Lec 2

Question 1

video link?

Answer 1

ok

Question 2

3 conditions for producing x rays

Answer 2

source of e-, voltage driving force, target material

Question 3

anode is blank and cathode is blank

Answer 3

+, -

Question 4

most common target material in x rays

Answer 4

tungsten

Question 5

energy lost by electron changing direction due to nucleus

Answer 5

bremsstrahlung radiation “x ray”

Question 6

energy lost by electron changing direction from hitting another electron

Answer 6

characteristic radiation “x ray”

Question 7

an electron hitting the nucleus creates blank energy transfer

Answer 7

maximum

Question 8

quantity of radiation and exposure time are blank related

Answer 8

directly/linearly

Question 9

area under the curve of photon energy vs relative number of photons

Answer 9

quantity of radiation

Question 10

a deadman switch on the timer of the xray machine is what activates xray blank

Answer 10

impulses

Question 11

aiming cylinder of the x ray machine is called

Answer 11

collimating tube (position indicating device) (beam indicating device)

Question 12

high image density show up as blank on the film and the structures are called blank

Answer 12

dark, radiolucent

Question 13

low image density show up as blank on the film and the structures are called blank

Answer 13

light, radiopaque

Question 14

tooth enamel is blank

Answer 14

radiopaque

Question 15

differentiation between light and dark

Answer 15

contrast

Question 16

clarity of structures outlines

Answer 16

sharpness

Question 17

few shades of gray

Answer 17

high contrast (short scale)

Question 18

many shades of gray

Answer 18

low contrast (long scale)

Question 19

lower energy in kVp causes blank contrast

Answer 19

high

Question 20

higher energy in kVp causes blank contrast

Answer 20

low

Question 21

technical term for unsharpness

Answer 21

penumbra

Question 22

a better machine will have a blank

Answer 22

small focal spot

Question 23

penumbra is going to show up more if the object is blank the source

Answer 23

closer to

Question 24

way to accurately calibrate the penetrating ability of radiation from an x ray machine… aluminum is used

Answer 24

half value layer

Question 25

half value layer is the thicknes of aluminum required to reduce beam intensity by blank

Answer 25

50%

Question 26

intensity of radiation varies inversely as the blank

Answer 26

inverse square law (1/d^2)