Graphite sheets in study of radiation dosimetry and associated investigations of damage

2021 ◽  
pp. 109769
Author(s):  
D.A. Bradley ◽  
Lam Siok Ee ◽  
Siti Nurasiah Mat Nawi ◽  
Siti Fairus Abdul Sani ◽  
Mayeen Khandaker ◽  
...  
2008 ◽  
Vol 1 (3) ◽  
pp. 203-212 ◽  
Author(s):  
Panagiotis Antoniou ◽  
Eleni Kaldoudi

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1868
Author(s):  
Siti Hajar Zuber ◽  
Nurul Ab. Aziz Hashikin ◽  
Mohd Fahmi Mohd Yusof ◽  
Mohd Zahri Abdul Aziz ◽  
Rokiah Hashim

Rhizophora spp. particleboard with the incorporation of lignin and soy flour as binders were fabricated and the influence of different percentages of lignin and soy flour (0%, 6% and 12%) on the physico-mechanical properties of the particleboard were studied. The samples were characterised by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), X-ray fluorescence (XRF) and internal bonding. The results stipulated that the addition of binders in the fabrication of the particleboard did not change the functional groups according to the FTIR spectrum. For XRD, addition of binders did not reveal any major transformation within the composites. SEM and EDX analyses for all percentages of binders added showed no apparent disparity; however, it is important to note that the incorporation of binders allows better bonding between the molecules. In XRF analysis, lower percentage of chlorine in the adhesive-bonded samples may be advantageous in maintaining the natural properties of the particleboard. In internal bonding, increased internal bond strength in samples with binders may indicate better structural integrity and physico-mechanical strength. In conclusion, the incorporation of lignin and soy flour as binders may potentially strengthen and fortify the particleboard, thus, can be a reliable phantom in radiation dosimetry applications.


AIP Advances ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 025209
Author(s):  
Khaled Shamma ◽  
Abdullah Aldwayyan ◽  
Hamad Albrithen ◽  
Abdullah Alodhayb

Author(s):  
R. M. Sahani ◽  
Raghav Singhal ◽  
Naresh Jinger ◽  
Manjeet Kulhar ◽  
Arun Pandya ◽  
...  

Author(s):  
Seth I. Stein ◽  
Mohamed M. Soliman ◽  
Joseph Sparapani ◽  
Raphael Doustaly ◽  
Benjamin W. Cobb ◽  
...  

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Su Bin Kim ◽  
In Ho Song ◽  
Yoo Sung Song ◽  
Byung Chul Lee ◽  
Arun Gupta ◽  
...  

Abstract[68Ga]PSMA-11 is a prostate-specific membrane antigen (PSMA)-targeting radiopharmaceutical for diagnostic PET imaging. Its application can be extended to targeted radionuclide therapy (TRT). In this study, we characterize the biodistribution and pharmacokinetics of [68Ga]PSMA-11 in PSMA-positive and negative (22Rv1 and PC3, respectively) tumor-bearing mice and subsequently estimated its internal radiation dosimetry via voxel-level dosimetry using a dedicated Monte Carlo simulation to evaluate the absorbed dose in the tumor directly. Consequently, this approach overcomes the drawbacks of the conventional organ-level (or phantom-based) method. The kidneys and urinary bladder both showed substantial accumulation of [68Ga]PSMA-11 without exhibiting a washout phase during the study. For the tumor, a peak concentration of 4.5 ± 0.7 %ID/g occurred 90 min after [68Ga]PSMA-11 injection. The voxel- and organ-level methods both determined that the highest absorbed dose occurred in the kidneys (0.209 ± 0.005 Gy/MBq and 0.492 ± 0.059 Gy/MBq, respectively). Using voxel-level dosimetry, the absorbed dose in the tumor was estimated as 0.024 ± 0.003 Gy/MBq. The biodistribution and pharmacokinetics of [68Ga]PSMA-11 in various organs of subcutaneous prostate cancer xenograft model mice were consistent with reported data for prostate cancer patients. Therefore, our data supports the use of voxel-level dosimetry in TRT to deliver personalized dosimetry considering patient-specific heterogeneous tissue compositions and activity distributions.


2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Nanette Freedman ◽  
Mattias Sandström ◽  
Jonathan Kuten ◽  
Natan Shtraus ◽  
Inna Ospovat ◽  
...  
Keyword(s):  

2020 ◽  
Vol 192 (1) ◽  
pp. 27-35
Author(s):  
S U Gaikwad ◽  
R R Patil ◽  
M S Kulkarni ◽  
C M Dudhe ◽  
S V Moharil

Abstract New highly sensitive optically stimulated luminescent phosphors with NaCl moiety and dopants Ca,Cu,P/Mg,Cu,P are developed. These phosphors show very high optically stimulated luminescence (OSL) sensitivity. The dose response for NaCl:Ca,Cu,P is linear up to 1.2 Gy and for NaCl:Mg,Cu,P is slightly sub linear from 0.2 Gy. These phosphors show 30% fading during first 4 and later signal gets stabilised with no further signal loss. These sensitive phosphors will find applications in radiation dosimetry using OSL.


2016 ◽  
Vol 19 (2) ◽  
pp. 289-297 ◽  
Author(s):  
Xiaoyun Zhou ◽  
Philip H. Elsinga ◽  
Shivashankar Khanapur ◽  
Rudi A. J. O. Dierckx ◽  
Erik F. J. de Vries ◽  
...  

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