Moa Chapters 1, 2, 4, 5 Practice Test
(79).webp "Moa Chapters 1, 2, 4, 5 Practice Test - Quiz")
Questions and Answers
- 1.
The area of the exam room which is protected by a lead wall and where the radiographer stands while making x-ray exposures is the
- A.
Transformer cabinet
- B.
Tube port
- C.
Control booth
- D.
Bucky
Correct Answer
C. Control boothExplanation
The control booth is the area in the exam room where the radiographer stands while making x-ray exposures. It is protected by a lead wall to shield the radiographer from radiation exposure. The control booth allows the radiographer to operate the x-ray equipment and control the settings while being safely shielded from the radiation. The other options, such as the transformer cabinet, tube port, and bucky, do not provide the same level of protection for the radiographer and are not specifically used for making x-ray exposures.Rate this question:
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- 2.
An invisible line in the center of the x-ray beam which is perpendicular to the long axis of the x-ray tube is referred to as the
- A.
Radiation field
- B.
Primary beam
- C.
Central ray
- D.
IR
Correct Answer
C. Central rayExplanation
The central ray refers to an invisible line in the center of the x-ray beam that is perpendicular to the long axis of the x-ray tube. It is the main component of the x-ray beam and is responsible for delivering the radiation to the patient or imaging receptor. The central ray plays a crucial role in determining the quality and accuracy of the x-ray image.Rate this question:
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- 3.
An invisible x-ray image prior to being processed is referred to as
- A.
Latent
- B.
Manifest
- C.
Visible
- D.
Ghost
Correct Answer
A. LatentExplanation
An invisible x-ray image that has not yet been processed is called "latent." This term refers to the image being present but not yet visible or developed. It implies that the image is hidden or concealed until it undergoes processing to become visible. The other options, "manifest," "visible," and "ghost," do not accurately describe an x-ray image that has not been processed yet.Rate this question:
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- 4.
The absorption of x-rays by tissues of the body is referred to as
- A.
Scatter
- B.
Fog
- C.
Remnant
- D.
Attenuation
Correct Answer
D. AttenuationExplanation
Attenuation refers to the process of reducing the intensity or strength of x-rays as they pass through the tissues of the body. When x-rays interact with the atoms in the tissues, they can be absorbed, scattered, or transmitted. In the case of attenuation, some of the x-rays are absorbed by the tissues, leading to a decrease in their intensity. This absorption is influenced by factors such as the density and composition of the tissues. Therefore, attenuation is the correct term to describe the absorption of x-rays by tissues.Rate this question:
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- 5.
Scatter radiation has less energy than the primary beam
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Scatter radiation refers to the secondary radiation that is produced when the primary beam interacts with the patient's body. This secondary radiation has less energy than the primary beam because it undergoes multiple interactions and loses some of its energy in the process. Therefore, the statement that scatter radiation has less energy than the primary beam is true.Rate this question:
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- 6.
Radiation that strikes the IR after exiting the patient which contributes to forming the image is referred to as
- A.
Attenuation
- B.
Absorption
- C.
Remnant
- D.
Fog
Correct Answer
C. RemnantExplanation
Remnant refers to the radiation that strikes the image receptor (IR) after passing through the patient. This radiation contributes to the formation of the image. Attenuation refers to the reduction in intensity of the radiation as it passes through the patient, absorption refers to the process of the patient's tissues absorbing some of the radiation, and fog refers to unwanted background radiation that can degrade the quality of the image. Therefore, remnant is the correct answer as it specifically describes the radiation that forms the image after exiting the patient.Rate this question:
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- 7.
Radiation exiting the tube and prior to striking the patient is referred to as
- A.
Scatter radiation
- B.
Primary radiation
- C.
Secondary radiation
- D.
Remnant radiation
Correct Answer
B. Primary radiationExplanation
Primary radiation refers to the radiation that exits the tube and strikes the patient directly without any interaction or scattering. It is the initial beam of radiation that is emitted from the source and travels in a straight line towards the patient. This radiation is of high energy and intensity, and it is the main source of radiation used in medical imaging procedures.Rate this question:
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- 8.
Where is the image originally recorded in a computed radiology (CR) system
- A.
On a film
- B.
In the reader
- C.
On the phosphor material of the cassette
- D.
