Objective:To explore the efficiency of MR psychoradiology examination in screening and classification of psychiatric disorders as well as its potential clinical application.Methods:Retrospective study was conducted for 144 patients with MR psychoradiology examination, who were diagnosed mental disorders based on International Statistical Classification of Diseases and Related Health Problems Tenth Revision (ICD-10) from September 2018 to July 2020 in West China Hospital of Sichuan University. As our previous studies, imaging diagnostic models were constructed based on gray matter volume (GMV) analysis for four kinds of psychiatric disorders, including depression, anxiety disorder, bipolar disorder and schizophrenia. For 120 patients with psychiatric disorders, the GMV change pattern of brain regions was detected and subtyped by MR psychoradiology examination with 50% similarity threshold of the above imaging diagnostic models. The diagnostic efficiency of MR psychoradiology examination was evaluated with references of clinical diagnose. For 24 patients with dementia, brain atrophy was additionally measured by conventional MR examination and MR psychoradiology examination respectively.Results:The sensitivity, specificity, Youden index and accuracy of MR psychoradiology in identifying the four psychiatric disorders were 86.6% (84/97), 69.6% (16/23), 0.56 and 83.3% (100/120), including depression [77.8% (28/36), 69.0% (58/84), 0.47, 71.7% (86/120)], schizophrenia [58.8% (10/17), 91.3% (94/103), 0.50, 86.7% (104/120)], bipolar disorder [42.1% (8/19), 96.0% (97/101), 0.38, 87.5% (105/120)] and anxiety disorder [24.0% (6/25), 100% (95/95), 0.24, 84.2% (101/120)]. As for 24 patients with dementia, 58.3% (14/24) were detected with brain atrophy by conventional MR examination, while 91.7% (22/24) were detected by MR psychoradiology examination.Conclusions:MR psychoradiology can detect the subtle brain structural abnormalities of patients with mental disorders. Although it can′t be used as an independent biomarker for disease diagnosis till now, it is of great help in improving the accuracy and objectivity of diagnosis.

The present study was aimed to investigate the function of diffusion weight imaging (DWI) combining with magnetic resonance spectroscopy (MRS) in the grading of brain gliomas. 12 cases low grade and 17 cases high grade of brain gliomas patients were examined with DWI and MRS, with all tumors confirmed by pathology in advance. The apparent diffusion coefficient (ADC) values, their corresponding metabolite ratios of Cho/Cr, Cho/NAA and tumor cellularities of tumor solid enhanced parts were measured. The ratios of Cho/Cr and Cho/NAA and their corresponding ADC values had significant differences between their high and low grade gliomas values, respectively. The ADC values demonstrated a negative correlation with Cho/Cr, Cho/NAA, and a significant negative correlated with Cho/Cr. And the ADC values demonstrated strong negative correlations with tumor cellularities. DWI combining with MRS could provide more valuable information in evaluating gliomas grading.
Adolescent ; Adult ; Aged ; Brain Neoplasms ; diagnosis ; pathology ; Child ; Diffusion Magnetic Resonance Imaging ; methods ; Female ; Glioma ; diagnosis ; pathology ; Humans ; Hydrogen ; Magnetic Resonance Spectroscopy ; methods ; Male ; Middle Aged ; Neoplasm Grading ; Young Adult

This retrospective investigation was directed to the applicability of Radial Basis Function Neural Network (RBF-NN) and Discriminant Analysis in the grading of gliomas. The data on 116 patients with primary glioma in our hospital from February 2008 to April 2009 were collected. Kruskal-Wallis H test was used to draw in the variable age ranks and then to take them out from the range of different grades of gliomas. The results of RBF-NN model, discriminant analysis, and the combined model of RBF-NN and discriminant analysis were evaluated and compared respectively with and without age. In this study, different classifications of gliomas showed statistically significant differences in age: and the accuracy of the models with age was better than the ones without age. The predictive accuracy and Kappa value of RBF-NN model and the combined model were also better than those exhibited by Bayes discriminant analysis. Consequently, as a prediction model, or to help other models, RBF-NN is of significance to predicting the grade of gliomas.
Brain Neoplasms ; pathology ; Glioma ; pathology ; Humans ; Image Processing, Computer-Assisted ; Magnetic Resonance Imaging ; Neoplasm Grading ; Neural Networks (Computer)

