Article
Radiology, Nuclear Medicine & Medical Imaging
Martin P. Martinov, Elizabeth M. Fletcher, Rowan M. Thomson
Summary: This study investigates the dose-enhancement effect of gold nanoparticles in radiotherapy using Monte Carlo simulations. The results show that the arrangement of gold nanoparticles, gold concentration, and photon energy significantly affect the dose enhancement factors at the nucleus and cytoplasm levels.
Article
Radiology, Nuclear Medicine & Medical Imaging
Martin P. P. Martinov, Elizabeth M. M. Fletcher, Rowan M. M. Thomson
Summary: This study used multiscale Monte Carlo simulations to evaluate variations in cytoplasm and nucleus dose enhancement factors over tumor volumes. The results showed that cell/nucleus size, gold particle distribution, gold concentration, and cell position in the tumor all had significant effects on the dose. This highlights the importance of choosing the proper computational model and accounting for intrinsic variations in cell/nucleus size and gold concentration when simulating gold nanoparticle dose-enhanced radiation therapy.
Article
Multidisciplinary Sciences
Lukas R. H. Gerken, Alexander Gogos, Fabian H. L. Starsich, Helena David, Maren E. Gerdes, Hans Schiefer, Serena Psoroulas, David Meer, Ludwig Plasswilm, Damien C. Weber, Inge K. Herrmann
Summary: Nanoparticles can serve as radioenhancers in radiation therapy. This research investigates the dose enhancement capabilities of various nanoparticles based on their metal core composition and beam characteristics, providing design criteria for their optimal performance in specific radiotreatments.
NATURE COMMUNICATIONS
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Seongmoon Jung, Jung-In Kim, Jong Min Park, Hong-Gyun Wu, Chang Heon Choi
Summary: The study demonstrated a sensitivity enhancement of gold-coated CLODs for low-dose measurements in CT imaging. The dose enhancement factor decreased as the thickness of the active layer increased. Gold-coated CLODs showed potential for evaluating very low doses delivered to patients during CT imaging.
PHYSICA MEDICA-EUROPEAN JOURNAL OF MEDICAL PHYSICS
(2021)
Article
Chemistry, Inorganic & Nuclear
Tara Gray, Nema Bassiri, Shaquan David, Devanshi Yogeshkumar Patel, Sotirios Stathakis, Neil Kirby, Kathryn M. Mayer
Summary: Enhancement of dose due to gold nanoparticles in external beam radiation therapy has been quantified for energies of 6 and 18 MV through experimental and Monte Carlo simulations. The highest enhancement was observed for the 18 MV beam at the highest tested GNP concentration, with a DEF of 1.02. Increasing gold concentration and energy in the megavoltage range were found to increase DEF, with a good agreement between measured and simulated results shown across all data sets.
APPLIED RADIATION AND ISOTOPES
(2021)
Article
Oncology
Elena Vlastou, Evaggelos Pantelis, Efstathios P. Efstathopoulos, Pantelis Karaiskos, Vasileios Kouloulias, Kalliopi Platoni
Summary: This study investigates the dose enhancement effect of gold nanoparticles (AuNPs) under different irradiation conditions. The results suggest that a significant dose increase can be achieved, especially at close distances to AuNPs.
Article
Chemistry, Multidisciplinary
Ngoc Han Huynh, James C. L. Chow
Summary: This study investigated the effectiveness of cancer cell killing by gold nanoparticles in proton radiation, showing that the dose enhancement ratio increases with smaller nanoparticle size, shorter distance to DNA, and lower proton beam energy. The maximum dose enhancement ratio (1.83) was achieved with a 25 nm-radius gold nanoparticle, irradiated by a 0.5 MeV proton beam and located 30 nm away from the DNA.
