Quiz ma’am Lovely 2 Flashcards
consists of columns (M) and rows (N) that define small square regions called picture elements or pixels
Matrix
The amount of body part or patient included in the image.
Field of View
the smallest element in a digital image.
Pixel
directly related to the amount of spatial resolution or detail in the image
Pixel Size
●The number of bits within a pixel
•Pixel Bit Depth
Refers to its appearance on the display monitor of the computer and is a function of the monitor’s ability to emit light through the surface of the display.
Brightness
The ability of the digital system to display subtle changes in the shade of gray.
Contrast Resolution
The ability of the imaging system to demonstrate small details of an object
Spatial Resolution
Image noise contributes no useful diagnostic information and serves only to detract from the quality of the image.
● is visible as brightness or density fluctuations on the image.
Quantum noise
Ability to respond to varying levels of exposure, more tissue densities on the digital image are seen, giving the appearance of more detail.
Dynamic Range
The range of exposure diagnostic image values the image detector is able to produce.
Exposure Latitude
The purpose of this class of processing is to generate an image that is more pleasing to the observer
Image Enhancement
to improve the quality of images that have distortions or degradations.
Image Restoration
reduce the size of the image in order to decrease transmission time and reduce storage space.
Image Compression
These processing operations “create images from other images or non-image data.
Image Synthesis
Also known as high-pass filtering and increases contrast and edge enhancement.
Edge Enhancement
Also known as low-pass filtering
Smoothing
The process of adding text to an image
Anotation
controls how bright or dark the screen image is
window level
controls the ratio of black and white, or contrast
window width
●Blacken out the white collimation borders, effectively eliminating veil glare.
Background Removal or Shuttering
Results in a black appearance of bone and a white appearance of soft tissue
Image Inversion
Technique that can remove superimposed structures so that the anatomic area of interest becomes more visible.
Digital Subtraction
When anatomy or the area of interest is too large to fit on one cassette, multiple images can be “stitched” together using specialized software programs.
Image Stitching
One of the most commonly used three-dimensional (3D) rendering techniques
Multiplanar Reconstruction (MPR
Used to visualize vessels (MIP) and air-filled structures (MinIp).
•Maximum Intensity Projection and Minimum Intensity Projection (MIP and MinIp)
Similar to MIP but allows the user to assign colors based on the intensity of the tissue so that bone, contrast agent, and organs can be seen in different colors.
Volume Rendering Technique (VRT
●Using a threshold of pixel intensity values, everything below the threshold will be removed, and everything above will be assigned a color and shown as a 3D object.
Shaded Surface Display (SSD)
