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Showing 6 out of a total of 6 results for community: School of Nuclear and Allied Sciences.
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Numerical modeling of radionuclide migration through a borehole disposal site
Yeboah, S.
;
Akiti, T.T.
;
Fletcher, J.J.
(
SpringerPlus
,
2014-03
)
Radiation dose assessment for occupationally exposed workers in Malawi
Chinangwa, G.
;
Amoako, J.K.
;
Fletcher, J.J.
(
Malawi Medical Journal
,
2017-09
)
Radiological Safety Analysis for a Hypothetical Accident of a Generic VVER-1000 Nuclear Power Plant
Gyamfi, K.
;
Birikorang, S.A.
;
Ampomah-Amoako, E.
;
Fletcher, J.J.
(
Hindawi Science and Technology of Nuclear Installations
,
2020-01-21
)
Radiological risk assessment of a proposed site for a generic VVER-1000 using HotSpot and InterRas codes
Gyamfi, K.
;
Birikorang, S.A.
;
Ampomah-Amoako, E.
;
Fletcher, J.J.
(
Progress in Nuclear Energy
,
2020-01-07
)
Investigation of the status of occupational radiation protection in Malawian hospitals
Chinangwa, G.
;
Amoako, J.K.
;
Fletcher, J.J.
(
Malawi Medical Journal
,
2018-03
)
Patient dose assessment and optimisation of pelvic radiography with computed radiography systems.
Abbeyquaye, D.
;
Inkoom, S.
;
Hammond, N.B.
;
Fletcher, J.J.
;
Botwe, B.O.
(
Oxford University Press
,
2021
)
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Author
Fletcher, J.J. (6)
Amoako, J.K. (2)
Ampomah-Amoako, E. (2)
Birikorang, S.A. (2)
Chinangwa, G. (2)
Gyamfi, K. (2)
Abbeyquaye, D. (1)
Akiti, T.T. (1)
Botwe, B.O. (1)
Hammond, N.B. (1)
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Subject
Accident (1)
Borehole repository (1)
Comsol multiphysics (1)
Digital radiography systems can reduce radiation dose, this capability was harnessed to explore dose and image quality (IQ) optimisation strategies. Entrance surface dose (ESD), effective dose (ED) and organ doses were determined by the indirect method for patients undergoing pelvic anteroposterior X-ray examinations with computed radiography systems. The IQ of patients’ radiographs was assessed in terms of signal-to-noise ratio (SNR). An anthropomorphic phantom was exposed with varying tube potential (kVp), tube current-time product (mAs), and focus-to-detector distance (FDD) to determine phantom entrance dose for the optimisation studies. SNR of each phantom radiograph was determined. Patients’ mean ESD of 2.38 ± 0.60 mGy, ED of 0.25 ± 0.07 mSv and SNR of 8.5 ± 2.2 were obtained. After optimisation, entrance dose was reduced by 29.2% with 5 cm increment in FDD, and 5 kVp reduction in tube potential. kVp and/or mAs reduction with an increment in FDD reduced entrance dose without adversely compromising radiographic-IQ (1)
Heterogeneity (1)
IAEA (1)
Migration (1)
Nuclear power plant (1)
Numerical model (1)
public occupation (1)
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Date Issued
2020 (2)
2014 (1)
2017 (1)
2018 (1)
2021 (1)
Has File(s)
Yes (6)