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Radiation Protection Dosimetry Advance Access originally published online on March 4, 2008
Radiation Protection Dosimetry 2008 130(3):343-350; doi:10.1093/rpd/ncn060
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© The Author 2008. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

A simple method to irradiate blood cells in vitro with radon gas

V. Zareena Hamza, P. R. Vivek Kumar, R. K. Jeevanram, R. Santanam, B. Danalaksmi and Mary N. Mohankumar*

Radiological Safety Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, India

* Corresponding author: marynmk{at}igcar.gov.in

Received September 1, 2007, amended December 31, 2007, accepted January 23, 2008

The design and dosimetry of a novel in vitro radon irradiation facility to investigate cytogenetic damage induced by radon and progeny is described. The system offers a 4{pi} geometry for uniform irradiation, proving a versatile and convenient facility for irradiation of whole blood cells in suspension or media. Doses can be controlled as exact volumes of the gas can be dispensed and measured by the Lucas cell. Irradiation of blood samples could be carried out in a unique and safe manner and the present study is an attempt to demonstrate the usefulness of a facility to expose blood lymphocytes in vitro to radon and its decay products for chromosome aberration analysis. The preliminary results obtained using this facility are presented. Results show an increase in dicentric frequency with increasing concentration of radon (r = 0.97, P < 0.0001). Multiple aberrations in a single cell, characteristic of high linear energy transfer radiation, confirm the effect of alpha exposure.


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