126
|
Sjöstrand H, Alhassan E, Conroy S, Duan J, Hellesen C, Pomp S, Österlund M, Koning A, Rochman D. Total Monte Carlo evaluation for dose calculations. RADIATION PROTECTION DOSIMETRY 2014; 161:312-315. [PMID: 24277871 DOI: 10.1093/rpd/nct296] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Total Monte Carlo (TMC) is a method to propagate nuclear data (ND) uncertainties in transport codes, by using a large set of ND files, which covers the ND uncertainty. The transport code is run multiple times, each time with a unique ND file, and the result is a distribution of the investigated parameter, e.g. dose, where the width of the distribution is interpreted as the uncertainty due to ND. Until recently, this was computer intensive, but with a new development, fast TMC, more applications are accessible. The aim of this work is to test the fast TMC methodology on a dosimetry application and to propagate the (56)Fe uncertainties on the predictions of the dose outside a proposed 14-MeV neutron facility. The uncertainty was found to be 4.2 %. This can be considered small; however, this cannot be generalised to all dosimetry applications and so ND uncertainties should routinely be included in most dosimetry modelling.
Collapse
|
127
|
Shen S, Benhabib S, Duan J, Keene K, Delossantos J, Meredith R. Variation in Boost Dose to Breast Cancer Tumor Bed in Deep Inspiration Breath-Hold Radiation Therapy Evaluated With Feedback-Guided CBCT. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
128
|
Duan J, Shen S, Wu X, Huang M, Benhabib S, Cardan R, Popple R, Brezovich I. SU-E-T-417: A Method for Predicting and Correcting the Dosimetric Effect of a Radiotherapy Treatment Couch in Actual Treatment Position. Med Phys 2014. [DOI: 10.1118/1.4888750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
129
|
Benhabib S, Duan J, Wu X, Cardan R, Shen S, Huang M, Popple R, Brezovich I. SU-E-T-98: Dependence of Radiotherapy Couch Transmission Factors On Field Size and Couch-Isocenter Distance. Med Phys 2014. [DOI: 10.1118/1.4888428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
130
|
Popple R, Cardan R, Duan J, Wu X, Shen S, Brezovich I. SU-E-T-27: A Tool for Routine Quality Assurance of Radiotherapy Dose Calculation Software. Med Phys 2014. [DOI: 10.1118/1.4888357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
131
|
Brezovich I, Wu X, Duan J, Benhabib S, Huang M, Shen S, Cardan R, Popple R. WE-G-BRD-08: End-To-End Targeting Accuracy of the Gamma Knife for Trigeminal Neuralgia. Med Phys 2014. [DOI: 10.1118/1.4889492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
132
|
Shen S, Kim R, Benhabib S, Araujo J, Burnett L, Duan J, Popple R, Wu X, Cardan R, Brezovich I. SU-E-T-507: Interfractional Variation of Fiducial Marker Position During HDR Brachytherapy with Cervical Interstitial Needle Template. Med Phys 2014. [DOI: 10.1118/1.4888840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
133
|
Brezovich I, Popple R, Duan J, Huang M, Benhabib S, Shen S, Cardan R, Wu X. SU-E-J-138: An IGRT QA Device for Measuring with Tenths-Millimeter Accuracy KV and MV Isocenter Congruence, Couch Travel and Laser Alignment of Accelerators Used for SRS and SBRT. Med Phys 2014. [DOI: 10.1118/1.4888191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
134
|
Wu X, Duan J, Popple R, Cardan R, Huang M, Benhabib S, Shen S, Brezovich I. SU-E-T-259: Particle Swarm Optimization in Radial Dose Function Fitting for a Novel Iodine-125 Seed. Med Phys 2014. [DOI: 10.1118/1.4888590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
135
|
Zhang J, Zhang P, Ni X, Bao B, Huang C, Wu Y, Ni M, Duan J, Chen J. Vitamin D status in chronic dialysis patients with depression: a prospective study. BMC Psychiatry 2014; 14:125. [PMID: 24774860 PMCID: PMC4014207 DOI: 10.1186/1471-244x-14-125] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Accepted: 04/22/2014] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Depression is the most widely acknowledged psychological problem among end-stage renal disease (ESRD) patients. Depression may be associated with VD deficiency. The aims of this study are to (a) elucidate the prospective association between HsCRP, VD contents and depressive symptoms in the dialyzed population, and (b) find the effect of calcitriol supplementation on depression in dialyzed patients. METHODS In this prospective study, 484 dialysis patients (382 hemodialysis [HD] cases and 102 peritoneal dialysis [PD] cases; aged 18-60 years) from two hospitals in southeast China were included. The depression in these patients was evaluated using the Chinese version of Beck's Depression Inventory (BDI). All subjects answered the BDI-I questionnaire for assessment of depression levels in summer. A cut-off value of 16 was set to include dialysis patients with depression. All patients were divided into two groups depending on the absence (Group 1) or presence (Group 2) of depression. The two groups took 0.5 μg/day 1,25-Dihydroxyvitamin D orally for one year. BDI Scores were recalculated for all patients. Sociodemographic, clinical data, and serum VD contents were also collected. RESULTS A total of 484 participants (247 men [51.0%] and 237 women [49.0%]) were surveyed. Depressive symptoms were found in 213 (44.0%) patients. The baseline serum VD level (VD2 + VD3) was 17.6 ± 7.7 nmol/L. Patients with depressive symptoms have significantly higher serum HsCRP level and significantly lower serum VD level compared with the control group. After one-year follow-up, the supplementation of 0.5 μg/day calcitriol slightly improved the microinflammatory state such as lowering mean serum HsCRP level and improving serum VD level, but not in significantly enhancing the depressive symptoms. CONCLUSIONS Calcitriol supplementation did not significantly enhance the depressive symptoms in our dialyzed population although patients with low levels of serum VD were more depressed. Therefore, more prospective randomized controlled trials are necessary to reveal the exact cause-and-effect relationship between VD status and depressive symptoms or VD status related to some specific subtypes in dialyzed patients.
Collapse
|
136
|
Chen H, Duan J, Zuo F. Mechanism of the reversal effect of mifepristone on drug resistance of the human cervical cancer cell line HeLa/MMC. GENETICS AND MOLECULAR RESEARCH 2014; 13:1288-95. [PMID: 24634186 DOI: 10.4238/2014.february.27.14] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We examined the ability of mifepristone to reverse the in vitro drug resistance of human cervical cancer cells resistant to mitomycin-C (HeLa/MMC) cells and investigated the mechanism of this effect. A 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay was performed to detect the drug resistance of HeLa/MMC cells and the reversed drug resistance in vitro. Expression levels of B-cell lymphoma 2 (Bcl-2), Bcl-2-associated X protein (Bax), and glucosylceramide synthase (GCS) were measured in HeLa and HeLa/MMC cells. The resistance index of HeLa/MMC cells on MMC was reduced from 5.02 to 1.46 after 10 mg/mL mifepristone exposure. A combination of mifepristone upregulated the Bax/Bcl-2 protein expression ratio and apoptosis in HeLa/MMC cells. GCS expression was significantly higher in HeLa/MMC cells than in HeLa cells (P < 0.01), but distinctly declined in both cell lines after mifepristone application (P < 0.01). Mifepristone reversed the resistance of HeLa/MMC cells to MMC in vitro; the overexpression of the GCS gene and the increased expression of apoptosis-related protein Bcl-2 may play important roles in the formation of multidrug resistance in cervical cancer.
Collapse
|
137
|
Zhang J, Zhang Q, Zhao W, Duan J, Huang T. Pleural resection and pleural infusion chemotherapy for therapy of malignant pleural mesothelioma. GENETICS AND MOLECULAR RESEARCH 2014; 13:483-9. [PMID: 24535876 DOI: 10.4238/2014.january.21.17] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The aim of this study was to evaluate effective treatment methods of malignant pleural mesothelioma (MPM). Twenty-three patients with MPM were cured by pleural infusion chemotherapy after surgery. Median survival time and the 1-, 2-, and 3-year survival rates were analyzed on the basis of follow-up. Median survival time of all patients was 15 months (range: 3 to 89 months); the 1-, 2-, and 3-year survival rates were 69.6, 43.5, and 13.0%, respectively. The 1-year survival rates of patients in stages I, II, and III were 83.3, 62.5, and 33.3%, respectively, the 2-year survival rates were 50, 37.5, and 33.3%, respectively, and the 3-year survival rates were 34, 23, and 0%, respectively. Surgery-oriented comprehensive treatment was adopted for MPM, which could improve the prognosis and life quality of patients to some extent.
