wk 1-5 definitions

Question 1

anode

Answer 1

positively charged terminal in the x-ray tube containing the target

Question 2

bucky tray

Answer 2

metal sliding tray that is positioned under the x-ray table - the grid is on top and the cassette is placed on the lower metal tray

Question 3

calipers

Answer 3

a device used to measure the anatomical part to be radiographed

Question 4

cassette

Answer 4

a metal hinged envelope containing a pair of intensifying screens that hold and protect the x-ray film while in normal light

Question 5

cathode

Answer 5

the negative terminal of the x-ray tube from which electrons are emitted

Question 6

collimator

Answer 6

a device used to restrict the field covered by the x-ray beam

Question 7

contrast

Answer 7

the difference in density of adjacent tissues

Question 8

darkroom

Answer 8

a room which is totally free of light where x-ray film is developed

Question 9

density

Answer 9

the amount of blackness on the developed radiograph

Question 10

developer

Answer 10

a chemical whose primary function is to reduce the exposed silver halide crystals into metallic silver

Question 11

film badge

Answer 11

a photographic film inserted in a small holder used as a radiation monitor

Question 12

fixer

Answer 12

a chemical whose purpose is to convert the undeveloped silver halide crystals left on the film into a soluble compound and dissolve them away

Question 13

FFD

Answer 13

the distance from the x-ray tube to the film

Question 14

focal spot

Answer 14

the area on the surface of the tungsten target that is bombarded by electrons during the production of x-rays

Question 15

grid

Answer 15

a series of thin lean strips contained in a radiolucent material designed to absorb scatter radiation

Question 16

heel effect

Answer 16

unequal distribution of radiation with more rays come out on the cathode end

Question 17

intensifying screens

Answer 17

consist of a thin layer of crystals which are used in pairs in a cassette to reduce the radiation exposure required

Question 18

KVp

Answer 18

determine the penetrating power of the x-ray beam

Question 19

lead aprons and gloves

Answer 19

PPE from scatter radiation only

Question 20

MA-milliampere

Answer 20

a term that describes the number of electrons boiled off the filament

Question 21

mAs

Answer 21

milliampre/second - mA x time = mAs

Question 22

radiation

Answer 22

the propagation of energy through space or matter

Question 23

safe light

Answer 23

a light with a special brown or dark read filter; in a darkroom

Question 24

technique chart

Answer 24

a chart used to set up the mAs and KVp prior to an x-ray exposure

Question 25

timer

Answer 25

device used to control the length of exposure on the x-ray machine

Question 26

x-ray film

Answer 26

a sheet of polyester which has silver halide crystals affixed on both sides; sensitive to light, pressure, and x-ray