Gotowe bibliografie tematyczne / Total body radiation

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Gotowa bibliografia na temat „Total body radiation”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 1 lutego 2022

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Artykuły w czasopismach na temat "Total body radiation"

Yasumura, S., I. E. Stamatelatos, C. N. Boozer, R. Moore i R. Ma. "In vivo body composition studies in rats: Assessment of total body protein". Applied Radiation and Isotopes 49, nr 5-6 (maj 1998): 731–32. http://dx.doi.org/10.1016/s0969-8043(97)00209-1.

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De Lorenzo, A., N. Candeloro, I. Bertini, T. Talluri i L. Pierangeli. "Total body capacity correlated with basal metabolic rate". Applied Radiation and Isotopes 49, nr 5-6 (maj 1998): 493–94. http://dx.doi.org/10.1016/s0969-8043(97)00227-3.

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Keane, J. T., D. P. Fontenla i C. S. Chui. "Applications of IMAT to total body radiation (TBI)". International Journal of Radiation Oncology*Biology*Physics 48, nr 3 (styczeń 2000): 239. http://dx.doi.org/10.1016/s0360-3016(00)80274-6.

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Quinn, T. J., i J. E. Martin. "A Black-Body Cavity for Total Radiation Thermometry". Metrologia 23, nr 2 (1.01.1986): 111–14. http://dx.doi.org/10.1088/0026-1394/23/2/004.

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Baranov, AE, GD Selidovkin, A. Butturini i RP Gale. "Hematopoietic recovery after 10-Gy acute total body radiation". Blood 83, nr 2 (15.01.1994): 596–99. http://dx.doi.org/10.1182/blood.v83.2.596.596.

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Abstract Considerable data suggest that very high doses of acute total body radiation destroy most hematopoietic stem cells and that recovery is possible only after a bone marrow transplant. We review data from a radiation accident victim exposed to about 10-Gy or more acute total body radiation. Total dose and uniformity of distribution were confirmed by physical measurements (paramagnetic resonance), computer simulation, and biologic dosimetry (granulocyte kinetics and cytogenetic abnormalities). Treatment consisted of supportive measures, transfusions, and hematopoietic growth factors (granulocyte-macrophage colony-stimulating factor and interleukin-3). Hematopoietic recovery occurred slowly. Granulocytes were detectable throughout the postexposure period, exceeding 0.5 x 10(9)/L by day 37. There was slower and incomplete recovery of red blood cells and platelets. Increases in blood cell production were paralleled by morphologic changes in bone marrow biopsies. Gastrointestinal toxicity was moderate. Death from a probable radiation pneumonitis infection occurred on day 130. These data indicate the possibility of hematopoietic recovery after approximately 10 Gy or more acute total body radiation without a transplant. They also suggest that lung rather than gastrointestinal toxicity may be dose-limiting under these circumstances.

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Considerable data suggest that very high doses of acute total body radiation destroy most hematopoietic stem cells and that recovery is possible only after a bone marrow transplant. We review data from a radiation accident victim exposed to about 10-Gy or more acute total body radiation. Total dose and uniformity of distribution were confirmed by physical measurements (paramagnetic resonance), computer simulation, and biologic dosimetry (granulocyte kinetics and cytogenetic abnormalities). Treatment consisted of supportive measures, transfusions, and hematopoietic growth factors (granulocyte-macrophage colony-stimulating factor and interleukin-3). Hematopoietic recovery occurred slowly. Granulocytes were detectable throughout the postexposure period, exceeding 0.5 x 10(9)/L by day 37. There was slower and incomplete recovery of red blood cells and platelets. Increases in blood cell production were paralleled by morphologic changes in bone marrow biopsies. Gastrointestinal toxicity was moderate. Death from a probable radiation pneumonitis infection occurred on day 130. These data indicate the possibility of hematopoietic recovery after approximately 10 Gy or more acute total body radiation without a transplant. They also suggest that lung rather than gastrointestinal toxicity may be dose-limiting under these circumstances.

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Badawi, Ramsey D., Joel S. Karp, Lorenzo nardo i Austin R. Pantel. "Total Body PET Imaging". PET Clinics 16, nr 1 (styczeń 2021): i. http://dx.doi.org/10.1016/s1556-8598(20)30086-9.

