問題一覧
1
* Described in terms of their frequency.
* Have the longest wavelength and lowest energy.
* Carry signals for television, cellular phones, and radio stations.
* Non-ionizing radiation.
Radiowaves
2
* Have wavelengths shorter than radio waves.
* Can be used to heat food, or used in radar.
* Non-ionizing
Microwaves
3
* Also known as IR
* Lies between the visible light and microwaves.
* Can be observed in objects producing heat.
* Broken into three categories: Near, Mid, and Far.
* Far = closest to microwaves
* Near = closest to visible light
* Non-ionizing
Infrared Radiation
4
* Described in terms of wavelength.
* The only part of the EM Spectrum visible to the human eyes.
* Occupies the smallest area of the spectrum.
Visible Light
5
* Have wavelengths ranging from 400 nm to 700 nm.
* Photons of light travel in a straight line but can be deviated by refraction.
* Non-ionizing
Visible Light
6
* Located between the visible light and x-ray spectrum.
* Responsible for molecular interactions that can cause sunburn.
* Can be both non-ionizing and ionizing
Ultraviolet Light
7
type of uv that is closest to the visible light spectrum. Used as black light.
Near UV
8
type of uv that is mostly absorbed by the ozone layer.
Middle UV
9
type of uv that is absorbed by the ozone layer. lonizing part of the UV
Far UV
10
* Characterized by the energy contained in its photon.
* Energy Range: 10 keV to 50 keV
* Have higher frequency and shorter wavelength than light, thus having more energy.
X-rays
11
* Originate from the electrons of an atom.
* Some of this (like the ones used in Linear Accelerators), can achieve energies higher than gamma
* Ionizing
X-rays
12
* Have the highest frequency and shortest wavelength, thus having the highest energy in the spectrum.
* Only differs from x-rays due to its origin (nucleus).
* ionizing
Gamma rays
13
can be represented by using a sinewave
Electromagnetic radiation
14
Parts of Sinewave
Wavelength, Crest, Valley, Amplitude
15
travel in the form of photons that have the velocity of the speed of light.
Electromagnetic radiation
16
One-half the range from crest to valley over which the sinewave varies.
Amplitude
17
* The number of wavelengths that pass a point of observation per second.
* Represented by f
* Unit of measurement = Hertz (Hz)
Frequency
18
* The distance from one crest to another, one valley to another, or from any point on the sinewave to the next corresponding point.
* Represented by Lambda (^)
* Unit of measurement = meter (m)
Wavelength
19
* Measured in electron volts (eV)
* As the frequency increases, the wavelength decreases, and the energy increases.
Energy
20
Velocity and Frequency’s Relationship are
Directly Proportional
21
Velocity and Wavelength
Inversely Proportional
22
Frequency and Wavelength
Inversely Proportional
23
used to mathematically express the relationship of these three parameters
* Used for both soundwaves and electromagnetic energy
Wave Equation
24
* Used for electromagnetic energy
* Simplified method as the velocity of electromagnetic energy is the same.
Electromagnetic Wave Equation
25
interact with matter most easily when the matter is approximately the same size as it
Photons
26
interacts with living cells, such as the rods and cones of the eyes
Light
27
interacts with molecules
Ultraviolet
28
interact with electrons & atoms
X-rays
29
Photons of what tend to behave as particles
X-rays
30
Photons of what tend to behave as waves
Light
31
* This describes the relationship of radiation intensity and the distance from the radiation source.
* can also be used to calculate radiation exposure, radiation dose, and Kerma.
Inverse Square Law
32
The intensity of a radiation is directly proportional to the square of the distance of the object from the source. True or False
False. Inversely Proportional (Inverse Square Law)
33
emitted is spread out over an increasingly larger
Total radiation
34
Radiologic unit that is
* The amount of radiation delivered to a point.
* Measures how much ionization occurs in the air through which radiation travels.
Exposure/Intensity
35
what radiologic unit is this:
* Conventional Unit: Roentgen
* Sl Unit: Coulomb per Kilogram of Air (C/Kg)
* 1 Roentgen = 2.58 x 10^-4 C/Kg or 1 C/kg = 3876 R
Exposure/Intensity
36
Radiologic Unit that is
* A unit of radiation exposure or intensity
* The kinetic energy transferred from photons to electrons during ionization and excitation.
* Related to, but not the same as absorbed dose.
Air Kerma (Kinetic Energy Released in Matter)
37
what radiologic unit is this
* Si Unit: joule per kilogram (1/kg)
* 1J/kg = 1
Air Kerma
38
* MEASURE of the ENERGY DEPOSITED IN A MEDIUM by ionizating radiation.
* It is the radiation absorbed per unit mass.
Absorbed Dose
39
what radiologic unit is this?
* Conventional Unit: Rads
* Sl Unit: Gray or J/kg
* 100 Rads = 1 Gray
Absorbed Dose
40
* Used to express the dose received by workers in their environment.
Dose Equivalent
41
* Used to express relative risk to humans, both patients and personnel.
* The equivalent whole-body dose and takes into account the specific organs and areas of the body irradiated.
Effective Dose
42
what 2 radiologic unit is this?
* Conventional Unit: Rems (Roentgen Equivalent Man)
* Sl Unit: Sieverts (Sv)
* 100 rems = 1 Sv
Effective Dose and Dose Equivalent
43
* It is the number of disintegration per unit time.
* Measure of ionizing radiation released by a radioactive material.
Radioactivity
44
what radiologic unit is this?
* Conventional Unit: Curie (Ci)
* Si Unit: Becquerel (Bq)
* 1 Curie = 3.7 × 10^10 Bq
Radioactivity
45
have the responsibility of reducing unnecessary exposure of the patients and personnel.
