Image Production

Question 1

mAs effect on contrast

Answer 1

none

Question 2

kVp effect on contrast

Answer 2

inverse

Question 3

SID effect on contrast

Answer 3

none

Question 4

OID effect on contrast

Answer 4

direct

Question 5

OID effect on receptor exposure

Answer 5

none

Question 6

tube filtration effect on contrast

Answer 6

inverse

Question 7

patient size effect on contrast

Answer 7

inverse

Question 8

DEL fill factor effect on receptor exposure

Answer 8

direct

Question 9

DEL fill factor effect on spatial resolution

Answer 9

direct

Question 10

FOV effect on spatial resolution

Answer 10

inverse

Question 11

MTF effect on spatial resolution

Answer 11

direct

Question 12

DQE effect on spacial resolution

Answer 12

none

Question 13

DQE effect on receptor exposure

Answer 13

direct

Question 14

what controls image contrast?

Answer 14

LUT or histogram

Question 15

what controls shape distortion

Answer 15

angle of tube, part, receptor

Question 16

size of the displayed image is known as

Answer 16

field of view (FOV)

Question 17

spacial frequency response of an imaging system or component

Answer 17

modular transfer function

Question 18

describes how efficiently a system translates incident x-ray photons into useful signal relative to noise in an image

Answer 18

DQE detective quantum efficiency

Question 19

underexposure is known in digital as

Answer 19

mottled

Question 20

overexposure is known in digital as

Answer 20

saturated

Question 21

minimum time for mAs

Answer 21

.01 seconds or 10 ms

Question 22

maximum time for mAs

Answer 22

5 seconds

Question 23

15% kVp rule is effective within what range of kVp

Answer 23

60-90 kVp

Question 24

formula for grid ratio

Answer 24

height / distance

Question 25

grid conversion formula

Answer 25

old mas over new mas = old conversion factor over new conversion factor

Question 26

you need at least ___ lines per cm grid frequency to prevent Moire effect

Answer 26

60 lines per cm

Question 27

moire effect is also known as

Answer 27

aliasing

Question 28

primary purpose of filtration

Answer 28

decrease ESE (entrance skin exposure)

Question 29

as filtration goes up, what happens to average beam energy

Answer 29

average energy goes up

Question 30

right sided congestive heart failure can be apparent by

Answer 30

edema in extremities

Question 31

left sided congestive heart failure can be apparent by

Answer 31

pulmonary edema

Question 32

osteitis deformans is also known as

Answer 32

Paget’s disease

Question 33

cancer of epithelial cells

Answer 33

carcinoma

Question 34

is osteomalacia destructive or additive

Answer 34

destructive

Question 35

is osteopetrosis destructive of additive

Answer 35

additive

Question 36

white bright spots the size of cotton balls on skull or pelvis is likely

Answer 36

Paget’s disease

Question 37

is bowel obstruction destructive of additive

Answer 37

destructive

Question 38

which is always smaller, effective or actual focal spot

Answer 38

effective is always smaller due to target angle

Question 39

malacia is the term used for

Answer 39

softness

Question 40

cathode or anode is placed proximal for all extremities

Answer 40

cathode

Question 41

primary controlling factor of subject contrast

Answer 41

kVp

Question 42

isotropically meaning

Answer 42

equally in all directions (x-rays are emitted isotropically)

Question 43

area of image sharpness

Answer 43

umbra

Question 44

area of unsharpness surrounding the image

Answer 44

blur or penumbra