Article Per Year (5 Year)
p-Index From 2020 - 2025
0
P-Index
This Author published in this journals
All Journal Journal of Medical Physics and Biophysics
Reduan Abdullah
Universiti Sains Malaysia
Medicine & Pharmacology Physics

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
The effects of wound dressings on the dose at surface and depth of maximum dose (dmax) for photon and electron beam radiotherapy Raizulnasuha Binti Ab Rashid; Norhayati Dollah; Reduan Abdullah; Wan Nordiana W. Abd Rahman
Journal of Medical Physics and Biophysics Vol 4, No 1 (2017)
Publisher : Indonesian Association of Physicists in Medicine (AIPM/AFISMI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (533.222 KB)

Abstract

The presence of wound dressing at the patients’ skin surface during radiotherapy treatment may potentially alter the dose at surface and shift the dose distribution at depth. In this study, the effects of different types of wound dressing to the radiotherapy treatment were investigated. The dose measurement at surface and dmax were done using different energy of photon and electron beams at 100 cm source to surface distance (SSD). Markus parallel plate ionization chamber and solid water phantom were used to quantify the dose with the dressing types used are Alderm +Plus, Actisorb Plus 25, Gauze and Duoderm CGF Extra Thin. The results show increment of surface dose up to 93.9% by wet gauze for photon beams and around 21% of dose increase for electron beams. Effects of dressing to the the dose at dmax indicate shift of dose distribution towards surface with reduction of dose around 10 % in wet condition for photon beam and up to 35 % for electron beams. Significant changes in surface dose and dose at dmax due to the wound dressing indicate the presence of wound dressing during radiotherapy need to taken in account in calculating dose to the target.
Peripheral Dose Measurement for 6 MV Photon Beam Nur Iziana Mohsin; Ahmad Zakaria; Reduan Abdullah; Mun Fei Wong
Journal of Medical Physics and Biophysics Vol 1, No 1 (2014): Inaugural Issue
Publisher : Indonesian Association of Physicists in Medicine (AIPM/AFISMI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (620.565 KB)

Abstract

The objective of this study is to measure the peripheral dose (PD) at different depths and field sizes using film dosimetry. PD of 6 MV Siemens Primus linear accelerator photon beam for 10 cm square field and 2.5 cm diameter cone were measured at 1.5 cm and 10 cm depth, 100 cm source surface distance (SSD) with Kodak EDR2 film. PD for 10 cm square field and 2.5 cm cone were measured for the distance 1 cm to 5 cm from the geometric field edge. PD was calculated as a percentage of the central axis dose. The PD for both field sizes decreased with increasing distance from the beam edge. PD was also larger for 10 cm square field compared to 2.5 cm circular field for both depths. At 10 cm depth, the measured PD was 20% and 10% higher compared to that of 1.5 cm depth for 10 cm and 2.5 cm field size respectively. The PD for a given beam energy is a function of distance from the beam edge, field size and depth. At any depth measured, PD increases as the field size increases due to radiation scattered from the beam and scatter arising from within the medium. At deeper depth, more Compton electrons are produced and scattered to the peripheral region hence causes the PD to increase with depth. At any field size measured, peripheral dose increases as the depth increases. PD also increases as the field size increases.
Co-Authors Ahmad Zakaria Mun Fei Wong Norhayati Dollah Nur Iziana Mohsin Raizulnasuha Binti Ab Rashid Wan Nordiana W. Abd Rahman