The time required for the x-ray tube to be switched on and reach selected levels of kilovolt peak (kVp) and mA is called the ______ time. The time required for the x-ray tube to be switched off is the _______ time
interrogation
extinction
The fraction of time that the x-ray tube is energized is called the _____ cycle.
duty
When the CCD is directly coupled to the image intensifier, the entire CCD signal is sampled and drives the ABS or ________ system.
automatic brightness stabilization
The principal advantage of CCDs in most applications, such as a digital camera, is their small ____ and ______.
size
ruggedness
The spatial resolution of a CCD is determined by its physical size and_______count.
pixel
Label: Exam"The CCD has greater sensitivity to light (detective quantum efficiency) and a lower level of electronic noise than a television camera tube. The results are a higher ______ and better ________. These characteristics also result in substantially lower patient radiation doses."
signal-to-noise ratio (SNR)
contrast resolution
Label: Exam"Flat panel monitors are easier to view and easier to manipulate, and they provide better images." t or f
t
Label: Exam" When the two techniques are combined, the process is called_________."
hybrid subtraction
__________ refers to a number of computer-assisted techniques whereby an image obtained at one time is subtracted from an image obtained at a later time. "
"Temporal subtraction
Label: Exam"If patient motion occurs between the mask image and a subsequent image, the subtracted image will contain _______artifacts"
misregistration
that is, a reduction in brightness at the periphery of the image. is called
vignetting,
Magnification Mode Results In What 3 things
• Better spatial resolution
• Better contrast resolution
• Higher patient dose
Distortion Depends On what 3 things
1 Object thickness
2 Object position
3 Object shape
x-rays that exit the patient and interact with the image receptor are.
