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Objective:To compare the comprehensive performance of three Varian on-board image (OBI) image systems (KV-CBCT, KV-planar and MV-EPID) and to explore the value of the combined application of these three systems in daily image-guided radiotherapy for nasopharyngeal cancer.Methods:KV-CBCT, KV-planar and MV-EPID scanning and registration were carried out in the left and right/abdominal and back/head and foot direction on human head and neck phantom. The set-up error, registration time, additional radiation dose and image quality of the three systems were compared by F-test.Results:KV-CBCT, kV-planar and MV-EPID were scanned for 55 times, respectively, and the set-up errors in the left and right/abdominal and back/head and foot direction of the three image-guided systems were (0.00±5.43)/(-0.02±5.49)/(0.02±5.58) mm, (0.04±5.49)/(0.02±5.56)/(0.02±5.54) mm, (0.02±5.22)/(0.11±5.34)/(-0.04±5.33) mm, respectively ( P=0.999, 1.000, 0.989). The average time consuming was (200±45) s, (120±36) s and (115±42) s; the additional radiation dose from low to high was kV-planar, KV-CBCT and MV-EPID; the image quality from low to high was MV-EPID, kV-planar and KV-CBCT. Conclusions:Three image-guided systems can meet the requirements of image-guided radiotherapy for nasopharyngeal cancer. Based on the overall performance of the three systems, 1 CBCT+ 4 kV planar per week is recommended and EPID should be used as a backup system in daily image-guided radiotherapy for nasopharyngeal cancer. This scheme makes full use of the high image quality of CBCT and the low radiation of kV planar to realize the regular detection of nasopharyngeal cancer volume change and the implementation of high-precision radiotherapy.
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Objective:To investigate relationships between social support and dysfunctional cognition, personality disorder in patients with somatoform disorder.Methods:One hundred and four patients with somatoform disorders and 97 healthy subjects were evaluated with the Social Support Rating Scale (SSRS), Dysfunctional Attitudes Scale (DAS) and Personality Diagnostic Questionnaire (PDQ-4). Social support ratings were compared between patients and healthy controls.The relationship between social support and dysfunctional cognition, personality disorder were analyzed.Results:The scores of social support in all dimensions of patients with somatoform disorder(total score of social support(37.18±8.12), objective social support(8.49±2.83), subjective social support(21.90±5.44), social support utilization(6.79±1.85)) were significantly lower than those in the healthy control group(total score of social support(41.82±6.87), objective social support(9.92±3.38), subjective social support(24.32±4.25), social support utilization(7.59±1.31))( P<0.05). In patients with somatoform disorder, there was a significant negative correlation between the total score of SSRS and the scores of DAS ( r=-0.245, P<0.05) and personality disorder tendency ( r=-0.292, P<0.01). Social support utilization had a significant predictive effect on dysfunctional cognition ( B=-5.384, P=0.007). Conclusion:Social support of patients with somatoform disorder is correlated with dysfunctional cognition and personality disorder tendency, which provides the basis for psychological intervention such as group and family psychotherapy.
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Objective To examine the characteristics of dysfunctional attitudes in patients with so?matoform disorders and to delineate the relationship between dysfunctional attitudes and personality disorder tendency. Methods Sixty?four outpatients with somatoform disorder and 52 healthy individuals were recrui?ted and asked to complete the Personality Diagnostic Questionnaire( PDQ?4) and the Dysfunctional Attitudes Scale( DAS ) for the evaluation of their personality disorder tendency and cognitive characteristics. DAS scores were compared between patient and control groups. The relationship between DAS and PDQ?4 was e?valuated by comparing DAS scores of patients with and without personality disorder tendency and by correla?ting patients’ total scores of DAS and PDQ?4. Results Patients with somatoform disorder(150.13±31.75) showed significantly higher scores of DAS than healthy controls(121.62±20.30). Moreover,patients with per?sonality disorder tendency exhibited significantly higher scores in the total score of DAS and scores of five factors including vulnerability, absorption/exclusive, compulsion, dependence and cognitive philosophy ( P<0.05) . Finally,a positive correlation was found between total scores of DAS and PDQ?4( r=0.535, P<0.01) and the correlation coefficients between the total score of DAS and Cluster A( r=0.545) and C scores( r=0.625) were significantly higher than that of Cluster B score( r=0.317).Conclusion Patients with somato?form disorders have cognitive distortion,which is correlated with personality disorder tendency.
