Image Quality Factors

Question 1

what are the image quality factors

Answer 1

density
contrast
detail
distortion

Question 2

the degree of blackening of a radiograph

Answer 2

density

Question 3

one of the 2 properties that make visibility of detail

Answer 3

density

Question 4

density is also known as

Answer 4

optical density

Question 5

density-more visible when the crystal’s in the film emulsion are converted to_ in the developer solution

Answer 5

black metallic silver

Question 6

when deciding between a film that is too dark or too light, choose

Answer 6

the dark film

Question 7

What is the controlling factor of density

Answer 7

mAs

Question 8

any combination of mA and time that will produce the same mAs will produce the same density

Answer 8

reciprocity law

Question 9

the min. change necessary to have any effect on density is the shift your mAs by

Answer 9

30% rule

30%

Question 10

relationship between mAs and density

Answer 10

directly proportional relationship

Question 11

as mAs increased, density

Answer 11

increases

Question 12

mAs is decreased, density

Answer 12

decreases

Question 13

as kV increases, there is a _between the anode and cathode

Answer 13

greater potential difference

Question 14

when the potential difference is higher, the electrons strike the anode in _ 3’s and with _ energy and produce _ x-rays

Answer 14

greater
greater
more

Question 15

directly effects density, but not in a proportional relationship

Answer 15

kV

Question 16

as kV increases, density

Answer 16

increases

Question 17

as kV decreases, density

Answer 17

decreases

Question 18

an increase of 15% kV will double density and a decrease in kV of 15% will half the density

Answer 18

15% rule

Question 19

intensity of the beam is greater at the cathode because of the anode heel effect

Answer 19

anode heel effect (anode can be ^ to 45% weaker)

Question 20

if you increase your distance, you must increase your exposure factors to maintain the same density (exposure)

Answer 20

density (exposure) maintenance formula
mAs1=D1 2
—————
mAs2=D2 2

Question 21

the intensity (density, exposure) of the beam is inversely proportional to the square of the distance

Answer 21

inverse square law

Question 22

if distance is doubled, intensity decreases _ times

Answer 22

4

Question 23

if distance is halved, intensity increases _ times

Answer 23

4

Question 24

this variation is from the divergence of the beam as it travels through space

Answer 24

I2=D1 2

Question 25

as filtration increases, density decreases
(a low energy photon most likely would not make it to the IR, but if it did it would add density. _ is removing those low energy photons before they can reach the IR)

Answer 25

filtration

filtration

Question 26

collimation reduces the total number of photons. This reduces scatter, reduces scatter, reducing densities on the film

Answer 26

beam restriction

Question 27

inverse relationship between part thickness and density (as prt. thickness increases, density decreases

Answer 27

anatomical part

Question 28

grids absorb scatter, which would add exposure and density to the IR (the higher the grid ratio, the less the density)

Answer 28

Grids

Question 29

the faster the film/screen speed, the more density the IR will receive (as speed increases, density increases)

Answer 29

IR

Question 30

for filtration what affects the quantity

Answer 30

HBL/ 1/2 value layer

Question 31

for filtration what affects qualty

Answer 31

beam hardening

Question 32

as developer temp increases, density

Answer 32

increases

Question 33

as immersion time increases, density

Answer 33

increases

Question 34

as replenishment rate increases, density

Answer 34

increases

Question 35

as mAs increases, density

Answer 35

increases

Question 36

as kV decreases, density

Answer 36

decrease

Question 37

as distance increases, density

Answer 37

decreases

Question 38

as filtration decreases, density

Answer 38

increases

Question 39

as beam restriction decreases, density

Answer 39

increases

Question 40

as grid ratio increases, density

Answer 40

decreases

Question 41

as film/screen speed decreases, density

Answer 41

decreases

Question 42

as processing increases, density

Answer 42

increases