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KMID : 1023420150150030254
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Journal of Dental Hygiene Science
2015 Volume.15 No. 3 p.254 ~ p.258
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Spatial Dose Distribution from Portable Hand-Held Dental X-Ray Equipment
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Han Gyeong-Soon
Ahn Sung-Min
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Abstract
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To compare the stationary dental X-ray generator and the portable dental X-ray generator and to understand spatial radiation dose depended on locations by measuring spatial radiation dose of the portable dental X-ray generator. The researchers used an Ionization chamber to measure spatial radiation dose which was generated while applying X-ray radiation to real bone skull phantom with both portable and stationary dental X-ray generator. There were 4 measurement locations which were immediate anterior, right, left and posterior. Distance of measurement was 50 cm in every location and the recorded result is an average of two applications of X-ray radiation to the maxillary molar area under the condition of 70 kVp, 3 mA, 0.1 sec. Average spatial radiation dose of portable X-ray generator was 37.51 μSv, much higher than that of stationary X-ray generator which was 10.77 μSv (p＜0.001). The result of the spatial radiation dose of the portable X-ray generator showed a huge difference depending on types of units which varied from 17.77 μSv to 68.90 μSv (p＜0.05), also depending on the measurement location, immediate anterior resulted in the highest radiation dose of 54.14 μSv and immediate right was the lowest of 13.60 μSv. Immediate left and posterior, however, resulted in similar radiation dose which were 42.12 μSv, 40.18 μSv (p＜0.01). With this result, we claim that usage of portable dental X-ray generator should be restricted to patients who can?t move and exposure to radiation should be minimized by wearing lead-apron.
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KEYWORD
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Portable hand-held dental X-ray equipment, Radiation, Radiation defense, Spatial dose
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