Ch. 32 Flashcards
On the main menu screen, operations accessible only to quality control technologists with a password are known as
Key Operator Functions
On the “study data” or “patient data” screen, the submit study button sends a patient’s file to the ? system for storage.
PACS
Windowing adjustments, the histogram, and the exposure indicator for selected image are available on the ?
Image Review Screen
Typically, side to side movement of the cursor while depressing the mouse button over an image will increase brightness from left to right, contrast is increased by mopping the cursor ? and decreased by moving it ?
Up; Down
Extreme reduction of contrast may ? the image
Reverse
From the image review screen, by touching the ?, an image reprocessing screen can be assessed that allows alternative algorithms to be applied, annotations to be added and other ch ages made to the image.
Histogram
The “assign” or “stamp view” button dedicates the specific image to a ?
Study
CR cassettes to be used can be “assigned” to a study by scanning their ? codes into the system using a laser reader.
Bar
A “suspend” button holds two studies simultaneously for a review before sending other to the ?
PACS
When the entire study is displayed, the “accept all images” or “store” button can be used to send the ? study into PACS storage.
Entire
The “select destination” feature can be used to send an image directly to a printer without being ? in the PACS system.
Saved
A,though right and left armorers are available electronically, ? markers are strongly recommended for legal reasons.
Physical (lead)
The speed of any imaging system expresses its sensitivity to radiation, and is always ? a related to the amount of exposure required to produce an adequate signal at the image receptor.
Inversely
The speed of digital imaging systems is still based on traditional film-based radiography, which defined a standard speed value of ? as requiring an exposure of 2 mR to produce an average density of 2.5.
100
Immediately before the advent of digital imaging systems, the most commonly used film/screen combinations in radiography had reached a speed of ?
400
Early CR systems were typically installed to operate at a speed of ? which is the inherent speed of the photostimulable phosphor plate used as an image receptor for CR.
200
Because the operating speed of any digital imaging system is based upon the computer processing rather than on the cassette or plate, the speed at which it operates can actually be ? without any physical change of the receptor plates used.
Selected
When the processing speed of the CR reader or DR computer is doubled, the image receptor plate needs to only receive ? as much exposure for the whole system to produce the proper image.
Half
Nearly all molders CR and DR systems can be operated at a speed class of 300, 350, or 400, without the appearance of substantial ? in the image.
Mottle
Neither the brightness nor the contrast of digital images can be attributed entirely to the original radiographic ? used by the radiographer.
Technique
