Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards
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

Digital Imaging 3

Module 3

QuestionAnswer
In a CRT monitor an __________ ________ or ___________ creates images by beaming ___________ towards an _____________. Electron Gun; Cathode; Electrons; Anode
In a CRT Monitor, __________ that are beamed toward the _____________ But are deflected toward the monitor's ______________ __________ to construct the image. Electrons; Anode; Fluorescent screen.
With CRT monitors there are 2 types of image acquisition: _____________ and _____________ Interlaced; Progressive
____________ CRT monitors fill up each line from top to bottom and ___________ CRT monitors fill every other line from top to bottom and then return to the top to fill in the missing lines. Progressive; Interlaced
_________ Monitor provides more luminance, especially in the ___________ of the image and better ___________ reproduction. CRT; Center; Color
LCD monitors produce less _________ _______ and better ___________. They are also easier to _________ and position. Screen glare; Resolution; Move
_________ monitors are more durable. CRT
An LCD monitor's resolution is determined by __________ __________ which is the distance between __________ of the __________ ________. Pixel Pitch; Cells of the Same Color
The vertical and horizontal resolution in an LCD monitor is determined by the __________ ____________ in that given ___________. Pixel Pitch in that given direction.
Aspect ratio refers to the proportional relationship of the __________ and ___________ of the ___________ __________ Width; Height; Display Screen
Most CRT monitors Aspect ratio is _________ and most LCD monitors are ________ viewed in ___________ format. 4:3 ; 16:9; Landscape
The size of the Matrix also affects ________ resolution. The _________ the matrix, the ____________ the pixel value in the matrix and the _________ the spatial resolution. Spatial; Larger; Smaller; Better
The sharpness of the image is also determined by _________ ________ also known as _________ ___________. Pixel Pitch; Dot Pitch
In a CRT monitor, the "pitch" is the distance between the __________ _________. In an LCD monitor the "pitch" is the distance between what? Phosphor Dots; LCD=Pixel pitch is the distance between cells of the same color
To accurately display the gray scale in a radiograph, the display monitor needs to be able to demonstrate at least ________ shades of gray which is equal to _________. 256; 8 bits
In addition to the minimum gray scale display, the ACR requires what kind of spatial resolution for acquisition monitors? American College of Radiology requires 2.5 lp/mm when viewing a 14 x 17 image (35.6 x 43.2 cm)
The contrast resolution of a monitor is what? The difference between the maximum and minimum luminance of the display
__________ __________ determines the colors that can be displayed and depends on the __________ __________ and color capabilities of the monitor. Color Depth; Graphics Adapter
Color Bit Depth refers to what? The number of bits used to create the color of a single pixel
Monitor brightness when referring to a video display is ___________ ___________. Maximal Luminance
ACR standards specify that gray-scale monitors used for interpreting radiographs provide a minimum of what luminance? 171 Candelas per square meter (171 cd/m²)
The MINIMUM level of luminance is called the __________ _________ and which type of monitor has a measurable lower level. Black Level; CRT's have a measurable lower Black Level than LCD's
The number of times an image is drawn on the screen per second is called the _________ _________. Refresh Rate
Refresh Rates range from _____ to _____ images per second. _________ _________ monitors flicker more visibly. 60 to 120; Large CRT
What is Persistence? The delayed light emission after a CRT screen refreshes
Persistence helps when viewing __________ ____________ but produces __________ ________ when viewing a ________-________ display. Static Image; Screen Lag; Cine-type
Because workstation monitors are used in brightly lighted areas, ___________ __________ is an important consideration when evaluating image quality and the tech must be able to discern __________ and __________, ________ lines. Monitor Luminance; Motion; Sharp, visible recorded lines
Modifying ___________ and image __________ alters the ___________ and _____________ __________ record. Demographic; Data; Examination; Permanent Patient record
All Changes must comply with ___________ __________. Institutional Guidelines
If an order is modified after a work list entry is generated, this change must be described in the __________ _________ with an _____________ note. Patient Chart; Explanatory
The ability to make changes to the demographic and image data depends on the ___________ ____________ of the user. Privilege Level
If an image on the screen is facing left and you need it to face right, you would _________ the image. Flip
Adding additional text to an image is called ____________. Annotating
Joining separate images into a single-image format such as those of anatomical parts longer than 17 inches is called ___________. Stitching
When performing a long leg or scoliosis exam using one exposure and specially designed cassettes, a long leg exam would take ____ plates and a scoliosis exam would take ______. 3; 2
A workstation software function that allows a black mask to be placed over bright areas is a practice known as ____________. Shuttering
Another term for shuttering is __________ _________, __________ ___________ or ___________. Black mask, Black border; collimation
The ability to adjust the mask size or whether is can be applied manually or automatically depend on ____________. Manufacturer or vendor
Changing the window width and level of an image is referred to as ___________. Windowing
Window level controls the ____________ and window width controls the ____________. Brightness; Contrast
Created by: foster1317