scholarly journals Effect of plasma hydrodynamics on laser-produced bremsstrahlung MeV photon dose

2020 ◽  
Vol 27 (11) ◽  
pp. 113108
Author(s):  
C. Courtois ◽  
A. Compant La Fontaine ◽  
T. Bonnet ◽  
F. Gobet ◽  
F. Hannachi ◽  
...  
Keyword(s):  
Photon Dose ◽  
Plasma Hydrodynamics

Radiation exposure in the environment of patients after application of radiopharmaceuticals

2008 ◽  
Vol 47 (06) ◽  
pp. 267-274 ◽  
Author(s):  
F. Boldt ◽  
C. Kobe ◽  
W. Eschner ◽  
H. Schicha ◽  
F. Sudbrock
Keyword(s):  
Nuclear Medicine ◽  
Radiation Exposure ◽  
Radioactive Source ◽  
Time Intervals ◽  
The Public ◽  
Dose Rates ◽  
Diagnostic Nuclear Medicine ◽  
Photon Dose ◽  
Order Of Magnitude ◽  
Study Dose

Summary Aim: After application of radiopharmaceuticals the patient becomes a radioactive source which leads to radiation exposure in the proximity. The photon dose rates after administration of different radiopharmaceuticals used in diagnostic nuclear medicine were measured at several distances and different time intervals. These data are of importance for estimating the exposure of technologists and members of the public. Patients, method: In this study dose rates were measured for 67 patients after application of the following radiopharmaceuticals: 99mTc-HDP as well as 99mTcpertechnetate, 18F-fluorodeoxyglucose, 111In-Octreotid and Zevalin® and 123I-mIBG in addition to 123I-NaI. The dose rates were measured immediately following application at six different distances to the patient. After two hours the measurements were repeated and – whenever possible – after 24 hours and seven days. Results: Immediately following application the highest dose rates were below 1 mSv / h: with a maximum at 780 μSv/h for 18F (370 MBq), 250 μSv/h for 99mTc (700 MBq), 150 μSv/h for 111In (185 MBq) and 132 μSv/ h for 123I (370 MBq). At a distance of 0.5 m the values decrease significantly by an order of magnitude. Two hours after application the values are diminished to 1/3 (99mTc, 18F), to nearly ½ (123I) but remain in the same order of magnitude for the longer-lived 111In radiopharmaceuticals. Conclusion: For greater distances the doses remain below the limits outlined in the national legislation.

scholarly journals Deep learning prediction of proton and photon dose distributions for paediatric abdominal tumours

2021 ◽  
Vol 156 ◽  
pp. 36-42
Author(s):  
F. Guerreiro ◽  
E. Seravalli ◽  
G.O. Janssens ◽  
J.H. Maduro ◽  
A.C. Knopf ◽  
...  
Keyword(s):  
Deep Learning ◽  
Dose Distributions ◽  
Photon Dose ◽  
Abdominal Tumours

Photon dose at the maze entrance door: The comparison of flattening filter and flattening filter free working modes

2018 ◽  
Vol 49 ◽  
pp. 1-4
Author(s):  
Á.Á. Tóth ◽  
L.D. Dragojlović ◽  
N.V. Ignjatov ◽  
M. Krmar
Keyword(s):  
Flattening Filter Free ◽  
Photon Dose ◽  
Entrance Door ◽  
Flattening Filter

Study on Radiation Dose Calculation of PWR Spent Fuel Storage and Transportation

2021 ◽  
Author(s):  
Wen Yang ◽  
Xing Li ◽  
Jinrong Qiu ◽  
Lun Zhou
Keyword(s):  
Radiation Dose ◽  
Normal Condition ◽  
Radiation Safety ◽  
Spent Fuel ◽  
Dose Rates ◽  
Storage Pool ◽  
Transport Container ◽  
Photon Dose ◽  
Spent Fuel Storage ◽  
Fuel Storage

Abstract With the rapid development of nuclear energy, spent fuel will accumulate in large quantities. Spent fuel is generally cooled and placed in a storage pool, and then transported to a reprocessing plant at an appropriate time. Because spent fuel is content with a high level of radiation, spent fuel storage and transportation safety play important roles in the nuclear safety. Radiation dose safety are checked and validated using source analysis and Monte Carlo method to establish a radiation dose rate calculation model for PWR spent fuel storage pool and transport container. The calculation results show that the neutron and photon dose rates decrease exponentially with increase of water level under normal condition of storage pool. The attenuation multiples of neutron and photon dose rates are 4.64 and 1.59, respectively. According to radiation dose levels in different water height situations, spent fuel pool under loss of coolant accident can be divides into five workplaces. They are supervision zone, regular zone, intermittent zone, restricted zone and radiation zone. Under normal condition of transport container, the dose rates at the surface of the container and at a distance of 1 m from the surface are 0.1759 mSv/h and 0.0732 mSv/h, respectively. The dose rates decrease with the increasing radius of break accident, and dose rate at the surface of the transport container is 0.278 mSv/h when the break radius is 20 cm. Transport container conforms to the radiation safety standards of International Atomic Energy Agency (IAEA). This study can provide some reference for radiation safety analysis of spent fuel storage and transportation.

A comparison between GATE and MCNPX for photon dose calculations in radiation protection using a male voxel phantom

2019 ◽  
Vol 157 ◽  
pp. 47-53 ◽  
Author(s):  
Tiantian Cui ◽  
Zhanpeng Li ◽  
Shuyuan Zhang ◽  
Yidi Wang ◽  
Dandan Chen ◽  
...  
Keyword(s):  
Radiation Protection ◽  
Dose Calculations ◽  
Voxel Phantom ◽  
Photon Dose

Lateral electron transport in FFT photon dose calculations

1997 ◽  
Vol 24 (12) ◽  
pp. 1992-2000 ◽  
Author(s):  
Eugene Wong ◽  
Jake Van Dyk ◽  
Yunping Zhu
Keyword(s):  
Electron Transport ◽  
Dose Calculations ◽  
Photon Dose

Clinical validation of the Acuros XB photon dose calculation algorithm, a grid-based Boltzmann equation solver

2011 ◽  
Vol 51 (3) ◽  
pp. 376-385 ◽  
Author(s):  
Lone Hoffmann ◽  
Mai-Britt K. Jørgensen ◽  
Ludvig P. Muren ◽  
Jørgen B. B. Petersen
Keyword(s):  
Boltzmann Equation ◽  
Dose Calculation ◽  
Clinical Validation ◽  
Calculation Algorithm ◽  
Dose Calculation Algorithm ◽  
Acuros Xb ◽  
Photon Dose ◽  
Grid Based
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