Intro to Rad Protection week 3
Help!
|
|
||||
---|---|---|---|---|---|
show | computed tomography (CT).
ultrasound.
magnetic resonance imaging.
(All of the above.)
🗑
|
||||
show | radiation detector
🗑
|
||||
show | atomic number and mass density
🗑
|
||||
show | pixel values
🗑
|
||||
Digital imaging could only be developed after advances were made in | show 🗑
|
||||
Computed radiography developed in the 1970s with the use of ____ as the image receptor. | show 🗑
|
||||
Scanned projection radiography was developed as a complement to____. | show 🗑
|
||||
show | direct capture solid-state devices
🗑
|
||||
Digital radiography first began to be used in clinical settings in the_____. | show 🗑
|
||||
show | matrix size
🗑
|
||||
The number of visible shades of gray in a digital image is determined by___. | show 🗑
|
||||
The dynamic range determines the degree of___ in the image | show 🗑
|
||||
_____ requires the largest matrix size. | show 🗑
|
||||
The typical matrix size for digital radiography is____. | show 🗑
|
||||
Spatial resolution is determined by the ratio of____to____. | show 🗑
|
||||
Scanned projection radiography differs from conventional radiography in the lack of | show 🗑
|
||||
show | number of detectors.
🗑
|
||||
show | long scanning time.
🗑
|
||||
Computed radiography utilizes____ for latent image formation. | show 🗑
|
||||
show | computed
🗑
|
||||
Detectors acquire info by | show 🗑
|
||||
show | image density
🗑
|
||||
show | image contrast
🗑
|
||||
Resolution is controlled by ____ size. | show 🗑
|
||||
Detectors currently used in CR include all of the following except | show 🗑
|
||||
Digital radiography replaces | show 🗑
|
||||
show | Flat panel detectors
🗑
|
||||
Which type of system uses a a two-part process to convert incoming x-ray photons to an electronic digital signal | show 🗑
|
||||
show | photodectector
🗑
|
||||
show | Scintillator
🗑
|
||||
A photostimulable imaging plate includes a ___ layer | show 🗑
|
||||
DR cassettes are also know as | show 🗑
|
||||
The most common phosper use for computed radiography imaging plates is | show 🗑
|
||||
show | phototimulable fluorohalides
🗑
|
||||
show | photoeletric interactions
🗑
|
||||
show | 8 hours
🗑
|
||||
show | image reader device
🗑
|
||||
The CR imaging plate is scanned by a(n) | show 🗑
|
||||
When the CR imaging plate is scanned the phosphors of the latent image release energy in the form of | show 🗑
|
||||
During CR imaging plate processing, the laser frees trapped electrons allowing them to return to a lower energy state. This process is known as. | show 🗑
|
||||
show | dynamic
🗑
|
||||
What is the milliamperage used during fluoro | show 🗑
|
||||
The image intensifier improved fluoro by increasing image____. | show 🗑
|
||||
show | photopic
🗑
|
||||
X-rays that exit the patient and enter the image intensifier first interact with the | show 🗑
|
||||
show | zinc cadmium sulfide
🗑
|
||||
show | x-rays, light
🗑
|
||||
The ___ in the image intensifier emits electrons when it is stimulated by light photons | show 🗑
|
||||
The number of light photons emitted withing the image intensifier is ___ to the amount of x-ray photons exiting the patient. | show 🗑
|
||||
show | output phosphor
🗑
|
||||
The ___ is the product of the minification gain and the flux gain. | show 🗑
|
||||
show | flux
🗑
|
||||
show | brightness gain
🗑
|
||||
show | input phosphor
🗑
|
||||
show | 5,000 - 30,000
🗑
|
||||
Fluoro for an air contrast barium enema is generally done at ___ kV. | show 🗑
|
||||
Viewing the fluoro image in magnification mode increases | show 🗑
|
||||
Automatic brightness control(ABC) maintains the brightness of the image by varying | show 🗑
|
||||
The fluoro x-ray tube and image receptor are mounted on a | show 🗑
|
||||
The carriage commonly support the | show 🗑
|
||||
During fluoro, the SOD cannot be less than ___ inches | show 🗑
|
||||
The photocathode absorbs ___ and emits ____. | show 🗑
|
||||
show | electrons
🗑
|
||||
The primary ___ occurs from the acceleration and focusing of the electron beam. | show 🗑
|
||||
The input screen is ____ in shape. | show 🗑
|
||||
The shape of the input screen helps to control | show 🗑
|
||||
The photocathode is composed of ___ metals | show 🗑
|
||||
Photoemissive materials absorb ____ and emit ___. | show 🗑
|
||||
The greater the voltage supplied to the electrostatic lenses, the ___ the acceleration and the ___ the focal point to the input screen. | show 🗑
|
||||
show | increase the fluoro tube mA.
🗑
|
||||
An electron that is described as being metastable: | show 🗑
|
||||
Doping of a photostimulable phosphor with Europium results in | show 🗑
|
||||
show | Metastable states are produced
🗑
|
||||
Photostimulable phosphor image receptors | show 🗑
|
||||
To remove the image background radiation or a previous image, one should | show 🗑
|
||||
The slow-scan portion of the computed radiography reader | show 🗑
|
||||
Spatial resolution in computed radiography is principally determined by | show 🗑
|
||||
The source of the stimulating light is: | show 🗑
|
||||
How does the computed radiography reader maintain the laser beam as a circle | show 🗑
|
||||
The x-ray capture element of a computed radiography imaging plate is the | show 🗑
|
||||
show | Image contrast
🗑
|
||||
Which of the following is an advantage of CR over film/screen. | show 🗑
|
||||
show | Requires computer processing
🗑
|
||||
show | Is virtually scatter-free
🗑
|
||||
The image receptor in CR is | show 🗑
|
||||
Which of the following is used as a radiation detector in a DR | show 🗑
|
||||
show | 30 frames per second
🗑
|
||||
During digital fluoro | show 🗑
|
||||
show | Two
🗑
|
||||
Interrogation time: | show 🗑
|
||||
show | postprocessing
🗑
|
||||
show | Image just preceding contrast
🗑
|
||||
A misregistration artifact | show 🗑
|
||||
Remasking | show 🗑
|
||||
show | Barium Fluorohalide with Europium
(Cassette w/ IR)
🗑
|
||||
Indirect DR (Digital Radiography) | show 🗑
|
||||
Indirect DR (Digital Radiography) | show 🗑
|
||||
Indirect DR (Digital Radiography) | show 🗑
|
||||
show | Involves no scintillating crystals
🗑
|
||||
Direct DR | show 🗑
|
||||
Minification times flux gain equals | show 🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
Joker71
Popular Radiology sets