4-6 February 2019
Centara Grand at Central Ladprao
Asia/Bangkok timezone
Deadline for full paper revision: 21 May 2019.

The Eye Lens Doses Assessment in Nuclear Medicine Using Correction Factor of Hp(3)/Hp(0.07)

5 Feb 2019, 14:40
1h 10m
Centara Grand at Central Ladprao

Centara Grand at Central Ladprao

Chatuchak, Bangkok 10900, Thailand
Poster Medical Poster 2

Speaker

Ms Waraporn Sudchai (Thailand Institute of Nuclear Technology (Public Organization))

Description

Many reports presented the conversion coefficients from air kerma to Hp(3) especially for photons but rare information with dose conversion coefficients for beta radiation. The dose equivalent quantities for assessment of the eye lens dose for photons and beta radiation must be considered separately depended upon with penetrating radiation and low penetration depth. Recently, Behrens (Physikalisch-Technische Bundesanstalt (PTB)) presented the correction factors for the ISO rod phantom, a cylinder phantom, and the ICRU sphere for reference beta radiation fields of the BSS2 which calculated from Sr-90/Y-90. In this study, the eye lens doses assessment in nuclear medicine were evaluated by correction factor of Hp(3)/Hp(0.07) calibrated with Sr-90/Y-90 using a cylinder phantom and ISO rod phantom respectively. Hp(3) for radionuclides used for nuclear medicine such as I-131, Tc-99m and Ga-68, were calculated from correction factor for eye lens dose from small OSL dosimeters inserted in a cylinder phantom at depth 3 mm. The results showed that percentage differences between evaluated eye lens dose from the correction factor compared with Hp(0.07) evaluated from extremities dose were found to be not exceeding ± 15%.

Primary author

Ms Waraporn Sudchai (Thailand Institute of Nuclear Technology (Public Organization))

Co-authors

Ms Leeda Mitrayon (SSDL Office of Atoms for Peace) Mr Natch Rattanarungruangchai (Thailand Institute of Nuclear Technology (Public Organization)) Mr Sahakan Monthonwattana (Thailand Institute of Nuclear Technology (Public Organization)) Mr Vithit Pungkun (SSDL Office of Atoms for Peace)

Presentation Materials

There are no materials yet.