现国内外生产使用的DSA机均在床单位右侧平面设置了部分非闭合的铅制挡板

现国内外生产使用的DSA机均在床单位右侧平面设置了部分非闭合的铅制挡板，在临床上为介入医生降低了部分辐射。然而在其他平面均未设置任何辐射防护屏蔽器材，对病人的辐射防护更加薄弱。而在临床上，若病人所患为慢性冠状动脉闭塞病变（CTO），在进行冠状动脉介入手术时，手术时间可长达数十小时，医护患三者在术中接受到的辐射强度与辐射剂量更是巨大。

At present, DSA machines produced and used at home and abroad are equipped with partial non closed lead baffle on the right plane of the bed unit, which reduces some radiation for interventional doctors clinically. However, no radiation protection shielding equipment is set in other planes, so the radiation protection of patients is weaker. Clinically, if the patient is suffering from chronic coronary artery occlusion (CTO), the operation time can be as long as tens of hours during coronary intervention. The radiation intensity and dose received by doctors, nurses and patients during the operation are even greater.

At present, DSA machines produced and used at home and abroad are equipped with partially unclosed lead baffles on the right plane of the bed unit, which can reduce some radiation for interventional doctors in clinic. However, there are no radiation shielding devices in other planes, which makes the radiation protection for patients even weaker. Clinically, if the patient is suffering from chronic coronary artery occlusion (CTO), the operation time can be as long as tens of hours during coronary intervention, and the radiation intensity and dose received by doctors, nurses and patients during the operation are even greater.