kats pre final 2

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

The fraction of time that the x-ray tube is energized is called the _____ cycle.

When the CCD is directly coupled to the image intensifier, the entire CCD signal is sampled and drives the ABS or ________ system.

The principal advantage of CCDs in most applications, such as a digital camera, is their small ____ and ______.

The spatial resolution of a CCD is determined by its physical size and_______count.

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."

Label: Exam"Flat panel monitors are easier to view and easier to manipulate, and they provide better images."  t or f

Label: Exam" When the two techniques are combined, the process is called_________."

__________ 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. "

Label: Exam"If patient motion occurs between the mask image and a subsequent image, the subtracted image will contain _______artifacts"

 that is, a reduction in brightness at the periphery of the image.  is called

Magnification Mode Results In What 3 things

Distortion Depends On what 3 things

x-rays that exit the patient and interact with the image receptor are. 

The 4 prime exposure factors are 

mA is directly proportional to _____

High contrast = _____ scale

     

Low contrast = _____ scale 

high kVp = ____ scale = _____ contrast

low kVp = ____ scale = ____ contrast

Distortion Depends On 3 things 

                                                        3 main topic of Subject contrast