Radiologic Technologists
問題一覧
1
* Described in terms of their frequency.
* Have the longest wavelength and lowest energy.
* Carry signals for television, cellular phones, and radio stations.
* Non-ionizing radiation.
Radiowaves
2
* Have wavelengths shorter than radio waves.
* Can be used to heat food, or used in radar.
* Non-ionizing
Microwaves
3
* Also known as IR
* Lies between the visible light and microwaves.
* Can be observed in objects producing heat.
* Broken into three categories: Near, Mid, and Far.
* Far = closest to microwaves
* Near = closest to visible light
* Non-ionizing
Infrared Radiation
4
* Described in terms of wavelength.
* The only part of the EM Spectrum visible to the human eyes.
* Occupies the smallest area of the spectrum.
Visible Light
5
* Have wavelengths ranging from 400 nm to 700 nm.
* Photons of light travel in a straight line but can be deviated by refraction.
* Non-ionizing
Visible Light
6
* Located between the visible light and x-ray spectrum.
* Responsible for molecular interactions that can cause sunburn.
* Can be both non-ionizing and ionizing
Ultraviolet Light
7
type of uv that is closest to the visible light spectrum. Used as black light.
Near UV
8
type of uv that is mostly absorbed by the ozone layer.
Middle UV
9
type of uv that is absorbed by the ozone layer. lonizing part of the UV
Far UV
10
* Characterized by the energy contained in its photon.
* Energy Range: 10 keV to 50 keV
* Have higher frequency and shorter wavelength than light, thus having more energy.
X-rays
11
* Originate from the electrons of an atom.
* Some of this (like the ones used in Linear Accelerators), can achieve energies higher than gamma
* Ionizing
X-rays
12
* Have the highest frequency and shortest wavelength, thus having the highest energy in the spectrum.
* Only differs from x-rays due to its origin (nucleus).
* ionizing
Gamma rays
13
can be represented by using a sinewave
Electromagnetic radiation
14
Parts of Sinewave
Wavelength, Crest, Valley, Amplitude
15
travel in the form of photons that have the velocity of the speed of light.
Electromagnetic radiation
16
One-half the range from crest to valley over which the sinewave varies.
Amplitude
17
* The number of wavelengths that pass a point of observation per second.
* Represented by f
* Unit of measurement = Hertz (Hz)
Frequency
18
* The distance from one crest to another, one valley to another, or from any point on the sinewave to the next corresponding point.
* Represented by Lambda (^)
* Unit of measurement = meter (m)
Wavelength
19
* Measured in electron volts (eV)
* As the frequency increases, the wavelength decreases, and the energy increases.
Energy
20
Velocity and Frequency’s Relationship are
Directly Proportional
21
Velocity and Wavelength
Inversely Proportional
22
Frequency and Wavelength
Inversely Proportional
23
used to mathematically express the relationship of these three parameters
* Used for both soundwaves and electromagnetic energy
Wave Equation
24
* Used for electromagnetic energy
* Simplified method as the velocity of electromagnetic energy is the same.
Electromagnetic Wave Equation
25
interact with matter most easily when the matter is approximately the same size as it
Photons
26
interacts with living cells, such as the rods and cones of the eyes
Light
27
interacts with molecules
Ultraviolet
28
interact with electrons & atoms
X-rays
29
Photons of what tend to behave as particles
X-rays
30
Photons of what tend to behave as waves
Light
31
* This describes the relationship of radiation intensity and the distance from the radiation source.
* can also be used to calculate radiation exposure, radiation dose, and Kerma.
Inverse Square Law
32
The intensity of a radiation is directly proportional to the square of the distance of the object from the source. True or False
False. Inversely Proportional (Inverse Square Law)
33
emitted is spread out over an increasingly larger
Total radiation
34
Radiologic unit that is
* The amount of radiation delivered to a point.
* Measures how much ionization occurs in the air through which radiation travels.
Exposure/Intensity
35
what radiologic unit is this:
* Conventional Unit: Roentgen
* Sl Unit: Coulomb per Kilogram of Air (C/Kg)
* 1 Roentgen = 2.58 x 10^-4 C/Kg or 1 C/kg = 3876 R
Exposure/Intensity
36
Radiologic Unit that is
* A unit of radiation exposure or intensity
* The kinetic energy transferred from photons to electrons during ionization and excitation.
* Related to, but not the same as absorbed dose.
Air Kerma (Kinetic Energy Released in Matter)
37
what radiologic unit is this
* Si Unit: joule per kilogram (1/kg)
* 1J/kg = 1
Air Kerma
38
* MEASURE of the ENERGY DEPOSITED IN A MEDIUM by ionizating radiation.
* It is the radiation absorbed per unit mass.
Absorbed Dose
39
what radiologic unit is this?
* Conventional Unit: Rads
* Sl Unit: Gray or J/kg
* 100 Rads = 1 Gray
Absorbed Dose
40
* Used to express the dose received by workers in their environment.
Dose Equivalent
41
* Used to express relative risk to humans, both patients and personnel.
* The equivalent whole-body dose and takes into account the specific organs and areas of the body irradiated.
Effective Dose
42
what 2 radiologic unit is this?
* Conventional Unit: Rems (Roentgen Equivalent Man)
* Sl Unit: Sieverts (Sv)
* 100 rems = 1 Sv
Effective Dose and Dose Equivalent
43
* It is the number of disintegration per unit time.
* Measure of ionizing radiation released by a radioactive material.
Radioactivity
44
what radiologic unit is this?
* Conventional Unit: Curie (Ci)
* Si Unit: Becquerel (Bq)
* 1 Curie = 3.7 × 10^10 Bq
Radioactivity
45
have the responsibility of reducing unnecessary exposure of the patients and personnel.
Radiologic Technologists