Background and purpose: Astrocytoma is the most common neuroepithelial neoplasm, and its grading has profound effect on its treatment and prognosis. To investigate the application of stepwise discriminant analysis in grading astrocytomas, this study developed two models of stepwise discriminant analysis according to relevant factors of astrocytoma. Methods: From January 2008 to April 2009, 111 primary astrocytoma patients were enrolled. Each patient was scored based on location, signal intensity on T1WI, signal intensity on T2WI, enhancement, edema, border, cyst or solidness, and mass effect of their magnetic resonance images. With their age score of grading, Fisher stepwise discriminant analysis and the Logistic discdminant were used. The results from the two models were then evaluated and compared. Results: According to Fisher stepwise diseriminant analysis, the predictive accuracy was 87.7% with 80.0% sensitivity, 91.5% specificity and 0.942 area of ROC curve. However, the predictive accuracy of Logistic discriminant analysis was 84.9% with 80.0% sensitivity, 86.8% specificity and 0.940 area of ROC curve. There were no statistically significant differences in terms of accuracy (P=0.250) and areas under ROC curve (Z=0.433, P=0.665) between the two models. Conclusion: Two stepwise discriminant analysis models are meaningful to predict the grading of astrocytoms, and the application of Fisher stepwise discriminant analysis is simpler than the Logistic discriminant analysis.

Objective To muhi-directionally visualize and measure the normal anatomy of palatovaginal canal and its communications with high-resolution multi-slice spiral CT and its post-processing technologies.Methods One hundred and sixty-seven subjects with normal PPF and its communications were examined by 16-MSCT using high-resolution technique.The MPR and CPR images of palatovaginal canal were obtained on postproeessing workstation.The length and diameter of the palatovaginal canal and its communications was measured and analyzed with one way ANOVA analysis and independent samples t test.Results In this study, the detection rate of palatovaginal canal on 167 subjects was 98.8% (330/334).The mean length of left and right palatovaginal canal was (1.18 ± 0.22) cm and (1.07 ± 0.29) cm, respectively.The mean diameter of anterior opening (0.19±0.06)cm was significantly larger than median (0.10 ± 0.04) cm and posterior opening (0.16 ± 0.07)cm in left palatovaginal canal (F = 211.109, P < 0.01).Similarly,The mean diameters of anterior, median and posterior opening in right palatovaginal canal were (0.19±0.06)cm, (0.10±0.03)cm and(0.16±0.06) cm, respectively (F = 139.350,P <0.01).No significant difference on length measurements was revealed between the men [left: (1.18±0.22) cm; right: (1.12 ± 0.31)cm] and women [left: (1.07±0.25)cm; fight: (1.02±0.25)cm] (left: t = 0.919, P > 0.05 ;right:t = 1.117,P > 0.05).Between the men [left: (0.19±0.06) cm, (0.10 +0.04) cm and (0.16±0.07) cm; right: (0.19±0.06) cm,(0.10±0.04) cm,(0.16±0.06) cm] and women [left: (0.20±0.08) cm, (0.10±0.04) cm and (0.15±0.05) cm; right: (0.20±0.06) cm, (0.09± 0.04) cm and (0.15±0.05) cm], no significant difference on diameter measurements was revealed (left: t =- 1.183,0.190 and 1.660 ; fight: t = - 1.420,1.210 and 0.802 ; all P > 0.05).Conclusion On the basis of high-resolution MDCT scan, MPR and CPR images could visualize clearly the morphologic features of the palatovaginal canal, which may be helpful for making diagnostic and therapeutic decisions because more imaging information could be obtained.

The open reading frame of Spinacia oleracea Betaine Aldehyde Dehydrogenase (SoBADH) was retrieved from Spinacia oleracea and inserted into the Agrobacterium tumefaciens binary vector pBin438, which was driven by CaMV35S promoter, and produced the new binary vector pBSB. A. tumefaciens LBA4404 carrying this plasmid was used in genetic transformation of plants. Forty-five primary transgenic plants were detected by PCR and verified by the Southern blotting from 65 regenerated plants, of which 27 transgenic plants had only one copy of T-DNA. The Northern blotting and Western blotting analysis indicated that the SoBADH gene had been transcribed mRNA and expression protein in the transgenic cotton lines. The testing of SoBADH activity of transgenic plant leaves showed that the enzyme activity was much higher than that of the non-transgenic cotton. The growth of transgenic plants was well under the salinity and freezing stress, whereas the non-transgenic plant grew poorly and even died. Challenging with salinity, the height and fresh weight of transgenic plants was higher compared with those of non-transgenic plants. Under the freezing stress, the relative conductivity of leaf electrolyte leakage of the transgenic cotton lines was lower than that of non-transgenic plants. These results demonstrated that the SoBADH gene could over express in the exogenous plants, and could be used in genetic engineering for cotton stress resistance.
Adaptation, Physiological ; Betaine-Aldehyde Dehydrogenase ; biosynthesis ; genetics ; Cold Temperature ; Gossypium ; enzymology ; genetics ; Plants, Genetically Modified ; enzymology ; genetics ; Salinity ; Spinacia oleracea ; enzymology ; genetics ; Stress, Physiological ; genetics