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Chondronikola, Maria, i Souvik Sarkar. "Total-body PET Imaging". PET Clinics 16, nr 1 (styczeń 2021): 75–87. http://dx.doi.org/10.1016/j.cpet.2020.09.001.

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Ning, Bingxu, Zhiyuan Hu, Zhengxuan Zhang, Zhangli Liu, Ming Chen, Dawei Bi i Shichang Zou. "The impact of total ionizing radiation on body effect". Microelectronics Journal 42, nr 12 (grudzień 2011): 1396–99. http://dx.doi.org/10.1016/j.mejo.2011.09.004.

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Stewart, F. A. "Radiation Nephropathy after Abdominal Irradiation or Total-Body Irradiation". Radiation Research 143, nr 3 (wrzesień 1995): 235. http://dx.doi.org/10.2307/3579208.

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Rozprawy doktorskie na temat "Total body radiation"

Larouche, Renée-Xavière. "Total body photon irradiation with a modified cobalt-60 unit". Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=79026.

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Following a departmental expansion, an isocentric cobalt-60 external beam teletheraphy unit was modified to produce a large fixed field for total body irradiation. The sourcehead was separated from the gantry and installed at a distance of 251.2 cm from the floor. The collimator was removed and replaced with a custom built secondary collimator projecting a 277 x 132.6 cm 2 radiation field at floor level. The work presented in this thesis describes the measurements performed to bring the unit into clinical use for total body irradiation. A custom flattening filter was placed below the secondary collimator to flatten the beam to within +/-3% of the central axis dose as measured at 10 cm in water. Percent depth dose, tissue-phantom-ratios, surface dose and absolute output were measured in the radiation field. The effects of inhomogeneities were studied and the thickness of lead used for lung attenuators was determined. Verification of treatment planning and delivery was performed with an Alderson-Rando anthropomorphic phantom and showed dose uniformity within +/-10% of the prescribed dose when a lead attenuator was used over the lung.

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Bulawa, Lillith. "The Effects of Total Body Proton Irradiation on Mouse Myometrium". Digital Commons @ East Tennessee State University, 2020. https://dc.etsu.edu/honors/548.

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The boundaries of human space exploration continue to expand with new technology and discoveries making it even more important to investigate the effects of space on biological systems. Although humans have explored space in small increments, reproductive studies must be conducted to determine if stable short- or long-term residences for humans can exist in space. This study explored the effects of whole-body proton radiation on uterine smooth muscle known as the myometrium. Two types of mice utilized in this study were C57BL/6 and B6.129S6Cybbtm1Din/J NOX2 knockout mice. C57BL/6 mice are standard laboratory mice that were used to represent the wildtype treatment group (N=18). The B6.129S6Cybbtm1Din/J NOX2 knockout mice have the NADPH Oxidase 2 gene shut off and represented the NOX2 Knockout treatment group (N=18). A third treatment group was made up of half of the C57BL/6 mice and were fed apocynin (N=18). Apocynin has been shown to inhibit NAPDH oxidase production in mice. NADPH Oxidase 2 is involved in the production of deleterious Reactive Oxygen Species (ROS); thus, apocynin should reduce the production of ROS in mice exposed to radiation. Different doses of radiation (0Gy, 0.5Gy, and 2.0Gy) were applied to the myometrium creating three different treatment subgroups within each mouse strain. The mice received 250 MeV protons at an approximate dose rate of 70cGy/ minute. Myometrium tissue was obtained one week following the radiation treatment. The uteri were removed, embedded, sectioned, and stained in hematoxylin and eosin solution. Thickness was determined by taking five measurements each of the outer longitudinal layer length, the inner circular layer length and the total length of both layers of the myometrium for three individual pieces of tissue for each animal. A one-way analysis of variance (ANOVA) was used to determine statistical differences between the groups and subgroups. Wildtype control mice exposed to 2.0Gy (N=5) of radiation had the thickest outer longitudinal layers compared to wildtype mice exposed to 0Gy (N=5) and 0.5Gy (N=6) (p=0.005, p=0). In the apocynin fed and Knockout treatment groups, the subgroups exposed to 0Gy had the thickest layers compared to their respective subgroups exposed to 0.5Gy and 2.0Gy. The apocynin fed mice exposed to 0Gy (N=6) outer longitudinal layer was statistically significantly thicker than the apocynin-fed mice exposed to 0.5Gy (p=0.004; N=6). The inner circular layer of the apocynin-fed mice exposed to 0.5Gy was statistically significantly thicker than the apocynin-fed mice exposed to 2.0Gy (p=0.001; N=6). Amongst the treatment groups, the wildtype control versus the apocynin fed mice exposed to 0Gy showed the apocynin-fed group to have the thicker outer longitudinal layer (p=0.003) and combined layers (p=0.001). Overall, the knockout group showed no statistical difference when compared to the wildtype control group. Further studies are necessary to reduce the possible confounding effect of the estrous cycle in the mice. The different phases of the mice estrus cycle may inadvertently affect the mouse uterine thickness due to the fluctuations in hormones. This study will add to the limited research regarding the female reproductive system in hopes of expanding the knowledge needed to actualize space colonization.

