LRA 211 FINAL EXAM STUDY GUIDE
2026/2027 COMPLETE QUESTIONS WITH
VERIFIED CORRECT ANSWERS ||
100% GUARANTEED PASS
<NEWEST VERSION>
1. The earliest atomic theory based on an arrangement similar to the solar
system is attributed to - ANSWER ✔ Rutherford.
2. The three fundamental particles of the atom are the - ANSWER ✔ neutron,
electron, and proton.
3. The atomic nucleus contains - ANSWER ✔ protons and neutrons.
4. The component of the nucleus that has a positive charge and mass is the -
ANSWER ✔ proton.
5. The electron shell closest to the nucleus is lettered - ANSWER ✔ "K".
6. Which of the following is not part of the electromagnetic spectrum? -
ANSWER ✔ Sound
7. When filament electrons enter the anode target, they interact with -
ANSWER ✔ outer shell electrons of tungsten atoms.
,8. When a filament electron knocks out a K shell electron from the tungsten
atom, it leads to - ANSWER ✔ a characteristic x-ray photon.
9. The energy of the characteristic x-ray photon depends on - ANSWER ✔ the
binding energy of the inner-shell electron
the energy level of the filament electron
the shell of the electron that is dropping into the vacancy.
10.A filament electron removes a K shell electron and an M shell electron fills
the vacancy. The K shell binding energy is 69.5 keV and the M shell binding
energy is 2.8 keV. What is the energy of the K-characteristic photon
produced? - ANSWER ✔ 66.7 keV
11.Bremsstrahlung means - ANSWER ✔ braking radiation.
12.The energy of the brems photon depends on - ANSWER ✔ the original
energy of the filament electron
the strength of the attraction between the electron and the nucleus
the energy of the filament electron as it leaves the tungsten atom.
13.The majority of the x-ray photons produced are - ANSWER ✔ brems
photons.
14.Which of the following is the primary factor controlling quantity? -
ANSWER ✔ mAs
15.As the distance increases, the beam quantity reaching a specific area -
ANSWER ✔ decreases.
,16.Classical interactions are also known as - ANSWER ✔ Thomson and
coherent scattering.
17.absorption - ANSWER ✔ The x-ray photons removed from the x-ray beam
as a result of the uptake of their energy by body tissues
18.attenuation - ANSWER ✔ Reduction in the energy or number of photons in
the primary x-ray beam after it interacts with anatomic tissue
19.coherent scattering - ANSWER ✔ An interaction that occurs with low-
energy x-rays, typically below the diagnostic range. The incoming photon
interacts with the atom, causing it to become excited. The x-ray does not
lose energy but changes direction
20.Compton effect - ANSWER ✔ The loss of energy of the incoming photon
when it ejects an outer-shell electron from the atom. The remaining lower-
energy x-ray photon changes direction and may leave the anatomic part.
21.Compton electron - ANSWER ✔ The electron ejected from an atom during a
Compton scattering event.
22.contrast resolution - ANSWER ✔ Used to describe the ability of the imaging
system to distinguish between small objects that attenuate the x-ray beam
similarly in digital imaging.
23.differential absorption - ANSWER ✔ The difference between the x-ray
photons that are absorbed photoelectrically versus those that penetrate the
body.
, 24.dynamic range - ANSWER ✔ The range of exposure intensities that an
image receptor can respond to and acquire image data
25.exit radiation - ANSWER ✔ The attenuated X-ray beam leaves the patient
and is composed of both transmitted and scattered radiation, also called
remnant radiation.
26.fluoroscopy - ANSWER ✔ The use of a continuous beam of x-rays to create
dynamic images of internal structures that can be viewed on a display
monitor.
27.fog - ANSWER ✔ Unwanted exposure on the radiographic image that does
not provide any diagnostic information.
28.image receptor - ANSWER ✔ The device that receives the energy of the x-
ray beam and forms the image of the body part
29.ionization - ANSWER ✔ The removal of an electron from an atom
30.latent image - ANSWER ✔ The invisible image that exists on the image
receptor before it has been processed
31.manifest image - ANSWER ✔ The visible image on the exposed film after
processing
32.matrix - ANSWER ✔ Combination of rows and columns (array) of pixels
that make up a digital image
2026/2027 COMPLETE QUESTIONS WITH
VERIFIED CORRECT ANSWERS ||
100% GUARANTEED PASS
<NEWEST VERSION>
1. The earliest atomic theory based on an arrangement similar to the solar
system is attributed to - ANSWER ✔ Rutherford.
