AUC 0.915, sensitivity 92.3%, specificity 84.0% and accuracy 86.4%), and the AUC of which was statistically higher than that of DWI (AUC 0.816, P＜0.05). Conclusions DWI combined with IVIM and DKI have a good differential diagnostic value for benign and malignant breast TIC type-Ⅱ lesions.]]> Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.005 P＜0.05). There were no significant differences in AUCs between Kaiser score and Kaiser+ (P=0.885). Compared with ADC value, the Kaiser score is independent of background parenchymal enhancement when making a lesion diagnosis. Conclusions For BI-RADS 4 breast lesions, the Kaiser score is superior to ADC mapping and may help to avoid unnecessary biopsies. However, the combination of both indicators did not significantly contribute to breast cancer diagnosis.]]> Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.006 Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.007 ^,s Hospital of Shunde) from July 2019 to December 2020 were retrospectively collected, and multiphase enhanced MRI scans with Gd-EOB-DTPA were performed before surgery, including pre-enhancement (Pre), arterial phase (AP), portal venous phase (PP), equilibrium phase (EP), hepatobiliary phase (HBP), T1 mapping, while Ki-67 staining was performed. Quantitative parameters including T1 relaxation time (T1rt), reduction rate of T1 relaxation time (rrT1rt), tumor to liver contrast ratio (TLR), contrast enhancement ratio (CER) were measured. The correlations between each quantitative parameter and the expression of pathological Ki-67 were analyzed using Spearman correlation coefficient. In addition, patients were divided into low Ki-67 expression group (≤25%, 40 cases) and high Ki-67 expression group (＞25%, 34 cases), and the differences of quantitative parameters between the two groups were compared by independent samples t test or Mann-Whitney U test. The diagnostic efficacy of each parameter was analyzed according to the receiver operating characteristic curve, and the difference of the area under the curve (AUC) of each parameter was compared by DeLong test (P＜0.05). Results T1rt-Pre, T1rt-20min are strongly positively correlated with Ki-67 [r=0.668 (95% CI: 0.515-0.780),r=0.659 (95% CI: 0.494-0.784),all P＜0.001]; TLR-Pre, TLR-HBP are moderately negatively correlated with Ki-67 [r=-0.495 (95% CI: -0.647--0.300), r=-0.497 (95% CI: -0.670--0.288), all P＜0.001]; TLR-PP, TLR-EP was weakly negatively correlated with Ki-67 [r=-0.272 (95% CI: -0.483--0.035), P=0.019; r=-0.362 (95% CI: -0.568--0.142), P=0.002]. There were significant differences in T1rt-Pre, T1rt-20min, TLR-Pre, TLR-AP, TLR-EP, TLR-HBP between the two groups (all P＜0.05). The AUC of T1rt-Pre, T1rt-20min, TLR-Pre, TLR-AP, TLR-EP, TLR-HBP were 0.868 (95% CI: 0.769-0.936); 0.890 (95% CI: 0.795-0.951); 0.717 (95% CI: 0.670-0.869); 0.646 (95% CI: 0.527-0.754); 0.680 (95% CI: 0.561-0.784); 0.782 (95% CI: 0.670-0.869), respectively. The AUC values of T1rt-Pre and T1rt-20min were significantly different from those of TLR-Pre, TLR-AP and TLR-EP respectively (all P＜0.05), but had no statistical difference with TLR-HBP. Conclusions T1rt-Pre, T1rt-20min on Gd-EOB-DTPA enhanced MRI combined with T1 mapping were strong positive correlation with the expression of Ki-67 in HCC, and T1rt-Pre and T1rt-20min has a high evaluation value for the expression of Ki-67 in HCC.]]> Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.008 ^,s rank correlation coefficient. Relative risk (RR) rate of ISUP grades was also calculated. Results The Gleason scores and ISUP grades in rENE+ patients were higher than rENE- patients, the statistical differences between two groups were significant. Patients in the rENE+ group were 2.6 times more likely to have ISUP 5 than those in the rENE- group (RR=2.6, 95% CI: 1.477-3.676) and patients in the rENE- group were 17.4 times more likely to have ISUP≤3 than those in the rENE+ group (RR=17.4, 95% CI: 4.2-72.3). The Spearman^,s rank correlation coefficient was 0.547 (95% CI: 0.363-0.688), 0.570 (95% CI: 0.367-0.716) in Gleason scores and ISUP grades. Conclusion rENE was moderately related to Gleason scores and ISUP grades. Compared to rENE- patients, rENE+ patients got higher Gleason scores and ISUP grades. rENE may be used to predict the degree of malignancy of PCa noninvasively.]]> Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.009 n=16; grade Ⅱ, n=14; grade Ⅲ, n=9), including APT and IVIM sequences. APT values and IVIM-derived parameters (f, D, D^*) of lesions were calculated respectively by two radiologists. We used a Shapiro-Wilk test to evaluate whether the APT values and IVIM-derived parameters were normally distributed. The intraclass correlation coefficient (ICC) was calculated to describe the correlations of the measurements of each parameter between two readers. The differences of APT values and IVIM-derived parameters were calculated and compared among three grades. Then the receiver operating characteristic (ROC) curves and DeLong test were used to evaluate the efficiency of the parameters with statistically differences. Spearman^,s correlation analysis was also used between APT values and histologic grades, between IVIM-derived parameters and histologic grades, and between APT values and IVIM-derived parameters. Results All parameters in our research were normally distributed. The ICC of APT values and IVIM-derived parameters between the two readers showed excellent interobserver agreements (APT: 0.955; f: 0.958; D: 0.964; D^*: 0.825). The APT values for grade Ⅱ and grade Ⅲ (3.17%±0.43%, 3.45%±0.42%) were significantly higher than grade Ⅰ (2.66%±0.63%), with statistically significant differences (P=0.012, P=0.001). The f values for grade Ⅱ and grade Ⅲ (0.170%±0.049%, 0.150%±0.011%) were significantly lower than grade Ⅰ (0.220%±0.080%), with statistically significant differences (P=0.027, P=0.010). The ROC analysis showed the AUC (area under the curve) of the APT values, f values and the combined diagnosis of both were as follows: grade Ⅰ vs. grade Ⅱ: 0.78, 0.70, 0.83; grade Ⅰ vs. grade Ⅲ: 0.86, 0.81, 0.92. There were no significant differences in AUC comparison among APT values, f values and combined diagnosis of both. APT values showed a positive correlation with histologic grades (r_s=0.578, P＜0.001) while f values showed a negative correlation (r_s=-0.416, P=0.008). Conclusions APT values and f values were correlated with the histologic grades of EA, and there was no significant difference of APT values and f values in differentiating the histologic grades of EA. APT and IVIM imaging may be helpful to predict histologic grades of EA.]]> Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.010 TM Architect 3.0 T scanner. The supraspinatus tendon was divided into lateral, medial and middle subregions according to its shape in oblique coronal T2WI images view on Magic sequence. Two radiologists with 10 years of experience in musculoskeletal system diagnosis measured the T1, T2 and proton density (PD) values of the supraspinatus tendon on the Magic oblique coronal images, interclass correlation coefficient (ICC) were used to compared the consistency between and within observers. One-way analysis of variance or Kruskal-Wallis H test were used to compare the differences of quantitative parameters in different regions. Receiver operating characteristic (ROC) curves were drawn for parameters with statistically significant differences to evaluate the diagnostic efficacy for tendinitis. Results The T1 and T2 value in the lateral subregion, T2 value in the middle subregion of the tendinitis group were higher than those in the control group, and the difference was statistically significant (P＜0.05). The PD values in lateral subregion, T1 values and PD values in the middle subregion had no significant difference between the two groups (P＞0.05). The T1, T2 and PD value in the medial subregion had no significant difference between the two groups (P＞0.05). The AUC of T1 value in the lateral subregion for the diagnosis of supraspinatus tendinitis was 0.821, sensitivity and specificity were 90.5% and 67.9%. The AUC of T2 value in the lateral subregion was 0.733, sensitivity and specificity were 66.7% and 78.6%. The AUC of T2 value in the middle subregion was 0.682, sensitivity and specificity were 61.9% and 75.0%. The above three values had high diagnostic efficacy for supraspinatus tendinitis. Conclusions The T1 and T2 values of Magic sequence are effective quantitative parameters reflecting chronic supraspinatus tendinitis, which can provide quantitative objective basis of supraspinatus tendinitis.]]> Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.011 U test and least absolute shrinkage and selection operator (LASSO) algorithm were used to eliminate irrelevant and redundant features, to additionally choose the significant features. The most significant parameters were used to build the prediction model by support vector machine (SVM) classifier. Predictive performance of the model was validated using the area under the receiver operating characteristics (ROC) curve (AUC), accuracy, sensitivity and specificity. Results A total of 88 initial radiomics features were extracted from each image. Twelve relevant radiomic features were selected based on the Mann-Whitney U test and LASSO algorithm. The classifier constructed with SVM achieved an AUC of 0.88 based on the most significant features, the accuracy, sensitivity and specificity were 90%, 92% and 100% respectively. The radiomics model exhibited good performance in predicting the injury of TFCC. Conclusions The MRI-based radiomics model could provide a non-invasive tool to identify the injury of TFCC and improve the detection rate of it.]]> Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.012 U test was used to compare the difference of bone marrow PDFF values in different age groups and genders, and Kruskal-Wallis test was used to compare the bone marrow PDFF values in different regions. The Spearman correlation test was used to analyze correlations between age, gender, BMI and bone marrow PDFF, respectively. Finally, multiple linear regression analysis was performed on the PDFF values of each region of proximal femur with age, gender and BMI. Results The PDFF value of bone marrow in young and middle-aged subjects was lower than that in old subjects, and the PDFF value of each subregion was positively correlated with age (P＜0.05). The bone marrow PDFF of males was higher than that of females in all of subregions (P＜0.05). There were significant differences in PDFF between the subregions (P＜0.05). The bone marrow PDFF of the greater trochanter was the highest. The femoral neck PDFF was the lowest. Conclusions The bone marrow fat content in proximal femur increased with age. The amount of bone marrow fat content in the proximal femur may be higher in men than in women. The content of bone marrow fat was different between subregions of proximal femur.]]> Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.013 t test, and the intra-group comparison of T2 values at each time point between the two groups was performed by one-way analysis of variance. A Gaussian fitting model was used to fit the T2 value to the ischemic time point to show the evolution of the ischemic intestinal wall in the small intestine, which was verified by histopathology. The fitting equation between T2 value and ischemic time point is f(x)=145×exp{-[(x-3.475)/4.297]²}, and the fitting coefficient R²=0.79. Results The T2 values of the experimental group at 6 time points were higher than those of the control group, and the difference was statistically significant (P＜0.05). There were statistical differences between T2_3h and T2_1h, T2_2h, T2_5h and T2_6h in the experimental group (P＜0.05). With the progression of ischemia time, the T2 value first increased and then decreased. The pathological manifestations in the first 3 hours were mainly edema and infiltration of inflammatory cells. The T2_3h value reached a peak value of (151.50±2.90) ms at nearly 3 hours of ischemia on the image; at 4 h of ischemia, the intestinal wall injury reached the muscle layer, and the bleeding area greatly increased, the T2_4h value decreased to (142.50±4.30) ms, and the T2 value continued to decrease thereafter. Conclusions MRI T2-mapping technology helps to quantitatively evaluate the small intestinal wall damage in AMI, has certain advantages for early detection of the disease, and has a good clinical application prospect.]]> Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.014 P values. Results The scores by the two observers were in good agreement (Kappa=0.795, 0.871, 0.782, 0.880, 0.847). Compared with different shot times of MS-EPI DWI, there was no significant difference in ADC between the two sides of the cerebellum, and there was statistical difference in the rest of the data (P＜0.05). Compared with the SS-EPI DWI sequence, when the number of shots was 8, the ADC in the left brainstem and pons was smaller than that in the SS-EPI DWI (P＜0.05), and when the number of shots was 4 and 2, the ADC in the bilateral brainstem and pons was smaller than that in the SS-EPI DWI (P＜0.05). When the number of shots was 8, 6, and 2, the SNR, CNR and subjective scores of both sides of the cerebellum and pons and brain stem of MS-EPI DWI were higher than those of SS-EPI DWI. When the number of shots was 6, the SNR and CNR of the left cerebellum and pontine stem, the SNR and CNR of the right cerebellum, the SNR of the right pontine stem and subjective scores were significantly different from those of SS-EPI DWI (P＜0.05). Conclusions Compared with SS-EPI DWI, MS-EPI DWI based on IRIS that showed higher SNR and lower geometric distortion compared with SS-EPI DWI. MS-EPI DWI shots 6 is recommended for clinical skull base between imaging time and image quality.]]> Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.015 ^,s disease (PD). Materials and Methods Fifty patients with PD diagnosed by PD specialty in our hospital from January 2018 to June 2021 were randomly selected as PD group, and 50 healthy people who came to our hospital for physical examination at the same time were selected as healthy control (HC) group. The mean kurtosis (MK) value, axial kurtosis (Ka) value, radial kurtosis (Kr) value, mean diffusivity (MD) value, axial diffusivity (Da) value, radial diffusivity (Dr) value and fractional anisotropy (FA) value of brain nuclei DKI parameters in PD group and HC group were compared, and the correlation with Mini-mental State Examination (MMSE) score was compared. Results Except the Ka value of the red nucleus, the Kr value of the thalamus, putamen and globus pallidus, the other DKI parameters of the red nucleus, substantia nigra, thalamus, putamen, globus pallidus and caudate nucleus among the DKI parameters of the two groups were significantly different (P＜0.05). The area under the curve (AUC) of the MK value of the red nucleus and substantia nigra in PD patients is the largest, followed by the MD value of substantia nigra, Ka value of substantia nigra, Dr value of substantia nigra and MK value of red nucleus according to the area under the curve (AUC). The AUC were 1.000, 0.992, 0.818, 0.808 and 0.791, respectively. The correlation analysis between DKI parameters and MMSE score showed that MK value of substantia nigra (r=0.572, P=0.043) and MD value (r=0.827, P=0.039), MK value of red nucleus (r=0.738, P=0.042) and MD value (r=0.899, P=0.031) are positively correlated with MMSE score, and there was no significant correlation between other DKI parameters and MMSE score. Conclusions The DKI can be used in the diagnosis of PD, and the parameters of substantia nigra DKI can be used as a priority index for the differential diagnosis of PD and guiding the severity of PD.]]> Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.016 P＞0.05). With the increase of glioma grade, ADC and MD decreased, while MK, Ka, Kr increased (all P＜0.05); the glioma grade was significantly negatively correlated with ADC and MD, and significantly positively correlated with Ka and Kr (all P＜0.05). As of October 2021, 40 cases of the 82 glioma patients survived and 42 cases died. In the death group, the proportion of high-grade glioma, multiple lesions, obvious edema, and obvious enhancement, as well as MK, Ka, and Kr, were higher than those in the survival group, and ADC was lower than that in the survival group (P＜0.05). Multivariate logistic regression analysis showed that glioma grade, peritumoral edema, tumor enhancement, ADC, and MK were prognostic factors (P＜0.05). The area under the curve of MK for predicting the prognosis of glioma patients was 0.835 (95% CI: 0.690-0.961), and the sensitivity and specificity were 86.6% and 80.5% when 0.550 was used as the cut-off value; the area under the curve of ADC predicting the prognosis was 0.789 (95% CI: 0.633-0.945), the sensitivity and specificity were 82.9% and 76.8% when the cut-off value was 1.240; the area under the curve of MK combined with ADC for predicting prognosis was 0.903 (95% CI: 0.808-0.994), the sensitivity and specificity were 93.9% and 85.4%. Conclusions The DWI combined DKI can non-invasively evaluate the proliferation activity and water molecule diffusion information of glioma cells, and has a high evaluation value for the grading diagnosis and prognosis evaluation of glioma. The combination of MK and ADC can effectively predict the prognosis of glioma patients.]]> Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.017 P＜0.001; T2WI+DWI: Kappa=0.693, P＜0.001). Compared with T2WI, T2WI combined with DWI increased the sensitivity (86.4% vs. 82.9%), specificity (83.9% vs. 77.1%), negative predictive value (89.7% vs. 79.4%), Jorden index (70.3% vs. 60.0%) and total coincidence rate (84.9% vs. 80.2%) of mrTRG. High T stage, T2WI high signal intensity, MRF+ and EMVI+ reduced the sensitivity, specificity, positive predictive value, negative predictive value, Jordon index and total coincidence rate of mrTRG in varying degrees (except the effect of high T2WI signal on mrTRG sensitivity). Conclusions T2WI combined with DWI can improve the diagnostic efficiency of mrTRG. High T stage, T2WI high signal intensity, MRF+, EMVI+ before neoadjuvant chemoradiotherapy will reduce the accuracy of mrTRG assessment.]]> Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.018 3 respectively. The nonperfused volume ration (NPVR) of the four subtypes were 47.78%, 39.98%, 88.57%, and 32.47% respectively. The differences of EEF and NPVR of the four subtypes were statistically significant (P＜0.05). The differences of abortion history, fertility history and MRI characteristics of the four subtypes were statistically significant (P＜0.05), and the differences of treatment time, irradiation time,irradiation dose, lesion volume and ablation volume of the four subtypes after HIFU ablation were statistically significant (P＜0.05). Conclusions The difference of NPVR and EEF among the four subtypes after HIFU ablation was statistically significant (P＜0.05). Therefore, this classification based on pathology and MRI is helpful for clinical preoperative decision-making.]]> Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.027 Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.028 Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.029 Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.030 Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.031 Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.032 Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.033 Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.034 Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.035 Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.036 Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.037 Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.038 Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.039 ^,s anus and avoiding unnecessary surgical complications. Therefore, a noninvasive and reliable evaluation method is needed to determine tumor response after nCRT. MRI plays a crucial role in the initial staging of rectal cancer and in reassessing tumor response to nCRT. At present, the evaluation methods mainly include conventional MRI, functional MRI and MRI based on artificial intelligence prediction model. This paper comprehensively elaborated the research progress of the above three evaluation methods in predicting tumor response after neoadjuvant therapy for locally advanced rectal cancer.]]> Tue,20 Sep 2022 00:00:00 GMT http://med-sci.cn/cgzcx/en/en_articlexml.asp?doi=10.12015/issn.1674-8034.2022.09.040 ^,s mobility. At present, it is easy to miss the diagnosis of cartilage injury by conventional MRI scanning, and it is difficult to quantitatively evaluate the degree of cartilage injury. However, functional MRI (fMRI) can reflect the pathophysiological abnormalities of articular cartilage, and it has a high application prospect in early diagnosis and severity grading of ankle cartilage injury. To address this issue, this paper reviews the latest advances in the clinical application of fMRI techniques of ankle cartilage, in order to broaden the application scope of fMRI in early diagnosis and curative effect prediction of ankle cartilage.]]> Tue,20 Sep 2022 00:00:00 GMT