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Flower, Emily Elizabeth, i not supplied. "Comparison of Two Planning Methods for Heterogeneity Correction in Planning Total Body Irradiation". RMIT University. Applied Sciences, 2006. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20070511.163728.

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Total body irradiation (TBI) is often used as part of the conditioning process prior to bone marrow transplants for diseases such as leukemia. By delivering radiation to the entire body, together with chemotherapy, tumour cells are killed and the patient is also immunosupressed. This reduces the risk of disease relapse and increases the chances of a successful implant respectively. TBI requires a large flat field of radiation to cover the entire body with a uniform dose. However, dose uniformity is a major challenge in TBI. (AAPM Report 17) The ICRU report 50 recommends that the dose range within the target volume remain in the range of -5% to +7%. Whilst it is generally accepted that this is not possible for TBI, it is normally clinically acceptable that ±10% of the prescribed dose to the whole body is sufficiently uniform, unless critical structures are being shielded. TBI involves complex dosimetry due to the large source to treatment axis distance (SAD), dose uniformity and flatness over the large field, bolus requirements, extra scatter from the bunker walls and floor and large field overshoot. There is also a lack of specialised treatment planning systems for TBI planning at extended SAD. TBI doses at Westmead Hospital are prescribed to midline. Corrections are made for variations in body contour and tissue density heterogeneity in the lungs using bolus material to increase dose uniformity along midline. Computed tomography (CT) data is imported into a treatment planning system. The CT gives information regarding tissue heterogeneity and patient contour. The treatment planning system uses this information to determine the dose distribution. Using the dose ratio between plans with and without heterogeneity correction the effective chest width can be calculated. The effective chest width is then used for calculating the treatment monitor units and bolus requirements. In this project the tissue heterogeneity corrections from two different treatment planning systems are compared for calculating the effective chest width. The treatment planning systems used were PinnacleTM, a 3D system that uses a convolution method to correct for tissue heterogeneity and calculate dose. The other system, RadplanTM, is a 2D algorithm that corrects for tissue heterogeneity using a modified Batho method and calculates dose using the Bentley - Milan Algorithm. Other possible differences between the treatment planning systems are also discussed. An anthropomorphic phantom was modified during this project. The chest slices were replaced with PerspexTM slices that had different sized cork and PerspexTM inserts to simulate different lung sizes. This allowed the effects of different lung size on the heterogeneity correction to be analysed. The phantom was CT scanned and the information used for the treatment plans. For each treatment planning system and each phantom plans were made with and without heterogeneity corrections. For each phantom the ratio between the plans from each system was used to calculate the effective chest width. The effective chest width was then used to calculate the number of monitor units to be delivered. The calculated dose per monitor unit at the extended TBI distance for the effective chest width from each planning system is then verified using thermoluminescent dosimeters (TLDs) in the unmodified phantom. The original phantom was used for the verification measurements as it had special slots for TLDs. The isodose distributions produced by each planning system are then verified using measurements from Kodak EDR2 radiographic film in the anthropomorphic phantom at isocentre. Further film measurements are made at the extended TBI treatment SAD. It was found that only the width of the lungs made any significant difference to the heterogeneity correction for each treatment planning system. The height and depth of the lungs will affect the dose at the calculation point from changes to the scattered radiation within the volume. However, since the dose from scattered radiation is only a fraction of that from the primary beam, the change in dose was not found to be significant. This is because the calculation point was positioned in the middle of the lungs, so the height and depth of the lungs didn't affect the dose at the calculation point. The dose per monitor unit calculated using the heterogeneity correction for each treatment planning system varied less than the accuracy of the TLD measurements. The isodose distributions measured by film showed reasonable agreement with those calculated by both treatment planning systems at isocentre and a more uniform distribution at the extended TBI treatment distance. The verification measurements showed that either treatment planning system could be used to calculate the heterogeneity correction and hence effective chest width for TBI treatment planning.

