pHYSICS FINAL EXAM REVIEW

The radiographer should stand at least _________  feet away from the patient and x-ray tube when making an exposure using mobile radiographic equipment

• 2

• 6

• 5

• 4

Unless otherwise required, during C-arm fluoroscopic procedures the x-ray tube should be located.

• to the side of the patient

• beneath the patient

• to the side of the patient

This part of the image intensifier is made of zinc cadmium sulfide.

• Input phosphor

• Output phosphor

• photocathode

Tags

NGSS.HS-PS4-3

The term that means using an image intensifier to create a brighter image by taking a few x-ray photons and converting that energy into many light photons is the

• brightness gain

• minification gain

• flux gain

Tags

NGSS.HS-PS4-3

The overall quality of the radiographic image is determined by

1. unsharpness
2. visibility of anatomic structures
3. accuracy of structural lines

• 1 and 2

• 1, 2 and 3

• 2 and 3

Tags

NGSS.HS-PS4-5

The radiographic misrepresentation of either the size (magnification) or the shape of the anatomic part is called

• distortion

• density

• contrast

• sharpness

Scatter radiation______________the visibility of anatomic structures. 

• makes no difference

• increase

• decrease

Tags

NGSS.HS-PS4-3

A decrease in brightness or density on the image, results in increased:

• quantum noise

• brightness

• spatial resolution

• contrast resolution

The range of exposure intensities an image receptor can detect is

• density

• dynamic range

• contrast

• speed

Tags

NGSS.HS-PS4-5

Differential absorption occurs because different tissues have varying amounts of

• coherent scattering

• Compton scattering

• photoelectric interactions

Tags

NGSS.HS-PS4-5