On a computer
Correct Answer
C. On the phosphor material of the cassetteExplanation
In a computed radiology (CR) system, the image is originally recorded on the phosphor material of the cassette. In CR systems, the patient's X-ray exposure is captured by a cassette containing a phosphor plate. When the cassette is exposed to X-rays, the phosphor material absorbs the energy and stores it as an invisible image. Later, the cassette is placed in a reader, where the stored energy is released and converted into a digital image that can be viewed on a computer. Therefore, the image is initially recorded on the phosphor material of the cassette before being processed and viewed on a computer.Rate this question:
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- 9.
The boxlike device attached to the x-ray tube that allows the radiographer to adjust x-ray field size is referred to as a
- A.
Bucky
- B.
Tube stand
- C.
Grid
- D.
Collimator
Correct Answer
D. CollimatorExplanation
A collimator is a boxlike device attached to the x-ray tube that allows the radiographer to adjust the x-ray field size. It is used to restrict the x-ray beam to a specific area of interest and minimize unnecessary radiation exposure to the patient. By adjusting the collimator, the radiographer can control the size and shape of the x-ray beam, ensuring that only the desired area is exposed to radiation. This helps in obtaining clear and accurate images while reducing the risk of unnecessary radiation dosage.Rate this question:
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- 10.
A device used to protect the IR from being "fogged" by scatter radiation is referred to as a
- A.
Bucky
- B.
Tube stand
- C.
Grid
- D.
Collimator
Correct Answer
C. GridExplanation
A grid is a device used to protect the IR (image receptor) from scatter radiation. Scatter radiation is unwanted radiation that can cause fogging on the IR, reducing image quality. A grid consists of lead strips or plates that are placed between the patient and the IR. It allows primary radiation (the radiation that passes straight through the patient) to reach the IR while absorbing or redirecting scatter radiation. This helps to improve image contrast and clarity by reducing the amount of scatter radiation reaching the IR.Rate this question:
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- 11.
The main source of scatter radiation is is called
- A.
The x-ray tube
- B.
The patient
- C.
The table
- D.
The bucky
Correct Answer
B. The patientExplanation
Scatter radiation refers to the radiation that is deflected from its original path and scatters in different directions. In the context of medical imaging, scatter radiation is primarily caused by interactions between the X-ray beam and the patient's body tissues. As X-rays pass through the patient, they can be scattered in various directions, leading to unwanted exposure to radiation for both the patient and the healthcare personnel. Therefore, the patient is the main source of scatter radiation in this scenario.Rate this question:
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- 12.
X-rays were discovered in 1895 by Thomas Edison
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The statement "X-rays were discovered in 1895 by Thomas Edison" is false. X-rays were actually discovered by Wilhelm Conrad Roentgen in 1895, not Thomas Edison. Roentgen was a German physicist who accidentally discovered X-rays while experimenting with cathode rays. Edison, on the other hand, was an American inventor and businessman known for his contributions to the development of various devices such as the phonograph and the electric light bulb.Rate this question:
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- 13.
Unwanted image exposure caused by scatter radiation is called
- A.
Primary
- B.
Remnant
- C.
Attenuation
- D.
Fog
Correct Answer
D. FogExplanation
Fog refers to the unwanted image exposure caused by scatter radiation. When X-rays pass through the body, some of them are scattered, leading to a loss of image clarity. This scattering creates a hazy appearance on the X-ray film or image, which is commonly referred to as fog. It can obscure important details and reduce the overall quality of the image, making it harder for medical professionals to accurately diagnose and interpret the X-ray.Rate this question:
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- 14.
What is the proper term for "pictures" produced with x-rays
- A.
Radiographs
- B.
Lithographs
- C.
Prints
- D.
Photographs
Correct Answer
A. RadiographsExplanation
Radiographs are the proper term for "pictures" produced with x-rays. X-rays are used in medical imaging to create images of the internal structures of the body. These images, known as radiographs, allow healthcare professionals to diagnose and monitor various medical conditions. The term "radiographs" specifically refers to images produced using x-rays, distinguishing them from other types of pictures such as lithographs, prints, or photographs.Rate this question:
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- 15.
Which organization certifies individuals who successfully complete an exam in radiography
- A.
ASRT
- B.
ARRT
- C.
JRCERT
- D.
