radiology

Question 1

reduction of the exposure time will increase the motion unsharpness?

Answer 1

False

Question 2

what is the role of a collimator?

Answer 2

setting the size of the x-ray beam

Question 3

KW is an exposure factor, true of false?

Answer 3

False

Question 4

to maintain the same exposure, if increasing the MAs you have to elevate the KVp too?

Answer 4

False

Question 5

What is the normal tube voltage range in small animal radiography?

Answer 5

40-100 KVp

Question 6

the use of a grid improves the image contrast?

Answer 6

True

Question 7

what is not a normal component of an indirect digital system (CR)?

Answer 7

X-ray film

Question 8

the elementary unit of the X-ray beam is the electron?

Answer 8

FALSE

Question 9

Fluroscopy can be digital or analog, true or false?

Answer 9

True

Question 10

Fluroscopy is also called “C-arm”

Answer 10

true

Question 11

electromagnetic radiation with higher frequency has more penetrating power through space and matter?

Answer 11

True

Question 12

What is the direction of travel of electrons in the X-ray tube?

Answer 12

from the cathode to the anode

Question 13

how do we increase the penetrating power of X-rays?

Answer 13

increase the KVp

Question 14

increasing the film-object distance will what?

Answer 14

distort the image

Question 15

1% of the energy produced by the anode is in the form of What?

Answer 15

X-rays

Question 16

the temperature of the filament within the cathode is controlled by what?

Answer 16

time setting

Question 17

The intensity of X-rays increases as SID (source-image-distance) decreases?

Answer 17

True

Question 18

How is the potential difference measured between the anode and the cathode?

Answer 18

kilovolts

Question 19

thinner body parts do what to the radiographic density?

Answer 19

increase it

Question 20

what is the main factor controling the scatter radiation?

Answer 20

the collimator setting

Question 21

what do grids contain?

Answer 21

Lead

Question 22

where is a grid located?

Answer 22

Between the patient and cassette

Question 23

to prevent magnification and distortion of the object being radiographed, the patient must be??

Answer 23

As parallel and close to the film as possible

Question 24

how should the animal be positioned when radiograph is taken over laterally positioned animal?

Answer 24

head should face the viewers left with its spine at the top of the image

Question 25

any body part exceeding this measurement requires the use of a grid?

Answer 25

10cm

Question 26

when using a grid the dose of radiation should be reduced?

Answer 26

true

Question 27

the scattered beam is negligible concerning safety of staff?

Answer 27

False

Question 28

the X-ray penetrates the body without losing energy?

Answer 28

False

Question 29

what is the purpose of a grid?

Answer 29

to improve the image contrast

Question 30

the X-ray consists of charged particles?

Answer 30

False

Question 31

what is not a normal component of the digital radiographic technology: X-ray tube Intensifying screen Grid Collimator

Answer 31

Intensifying screen

Question 32

the attenuation of the x-ray beam does not rely on which parameter?

Answer 32

the optical density

Question 33

what component is different between conventional and digital radiography ?

Answer 33

detector

Question 34

what is the main source of exposure of the personnel?

Answer 34

secondary beam from the patient

Question 35

Fat is more radiopaque than fluids?

Answer 35

False

Question 36

increased distance between the the object and detector can cause an unsharp image?

Answer 36

False

Question 37

Distortion can be prevented by centralisation?

Answer 37

true

Question 38

CR systems are cheaper, DR systems are more expensive?

Answer 38

True

Question 39

what exposure factor can be used in small animal radiography?

Answer 39

5-11mAs

Question 40

scatter radiation is mainly bases on mAs?

Answer 40

False

Question 41

longer exposure time is needed for a chest X-ray?

Answer 41

False

Question 42

what exposure factors cause the same blackening on the detector as 60KV/8mAs?

Answer 42

80Kv/ 2mAs

Question 43

magnification is an image parameter?

Answer 43

False

Question 44

An under exposed image will be too bright?

Answer 44

True

Question 45

an under exposed image will be too bright?

Answer 45

True

Question 46

Digital systems require much higher doses than anolog?

Answer 46

False

Question 47

dose equivaent is a protection against ionising radiation?

Answer 47

False

Question 48

what does the personal dose meter record?

Answer 48

the effective dose

Question 49

Sochastic effects may result from diagnostic radiology?

Answer 49

true

Question 50

what is an especially sensitive tissue for the ionising radiation?

Answer 50

Bone marrow

Question 51

deterministic effects are proportionate to what ?

Answer 51

severity is proportionate to the dose

Question 52

Radon is produced by what?

Answer 52

the x-ray

Question 53

the X-ray photons in the body are not normally .....?

Answer 53

transmitted

Question 54

why can a structure be more radiopaque than others?

Answer 54

it consists of elements of higher atomic number and has the same diameter

Question 55

what if the object is not in the centre of the detector plate?

Answer 55

the resulting image will be unsharp

Question 56

what does aqusition mean in digital imaging?

Answer 56

the creation of a picture from the electric sign

Question 57

DICOM files are preferred by the owners?

Answer 57

true