XRAY INTENSIFYING SCREEN Meaning and
Definition
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An X-ray intensifying screen is a specialized device used in radiology that enhances the efficiency of capturing X-ray images. It is often placed in contact with X-ray film or a digital imaging plate to increase the detectable signal and decrease the required exposure time by significantly amplifying the X-ray photons.
The X-ray intensifying screen consists of a thin translucent sheet or layer made of luminescent materials, commonly called phosphors, which have the ability to convert X-ray energy into visible light. These phosphors emit light of a longer wavelength when stimulated by X-ray radiation. The emitted light is then absorbed by X-ray film or digital detectors, facilitating the formation of a latent image that can be later converted into a visible X-ray image.
The intensifying screen is usually composed of two layers: a front layer called the phosphor layer and a rear layer, called the base layer, which provides support and contains reflective materials to redirect the emitted light towards the film or detector. The phosphor layer is generally made from rare-earth elements like gadolinium, terbium, or lanthanum, which possess high atomic numbers that enhance their ability to stop X-rays and convert their energy into light.
X-ray intensifying screens significantly reduce the radiation dosage required to obtain diagnostic images, making them an essential component of X-ray imaging systems. Additionally, they assist in improving the quality and sharpness of the X-ray images, allowing for better visualization of anatomical structures and enhancing diagnostic accuracy.
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