AMA
Correct Answer
B. ARRTExplanation
The American Registry of Radiologic Technologists (ARRT) is the organization that certifies individuals who successfully complete an exam in radiography. They are responsible for setting the standards and requirements for certification in the field of radiography, ensuring that individuals have the necessary knowledge and skills to practice safely and effectively. The ARRT certification is widely recognized and respected in the industry, and it demonstrates a high level of competence and professionalism in the field of radiography.Rate this question:
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- 16.
Which of the following does not use radiation to create images
- A.
Radiography
- B.
Mammography
- C.
CT
- D.
MRI
Correct Answer
D. MRIExplanation
MRI (Magnetic Resonance Imaging) does not use radiation to create images. Instead, it uses a strong magnetic field and radio waves to generate detailed images of the body's internal structures. This non-invasive imaging technique is particularly useful for visualizing soft tissues, such as the brain, muscles, and organs, without exposing the patient to ionizing radiation.Rate this question:
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- 17.
A physician who interprets medical images and performs radiographic procedures is referred to as a
- A.
Radiologist
- B.
Radiographer
- C.
Technologist
- D.
X-ray tech
Correct Answer
A. RadiologistExplanation
A physician who interprets medical images and performs radiographic procedures is referred to as a radiologist. Radiologists are medical doctors who specialize in diagnosing and treating diseases and injuries using medical imaging techniques such as X-rays, CT scans, MRI scans, and ultrasound. They are trained to interpret the images and provide accurate diagnoses based on their findings. Radiographers, technologists, and X-ray techs are also involved in performing radiographic procedures, but they do not have the same level of medical training and expertise as radiologists.Rate this question:
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- 18.
The primary x-ray beam exits the
- A.
Tube housing
- B.
Tube port
- C.
Patient
- D.
IR
Correct Answer
B. Tube portExplanation
The correct answer is "tube port". The tube port refers to the opening in the tube housing through which the primary x-ray beam exits. This is the pathway through which the x-ray beam travels from the x-ray tube to the patient and then to the image receptor (IR).Rate this question:
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- 19.
Which of the following are forms of matter1.electric current2.solids3.gasses
- A.
1
- B.
1 & 2
- C.
2 & 3
- D.
1, 2 & 3
Correct Answer
D. 1, 2 & 3Explanation
The correct answer is 1, 2 & 3. Electric current, solids, and gases are all forms of matter. Electric current is the flow of electric charge through a conductor, and it consists of moving electrons or ions. Solids are a state of matter that have a definite shape and volume, with particles that are closely packed together. Gases are a state of matter that have no definite shape or volume, with particles that are spread out and move freely. Therefore, all three options are correct forms of matter.Rate this question:
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- 20.
These are the building blocks of all matter
- A.
Electrons
- B.
Atoms
- C.
Molecules
- D.
Cells
Correct Answer
B. AtomsExplanation
Atoms are the smallest units of matter and are considered the building blocks of all matter. They are composed of protons, neutrons, and electrons. Atoms combine together to form molecules, which in turn combine to form cells, the basic units of life. Therefore, atoms are the fundamental components from which all matter is made, making them the correct answer.Rate this question:
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- 21.
The quantity of matter which takes up physical space is referred to as:
- A.
Inertia
- B.
Velocity
- C.
Mass
- D.
Atomic number
Correct Answer
C. MassExplanation
Mass is the correct answer because it refers to the quantity of matter that occupies physical space. It is a fundamental property of matter and is measured in units like kilograms or pounds. Inertia, on the other hand, is the resistance of an object to changes in its motion, velocity is the rate of change of an object's position, and atomic number is a property specific to atoms indicating the number of protons in its nucleus.Rate this question:
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- 22.
Which of the following are particles found in orbits surrounding the nucleus of an atom
- A.
Electron
- B.
Neutron
- C.
Proton
- D.
Mass
Correct Answer
A. ElectronExplanation
Electrons are particles found in orbits surrounding the nucleus of an atom. They have a negative charge and are much smaller in mass compared to protons and neutrons. Electrons are responsible for the chemical behavior of atoms and are involved in the formation of chemical bonds.Rate this question:
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- 23.
Which of the following is positively charged
- A.
Electron
- B.
Neutron
- C.
Proton
- D.
Ion
Correct Answer
C. ProtonExplanation
Protons are positively charged particles found in the nucleus of an atom. They have a positive electrical charge, which is equal in magnitude but opposite in sign to the negative charge of an electron. Neutrons are neutral particles, while electrons are negatively charged. Ions can be positively or negatively charged depending on whether they have gained or lost electrons.Rate this question:
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- 24.