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Wilder, Ben Richard. "A Varying Field Size Translational Bed Technique for Total Body Irradiation". Thesis, University of Canterbury. Physics and Astronomy, 2006. http://hdl.handle.net/10092/1404.

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Total body irradiation is the irradiation of the entire patient as a conditioning for bone marrow transplants. The conditioning process involves destroying the bone marrow allowing for repopulation of the donor bone marrow cells, suppression of the immune system to allow stop graft rejection, and to eliminate the cancer cell population within the patient. Studies have been done demonstrating the importance of TBI conditioning for BMT5. A range of TBI treatment techniques exist, this department uses a bi-lateral technique which requires bolus packed around the patient to simplify the geometry of the treatment. This investigation will focus on one technique which involves using a translating bed. This technique effectively scans a radiation beam over the patient as the bed moves through the beam. Other investigations on translating beds concentrated on varying the scan speed to achieve a dose uniformity to within ±5%. The recommendations quote a dose uniformity of +5% and -10% as acceptable⁹. The dose uniformity in these investigations was along the midline in the longitudinal direction only. This investigation varied field size to achieve dose uniformity to within ±2.5% along the midline of an anthropomorphic phantom. The goal was to determine if a dynamic multi-leaf collimator could be used to give a uniform in the transverse direction as well as the longitudinal direction. An advantage of utilizing the DMLC for this treatment is the ability to shield organs at risk, i.e. lungs and kidneys, without requiring resources to produce shielding blocks14. Gafchromic-EBT film18 was used as a dosimeter but gave unreliable results due to the lack of film scanning equipment with an appropriate sensitivity for reading the dose to the film. Scans were simulated using Xio treatment planning software. The results from the simulations gave a more reliable indication of the absorbed dose to the midline of the phantom. The disadvantage of this varying field size technique was the time and complexity involved in creating a treatment plan. Within the Xio software exists a limit on the number of beams allowed to be applied in a single plan. There is a maximum of 99 beams allowed which is not enough for complete coverage of a patient. A way around this is to increase the field sizes and decrease the scan speed. This option was not investigated. The advantage of this technique was the increased dose uniformity (±2.5%) in comparison to the varying scan speed techniques (±5%). This technique also allows the patient to be unencumbered during the treatment making the process more comfortable for them.

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Książki na temat "Total body radiation"

Broerse, J. J., i T. J. Macvittie. Response of Different Species to Total Body Irradiation. Springer, 2011.

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E, Filipy R., U.S. Nuclear Regulatory Commission. Office of Nuclear Regulatory Resarch. Division of Regulatory Applications. i Pacific Northwest Laboratory, red. Inhaled Pm and/or total-body gamma radiation: Early mortality and morbidity in rats. Washington, DC: Division of Regulatory Applications, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, 1989.

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Inhaled Pm and/or total-body gamma radiation: Early mortality and morbidity in rats. Washington, DC: Division of Regulatory Applications, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, 1989.

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E, Filipy R., Pacific Northwest Laboratory i U.S. Nuclear Regulatory Commission. Office of Nuclear Regulatory Research. Division of Regulatory Applications., red. Inhaled PuO nd/or total-body gamma radiation: Early mortality and morbidity in rats and dogs. Washington, DC: Division of Regulatory Applications, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, 1988.

