Article
Optics
Yunxiao He, Wei Hong, Jianfei Hua, Wei Qi, Zhimeng Zhang, Gang Li, Bo Cui, Feng Lu, Zhigang Deng, Shukai He, Jingqin Su, Weimin Zhou, Wei Lu, Yuqiu Gu
Summary: This novel method utilizes the radiochromic effect to measure the fluence distribution of intense short laser pulses, enabling large detection areas and high spatial resolution, suitable for radiochromic films.
Article
Nuclear Science & Technology
Maria A. Piliero, Francesco Pupillo, Stefano Presilla
Summary: In this study, the Konica Minolta CM-700d spectrophotometer was characterized as a portable device for radiation dosimetry using EBT3 GAFchromic films. The results showed high stability and reproducibility of colour measurements, with a dose measurement accuracy of 2% and faster readout speed.
RADIATION MEASUREMENTS
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Hugo Bouchard, Ilias Billas, Anna Subiel, Simon Duane
Summary: This study introduces a new multichannel method for correcting systematic thickness disturbances in radiation dosimetry, showing high precision in relevant applications. Utilizing the eigencolor ratio technique, the method efficiently corrects for thickness variations and dark spots that cause errors in single-channel distributions. The proposed method yields standard uncertainties ranging from 0.8% to 1.9% in relative dosimetry, with the potential to achieve uncertainty levels between 0.3% and 0.6% with repeated measurements.
Review
Chemistry, Multidisciplinary
Pierluigi Casolaro
Summary: Radiochromic films are widely used for two-dimensional dose verification in photon, electron, and proton therapy treatments, covering a wide range of dose levels. Understanding the characteristics, principles, and reading techniques of radiochromic films is crucial for fully utilizing this versatile radiation detection system.
APPLIED SCIENCES-BASEL
(2021)
Article
Multidisciplinary Sciences
Mattias Klaus Juhl, Binesh Puthen Veettil, Giuseppe Scardera, David Neil Roger Payne
Summary: This paper investigates the use of consumer flatbed scanners for monitoring solar cell precursors, finding that contact image sensors are more suitable. The scanners' ability to monitor texture variation in samples was successfully demonstrated.
SCIENTIFIC REPORTS
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Kevin Liu, Patrik Goncalves Jorge, Ramesh Tailor, Raphael Moeckli, Emil Schuler
Summary: This study evaluated the performance of Gafchromic EBT3 film under various measurement conditions to simplify but enhance film dosimetry. The results showed that scanning the film within a certain time window and using a standard calibration curve introduced a maximum error of 2% over a dose range of 1-40 Gy. The film response was influenced by the film-read delay, film batch, scanner type, and beam energy.
Article
Polymer Science
Matheus Antonio da Silveira, Juliana Fernandes Pavoni, Alexandre Colello Bruno, Gustavo Viani Arruda, Oswaldo Baffa
Summary: Craniospinal irradiation is a complex radiation technique used to treat specific types of tumors. Planning this technique in adult patients is challenging, but using IMRT and three-dimensional dosimetry can improve dose distribution verification.
Article
Radiology, Nuclear Medicine & Medical Imaging
S. Dhivya, C. Anuradha
Summary: This study aims to review in-vivo dosimetry measured for TBI patients using film. The results showed that the in-vivo dosimetry results for most patients were within +/- 10% of the prescription dose. Both surface and mid-plane dosimetry were within the acceptable limits. This indicates that TBI treatments at our center meet the acceptable limits and EBT3 films are reliable in TBI in-vivo dosimetry.
INTERNATIONAL JOURNAL OF RADIATION RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Joseph R. Newton, Maxwell Recht, Joseph A. Hauger, Gabriel Segarra, Chase Inglett, Pedro A. Romo, John Adamovics
Summary: The article describes the current practice of patient-specific quality assurance using ion chambers or diode arrays, as well as the development and testing of a 3D radiochromic dosimeter. Three promising dosimeter formulations were studied to find one that retained dose sensitivity upon multiple re-irradiations, making it an ideal choice for further evaluation as a 3D dosimeter.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Biomedical
Antony L. Palmer, David Nash, Wojciech Polak, Sarah Wilby
Summary: This study evaluated the differences between the new Gafchromic EBT4 film and the current EBT3 film for radiotherapy dosimetry. The results showed that EBT4 had more favorable characteristics for radiation dosimetry compared to EBT3, with improved signal-to-noise ratio. EBT4 provided better agreement with the planned doses and showed equivalent or smaller difference in measured dose compared to EBT3.
