Carbon ions have become the most widely used particles in heavy-ion tumor therapy due to favorable physical and biological characteristics. The beam delivery system (BDS) and tumor tissues are directly bombarded with accelerated carbon ions, resulting in activation products in the components and the patient's body. The results of an experimental study and a Monte-Carlo simulation for the radioactivity induced in a treatment room under a uniform scanning mode were presented in this study. They indicated that the multi-leaf collimator (MLC) and the patient's body were the main sources of induced radioactivity. The half-lives of the main produced radionuclides ranged from a few minutes to tens of minutes for single irradiation and from dozens of days to hundreds of days for long-term irradiation. The personal dose of medical staff working in the treatment room and the additional dose of the patient from the induced radioactivity were estimated. Finally, some suggestions were made to reduce the unwanted radiation exposure of the medical staff, patients, and carers.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.apradiso.2022.110350 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Understanding Ion Transport in Alkyl Dicarbonates: An Experimental and Computational Study.
ACS Phys Chem Au
January 2025
Department of Fibre and Polymer Technology, Division of Coating Technology, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden.
In an effort to improve safety and cycling stability of liquid electrolytes, the use of dicarbonates has been explored. In this study, four dicarbonate structures with varying end groups and spacers are investigated. The effect of these structural differences on the physical and ion transport properties is elucidated, showing that the end group has a significant influence on ion transport.
View Article and Find Full Text PDFEnhanced Ion Solvation and Conductivity in Lithium-Ion Electrolytes via Tailored EMC-TMS Solvent Mixtures: A Molecular Dynamics Study.
ACS Omega
January 2025
Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand.
The development of stable, high-performance electrolytes is essential to addressing the safety concerns and limited lifespan caused by the thermal and chemical instability of traditional organic carbonate-based electrolytes in lithium-ion batteries (LIBs). This study examined the potential of mixed solvent systems, specifically ethyl methyl carbonate (EMC) and tetramethylene sulfone (TMS), to modify ion solvation and improve ionic conductivity in LIB electrolytes. Through molecular dynamics simulations, we investigated the solvation structure and transport properties of lithium ions (Li) in these solvent environments.
View Article and Find Full Text PDFHighly Green Fluorescent Carbon Dots from Gallic Acid: A Turn-On Sensor toward Pb Ions.
ACS Omega
January 2025
Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia.
Carbon dots (CDs) are emerging novel fluorescent sensing nanomaterials owing to their tunable optical properties, biocompatibility, and eco-friendliness. Herein, we report a facile one-pot hydrothermal route for the synthesis of highly green fluorescent CDs using gallic acid (GA) as a single carbon source in ,-dimethylformamide (DMF) solvent, which serves as a nitrogen source and reaction medium. The optical properties of the synthesized GA-DMF CDs were systematically characterized by using UV-vis and photoluminescence spectroscopy, revealing strong green fluorescence.
View Article and Find Full Text PDFPolymeric hydrogel integrated paper-based potentiometric ion-sensing device for the determination of sodium ions in human urine.
Analyst
January 2025
Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan.
A paper-based potentiometric sensor integrated with a polymeric hydrogel has been developed for sodium ion (Na) determination in human urine. The construction of an all-solid-state ion selective electrode (s-ISE) and an all-solid-state reference electrode (s-RE) on a photo paper substrate was achieved using an inkjet printing method. For s-ISE fabrication, carbon nanotubes (CNTs) and gold nanoparticles (AuNPs) were printed on the substrate as a nanocomposite solid contact.
View Article and Find Full Text PDFMung bean-derived carbon dots suppress ferroptosis of Schwann cells the Nrf2/HO-1/GPX4 pathway to promote peripheral nerve repair.
Biomater Sci
January 2025
Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou 450052, China.
Schwann cells (SCs) can potentially transform into the repair-related cell phenotype after injury, which can promote nerve repair. Ferroptosis occurs in the SCs of injured tissues, causing damage to the SCs and exacerbating nerve injury. Targeting ferroptosis in SCs is a promising therapeutic strategy for effective repair; however, research on ferroptosis in the peripheral nervous system remains limited.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!