PREPROCESSING
Failure of this program can result in images that are too dark or too bright.
Histogram
This controls how bright or dark the screen image is.
Window level
This refers to the detail or sharpness of the image.
spatial resolution
True or false.
The way the patient's name is entered for each visit is irrelevant.
False
This post-processing function is used for anatomy or areas of interest too large to fit on one cassette (usually for scoliosis studies or long bone studies).
stitching
Pre-programmed histograms/algorithms of the luminance values for every anatomic part
Look-up table (LUT)
This controls the ratio of black and white or contrast
Window width
How does the image appear when there are more pixels involved in the averaging or the signal?
smoother
This function allows retrieval of images from the PACS system.
Archive query
Which type of collimation is necessary to comply with ALARA? pre-exposure or post-exposure
pre-exposure
This removes detector defects and noise correction
Preprocessing
Unexposed borders around the collimation edges allow excess light to enter the eye. This is known as ____ ______.
Veil glare
Suppression of frequencies can result in loss of small details. This is also known as _______.
masking
Patient name, health care facility, patient identification number, date of birth, exam date, and other pertinent information are included in the ______________.
demographic information
The process of selecting and removing a portion of the image.
cropping
The higher the kVP, the _______ the histogram.
This viewing technique eliminates veil glare.
Shuttering
This is also known as high-pass filtering.
Edge enhancement
This function allows the quality control technologist to select one or more local computers to receive images.
Manual send function
This post-processing function should never be used to hide poor collimation practices.
shuttering
Changing the slope of the look-up table graph will increase or decrease __________.
Contrast
______ allows magnification of the entire image.
Zoom
Digitalization gives the image a _____ latitude.
wide
Proper patient demographic input is the responsibility of the _________.
technologist
This states that the sampling frequency must be greater than twice the bandwidth of the input signal.
Nyquist theorem