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E, Filipy R., Pacific Northwest Laboratory i U.S. Nuclear Regulatory Commission. Office of Nuclear Regulatory Research. Division of Regulatory Applications., red. Inhaled ²³⁹PuO₂ nd/or total-body gamma radiation: Early mortality and morbidity in rats and dogs. Washington, DC: Division of Regulatory Applications, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, 1988.

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McCann, Shaun R. Radiation and transplantation. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780198717607.003.0006.

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There is a paradoxical relationship between ionizing radiation and leukaemia. On the one hand, it is known that exposure to high doses of ionizing radiation causes leukaemia; on the other hand, the preparative regimens for stem cell transplantation, which can cure leukaemia, often contain total body irradiation. This chapter discusses the effect war has had on medical technology, with specific regard to the use of stem cells for the treatment of blood disorders such as leukaemia and sickle cell anaemia. The transfer of laboratory techniques to the clinical practice of stem cell transfer and bone marrow transplantation is also discussed.

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Części książek na temat "Total body radiation"

Beyzadeoglu, Murat, Gokhan Ozyigit, Ugur Selek i Ugur Selek. "Lymphomas and Total Body Irradiation". W Radiation Oncology, 429–57. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-27988-1_13.

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Speer, Tod W., Rene Rubin, Iris Rusu, Iris Rusu, Yan Yu, Laura Doyle, Cheng B. Saw i in. "Total Body Irradiation (TBI)". W Encyclopedia of Radiation Oncology, 904–10. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-540-85516-3_38.

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Beyzadeoglu, Murat, Cuneyt Ebruli i Gokhan Ozyigit. "Lymphomas and Total Body Irradiation". W Basic Radiation Oncology, 531–69. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-11666-7_13.

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Storb, Rainer, Frederick R. Appelbaum, Friedrich G. Schuening, Robert Raff, Theodore Graham i H. Joachim Deeg. "Total-Body Irradiation in Bone Marrow Transplantation". W Treatment of Radiation Injuries, 29–33. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4899-0864-3_4.

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Glasgow, Glenn P. "Total Body Irradiation for Bone Marrow Transplantation". W Innovations in Radiation Oncology, 99–106. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-83101-0_8.

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Dandapani, Savita V., i Jeffrey Y. C. Wong. "Modern Total Body Irradiation (TBI): Intensity-Modulated Radiation Treatment (IMRT)". W Total Marrow Irradiation, 177–85. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-38692-4_13.

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Cronkite, Eugene P. "A Historical Perspective on the Therapy of Total-Body Radiation Injury". W Treatment of Radiation Injuries, 183–93. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4899-0864-3_19.

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Evans, Richard G. "Biologic and Physical Principles of Total Body Irradiation for Allogeneic and Autologous Bone Marrow Transplantation in Children with Leukemia and Lymphoma". W Radiation Therapy in Pediatric Oncology, 115–21. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-84520-8_8.

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Textor, S. C., S. J. Forman, R. D. Zipser i J. E. Carlson. "Changes in Renal Blood Flow, Glomerular Filtration, and Vasoactive Hormones in Bone-Marrow-Transplant Recipients After Total-Body Irradiation". W Prostaglandin and Lipid Metabolism in Radiation Injury, 305–17. Boston, MA: Springer US, 1987. http://dx.doi.org/10.1007/978-1-4684-5457-4_32.

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Cahill, R. A., Y. Zhao, M. Foegh i T. Spitzer. "Mediators of Endothelial Cell Injury Following Total Body Irradiation in Bone Marrow Transplant Patients: The Role of Thromboxane and Leukotrienes". W Eicosanoids and Other Bioactive Lipids in Cancer, Inflammation and Radiation Injury, 775–77. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4615-3520-1_150.

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Streszczenia konferencji na temat "Total body radiation"

Strocchi, Sabina, Vittoria Colli, Raffaele Novario, Gianpaolo Carrafiello, Andrea Giorgianni, Aldo Macchi, Carlo Fugazzola i Leopoldo Conte. "Dedicated dental volumetric and total body multislice computed tomography: a comparison of image quality and radiation dose". W Medical Imaging, redaktorzy Jiang Hsieh i Michael J. Flynn. SPIE, 2007. http://dx.doi.org/10.1117/12.708431.