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OBJECTIVE@#To investigate the clinical application value of cone-beam CT (CBCT) online correcting technology in volume modulated radiation therapy (VMRT) for nasopharyngeal carcinoma (NPC).@*METHOD@#Fifty NPC patients applying head neck and shoulder thermoplastic body membrane fixing device were eligible for treatment VMRT, these patients would accept a couple of CBCT scanning by on board imager (OBI) in a fixed time each week after initial setup and after online correcting during the first three week for radiotherapy, CBCT images and DRR images constructed by CT simulation were carried out registration,which could calculate the setup errors of initial setup and after online correcting.@*RESULT@#Fifty patients were accepted 150 scanning after initial setup and 150 scanning after online correcting respectively, the errors after initial setup were (-1.24 ± 1.25)mm in X direction, (1.19 ± 1.85)mm in Y direction, (1.49 ± 1.70) mm in Z direction. The setup errors after online correcting were (-0.13 ± 0.29)mm in X direction, (0.10 ± 0.47)mm in Y direction, (0.17 ± 0.36)mm in Z direction. The setup errors after online correcting were significantly lower than the errors after initial setup in X direction (P < 0.05), Y direction (P < 0.05), Z direction(P < 0.05). The M(PTV) value after online correcting were 0.46 mm, 0.53 mm and 0.59 mm in X, Y and Z directions respectively.@*CONCLUSION@#The use of CBCT online correcting technology can significantly reduce the setup errors of VMRT for NPC and improve the treatment effect.
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Humans , Carcinoma , Cone-Beam Computed Tomography , Nasopharyngeal Carcinoma , Nasopharyngeal Neoplasms , Radiotherapy , Radiotherapy Planning, Computer-Assisted , Radiotherapy, Intensity-ModulatedABSTRACT
Objective To build the relationship model of childhood aubuse, personality, insecurity and dissociative trait in medical students. Methods Through stratified sampling,262 medical students were investiga?ted by the Personal Report of Childhood Abuse( PRCA) ,Dissociative Trait Scale( DTS) ,Self?Rating Feeling of In?security Scale( SRFIS) ,Revised NEO Five?Factor Inventory( NEO?FFI?R) . A path analysis was applied by AMOS (Analysis of Moment Structures) version 7.0. Results ①Childhood abuse was positively related to insecurity, dissociative trait and neuroticism( r=0.248~0.361, P0.05,RMSEA=0.024<0.050, GFI=0.935,AGFI=0.909,NFI=0.923,RFI=0.902,IFI=0.989,TLI=0.986 and CFI=0.989. Conclusion Per?sonality and insecurity as mediated variable mediate the relationship between childhood abuse and dissociative trait of medical students. Childhood abuse has no direct effect on dissociative trait of medical students.
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Objective To develop subjective well-being simplify scale (SWBSS),and examine its reliability and validity.Methods A self-report SWBSS containing 13 items was developed on college student and research literature.2374 college students completed SWBSS,Index of Well-Being(IWB),World Health of Organization Quality of Life Brief Scale (WHOQOL-BREF),Beck Depression Rating Scale (BDI) and Self-rating Anxiety Scale(SAS).Results ①Exploratory factor analysis results showed that SWBSS had 1 factor,and accounted for 41.768％ of variance.②Confirmatory factor analysis results indicated that x2/df =2.208,RMR =0.016,RMSEA =0.032 ; GFI =0.986,AGFI =0.974,NFI =0.978,RFI =0.966,IFI =0.988,TLI =0.981,CFI =0.988 ; PGFI =0.552,PNFI =0.639,PCFI =0.646 ; construct reliability =0.901.③The Cronbach'α coefficient,split-half reliability,stability coefficient of SWBSS was 0.876,0.817 and 0.740 (P ＜ 0.01).The SWBSS scores was significantly correlated with the scores of IWB,WHOQOL-BREF,BDI and SAS (r =0.706 ～ 0.892,r =-0.650 ～-0.580,P＜0.01).Conclusion The stability,internal consistency,and validity of the SWBSS are good and meet with psychometric standard.