2. The three fundamental particles of the atom are the - ANSWER ✔ neutron,
electron, and proton.
3. The atomic nucleus contains - ANSWER ✔ protons and neutrons.
4. The component of the nucleus that has a positive charge and mass is the -
ANSWER ✔ proton.
5. The electron shell closest to the nucleus is lettered - ANSWER ✔ "K".
6. Which of the following is not part of the electromagnetic spectrum? -
ANSWER ✔ Sound
7. When filament electrons enter the anode target, they interact with -
ANSWER ✔ outer shell electrons of tungsten atoms.
,8. When a filament electron knocks out a K shell electron from the tungsten
atom, it leads to - ANSWER ✔ a characteristic x-ray photon.
9. The energy of the characteristic x-ray photon depends on - ANSWER ✔ the
binding energy of the inner-shell electron
the energy level of the filament electron
the shell of the electron that is dropping into the vacancy.
10.A filament electron removes a K shell electron and an M shell electron fills
the vacancy. The K shell binding energy is 69.5 keV and the M shell binding
energy is 2.8 keV. What is the energy of the K-characteristic photon
produced? - ANSWER ✔ 66.7 keV
11.Bremsstrahlung means - ANSWER ✔ braking radiation.
12.The energy of the brems photon depends on - ANSWER ✔ the original
energy of the filament electron
the strength of the attraction between the electron and the nucleus
the energy of the filament electron as it leaves the tungsten atom.
13.The majority of the x-ray photons produced are - ANSWER ✔ brems
photons.
14.Which of the following is the primary factor controlling quantity? -
ANSWER ✔ mAs
15.As the distance increases, the beam quantity reaching a specific area -
ANSWER ✔ decreases.
,16.Classical interactions are also known as - ANSWER ✔ Thomson and
coherent scattering.
17.absorption - ANSWER ✔ The x-ray photons removed from the x-ray beam
as a result of the uptake of their energy by body tissues
18.attenuation - ANSWER ✔ Reduction in the energy or number of photons in
the primary x-ray beam after it interacts with anatomic tissue
19.coherent scattering - ANSWER ✔ An interaction that occurs with low-
energy x-rays, typically below the diagnostic range. The incoming photon
interacts with the atom, causing it to become excited. The x-ray does not
lose energy but changes direction
20.Compton effect - ANSWER ✔ The loss of energy of the incoming photon
when it ejects an outer-shell electron from the atom. The remaining lower-
energy x-ray photon changes direction and may leave the anatomic part.
21.Compton electron - ANSWER ✔ The electron ejected from an atom during a
Compton scattering event.
22.contrast resolution - ANSWER ✔ Used to describe the ability of the imaging
system to distinguish between small objects that attenuate the x-ray beam
similarly in digital imaging.
23.differential absorption - ANSWER ✔ The difference between the x-ray
photons that are absorbed photoelectrically versus those that penetrate the
body.
, 24.dynamic range - ANSWER ✔ The range of exposure intensities that an
image receptor can respond to and acquire image data
25.exit radiation - ANSWER ✔ The attenuated X-ray beam leaves the patient
and is composed of both transmitted and scattered radiation, also called
remnant radiation.
26.fluoroscopy - ANSWER ✔ The use of a continuous beam of x-rays to create
dynamic images of internal structures that can be viewed on a display
monitor.
27.fog - ANSWER ✔ Unwanted exposure on the radiographic image that does
not provide any diagnostic information.
28.image receptor - ANSWER ✔ The device that receives the energy of the x-
ray beam and forms the image of the body part
29.ionization - ANSWER ✔ The removal of an electron from an atom
30.latent image - ANSWER ✔ The invisible image that exists on the image
receptor before it has been processed
31.manifest image - ANSWER ✔ The visible image on the exposed film after
processing
32.matrix - ANSWER ✔ Combination of rows and columns (array) of pixels
that make up a digital image