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Rosen, Elliot. "Abstract PO-058: Acute total body ionizing radiation induces long-term cardiac effects and immediate changes in oxidative carbonylation of cardiac troponin T in the rat". W Abstracts: AACR Virtual Special Conference on Radiation Science and Medicine; March 2-3, 2021. American Association for Cancer Research, 2021. http://dx.doi.org/10.1158/1557-3265.radsci21-po-058.

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Rosen, Elliot T., Dmitry Kryndushkin, Baikuntha Aryal, Yanira Gonzalez, Leena Chehab, Jennifer Dickey, Steven Mog i V. Ashutosh Rao. "Abstract 3940: Acute total body ionizing radiation induces long-term adverse effects and immediate changes in cardiac protein oxidative carbonylation in the rat". W Proceedings: AACR Annual Meeting 2019; March 29-April 3, 2019; Atlanta, GA. American Association for Cancer Research, 2019. http://dx.doi.org/10.1158/1538-7445.sabcs18-3940.

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Lienhard, John H. "Non-Gray Radiation Exchange: The Internal Fractional Function Reconsidered". W ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-86386.

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The radiation fractional function is the fraction of black body radiation below a given value of λT. Edwards and others have distinguished between the traditional, or “external”, radiation fractional function and an “internal” radiation fractional function. The latter is used for simplified calculation of net radiation from a non-gray surface when the temperature of an effectively black source is not far from the surface’s temperature, without calculating a separate total absorptivity. This paper examines the analytical approximation involved in the internal fractional function, with results given in terms of the incomplete zeta function. A rigorous upper bound on the difference between the external and internal emissivity is obtained. Calculations using the internal emissivity are compared to exact calculations for several models and materials. A new approach to calculating the internal emissivity is developed, yielding vastly improved accuracy over a wide range of temperature differences. The internal fractional function can be useful for certain simplified calculations.

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Rosen, Elliot T., Dmitry Kryndushkin, Baikuntha Aryal, Yanira Gonzalez, Leena Chehab, Jennifer Dickey i V. Ashutosh Rao. "Abstract 5352: Acute total body ionizing radiation induces long-term cardiac effects and immediate changes in oxidative carbonylation of cardiac proteins in the rat". W Proceedings: AACR Annual Meeting 2020; April 27-28, 2020 and June 22-24, 2020; Philadelphia, PA. American Association for Cancer Research, 2020. http://dx.doi.org/10.1158/1538-7445.am2020-5352.

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Kumano, Tomoyuki, i Katsunori Hanamura. "Energy Conversion From Fossil Fuel Into Spectral-Controlled Radiation for TPV by Super-Adiabatic Combustion in Porous Quartz Glass". W ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ht2007-32509.

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Characteristics of energy conversion from fossil fuel into radiant energy in the energy-recirculated thermophotovoltaic (TPV) generation system with piled porous quartz glass plates have been investigated through numerical simulation. When the total thickness of the quartz glass plates is fixed, it is revealed that the conversion efficiency of the system does not almost depend on a combination of the number of the quartz glass plates and the individual thickness. However, the spectral efficiency with respect to the specific TPV cell may be improved as both the number of the quartz plates is larger and the individual thickness is smaller. As a result, it is suggested that the achievable total efficiency of the TPV system is expected to be over 15% under the condition that the emitter of the system is regarded as gray body and the total thickness of the quartz media is 30mm.

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Rajendran, Suresh, Nuno Fonseca i C. Guedes Soares. "Analysis of Vertical Bending Moment on an Ultra Large Containership Induced by Extreme Head Seas". W ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-24602.

