EX 3 - Properties of XRays

1. Xrays travel in _____ lines and _____ from their source

straight; diverge

What is the xray beam shaped like?

cone-shaped

Where should the CR be?

on the middle of the part

What is another term for xrays?

photons

What is a particle of energy that has no mass?

photon

2. Xrays have many different ______

energies

What are the two beams that xrays have?

heterogeneous and polyenergetic

3. xrays are highly _______

penetrating

Low energy xrays ______ into the body

get absorbed

High energy xrays ___________ the body

go through

T or F: Gamma rays are more penetrating than xrays

true

4. Xrays are _______

invisible

5. Xrays travel at the __________

speed of light

What are 3 possible ways the speed of light can be expressed?

186,000 miles per second

3x10^8 m/s

3x10^10 cm/s

6. Xrays produce __________

scatter radiation

Scatter radiation happens when the ______ enters the patients body

primary beam

What increases when photons are abosrbed?

radiation dose

Which type of radiation occurs when photons travel through the body part and reach the IR?

exit radiation

What is it called when photons strike an object and are then bounced off in other directions?

scatter radiation

One of the effects of scatter radiation is that it will ______ contrast in an image

lower or decrease

Another effects of scatter radiation is that it can __________

increase patient dose

Along with increasing patient does, scatter radiation can also increase_____

personnel dose

What is the largest single source of personnel exposure?

scatter radiation

7. Xrays affect ________emulsions

photographic

Areas with high radiation dose and high receptor exposure are typically _____

dark

Areas with low radiation dose and low receptor exposure are typically _____

light

8. Xrays cause some materials to _______

fluoresce or glow

What glows when hit by radiation?

phosphors

9. Xrays cause _______

biological damage

What ionizes atoms and matter?

xrays

Ionization of atoms can cause cell______ or ______

death or malfunction

10. Xrays cannot be ______ by a lens and cannot be _______ or ______

focused; reflected; refracted

10.2. Xrays have no _____ and no _______charge

mass; electrical