The thickness of lead sheet used for radiation protection is generally within 1-10mm.
How thick the lead plate is needed has nothing to do with the parameters of the machine, but with the value of the radiation high voltage.
Ray high voltage 75kV, the thickness of protective lead plate ≥ 1mm; ray high voltage 100kV, the thickness of protective lead plate ≥ 1.5mm;
Ray high voltage 150kV, the thickness of protective lead plate ≥ 2.5mm; ray high voltage 200kV, the thickness of protective lead plate ≥ 4mm;
Ray high voltage 250kV, the thickness of protective lead plate ≥ 6mm; Ray high-pressure 300kV, protective lead plate thickness ≥ 9mm;
Ray high-pressure 350kV, protective lead plate thickness ≥ 12mm; ray high-pressure 400kV, protective lead plate thickness ≥ 15mm.
Expanded information
General protection of the classification method
1, the X-ray machine Inherent protection: X-ray machine's inherent safety protection performance is the most important part of X-ray protection. The bulb tube sleeve, shades should not leak rays, the window is equipped with aluminum filter plate, useful beam into the patient's skin at the air exposure rate should be less than 6R/min. Especially with the bed of the bulb tube fluoroscopy, the X-ray bulb tube and its attachments, such as leakage of radiation, the staff and the patient will be subjected to direct radiation.
2, time protection: minimize the time of X-ray radiation. In the intervention before the procedure to develop a strict operating procedures, to understand the patient's relevant information to minimize unnecessary exposure. The cumulative exposure time of intraoperative operations should not exceed 30min, to optimize the best conditions for exposure and avoid repeated exposure.
3, distance protection: the use of increasing the distance between the operator and the source of radiation (i.e., the focal point of the bulb tube) and the scatterer (i.e., examined) to reduce the radiation dose to the operator, the distance of each increase by a factor of 1, the radiation dose is reduced by 3/4, fluoroscopic exposure, except for the operator and the main assistants, other personnel should be away from, to avoid the source of X-ray radiation.
4, shielding protection: set up shielding between the source of radiation and the staff to reduce or eliminate radiation, if the shielding has a lead suit, lead apron, lead cap, lead glasses, lead gloves and so on.
Baidu encyclopedia - ray protection lead plate
Baidu encyclopedia - ray protection