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Radiographic Equipment Unit 1
Terms in this set (28)
Image intensifier tube
Complex electronic device that receives the image-forming x-ray beam and converts it into a visible-light image of high intensity
the arm that supports the fluoroscopic equipment suspended over the table
A layer of the image intensifier made of cesium iodide and bonded to the curved surface of the tube itself. It absorbs the remnant x-ray photon energy and emits light in response.
Absorbs light photons and emits electrons
A series of charged electrodes,
Accelerates and focuses electrons through the anode, and towards the output screen.
Anode in the image intensifier
positively charged with 25 kV to attract electrons across the intensifier
total brightness gain
a measurement of the increase in image intensity achieved by an image intensification tube
a measurement of the increase in light photons due to the conversion efficiency of the output screen
charged coupled device (CCD)
a semiconducting device capable of storing a charge from light photons and striking a photosensitive surface. It has the ability to store freed electrons, thus storing the image in a latent form and its primary advantage is the extremely fast discharge time.
Automatic Brightness Control (ABC)
A function of the fluoroscopic unit that maintains the overall appearance of the fluoroscopic image by automatically adjusting the kVp, mA or both
Electron emission that follows light stimulation
Site where accelerated electrons interact and produce light
the image minification from the input phosphor to the output phosphor
the portion of any image that results from the periphery of the input phosphor is inherently unfocused
heated filament that supplies a constant electron current by thermionic emission
accepts light from the output phosphor and converts it into a parallel beam
Splits image data so that you can film & record the data
a change in quantity or signal in response to another quantity or signal and is widely used in medical imaging
visualization of body parts in motion by projecting x-ray images on a luminous fluorescent screen
Light and electron scattering within the tube degrades the image.
An ion pump used to remove ions produced during operation of the Image Intensifier. It helps maintain a vacuum.
The generator switches on/off very rapidly to prevent the tube from overheating
The time it takes for the x-ray tube to be switched on and reach the selected levels of kVp and mA
The time required for the x-ray tube to be switched off
The fraction of time that the x-ray tube is energized
Charged Coupled Device (CCD)
A device that converts visible light from the output phosphor to an electronic signal
Flat Panel Image Receptor (FPIR)
Made of amorphous selenium, these devices convert x-ray energy directly to an electronic signal.
Analog to Digital Converter (ADC)
Converts analog signal to digital numbers
THIS SET IS OFTEN IN FOLDERS WITH...
Radiographic Equipment Unit 2
Radiology Equipment 2209 Unit 1
RADR 2209 Unit 3
RADR 2209 Unit 4
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