X-RAYS

Question 1

How are x-rays produced

Answer 1

When highly energetic electrons interacts with matter

Question 2

When highly energetic electrons interact with matter what happens

Answer 2

Some of their kinetic energy is converted into electromagnetic radiation (99% of energy is lost, converted to great)

Question 3

A device that produces X-rays contains 4 things, list them

Answer 3

An electron source
An evacuated path for electron acceleration
A target electrode
An external; power source to provide high voltage to accelerate electrons

Question 4

The X-ray tube contains?

Answer 4

• the electron source
• the target within an evacuated glass or metal envelope

Question 5

A part of the device that provides protective radiation shielding and cools the X-ray tube insert is called the

Answer 5

Tube housing

Question 6

What shapes the X-ray energy spectrum. What defines the size and shape of the X-ray field

Answer 6

The X-ray beam filters, Collimators

Question 7

What does the X-RAY generator do

Answer 7

• supplies the voltage to accelerate the electrons
• permits control of the X-RAY beam characteristics

Question 8

X-ray beam photons have

Answer 8

• well defined intensity
• penetrability
• spatial distribution

Question 9

What are 4 characteristics of X-RAYS

Answer 9

Invisible
Can not be heard
Have no odour
Are not affected by electric or magnetic fields

Question 10

X-rays are commonly referred to as ____ and have the ability to ____ other substances

Answer 10

Photons, ionize

Question 11

Since X-rays or “photons” have the ability to ionize this means they cause the atoms through which they pass to

Answer 11

eject electrons from their electron shells.

Question 12

X-rays can be detected by

Answer 12

• their ability to ionize other substances
• cause fluorescence
• colour changes in several substances (barium plating cyanide)
• producing changes which can be made visible in photographic film

Question 13

Where are rotating anode X-ray tubes found?

Answer 13

All major diagnostic radiology equipment

Question 14

Where are stationary anode X-ray tubes found

Answer 14

Only in dental equipment and small portable machines

Question 15

An X-ray consists if 2 components, what are they

Answer 15

1. The insert: which is evacuated and is where the X-rays are produced
2. The tube shield: which supports the insert and is responsible for electrical radiation

Question 16

The 5 functions of the X-ray tube is to

Answer 16

• provide a beam of X-rays from as near a point source as possible (focus)
• dissipate the heat produced effectively to prevent damage to the X-ray tube
• provide a consistent quality kVp and quantity mAs of radiation
• allow X-rays to emerge only from the window of the housing of the tube (port)
• provide an electrically safe environment for the practitioner
• the tube us securely supported but still capable of EASY MOVEMENT into any position and then being maintained in that position.