Collapse
|
138
|
Dang Y, Lin G, Xie Y, Duan J, Ma P, Li G, Ji G. Quantitative Determination of Myricetin in Rat Plasma by Ultra Performance Liquid Chromatography Tandem Mass Spectrometry and its Absolute Bioavailability. Drug Res (Stuttg) 2013; 64:516-22. [DOI: 10.1055/s-0033-1363220] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
139
|
Yin J, Ren W, Liu G, Duan J, Yang G, Wu L, Li T, Yin Y. Birth oxidative stress and the development of an antioxidant system in newborn piglets. Free Radic Res 2013; 47:1027-35. [PMID: 24074241 DOI: 10.3109/10715762.2013.848277] [Citation(s) in RCA: 141] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Birth oxidative stress is an oxidative response to a sudden transition process from maternal mediated respiration in uterus to autonomous pulmonary respiration outside the uterus. Meanwhile, oxidative stress has been demonstrated to be associated with various pathologies recorded in newborns. So, this research aimed to study the oxidative stress and the development of antioxidant system in newborn piglets. The measured variables include plasma lipid, protein and DNA oxidant injury, the activities of plasma antioxidant enzymes and the jejunal and ileal antioxidant gene expressions at 1, 7, 14, and 21 days after birth. Meanwhile, the nuclear factor erythroid 2-related factor 2 (Nrf2), transcription factor p65, and tumor protein 53 (p53) were determined by western blot. The results showed that newborn piglets suffered seriously from birth oxidative stress because of the naive antioxidant system. In addition, oxidant injury activated Nrf2 signaling pathway, resulting in the expression of antioxidant genes and release of antioxidant enzymes. With the development of antioxidant system, the oxidative balance gradually recovered on Day 7 after birth. In conclusion, birth caused oxidative stress and the oxidative balance gradually recovered with the development of antioxidant system.
Collapse
|
140
|
Baden C, Whitley A, López-Araujo J, Popple R, Duan J, Kim R. Institutional Outcomes for Para-aortic Node-Positive Cervical Cancer Patients Treated With a Novel Dynamic Field-Matching Technique. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.1088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
141
|
Popple R, Wu X, Yuan Y, Cardan R, Duan J, Shen S, Brezovich I. SU-E-T-561: Small Target Dose Calculation Accuracy for Multiple-Target Single-Isocenter VMAT. Med Phys 2013. [DOI: 10.1118/1.4814990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
142
|
Wu X, Popple R, Yuan Y, FIveash J, Shen S, Duan J, Cardan R, Brezovich I. SU-E-P-14: A Practical Approach of Small Field Dosimetry Measurement for Patient-Specific IMRT/SRS/SBRT. Med Phys 2013. [DOI: 10.1118/1.4814088] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
143
|
Shen S, Duan J, Keene K, Yuan Y, Klepczyk L, Meredith R. SU-E-J-128: Setup Variation in Deep Inspiration Breath-Hold for Radiotherapy of Breast Cancer Tumor Bed Assessed with RPM-Guided CBCT. Med Phys 2013. [DOI: 10.1118/1.4814340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
144
|
Benhabib S, Kim R, Duan J, Burnett L, Popple R, Wu X, Cardan R, Brezovich I, Shen S. SU-E-T-344: Interfractional Needle Displacement During HDR Brachytherapy for Patients with Gynecological Cancer Using Interstitial Needle Template. Med Phys 2013. [DOI: 10.1118/1.4814778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
145
|
Cardan R, Popple R, Wu X, Duan J, Shen S, Brezovich I. SU-E-T-227: Feasibility of Collision Avoidance Using In Room 3D Camera. Med Phys 2013. [DOI: 10.1118/1.4814662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
146
|
Duan J, Shen S, Yuan Y, Wu X, Cardan R, Popple R, Brezovich I. SU-E-T-601: Optimal Beam Selection for Intensity Modulated Radiation Therapy: High Intensity Flattening-Filter Free Versus Conventional Flattened Beams. Med Phys 2013. [DOI: 10.1118/1.4815029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
147
|
Yuan Y, Duan J, Klepczyk L, Meredith R, Wu X, Cardan R, Brezovich I, Shen S. SU-E-T-622: Feasibility of Partial Volumetric Modulated Arc Therapy for Boost Treatment of Breast Cancer. Med Phys 2013. [DOI: 10.1118/1.4815050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
148
|
Xu F, Zhou T, Duan J. Predictive Factors Associated with Gefitinib Response in Patients with Advanced Non-Small-Cell Lung Cancer (NSCLC). Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)32050-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
|
149
|
Cardan R, Popple R, Duan J, Shen S, Wu X, Brezovich I. MO-D-BRB-06: JUNIOR INVESTIGATOR WINNER - Fast and Accurate Patient Specific Collision Detection for Radiation Therapy. Med Phys 2012; 39:3867. [DOI: 10.1118/1.4735787] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
150
|
Shen S, Kim R, Duan J, Wu X, Popple R, Cardan R, Brezovich I. SU-E-T-433: Pear-Shaped Based Dose Optimization for HDR Intracavitary Brachytherapy for Cervical Cancer Patients with Small Uterus. Med Phys 2012; 39:3804. [DOI: 10.1118/1.4735522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|