心臓カテーテル検査における術者被曝防護 : 追加シールド (鉛防護具) の有効性

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Since cardiac intervention procedures deliver very high operator radiation doses, radiation protection for the staff in cardiac catheterization laboratories is very important. This study evaluated whether additional shielding (table side drapes (0.3-mm lead equivalent) and lead acrylic shields suspended from the ceiling (0.8-mm lead equivalent)) are useful for protecting the operator from radiation during cardiac intervention procedures. A cine angiography unit (KXO-80c : Toshiba) was used. Cine acquisition was performed at 30 frames/second for the procedures. Pulsed fluoroscopy (30 pulses/second) and 17-cm mode image intensifiers with a grid (10 : 1, 44 lines/cm) were also used. Fluoroscopy scatter radiation was measured using a human phantom, with an ionization chamber survey meter (ICS-311 : Aloka) with and without additional shielding. The radiation exposure (effective dose equivalent : EDE, & dose equivalent : DE) of four operators during cardiac catheterization was determined using an optically stimulated luminescence dosimeter (Luxel badge : Nagase Landauer) with and without additional shielding. With the additional shielding, the fluoroscopy scatter radiation measured with the human phantom was reduced by up to 98% compared with that without. The mean EDE (whole body) dose to the operator was 2.55±1.65 and 4.65±1.21 mSv/year with and without the additional shielding, respectively. Similarly, the mean DE (lens of the eye) to the operator was 15.0±9.3 and 25.73±5.28 mSv/year, respectively. In conclusion, side table drapes and lead acrylic shields suspended from the ceiling provide extra protection to the operator during cardiac intervention procedures.IVR放射線防護具散乱線実効線量等価線量
東北大学の論文
2004-01-31

心臓カテーテル検査における術者被曝防護 : 追加シールド (鉛防護具) の有効性

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