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Contribution of Nuclear Fragmentation to Dose and RBE in Carbon-Ion Radiotherapy.
Radiat Res
January 2025
Department of Radiation Oncology, Mayo Clinic, Rochester, Minnesota.
Variable relative biological effectiveness (RBE) of carbon radiotherapy may be calculated using several models, including the microdosimetric kinetic model (MKM), stochastic MKM (SMKM), repair-misrepair-fixation (RMF) model, and local effect model I (LEM), which have not been thoroughly compared. In this work, we compared how these four models handle carbon beam fragmentation, providing insight into where model differences arise. Monoenergetic and spread-out Bragg peak carbon beams incident on a water phantom were simulated using Monte Carlo.
View Article and Find Full Text PDFEnhanced Cytotoxic Effects of Cold Plasma Deposition of Topotecan: A Novel Approach for Local Cancer Drug Delivery to Glioblastoma Cells.
Cancers (Basel)
January 2025
School of Chemical and Bioprocess Engineering, University College Dublin, D04 V1W8 Dublin, Ireland.
Background/objectives: Despite the numerous advances in glioblastoma multiforme (GBM) treatment, GBM remains as the most malignant and aggressive form of brain cancer, characterized by a very poor outcome, highlighting the ongoing need for the development of new therapeutic strategies. A novel intervention using plasma-assisted local delivery of oncology drugs was developed to mediate the drug delivery, which might improve drug uptake and/or chemotherapeutic action. Topotecan (TPT), a water-soluble topoisomerase I inhibitor with major cytotoxic effects during the S-phase of the cell cycle, was selected as the candidate drug because despite its potent antitumor activity, the systemic administration to the brain is limited due to low crossing of the blood-brain barrier.
View Article and Find Full Text PDFInverse dose protraction effects of low-LET radiation: Evidence and significance.
Mutat Res Rev Mutat Res
January 2025
Radiation Epidemiology Branch, National Cancer Institute, MD 20892-9778, USA; Faculty of Health, Science and Technology, Oxford Brookes University, Headington Campus, OX3 0BP, UK.
Biological effects of ionizing radiation vary not merely with total dose but also with temporal dose distribution. Sparing dose protraction effects, in which dose protraction reduces effects of radiation have widely been accepted and generally assumed in radiation protection, particularly for stochastic effects (e.g.
View Article and Find Full Text PDFCorresponding-states framework for classical and quantum fluids-Beyond Feynman-Hibbs.
J Chem Phys
January 2025
Institute of Thermodynamics and Thermal Process Engineering, University of Stuttgart, Pfaffenwaldring 9, D-70569 Stuttgart, Germany.
Effective potential methods, obtained by applying a quantum correction to a classical pair potential, are widely used for describing the thermophysical properties of fluids with mild nuclear quantum effects. In case of strong nuclear quantum effects, such as for liquid hydrogen and helium, the accuracy of these quantum corrections deteriorates significantly, but at present no simple alternatives are available. In this work, we solve this issue by developing a new, three-parameter corresponding-states principle that remains applicable in the regions of the phase diagram where quantum effects become significant.
View Article and Find Full Text PDF"MINIMIZING THIGHPLASTY COMPLICATIONS: A COMBINED APPROACH OF J MEDIAL PATTERN AND HELIUM-PLASMA ASSISTED LIPOSCULPTURE".
Plast Reconstr Surg
January 2025
Department of Plastic Surgery, Policlinico di Modena, University of Modena and Reggio Emilia, Modena, Italy.
Thighplasty is a widely performed body contouring procedure, utilizing various surgical techniques for thigh lifting, including medial scar positioning, vertical and horizontal procedures, and liposuction. Despite its popularity, thighplasty is associated with high complication rates and suboptimal postoperative outcomes.This article presents a novel technique: the J medial thighplasty combined with helium plasma radiofrequency technology (HPRF) to address moderate skin and soft-tissue laxity and ptosis in the inner thighs.
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