APPLIED SCIENCES-BASEL
(2021)
Article
Biology
Mostafa Robatjazi, Hamid Reza Baghani, Atefeh Rostami, Ali Pashazadeh
Summary: This study evaluated and compared the dose enhancement factor (DEF) and biological effectiveness of common nanoparticles for radiosensitization using Monte Carlo simulation codes. The results showed that different nanoparticles had varying degrees of DEF at different photon energies, with silver (Ag), gadolinium (Gd), and bismuth (Bi) nanoparticles exhibiting the highest enhancements. Iron (Fe) nanoparticles had the lowest biological effectiveness values among the studied nanoparticles. Gold (Au), silver (Ag), and platinum (Pt) nanoparticles showed great potential as radiosensitizers compared to others.
INTERNATIONAL JOURNAL OF RADIATION BIOLOGY
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Zahra Alyani Nezhad, Ghazale Geraily, Fatemeh Hataminia, Wrya Parwaie, Hossein Ghanbari, Somayeh Gholami
Summary: The novel use of Bi(2)O(3) nanoparticles in conjunction with IORT has the potential to enhance radiation therapy outcomes, reduce treatment time, and improve dose distribution accuracy using GENIPIN gel dosimeter.
Article
Oncology
Xiaohan Xu, Jianan Wu, Zhitao Dai, Rui Hu, Yaoqin Xie, Luhua Wang
Summary: This study investigates the sensitization properties of magnetic gold nanoparticles (Fe3O4@AuNPs) in radiotherapy. The results show that under a magnetic field, Fe3O4@AuNPs can enhance the synergistic efficiency in radiotherapy and photothermal therapy, making them potential effective sensitization materials.
FRONTIERS IN ONCOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Maria A. Kolyvanova, Alexandr V. Belousov, Grigorii A. Krusanov, Alexandra K. Isagulieva, Kirill V. Morozov, Maria E. Kartseva, Magomet H. Salpagarov, Pavel V. Krivoshapkin, Olga V. Dement'eva, Victor M. Rudoy, Vladimir N. Morozov
Summary: This study investigated the ability of different high atomic number metal and metal oxide nanoparticles to enhance absorbed dose, with gold showing the highest dose enhancement factor and HfO2 and Ta2O5 being the most versatile in terms of coordinate regions. The findings underscore the importance of carefully planning radiation exposure when high-Z nanoparticles are present.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Chemistry, Physical
S. Mutsakanyi, D. van Eeden, F. C. P. du Plessis
Summary: This study used Monte Carlo simulations to investigate the effect of different moderators on slowing down 6 MeV electrons before striking a tungsten target, and studied the dose-effect when using the generated x-ray beam to treat a tumor enriched with gold nanoparticles. The results showed that water and carbon moderators can effectively slow down electrons and enhance the dose in the tumor.
RADIATION PHYSICS AND CHEMISTRY
(2022)
Article
Chemistry, Physical
F. Moradi, Kh. Rezaee Ebrahim Saraee, D. A. Bradley
Summary: Assessment of radiation dose to the skin is crucial in radiotherapy and diagnostic imaging, with dosimeter placement and thickness affecting measured dose. Monte Carlo simulations can accurately calculate dose at intended depth, providing correction factors for TLD responses in various clinical situations.
RADIATION PHYSICS AND CHEMISTRY
(2021)
Article
Chemistry, Physical
Hamid Reza Baghani, Shiva Nasrollahi
Summary: The study evaluated and compared the efficacy of different clinically recommended nanoparticle types in dose enhancement during low-kV IORT using a Monte Carlo simulation approach. Results showed that Bismuth nanoparticles had the most desirable efficacy in dose enhancement within the target region.
RADIATION PHYSICS AND CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Fouad Abolaban, Eslam Taha, Abdulsalam Alhawsawi, Fathi Djouider, Essam Banoqitah, Andrew Nisbet
Summary: High atomic number nanoparticles, including gold, gadolinium, and silver, were studied for their dose enhancement effects in radiotherapy using Monte Carlo simulation. The study found that different metal nanoparticles exhibited varying dose enhancement factors under different photon beam energies.
APPLIED SCIENCES-BASEL
(2021)