Chapter 4: RAD EXPO.

Question 0

With_imaging, automatic_provides images that have similar brightness (density) over an exposure range_than_?

Answer 0

digital, rescaling, greater, 50X

Question 1

What is likely to occur if there is substantial extraneous exposure?

Answer 1

histogram analysis error

Question 2

When the photon intensity reaching the receptor is lower than that required to produce an optimal image.

Answer 2

underexposure

Question 3

Causes the system to rescale the image as if the plate is actually underexposed?

Answer 3

low-intensity exposure

Question 4

of causes grid cutoff & decreased contrast

Answer 4

flattening of luminance

Question 5

Processing algorithm has more of an effect on image_ than_?

Answer 5

contrast, kVp

Question 6

Be caused of_sensitivity to scatter radiation, the kVp should not exceed_ for any nongrid radiography, including_?

Answer 6

Increased, 80, chest

Question 7

Acquiring one image on the_plate available avoids_error

Answer 7

smallest, recognition

Question 8

Collimation limits_?

Answer 8

irradiated volume and reduces undercutting

Question 9

occurs when a large number of pixels will be at the_digital value() so that there is no_difference in the very high_areas, resulting in loss of anatomical structures in that region.

Answer 9

Saturation,maximum ,(black),signal, exposure

Question 10

Receptor’s contribution to recorded detail?

Answer 10

Spatial resolution

Question 11

PSP plates are more_to fogging than conventional film-screen systems?

Answer 11

susceptible

Question 12

What would substantial(_) overexposure of a body part enervate in proportion to the overexposure?

Answer 12

> 2x, additional scatter

Question 13

Expressed as pixels/mm, or pixel density?

Answer 13

sampling

Question 14

In order to visualize the anatomical structures of interest, some initial_ must occur during imaging data extraction.

Answer 14

preprocessing

Question 15

Overexposure is when the_ intensity reaching the receptor is_ than the required to produce an_image

Answer 15

photon, higher, optimal

Question 16

If exposure is>100% above the optimal signal level, the ALARA principle is_, and the extra scatter generated will degrade the_?

Answer 16

violated, contrast

Question 17

When the exposure field is not recognized, the off-focus radiation and scatter outside the exposure field become part of the_?

Answer 17

histogram

Question 18

Currently, each major vendor uses a unique_ indicator whose values indicates the exposure delivered to the plate.

Answer 18

exposure

Question 19

With CR,cutoff does not result in a light image, due to the automatic of the image.

Answer 19

grid

Question 20

Since the image contrast is generally determined through the processing_, the_ does not have the impact on final image contrast as with screen/film systems.

Answer 20

algorithm, kVp

Question 21

The_alignment is_centered to the plate with four collimation margins parallel to the cassette edges.

Answer 21

optimal, feild

Question 22

Because of their wide dynamic range, PSP plates are much more susceptible to_ than are film-screen systems.

Answer 22

fogging

Question 23

The factors that determine that determine recorded detail:

Answer 23

motion
geometric
spatial resolution of receptor unit (line pair/mm)