Beam limiter, also known as collimator or beam limiter, is an electromechanical optical device installed in front of the output window of the tube sleeve of the X-ray tube assembly. Its main function is to control the irradiation field of the output line of the X-ray tube, so as to meet the requirements of X-ray imaging and diagnosis
To minimize the projection range, avoid unnecessary dose and can absorb some scattered rays, improve image clarity.
In addition, it can indicate the projection center and the size of the projection field. Therefore, donfgguang is indispensable for X-ray projection and protection
A kind of auxiliary equipment.
Manual east limiter produced by Huading electronics is mostly used in photography. This kind of beam limiter is used to cover the opening and closing activities of lead leaf
Manually adjust the beam limiter. On the knob or pull rod to achieve. The internal structure is also provided with an irradiation field indication in addition to the above mentioned.
System. It uses a light bulb to simulate the focal point of an X-ray tube, replacing x-rays with visible light, reflected by a reflector, to the
The bed surface. The visible light path after reflection is the same as that of the X-ray through the mirror, so it can foretell the size of the irradiation field. Because the life of the indicator light is relatively short, so the lighting of the indicator light is controlled by a button switch, which can be closed by itself within 15s~1min. Some indicators have two stages of complete life to meet the illumination field indication in the case of high indoor brightness. Mirrors are generally made of silver-plated plastic with an aluminium equivalent of about 0.5mm and do not affect X-ray imaging. On the front of the limiter is a clean, transparent plastic plate marked with black lines or dots to indicate the center of the ray field. Some east beam limiter is marked with the irradiation field size of the corresponding focal distance around the knob or within the activity range of the pull rod, mainly used for the illumination field preset before the illumination field indicator light, so that the size of the illumination field can be adjusted quickly after the indicator light, and the service life of the indicator light can be extended.
Author:X Ray Collimator