X-Ray Physics Tutor-Cont

Front 1

RIPPLE EFFECT AND GENERATORS

Back 1

Single phase: 100%
3rd phase: 10%
HF: 1%

Front 2

WHICH OF THE FOLLOWING METHODS IS USED TO DISIPATE HEAT?

Back 2

A LARGE FOCAL SPOT
LARGER DIAMETER ANODE

Front 3

x-ray interactions with matter:

Back 3

compton and phtoelectric are inteactions between x-ray and eelctron cloud

Front 4

classic scattering

Back 4

is when low energy x-ray phtons interact with electron atom
minimal problem

Front 5

redirected photon also called

Back 5

scattered photon

Front 6

compton interaction:

Back 6

: (scatter) comes into patient and is misdirected

Front 7

which of the following x-ray interactions with matter reslts in release of signficant secondary radiation

Back 7

compton interaction

Front 8

what results in complete absorption of x-ray when interacting with matter?

Back 8

photoelectric

Front 9

compton interaction affects the film by causing what in contrast

Back 9

loss of contrast

Front 10

within the diagnostic ragne of x-ray energies which interaction predominates as phton erngy inceases?

Back 10

decreases

Front 11

which interaction predominates as photon energy increases

Back 11

compton interaction

Front 12

LOW ENERGY OR HIGH ENERGY X-RAYS MORE LIKELY TO INTERACT WITH MATTER

Back 12

LOW

Front 13

HALF VALUE LAYER

Back 13

CHARACTERISTIC OF OBJECT BEING X-RAYED: THIS IS THE DEPTH IN WHCIH X-RAY BEAM CAN PENETRATE BEFORE ITS ENERGY IS REDUCED TO ONE HALF OF ITS ORIGINAL VALUE .

LEAD HAS SMALL hlv
MUSCLE HAS LARGE HLV BECAUSE PHOTONS CAN GET TO IT

Front 14

RELATIONSHIP OF ATOMIC NUMBER AND PHOTOELECTRICL INTERACTIONS

Back 14

INCREASED ATOMIC NUMBER RESULTS IN INCREASE PROBIBILITY OF PHTOELECTRIC EFFECT

Front 15

RELATIONSHIP OF KVP AND HALF VALUE LAYER

Back 15

INCREASE KVP RESULTS IN INCREASE HALF VALUE LAYER

Front 16

WHAT IS THE LOSS OF X RAY BEAM INTENSITY FROM ABSORPTION AS WELL AS FROM SCATTERING

Back 16

ATTENUATION

Front 17

less than 40 kvp: = less or more compton

Back 17

less comton

Front 18

(exposure)for x-ray or gamma ray ionization in air only is

Back 18

roentgen

Front 19

ejergy deposited by any type of radiation in any material

Back 19

is Rad

Front 20

biologcial effect cause by any radiation in living organism

Back 20

rotengen equivelent mammal (Rem)

Front 21

milliamperage (mA) is related to time how?

Back 21

inversly proportional"
shorter exposuretime=higer mA

Front 22

three cardinal principles;

Back 22

1. time
2. distnace
3. sheilding
listed in deceasing and pracial order

Front 23

radiation aand mAs how are they related

Back 23

directly related:
twice mAs =twice radiation

Front 24

use of grids increase or decrease dose

Back 24

increase dose of patent because so much of the radiation is removed before it reaches film.

Front 25

what kind of radiatin does roentgen unit apply

Back 25

gamma and x-ray

Front 26

RIPPLE EFFECT AND GENERATORS

Back 26

Single phase: 100%
3rd phase: 10%
HF: 1%

Front 27

WHICH OF THE FOLLOWING METHODS IS USED TO DISIPATE HEAT?

Back 27

A LARGE FOCAL SPOT
LARGER DIAMETER ANODE

Front 28

x-ray interactions with matter:

Back 28

compton and phtoelectric are inteactions between x-ray and eelctron cloud

Front 29

classic scattering

Back 29

is when low energy x-ray phtons interact with electron atom
minimal problem

Front 30

redirected photon also called

Back 30

scattered photon

Front 31

compton interaction:

Back 31

: (scatter) comes into patient and is misdirected

Front 32

which of the following x-ray interactions with matter reslts in release of signficant secondary radiation

Back 32

compton interaction

Front 33

what results in complete absorption of x-ray when interacting with matter?

Back 33

photoelectric

Front 34

compton interaction affects the film by causing what in contrast

Back 34

loss of contrast

Front 35

within the diagnostic ragne of x-ray energies which interaction predominates as phton erngy inceases?

Back 35

decreases

Front 36

which interaction predominates as photon energy increases

Back 36

compton interaction

Front 37

LOW ENERGY OR HIGH ENERGY X-RAYS MORE LIKELY TO INTERACT WITH MATTER

Back 37

LOW

Front 38

HALF VALUE LAYER

Back 38

CHARACTERISTIC OF OBJECT BEING X-RAYED: THIS IS THE DEPTH IN WHCIH X-RAY BEAM CAN PENETRATE BEFORE ITS ENERGY IS REDUCED TO ONE HALF OF ITS ORIGINAL VALUE .

LEAD HAS SMALL hlv
MUSCLE HAS LARGE HLV BECAUSE PHOTONS CAN GET TO IT

Front 39

RELATIONSHIP OF ATOMIC NUMBER AND PHOTOELECTRICL INTERACTIONS

Back 39

INCREASED ATOMIC NUMBER RESULTS IN INCREASE PROBIBILITY OF PHTOELECTRIC EFFECT

Front 40

RELATIONSHIP OF KVP AND HALF VALUE LAYER

Back 40

INCREASE KVP RESULTS IN INCREASE HALF VALUE LAYER

Front 41

most radioluscent

Back 41

air

Front 42

everything else remaining constant if you increase FFD or move the tube away from the film will your image have more or less penumbra?

Back 42

h. You will have less. This is one reason why you shoot chest films at 72”, because you want to have as much detail as possible.

Front 43

you increase the object film distance, ( distance between the patient and the film) you get

Back 43

magnification

Front 44

Focus Cup:

Back 44

on the cathode the filaments are inside a little indentation: this focuses the electrons toward the anode.

The purpose of the focusing cup is to direct electrons not photons to the anode

Front 45

filtration is inherent in the tube because of tube made of

Back 45

glass

Front 46

radiopaque (x-ray cannot get through) water or fat

Back 46

water

Front 47

purpose of grid:

Back 47

decrease amount of scatter