OBJECTIVE To study the incidence of ?-lactamases,mainly the extended-spectrum beta-lactamases(ESBLs) and metallo-beta-lactamases(MBLs) of Chryseobacterium indologenes and Ch.gleum.METHODS Agar dilution method was applied to detect minimal inhibitory concentrations(MIC) to 12 different antibiotics used frequently.Three-dimensional test was used to detect ESBLs and metallo-?-lactamases.The genes of ?-lactamases were amplified with 3 pairs of primers special for Ch.indologenes and Ch.gleum.RESULTS Among the 25 strains of Ch.indologenes and 10 strains of Ch.gleum,68%(17/25) isolates of Ch.indologenes and 90%(9/10)isolates of Ch.gleum were considered as MBLs positive strains,but no isolates were detected for the production of ESBLs.CONCLUSIONS MBLs are the important mechanism of multi-drug resistance for Ch.indologenes and Ch.gleum.

To investigate CT features of palatal malignant tumors and to evaluate, CT diagnostic value. CT manifestations of 32 cases of palatal malignant tumors were analyzed retrospectively. All cases were confirmed by pathology. There were 27 males and 5 females between 23 and 80 years of age. Axial contrast enhancement CT scan was performed in all cases, among them, nonenhancement CT scan was also performed in 8 cases and coronal CT scan was performed in 2 cases. The main signs of palatal malignant tumors were as follows: (1) Masses in palate in 26 cases, thickened palatal soft tissue in 6 cases and destruction of palate bone in 8 cases. The lesions were located in soft palate in 22 cases, in hard palate in 4 cases, and in the junction region between soft and hard palate in 3 cases; (2) Other adjacent structures and organs were involved in 27 cases; (3) Lymph nodes of neck metastasis were demonstrated in 17 cases. CT is an excellent technique, which can show the gross pathologic features and the invasion pathway of palatine malignant tumors, and it can provide some important information for the relevant clinical treatment and prognosis.
Adult ; Aged ; Aged, 80 and over ; Carcinoma, Squamous Cell ; diagnostic imaging ; secondary ; Female ; Humans ; Image Enhancement ; Lymphatic Metastasis ; Male ; Middle Aged ; Palatal Neoplasms ; diagnostic imaging ; pathology ; Prognosis ; Retrospective Studies ; Tomography, X-Ray Computed

The CT and MRI manifestations of pachygyria and agyria are presented with a review of the pathological features of the disorders and an evaluation of the diagnostic value of both imaging modalities. 15 cases were analysed retrospectively; of them, 12 were examined with CT and 3 with MRI. The analyses confirm 7 cases with agyria, 5 with pachygyria of bilateral cerebral hemisphere and 3 with limited pachygyria of unilateral hemisphere. On CT and MRI of the whole lesions, the cortex is thickened and the white matter is reduced in proportion. The surface of the brain remains flat and smooth or shows only a few broad gyri and shallow sulci. The border between gray and white matter is smooth. In 12 patients with agyria and pachygyria of the whole brain, the sylvian fissures are shallow, and insulae are exposed. The middle cerebral arteries course superficially along sylvian grooves close to the inner table of the skull. The cerebral contour is "hourglass" or "figure of eight". Associated brain anomalies include the heterotopia of gray matter in 5 cases, the schizencephaly (type I) in 2 cases and the agenesis of the corpus callosum in one case. In conclusion, the pathological changes of pachygyria and agyria are characteristics. CT and MRI are excellent modalities to evaluate these pathological features.
Adolescent ; Adult ; Brain ; abnormalities ; diagnostic imaging ; pathology ; Cerebral Cortex ; abnormalities ; diagnostic imaging ; pathology ; Child ; Child, Preschool ; Female ; Humans ; Infant ; Magnetic Resonance Imaging ; Male ; Tomography, X-Ray Computed

Objective　To study the scan technique that can completely demonstrate the structures of middle-inner ear.Methods　Ninety volunteers underwent 30° axial and 105° coronal HRCT scan.The manifestations of the ministructures of middle-inner ear were observed and their demonstration rate was calculated.The demonstration of different structures of middle-inner ear was evaluated and compared on HRCT.Results　(1)The scan planes of 30° axial and 105° coronal were correspondent to some structures of middle-inner ear and could completely demonstrate them.(2)30° axial and 105° coronal HRCT scan had their own advantages respectively in demonstrating the structures of middle-inner ear.Conclusion　The technique of 30° axial and 105° coronal HRCT scan of middle-inner ear is useful in demonstrating the structures,including the nerve,joint,ligament etc and the relationship among them.