X線パルス透視の被曝線量に関する実験的検討 : 低パルスレート透視と高パルスレート透視の比較

概要

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Compared with continuous fluoroscopy, pulsed fluoroscopy can greatly decrease the radiation dose that the physician and patient receive in interventional radiology (IVR) procedures. This study evaluated whether pulsed fluoroscopy (low pulse rate) reduces radiation exposure. On this experiment, a digital angiography unit (Advantx UNV Plus : General Electrics corp.) was used with a 0.1-mm additional copper filter in fluoroscopy. The radiation exposure (measurements of scattered radiation : operator exposure), and entrance surface doses (patient exposure) with pulsed fluoroscopy were compared with low pulse rate (25 pulses/sec : SMART-25) and high pulse rate (50 pulses/sec : IDF-50) X-ray exposure. The amounts of scattered radiation in fluoroscopy were obtained using ionization chamber survey meter (ICS-311 : Aloka). The entrance surface doses were obtained using a skin dose monitor (SDM : McMahon Medical). The radiation exposure (operator and patient exposure) in pulsed fluoroscopy were identical for low pulse rate (SMART-25) and high pulse rate (IDF-50) X-ray exposure. To reduce the risk of radiation injury on patients and operators, physicians should be aware of the radiation exposure of the X-ray system that they use for IVR.被曝線量パルス透視パルスレートパルス幅IVR
東北大学の論文
2004-07-31