An atom that has lost or gained an electron is referred to as an
- A.
Isotope
- B.
Ion
- C.
Electron
- D.
Nuclide
Correct Answer
B. IonExplanation
An atom that has lost or gained an electron is referred to as an ion. When an atom loses an electron, it becomes positively charged and is called a cation. On the other hand, when an atom gains an electron, it becomes negatively charged and is called an anion. Ions play a crucial role in chemical reactions and the formation of compounds.Rate this question:
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- 25.
This type of energy has a wave-like form
- A.
Magnetic energy
- B.
Chemical energy
- C.
Kinetic energy
- D.
Electromagnetic
Correct Answer
D. ElectromagneticExplanation
Electromagnetic energy is the correct answer because it is the type of energy that has a wave-like form. Electromagnetic energy consists of waves of electric and magnetic fields that travel through space. It includes various forms of energy such as visible light, radio waves, microwaves, and X-rays. These waves have both electric and magnetic components that oscillate perpendicular to each other and to the direction of wave propagation, creating a wave-like form. Therefore, electromagnetic energy fits the description provided in the question.Rate this question:
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- 26.
This term is used to describe the distance between the crests of two adjacent waves
- A.
Amplitude
- B.
Wavelength
- C.
Frequency
- D.
Hertz
Correct Answer
B. WavelengthExplanation
Wavelength is the correct answer because it refers to the distance between the crests of two adjacent waves. It is a measure of the length of one complete wave cycle and is usually represented by the Greek letter lambda (λ). Wavelength is an important concept in understanding wave phenomena and is commonly used in various fields such as physics, optics, and telecommunications.Rate this question:
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- 27.
The frequency of a wave measures
- A.
The distance between crests of 2 adjacent waves
- B.
Number of crests in a cycle
- C.
Number of complete wave cycles passing a given point per second
- D.
The number wave crests that pass a given point per second
Correct Answer
D. The number wave crests that pass a given point per secondExplanation
The frequency of a wave measures the number of wave crests that pass a given point per second. This means that it quantifies how many complete wave cycles occur within a specific time frame at a specific location. It is not related to the distance between crests or the number of crests in a cycle, but rather focuses on the rate at which wave crests pass a particular point.Rate this question:
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- 28.
Which of the following has the shortest wavelength?
- A.
Radio waves
- B.
X-rays
- C.
Microwaves
- D.
UV light
Correct Answer
B. X-raysExplanation
X-rays have the shortest wavelength among the given options. X-rays have very high energy and short wavelengths, which allows them to penetrate matter easily. This property makes them useful in medical imaging and industrial applications. Radio waves, microwaves, and UV light have longer wavelengths compared to x-rays.Rate this question:
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- 29.
Which of the following is a correct statement regarding x-rays
- A.
They can penetrate matter
- B.
They cause radioactivity
- C.
They have a negative charge
- D.
They are visible
Correct Answer
A. They can penetrate matterExplanation
X-rays can penetrate matter because they have high energy and short wavelengths. This allows them to pass through materials that are opaque to visible light, such as human tissue. X-rays are commonly used in medical imaging to create images of bones and internal organs. However, they do not cause radioactivity, have a negative charge, or are visible to the human eye.Rate this question:
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- 30.
All electromagnetic energy travels at the speed of light
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
According to the laws of physics, electromagnetic energy, which includes light, travels at a constant speed in a vacuum, known as the speed of light. This speed is approximately 299,792,458 meters per second. Therefore, it is correct to say that all electromagnetic energy travels at the speed of light.Rate this question:
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- 31.
This is defined as the smallest unit of electromagnetic energy
- A.
Ion
- B.
Electron
- C.
Proton
- D.
Photon
Correct Answer
D. PhotonExplanation
A photon is the correct answer because it is defined as the smallest unit of electromagnetic energy. Photons are particles of light and they have no mass or charge. They carry energy and can behave both as particles and waves. When an atom or molecule absorbs or emits energy in the form of light, it does so in discrete packets called photons. Therefore, a photon is the smallest unit of electromagnetic energy.Rate this question:
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- 32.
80 kilovolts is the same as
- A.
80,000 volts
- B.
80,000 amps
- C.
80 volts
- D.
80 amps
Correct Answer
A. 80,000 voltsExplanation
The correct answer is 80,000 volts because kilovolts is a unit of electrical potential difference, and 1 kilovolt is equal to 1,000 volts. Therefore, 80 kilovolts would be equal to 80,000 volts.Rate this question:
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- 33.