PHYSICS IN MEDICINE AND BIOLOGY
(2023)
Article
Engineering, Multidisciplinary
Gerardo Jimenez-Aviles, Miguel Angel Camacho-Lopez, Olivia Amanda Garcia-Garduno, Keila Isaac-Olive
Summary: A readout system for radiochromic film dosimetry was developed using a graphical system design approach, a broadband light-emitting diode, and a webcam. The system works in transmission mode similar to a flatbed scanner and was compared to current clinical protocols. Square samples of 3 cm were irradiated and analyzed for noise, optical density, and uncertainty. The imaging prototype had higher optical density compared to the scanner, with the highest value in the red image channel. The best noise rejection was found in the green channel, and the scanner had the lowest uncertainty.
Review
Polymer Science
Yves De Deene
Summary: Gel dosimetry is a method used to validate the radiation dose distribution in high-precision radiotherapy for cancer patients. It involves using gel dosimeters that undergo oxidation or color change upon exposure to ionizing radiation. There are three classes of gel dosimeters: Fricke gel dosimeters, radiochromic gel dosimeters, and polymer gel dosimeters, which are read out using quantitative magnetic resonance imaging (MRI) or X-ray CT. With the introduction of the MR-Linac, the ability to acquire dose maps during radiation has been demonstrated, but new challenges have emerged.
Article
Radiology, Nuclear Medicine & Medical Imaging
Paul. H. Charles, Scott. B. Crowe, Tanya Kairn
Summary: This study calculated the correction factors required when using radiochromic film for small field dosimetry in lung equivalent material, showing that higher correction factors are needed for smaller field sizes and lower densities.
Article
Materials Science, Multidisciplinary
Najm M. Al-Hosiny, Sami S. Alharthi, Ali Badawi
Summary: The optical properties of Gafchromic EBT films were investigated under various solar power intensities, showing a strong dependence of parameters such as absorbance, transmittance, and reflectance on solar power intensity. This suggests that EBT films can be considered suitable candidates for many sensing and dosimetry applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Physical
Wandson dos Santos de Almeida, Anderson Vinicius Silva Alves, Willyan Farias Oliveira, Matheus Augusto Liborio da Silveira, Susana Oliveira de Souza, Francesco D'Errico, Eliana Midori Sussuchi
Summary: The organic ligand ECR in Fricke gels had significant influence on detector sensitivity to ionizing radiation. FGECR showed sensitivity for low doses, making it ideal for optical tomography to measure radiation dose, and it also had a high saturation dose potential.
RADIATION PHYSICS AND CHEMISTRY
(2022)
Article
Oncology
Chengyu Shi, Yong Chen, Deborah (Xiangdong) Fang, Christopher Iannuzzi
Meeting Abstract
Radiology, Nuclear Medicine & Medical Imaging
E. Ku, A. Desai, D. Fang, C. Lawrence, C. Iannuzzi, C. Shi
Meeting Abstract
Radiology, Nuclear Medicine & Medical Imaging
A. Desai, Eric Ku, D. Fang, C. Lawrence, C. Iannuzzi, C. Shi
Article
Oncology
Shalin Shah, Erik Holzwanger, Radhika Khwaja, Deborah Fang, Jazmin Figueroa-Bodine, Christopher Iannuzzi, Chengyu Shi
TECHNOLOGY IN CANCER RESEARCH & TREATMENT
(2016)
Article
Computer Science, Interdisciplinary Applications
Sotirios Stathakis, Panayiotis Mavroidis, Chengyu Shi, Jun Xu, Kevin I. Kauweloa, Ganesh Narayanasamy, Niko Papanikolaou
COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE
(2014)
Article
Radiology, Nuclear Medicine & Medical Imaging
Luis Alberto Vazquez-Quino, Brian Massingill, Chengyu Shi, Alonso Gutierrez, Carlos Esquivel, Tony Eng, Nikos Papanikolaou, Sotirios Stathakis
JOURNAL OF APPLIED CLINICAL MEDICAL PHYSICS
(2012)
Article
Radiology, Nuclear Medicine & Medical Imaging
Michael G. Stabin, X. George Xu, Mary A. Emmons, W. Paul Segars, Chengyu Shi, Michael J. Fernald
JOURNAL OF NUCLEAR MEDICINE
(2012)
Article
Oncology
Chengyu Shi, Adam Tazi, Deborah Xiangdong Fang, Christopher Iannuzzi
Article
Radiology, Nuclear Medicine & Medical Imaging
