radiology

Question 1

5 densities

Answer 1

metal,bone,soft tissue,fat,air

Question 2

most radiopaque (white)

Answer 2

metal

Question 3

most radiolucent (black)

Answer 3

air

Question 4

kVp

Answer 4

kilovoltage peak

increased kVp= faster elecrons more penetrating power

Question 5

target made of

Answer 5

tungsten

Question 6

base of target made of what

Answer 6

copper

Question 7

mA

Answer 7

controls electricity needed that heat the filament

Question 8

intensifying screen functions

Answer 8

constructed of phosphorus bound crystals

crystals convert x rays to fluorescent light

Question 9

target

Answer 9

inside xray tube -anode

made of tungesten base made of copper

Question 10

filament

Answer 10

inside xray tube “focusing cup”

cathode

Question 11

cathode

Answer 11

source of electrons in xray tube

Question 12

anode

Answer 12

target site

Question 13

rotors

Answer 13

i

Question 14

tungsten

Answer 14

target ;high melting point

Question 15

copper

Answer 15

base of target great conductor of heat

Question 16

source image distance and its affects on an image

Answer 16

as a distance increases intensity of beam (radiation) decreases image details increase

Question 17

standard SID

Answer 17

40 (100cm) (FID)

Question 18

inverse square law

Answer 18

the intensity of the xray beam is inversely proprtional to the square of the distance from the source

Question 19

where is heel effect created and how do we utilize it

Answer 19

Appropriate use of the “anode heel effect” of the output beam from an X-ray tube can reduce the effective dose to patients in some common radiological examinations.

Question 20

foreshortening

Answer 20

object not parallel to cassette

shorter than actual size

Question 21

magnification

Answer 21

object parallel but away from casette & towards tube

larger than actual size and edges become blurred

Question 22

elongation

Answer 22

cassette not parallel to object

object becomes longer and one edge is blurred