Ionization is the process of an atom gaining or losing a
- A.
Proton
- B.
Neutron
- C.
Electron
- D.
Isotope
Correct Answer
C. ElectronExplanation
Ionization is the process by which an atom gains or loses an electron. When an atom gains an electron, it becomes negatively charged and is called an anion. Conversely, when an atom loses an electron, it becomes positively charged and is called a cation. This process is essential in many chemical reactions and plays a crucial role in the formation of compounds. Therefore, the correct answer is electron.Rate this question:
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- 34.
Of the following, which are characteristics of x-rays1.travel in straigh lines2. can cause biological effects in tissue3.travel at the speed of light
- A.
1
- B.
1 & 2
- C.
2 & 3
- D.
1,2, & 3
Correct Answer
D. 1,2, & 3Explanation
X-rays are a form of electromagnetic radiation that can travel in straight lines, which is why they can be used to create clear images of internal structures. They also have enough energy to cause biological effects in tissues, which is why protective measures are necessary when working with them. Additionally, x-rays travel at the speed of light, allowing for rapid imaging and diagnosis. Therefore, all three characteristics listed (1, 2, and 3) are true for x-rays.Rate this question:
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- 35.
The x-ray tube is made of
- A.
Lead
- B.
Steel
- C.
Aluminum
- D.
Pyrex glass
Correct Answer
D. Pyrex glassExplanation
The x-ray tube is made of pyrex glass because pyrex glass is a type of borosilicate glass that has excellent thermal and chemical resistance. This makes it ideal for containing the high temperatures and corrosive environments found in an x-ray tube. Additionally, pyrex glass has low thermal expansion, which helps to prevent cracking and ensures the tube's durability.Rate this question:
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- 36.
The x-ray tube protective housing is made of
- A.
Lead
- B.
Steel
- C.
Aluminum
- D.
Pyrex glass
Correct Answer
A. LeadExplanation
The x-ray tube protective housing is made of lead because lead is a dense material that effectively absorbs and blocks radiation. It is commonly used in radiation shielding applications due to its high atomic number and ability to attenuate x-rays. The lead housing helps to protect both the operator and the surrounding environment from unnecessary exposure to radiation.Rate this question:
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- 37.
Which of the following are essential for x-ray production to occur1.source of electron2.target3.high voltage
- A.
1
- B.
1 & 2
- C.
2 & 3
- D.
1, 2, & 3
Correct Answer
D. 1, 2, & 3Explanation
The production of x-rays requires three essential components: a source of electrons, a target, and high voltage. The source of electrons provides the necessary particles for the x-ray production process. The target is the material that the electrons collide with, resulting in the generation of x-rays. Lastly, high voltage is required to accelerate the electrons towards the target with sufficient energy. Therefore, all three components are essential for x-ray production to occur.Rate this question:
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- 38.
The source of electrons in an x-ray tube is the
- A.
Anode
- B.
Target
- C.
Filament
- D.
Focusing cup
Correct Answer
C. FilamentExplanation
The filament is the correct answer because it is responsible for emitting electrons in an x-ray tube. When a high voltage is applied to the filament, it heats up and releases electrons through a process called thermionic emission. These electrons are then accelerated towards the anode, where they interact with the target material to produce x-rays. Therefore, the filament serves as the source of electrons in an x-ray tube.Rate this question:
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- 39.
The target of the x-ray tube is made of
- A.
Tungsten
- B.
Aluminum
- C.
Lead
- D.
Graphite
Correct Answer
A. TungstenExplanation
Tungsten is commonly used as the target material in X-ray tubes because it has a high melting point and can withstand the high temperatures generated during X-ray production. Additionally, tungsten has a high atomic number, which means it is effective at producing X-rays with high energy and penetrating power. This makes tungsten an ideal choice for producing high-quality X-ray images.Rate this question:
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- 40.
The purpose of filtration is to
- A.
Eliminate scatter
- B.
Improve the quality of radiographic images
- C.
Reduce patient does
- D.
All of the above
Correct Answer
C. Reduce patient doesExplanation
Filtration is used in radiography to reduce patient dose by removing low-energy x-rays that are not useful for image formation. These low-energy x-rays contribute to patient dose without adding any valuable information to the image. By reducing patient dose, filtration helps to minimize the potential harmful effects of radiation exposure while still producing high-quality radiographic images. Therefore, the correct answer is to reduce patient dose.Rate this question:
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- 41.