Bingqi Guo, X. George Xu, Chengyu Shi
Article
Radiology, Nuclear Medicine & Medical Imaging
Xudong Wang, Carlos Esquivel, Elena Nes, Chengyu Shi, Nikos Papanikolaou, Michael Charlton
Meeting Abstract
Radiology, Nuclear Medicine & Medical Imaging
B. Guo, C. Cheng, C. Shi, N. Papanikolaou
Article
Radiology, Nuclear Medicine & Medical Imaging
D. Giantsoudi, D. Baltas, A. Karabis, R. Mavroidis, N. Zamboglou, N. Tselis, C. Shi, N. Papanikolaou
Meeting Abstract
Radiology, Nuclear Medicine & Medical Imaging
C. Shi, D. Fang, C. Iannuzzi
Article
Oncology
Luis A. Vazquez Quino, Xiaoming Chen, Mathew Fitzpatrick, Chengyu Shi, Sotirios Stathakis, Alonso Gutierrez, Carlos Esquivel, Panayiotis Mavroidis, Hassan Alkhatib, Niko Papanikolaou
TECHNOLOGY IN CANCER RESEARCH & TREATMENT
(2014)
Article
Engineering, Biomedical
Yaxi Liu, Fan-Chi Su, Martin Szegedi, Lan Lin, Chengyu Shi, Niko Papanikolaou
INTERNATIONAL JOURNAL OF BIOMEDICAL ENGINEERING AND TECHNOLOGY
(2012)
Article
Chemistry, Inorganic & Nuclear
R. Galea, K. Moore
Summary: In this study, the solution of 225Ac was standardized using the TDCR method. The counting efficiencies were calculated to be approximately 500% for the NRC TDCR system. The relative uncertainty for the activity concentration was determined to be 0.25%. The measured half-life of 225Ac was found to be consistent with previous measurements.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
N. C. Ramirez, S. M. Collins
Summary: In this paper, the authors determined the half-life of 68Ga using ionisation chambers measurements and HPGe gamma-ray spectrometry. They reviewed the current literature and identified possible causes of inconsistency within the dataset. The findings suggest that addressing these issues could lead to a significant improvement in future evaluations of the half-life.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
C. P. Mano, C. Chapelle, Der Mesrobian Kabakian, H. Paradis, O. Delaune, L. Patryl
Summary: CEA/DAM is developing new beta-gamma measurement systems to enhance the reliability of the Comprehensive Nuclear Test Ban Treaty's verification regime. A new spectral unmixing algorithm for full-spectrum analysis was tested to improve analysis methods for nuclear activities with low statistics.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
Junyoung Lee, Geunsub Kim, Hyegang Chang, Sangmin Lee, Sung-Joon Ye
Summary: The study applied the convolution/superposition method to calculate the dose distribution of boron neutron capture therapy and compared it with the Monte Carlo method. The results showed that the C/S method has a fast calculation speed and reasonable accuracy.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
Victor H. Elvira, Marie-Christine Lepy, Yves Menesguen, Stephanie Melhem
Summary: In this study, a cryogenic electrical-substitution radiometer was utilized for the primary calibration of monochromatic photon beams at a synchrotron facility, in order to determine the intrinsic efficiency and dead layer thickness of an HPGe detector. This calibration method allowed for the calculation of efficiency up to 55 keV, where the active thickness of the detector is not a determining factor. Geometrical efficiency was also determined through measurements of a radioactive source at various distances.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
Ali Pashazadeh, Hamid Reza Baghani, Mostafa Robatjazi, Prajit Kadavil
Summary: This study investigated the effect of patch source geometric parameters on the depth dose distribution in skin tissue through Monte Carlo simulation. The results showed that increasing the source-to-skin distance, patch thickness, and patch diameter will reduce the depth dose distribution, with the source-to-skin distance having the most significant impact on dose gradient.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
Yueli Song, Fengqun Zhou, Yajuan Hao, Xiaopeng Zhang, Pengfei Ji, Yong Li
