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Fluoroscopy- Image Intensifier Tube with complete solutions.
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Fluoroscopy- Image Intensifier Tube with complete solutions.
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Fluoroscopy- ImageIntensifier Tube with
complete solutions
During fluoroscopy, maximum image detail is desired; this requires high
levels of ________.
image brightness
The image intensifier was developed principally to replace the _____.
conventional fluorescent screen
The image intensifier raises illumination into the _____ vision region,
where visual acuity is greatest.
cone
The brightness of the fluoroscopic image depends primarily on
the anatomy that is being examined, the kVp, and the mA
What techniques are preferred in fluoroscopy?
high kVp and low mA are preferred.
The precise fluoroscopic technique that will be used is determined by
the
radiologist and the radiologic technologist.
, fluoroscopic mA varies according to
patient thickness and the response of the ABC system.
Until approximately 1960 radiologists viewed fluoroscopic images in a
dark room because
the fluoroscopic screen image was very dim.
image-intensifier tube
is a complex electronic device that receives the image-forming x-ray
beam and converts it into a visible-light image of high intensity.
The tube components are contained within a glass or metal envelope
that provides
structural support but more importantly maintains a vacuum.
Purpose of image intensifier
The image-intensifier tube converts the pattern of the x-ray beam into a
bright visible-light image.
X-rays that exit the patient and are incident on the image-intensifier
tube are transmitted through the glass envelope and interact with the
input phosphor, which is ______.
cesium iodide (CsI)
When an x-ray interacts with the _______, its energy is converted into
visible light; this is similar to the effect of radiographic intensifying
screens.
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