properties of xrays

Question 1

xrays are?

Answer 1

electromagnetic rays that are not detected by any senses. go at 186,000 miles per second

Question 2

what is hard radiation?

Answer 2

produced by xrays and gamma rays short wavelength and high penetrating power

Question 3

soft radiation

Answer 3

longer wavelength with less enerfy an matter d less ability to penetrate

Question 4

7 examples of soft radiation

Answer 4

electric, television, microwave, infrared, visible light, ultraviolet light

Question 5

what is ionizing radiation?

Answer 5

radiation produced when xrays produce ions in their passage through matter

Question 6

penetrating power depends on 3 things:

Answer 6

wavelength, distance, density

Question 7

wavelength power means

Answer 7

the shorter the wavelength and the higher the frequency, the greater the penetration

Question 8

xray generation is when?

Answer 8

x rays are generated when matter is struck by electrons traveling at a high rate of speed.

Question 9

what must happen for x ray generation?

Answer 9

must be source of electrons, high voltage acceleration and a target

Question 10

what 3 parts make up x ray machine?

Answer 10

control panel, extension arm, and tubhead

Question 11

control panel is composed of?

Answer 11

on/off switch, peak kilovolt knob, milliampere setting, timing dial and exposure button

Question 12

extension arm does what?

Answer 12

contains the wires necessary to connect the control panel to the tubehead

Question 13

xray tube is?

Answer 13

responsible for generating xrays contained within the tubehead

Question 14

tubehead is?

Answer 14

contains XRAY TUBE, transformers, tubhead seal and aluminum filters

Question 15

what is a cathode?

Answer 15

NEGATIVELY CHARGED electrode

Question 16

filament is?

Answer 16

SOURCE OF ELECTRON inside the tube- 1 cm in length

Question 17

focusing cup is?

Answer 17

NEGATIVELY CHARGED concave reflector cup of molybdenum

Question 18

focal spot is?

Answer 18

the focusing cup focuses electrons into a concentrated beam and directs them onto this spot

Question 19

what is an anode?

Answer 19

positively charged electron

Question 20

anode has tungsten target which means?

Answer 20

converts kinetic energy into x ray photons 1% of the energy hits the target

Question 21

anode has copper stem which means?

Answer 21

99% of energy becomes heat and dissapates into the stem

Question 22

Power supply does?

Answer 22

provides power supply to heat x ray tube filament

Question 23

Step down transformer

Answer 23

controlled by millliamperage switch reduces AC current voltage by 3-5 volts

Question 24

Step up transformer

Answer 24

controlled by KILOVOLT PEAK SELECTOR DIAL. controls voltage between anode and cathode x ray tube

Question 25

Timer

Answer 25

controls time that the tube current flows and xrays are produced

Question 26

filtration

Answer 26

an aluminum disk placed over tubehead that decreases the patients exposure

Question 27

collimators

Answer 27

increase film quality and decrease exposure