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KMID : 1151820130070030251
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Journal of the Korean Society of Radiology
2013 Volume.7 No. 3 p.251 ~ p.257
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The Study and Measurement of Three Dimensional Spatial Dose Rate from Radioiodine Therapy
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Chang Bo-Seok
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Abstract
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Spatial dose rates of high dose ¹³¹I therapy patients were Measured Three dimensional (X, Y, Z) distributions. I have constructed geometrical an aluminum support structure for spatial dose meters placed in 5 different heights, 8 different azimuthal angles, 6 different time interval and distance 100 cm from High dose ¹³¹I therapy patients. when the height of vertical plane Spatial dose distribution is 100 cm, the Spatial dose rates is max and the error range is low. the vertical plane Spatial dose rates was found to be 71.85 μSv/h on the average at a distance of 100 cm, height 100 cm, from the patients 24 hours after ¹³¹I oral administration. I divided 12 patients into two groups. I have analysed group A (drinking 5 L water) and group B ( drinking 3 L water) in order to measure decrease spatial dose rates. I have found the spatial distributions of patient dose rates is 44.9±7.2 μSv/h in group A and 100.3±8.1 μSv/h in group B by 24 after ¹³¹I oral administration. the reduction factor was found to be approximately 54 % through drinking 5 L water during 24 hours.
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KEYWORD
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I-131, Radioiodine, spatial dose rate, thyroid therapy
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