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Objective To study the mediating effect of big five personality between childhood abuse and anxiety of college students, and to provide basis to intervene their mental disorder.Methods Through stratified sampling,2374 college students in Jiangsu were investigated by the personal report of childhood abuse( PRCA),self-rating anxiety scale(SAS) and the revised NEO five-factor Inventory(NEO-FFI-R).A path analysis was applied by analysis of moment structures(AMOS) version 7.0.Results The path analysis showed that childhood abuse was directly related to anxiety of college students(Sβ=0.123, P＜0.01 ＝ ,and was directly related to 4 dimensions of the NEO-FFI-R( exclusion Openness dimension) (Sβ= -0.216 ～ -0.248,0.309; P ＜ 0.01 ＝.3 dimensions of the NEO-FFI-R( exclusion Openness and Extraversion dimensions) were directly related to anxiety of college students ( Sβ = 0.525,-0.045 ～-0.052, P ＜ 0.05 ＝.Agreeableness, conscientiousness and neuroticism of NEO-FFI-R mediate the relationship between childhood abuse and anxiety of college students.The model fit indexes were x2/df = 0.546 ＜ 3.000, P = 0.460 ＞ 0.050, RMSEA = 0.001 ＜ 0.050, GFI = 1.000, AGFI = 0.998, NFI = 1.000, RFI = 0.998, IFI = 1.000,TLI = 1.002, CFI = 1.000.Conclusion Big five personality as mediated variable mediates the relationship between childhood abuse and anxiety of college students.
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Objective To study the kindness trait of personality of pupils in grade 5 and 6,and to explore its relationship with childhood abuse. Methods 172 elementary school students were investigated by applying Female had higher scores of generosity, altruism, honesty and kindness trait than male ((41.1±4.4) vs (37.6±6.6),(19.2±3.9) vs (17.1±4.6),(17.3±3.0) vs (15.3±3.5),(77.6±8.8) vss (69.9±12.6), F=tions on kindness trait(P<0.05). Sexual abuse had not predictable functions on kindness trait (P>0.05). Con-clusion There are significant differences of kindness trait among subjects with different genders. Childhood abuse can severely impact the development of kindness trait of personality in puerile.
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Objective: To study the effect of childhood abuse on students mental health and alexithymia, and to analyze the relationship between psychosomatic symptoms and alexithymia. Methods: 90 abused Technical Secondary School Students and 90 no-abused Technical Secondary School Students from Xuzhou were investigated by applying Symptom Checklist 90 ( SCL - 90 ) , Toronto alexithymia Scale ( TAS) . Results: Compared with no-abused students, the students who had been abused in childhood showed significantly higher psychiatric symptoms of somatization (1. 8?0. 6) , interpersonal relationship (2.0?0.7) , depression (1.9?0.6) , anxiety (1. 8?0. 5 ) , hostility (1. 8?0. 6) , paranoia (1. 9?0. 6) , psychoticism (1. 8?0. 6) , obsessive (2. 0?0. 6) , phobia (1. 7?0. 6) than control (1.4?0.5, 1.7?0.6, 1.6?0.6, 1.6?0.5, 1.5?0.5, 1.6?0.5, 1.6?0.5, 1.8?0.6, 1.5?0.5, P
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Objective:To study the effect of childhood abuse on student's suicide ideation and attitude to suicide. Methods:90 Technical Secondary School Students with history of being abused and 90 without that history were investigated by applying Questionnaire of Commit Suicide Attitude and Beck Scale for Suicide Ideation. Results:Compared with those without being abused, the abused students had higher percentages having suicide ideation in the past week (14.4% vs. 2.2%,?~2=7.27, P