Summary: In this study, the cross section values of the 109Ag(n,2n)108mAg reaction at different neutron energies were measured using the activation technique and off-line gamma-ray spectrometry. The results were compared with experimental data, evaluated data from libraries, and theoretical values to validate their accuracy.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
Zhongkai Fan, Tao Hu, Xiangming Cai, Ruomei Xie, Haoxuan Li, Fengdi Qin, Shoukang Qiu, Yanliang Tan, Jian Shan
Summary: The high-precision measurement of Rn-220 is crucial for assessing and preventing thoron radiological hazards. By adding a ZnS(Ag)-coated clapboard, the issue of reduced Rn-220 concentrations due to decreased air pressure can be addressed, leading to improved detection efficiency. Experimental and simulation results provide valuable references for establishing the Rn-220 calibration factor.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
R. Han, Z. Chen, Y. Nie, B. Liu, G. Tian, X. Zhang, F. Shi, H. Sun, Z. Zhang, Y. Ding, X. Ruan, J. Ren, S. Zhang
Summary: The leakage neutron spectra of Lead samples were measured using a TOF technique, and MCNP simulations with different nuclear data libraries showed that JENDL-5.0 and JEFF-3.3 libraries have better agreement with experimental data. Differences in spectra mainly stem from variations in neutron reaction channels across the libraries, with ENDF/B-VIII.0 and CENDL-3.2 libraries being overestimated in certain energy ranges.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
Nissren Tamam, Maryam Al Huwayz, Z. A. Alrowaili, Norah Alwadai, Khadijah Mohammedsaleh Katubi, Mohammed S. Alqahtani, I. O. Olarinoye, M. S. Al-Buriahi
Summary: This study investigates the radiation shielding properties and radiation protection applications of borotellurite glasses. The results show that the addition of TeO2 can enhance the glass's ability to absorb photons and fast neutrons, and effectively suppress photon buildup. These glasses also exhibit exceptional gamma radiation and fast neutron moderating abilities, making them suitable for designing lead-free, transparent, and efficient radiation protection structures.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
S. Chasapoglou, M. Kokkoris, R. Vlastou, M. Diakaki, V. Michalopoulou, A. Kalamara, G. Gkatis, A. Stamatopoulos, M. Axiotis, S. Harissopulos, A. Lagoyannis, M. I. Savva, T. Vasilopoulou, C. Lederer-Woods, N. Patronis, K. Kaperoni
Summary: This study investigated the accuracy and limitations of theoretical corrections in neutron-induced reactions on isotopically enriched Ge targets. Experimental cross-section measurements were conducted on several reactions using Ge-nat and isotopically enriched Ge targets. The results showed that the methodology using isotopically enriched targets provided accurate results without the need for theoretical corrections.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
P. G. Konstantinidis, G. S. Polymeris, E. Tsoutsoumanos, G. Kitis
Summary: This study investigates an altered version of an existing protocol to study the mechanisms and phenomena of stimulated luminescence. The protocol allows for the examination of recombination mechanisms and trapping parameters of the traps, as well as the observation of potential transitions between two different states.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
Quanzhi Yu
Summary: This study obtained the broad neutron spectrum of the Atmospheric Neutron Irradiation Spectrometer (ANIS) through Monte Carlo simulation and provided an analytic expression. By calculating the Single Error Rate (SER) and ratio, the reliability of the ANIS neutron spectrum was evaluated.
APPLIED RADIATION AND ISOTOPES
(2024)
Article
Chemistry, Inorganic & Nuclear
D. Glavic Cindro, M. Korun, T. Petrovic, B. Vodenik, B. Zorko
Summary: In gamma-ray spectrometric measurements, the decision threshold is determined by the observed value of the measurand. However, this dependence restricts its application to measurements with non-expressive indications. To address this issue, a recalculation of the decision thresholds based on the peak widths corresponding to expressive indications is proposed.
APPLIED RADIATION AND ISOTOPES
(2024)
