X-ray penetration through the human body will produce certain biological effects. If the X-ray exposure is excessive and exceeds the allowable exposure, the radiation response may occur and a certain level of radiation damage may occur. However, if the X-ray exposure is within the allowable range, the general effect is minimal. People don't have to reject the necessary X-ray and CT examinations because of radiation, let alone dare not enter the radiation section of the hospital.
It can adopt shielding protection and interval protection criteria. Shielding protection refers to the use of substances with high atomic number, commonly lead or lead-containing substances, as a barrier to absorb unnecessary x-rays. Interval protection refers to the application of the principle that the amount of X-ray exposure is inversely proportional to the square of the interval to reduce the amount of exposure by increasing the interval between the X-ray source and the human body.
There are two kinds of X-rays from the X-ray tube to the human body: the primary ray and the secondary ray. The secondary ray is produced in the process of the primary ray mapping penetrating other substances, and its energy is smaller than the primary ray, so its influence is greater. Usually, X-ray tube shell, light shield and aperture, filter board, lead glass behind screen, lead screen, lead rubber apron, lead gloves and walls are used to stop shielding and protection. Increasing the interval between human body and X-ray source to stop interval protection is a simple protection measure.
1. The inherent protection of X-ray machine: The inherent safety protection performance of X-ray machine is the most important link of X-ray protection. The tube sleeve and shader should not leak rays. The window should be equipped with an aluminium filter plate. The air reflection rate of the useful wire harness entering the skin of the patient should be less than 6R/min. Especially when the X-ray tube and its accessories are fluoroscopy in bed, workers and patients will be exposed to direct radiation if radiation leakage occurs.
2. Time protection: shorten the radiation time of X-ray as far as possible. Before the operation, strict procedures should be drawn up to understand the patient's relevant materials and minimize unnecessary exposure. The cumulative exposure time during operation should not exceed 30 minutes. Optimum projection conditions should be optimized to prevent repeated exposure.
3. Interval protection: To increase the interval between the operator and the radiation source (i.e. the focus of the spherical tube) and the scatterer (i.e. being examined) and to reduce the radiation dose to the operator, the radiation dose will be reduced by 3/4 for every doubling of the interval. During fluoroscopy exposure, the operator and the main assistant should stay away from the X-ray radiation source.
4. Shielding protection: shielding between radiation source and staff to reduce or eliminate radiation, if shielding, lead jacket, lead apron, lead cap, lead glasses, lead gloves, etc.
Thank you for reading and watching. The wonderful content of this article comes from: radiation protection equipment, we will have more wonderful content to continue to show you. For more details, please click: http://www.jnlzsb.com. Thank you for your support!