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This paper discusses the numerical analysis of an ultra large containership model in severe head seas. A body nonlinear time domain code based on the strip theory is used for the calculation of the rigid body response of the vessel. The radiation, diffraction, Froude-krylov and hydrostatic forces are calculated for the exact wetted surface area of the ship at each time step. A practical engineering approach is followed to calculate the body nonlinear radiation and diffraction forces. The numerical vertical bending moment is compared with the experimental results. The experiment was conducted on a flexible model in both regular and irregular waves. The model comprised six segments that were joined with an aluminum backbone of variable stiffness characteristics in order to replicate the hydroelastic behavior of the real ship. The model was tested for two ship speeds, 15 and 22 knots. For the first three harmonic values of the vertical bending moment, a good agreement between the numerical and the experimental results are found. However, higher harmonics significantly contributed to the total experimental vertical bending moment, in regular waves with 8m wave height and a ship speed of 15 knots. Similarly, the value of the fourth harmonic was 32% of the first harmonic values when the ship encountered a 5m regular wave with 22 knots speed. On comparison of the rigid body response in irregular seas, the hydroelastic loads resulted in 49% increase in the maximum value of the vertical bending moment.

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Taghipour, Reza, Arswendy Arswendy, Me`lanie Devergez i Torgeir Moan. "Structural Analysis of a Multi-Body Wave Energy Converter in the Frequency Domain by Interfacing WAMIT and ABAQUS". W ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/omae2008-57980.

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In this paper the structural response of a multi-body wave energy converter with power take-off is analyzed in the frequency domain. The device consists of a semisubmersible platform and 21 buoys. The buoys can slide along guides that are attached to the platform. The hydrodynamic and structural problems are solved by using boundary element and finite element software systems WAMIT and ABAQUS. The hydrodynamic analysis is carried out by a linear perturbation approach. A mode expansion method, with total number of 27 modes, is used to describe the dynamic behavior. Moreover, an idealized form of power absorption mechanism is considered herein. A general procedure is established to interface the relevant information between the two software systems. Such information includes the radiation, diffraction and restoring force pressures and inertia loads, etc. In this way, the interaction between the floating bodies is included in the solution in which the dynamic reaction forces are carried as external forces. The structural response is obtained by a quasi-static approach. The objective is to investigate the still water and wave induced internal loads in the column-deck and guide-deck connections in the form of transfer functions. To demonstrate the approach, calculations are made for a following- and oblique-sea wave condition.

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Bakti, Farid P., i Moo-Hyun Kim. "Second Order Difference Frequency Wave-Current Loading Using Kelvin-Newman Approximation". W ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/omae2020-18901.

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Abstract Kelvin & Newman introduced a linearization method to include the current (or forward speed) effect into the diffraction & radiation wave field for large-slender floating bodies. The K-N method assumes a steady far-field current while disregarding the steady potential field due to the presence of the body. The method is proven to be reliable when the Froude number is relatively small, the body shape is relatively slender (∂∂x≪∂∂y,∂∂z), and the sea condition is mild. This requirement is fulfilled for typical FPSOs and ship-shaped vessels in a typical current (or forward speed) condition. Several studies suggested that the presence of the current might change the first order hydrodynamic coefficients such as the first order diffraction force, added mass, and radiation damping. Currents also contributed to a change in the second-order slowly-varying drift force. However, the effect of current in the second-order difference-frequency force is yet to be investigated. By expanding the Kelvin-Newman approximation up to the second order, and solving the problem in the frequency domain, we can save computational time while expanding the accuracy of the scheme. The second order quadratic force is the main focus of this study, since it is the main contributor to the total second order difference frequency forces especially near the diagonal. By implementing the Kelvin-Newman wave current interaction approach up to the wave’s second order, we can assess the performance of the Kelvin-Newman wave current interaction formulation in various sea conditions.

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Raporty organizacyjne na temat "Total body radiation"

Filipy, R. E., K. E. Lauhala, D. R. McGee, W. C. Cannon, R. L. Buschbom, J. R. Decker, E. G. Kuffel i in. Inhaled /sup 147/Pm and/or total-body gamma radiation: Early mortality and morbidity in rats. Office of Scientific and Technical Information (OSTI), maj 1989. http://dx.doi.org/10.2172/6226067.

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Filipy, R. E., J. R. Decker, Y. L. Lai, K. E. Lauhala, R. L. Buschbom, M. P. Hiastala, D. R. McGee i in. Inhaled /sup 239/PuO/sub 2/ and/or total-body gamma radiation: Early mortality and morbidity in rats and dogs. Office of Scientific and Technical Information (OSTI), sierpień 1988. http://dx.doi.org/10.2172/6922905.

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