Test 1 - Week 1-4

Question 1

Who discovered the x ray

Answer 1

german scientist Wilheim Conrad Roentgen in 1895

Question 2

How did he discover it?

Answer 2

He made a platinocyanide plate glow and wanted to figuring out how to prevent it from glowing

Question 3

List the properties of X-Rays. There are 12.

Answer 3

Are invisible
Are electrically neutral
Have no mass
Travel as the speed of light in a vacuum
Cannot be focused by a lens
Form of polyenergetic (heterogenous beam)
Can be produced in a range of energies (kVp)
Travel in straight lines
Cause florescence in certains substances
Can cause chemical changes to occur in radiographic and photographic
Can be absopbed or scattered by tissues in the body; can produce scattered and secondary radiation
Can cause chemical and biological damage to living tissue

Question 4

X-Rays are described as:

Answer 4

invisible, but they travel in straight lines at the speed of light

Question 5

An element is the smallest part of a ____________. And the smallest part of an element is an ______.

Answer 5

substance
atom

Question 6

the electrons are held in place by:

Answer 6

The positive charge of protons

Question 7

On the table of elements how are the elements arranged?

Answer 7

all elements are arranged in specific groups

Question 8

A prinicpal characteristic of matter is _____ and ______.

Answer 8

mass and weight

Question 9

The electromagnetic specrum represents:

Answer 9

the vast specrum from x-rays to radio waves

Question 10

Energy can be represented by both

Answer 10

waves and particles

Question 11

A sinusodial wave represents x-ray energy as waves how?

Answer 11

It has frequency and amplitude in its definition

Question 12

Energy as particles is represented as

Answer 12

units of motion or as packets

Question 13

What do atoms consist of?

Answer 13

mostly emply space but also protons, neutrons, and electrons

Question 14

Boiling _________ off the filament of the cathode is the first step in creating x-rays.

Answer 14

electrons

Question 15

What happens with the x-ray generator is turned on?

Answer 15

Heat is applied to the cathode of the x-ray tube, electrons are boiled off in an effect called thermionic emission

Question 16

The conversion of ____ into ______ is used to create x-rays.

Answer 16

matter into energy

Question 17

what are the two major types of energy used in x-ray technology?

Answer 17

elecrical energy and electromagnetism

Question 18

describe a sinusoidal wave

Answer 18

it is the tracing of the crests and troughs of a wave.
they have a high and low point, with time being the constant that runs through the middle

Question 19

What is frequency?

Answer 19

the number of waves passing a given point per given unit of time

Question 20

Do shorter or longer wavelenths penetrate more tissue effectively? With low or high frequency?

Answer 20

shorter wavelengths with higher frequencies

Question 21

What is the main component in the x-ray circuit?

Answer 21

the x-ray tube
it is the structure that actually produced the x-rays

Question 22

What are the four main criteria of a closed circuit?

Answer 22

1. It must have enough power to eventually produce x-rays
2. It must have selections where the power can be increased or decreased as necessary
3. The power must travel in the same direction through the x-ray tube
4. There must be a way to produce free electrons and with enough energy to produce x-rays

Question 23

Describe the x-ray tube.

Answer 23

The x-ray tube is a special heat-resistant glass enclosure that houses a cathode and anode. It is approximately 30 cm long and 20 cm in diameter . It is shielded with a metal covering which constricts any radiation from exiting the tube other than at the tube port

Question 24

What is the unit used to measure the electric current that activates the x-ray tube?

Answer 24

Amperage
Or milliamperage in radiography

Question 25

What are the four important factors involved in transmitting the electricity to the x-ray tube?

Answer 25

Voltage
Current
Resistance
Time

Question 26

What is the factor that slows the current as it travels through the wire?

Answer 26

Resistance

Question 27

Is it better to have long or short cables attached to the x-ray generator?

Answer 27

Short

Question 28

What is the operating consul typically referred to as?

Answer 28

The generator

Question 29

What factors can be selected on the operating console?

Answer 29

kV, mA, and time

Question 30

What is the first component in the x-ray circuit?

Answer 30

Voltage

Question 31

What is the timer on the x-ray generator do?

Answer 31

It is the time over which the radiation is produced

Question 32

What initiates exposure and what ends the exposure?

Answer 32

The operator initiate the exposure and the preset time ends the exposure

Question 33

Describe the cathode.

Answer 33

A cathode typically has two filments, large and small. The large filament is used when large body parts are examined whereas the small filaments are used from detailed work such as extremities and small pocket pets. The filaments are labeled as large and small focus.