Thermonic emission is a process that provides what for the x-ray exposure
- A.
Exposure time
- B.
Source of electrons
- C.
High voltage
- D.
A target
Correct Answer
B. Source of electronsExplanation
Thermionic emission refers to the process of releasing electrons from a heated material. In the context of x-ray exposure, thermionic emission provides a source of electrons. These electrons are released from a heated filament and accelerated towards a target, creating the x-rays. Therefore, the correct answer is "source of electrons."Rate this question:
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- 42.
The positively charged portion of the x-ray tube is the
- A.
Anode/target
- B.
Cathode
- C.
Filament
- D.
Focusing cup
Correct Answer
A. Anode/targetExplanation
The positively charged portion of the x-ray tube is the anode/target. In an x-ray tube, the anode is the positively charged electrode where the x-rays are produced. When high-speed electrons from the cathode strike the anode, they generate x-rays through the process of bremsstrahlung radiation. The anode is typically made of a tungsten alloy, which has a high melting point and can withstand the high temperatures generated during x-ray production. The target refers to the specific area on the anode where the electrons strike to produce x-rays.Rate this question:
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- 43.
This is referred to as the quantity factor of the x-ray beam
- A.
MAs
- B.
KVp
Correct Answer
A. MAsExplanation
The given answer, mAs, refers to milliampere-seconds, which is a measure of the quantity or amount of x-ray radiation produced. It represents the product of the tube current (measured in milliamperes) and the exposure time (measured in seconds). Increasing the mAs value increases the number of x-ray photons produced, resulting in a higher quantity or intensity of the x-ray beam. Therefore, mAs is considered the quantity factor of the x-ray beam.Rate this question:
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- 44.
This is referred to as the quality factor of the x-ray beam
- A.
MAs
- B.
KVp
Correct Answer
B. KVpExplanation
The quality factor of an x-ray beam refers to the penetrating power or energy level of the beam. The kilovoltage peak (kVp) is a measure of the maximum voltage applied to the x-ray tube during an exposure, which directly affects the energy of the x-ray photons produced. By adjusting the kVp, the radiographer can control the quality or energy level of the x-ray beam. Therefore, the kVp is the correct answer as it directly relates to the quality factor of the x-ray beam.Rate this question:
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- 45.
A dual focus x-ray tube contains two
- A.
Targets
- B.
Filaments
- C.
Anodes
- D.
Cathodes
Correct Answer
B. FilamentsExplanation
A dual focus x-ray tube contains two filaments. Filaments are used to generate electrons that are accelerated towards the anodes. The anodes then produce the x-ray beam. The dual focus design allows for the production of two different focal spots, which can be used for different imaging purposes. This feature is particularly useful in radiography, where different focal spot sizes are needed to capture fine details or larger areas of the body.Rate this question:
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- 46.
Tungsten is used to make x-ray tube components because it has1.a high melting point2.a high atomic number3.it is shiny
- A.
1
- B.
1 & 2
- C.
2 & 3
- D.
All options
Correct Answer
B. 1 & 2Explanation
Tungsten is used to make x-ray tube components because it has a high melting point and a high atomic number. The high melting point of tungsten allows it to withstand the high temperatures generated in the x-ray tube. Additionally, the high atomic number of tungsten makes it an effective material for stopping and absorbing x-ray radiation. The shiny appearance of tungsten is not relevant to its use in x-ray tube components.Rate this question:
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- 47.
How long was wilhems first x-ray exposure
- A.
15 mins
- B.
40 mins
- C.
30 seconds
- D.
60 seconds
Correct Answer
A. 15 minsExplanation
Wilhem's first X-ray exposure lasted for 15 minutes. This duration is significant as it indicates the amount of time he was exposed to X-ray radiation. The length of exposure is an important factor to consider in terms of potential health risks and the effectiveness of the X-ray procedure. It is crucial to limit exposure to X-rays to ensure the safety and well-being of the patient.Rate this question:
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- 48.
What does an image receptor/IR do?
- A.
Filters image
- B.
Receives/records radiation exiting from patient
- C.
Stops radiation
- D.
Nothing
Correct Answer
B. Receives/records radiation exiting from patientExplanation
The image receptor/IR is responsible for receiving and recording the radiation that exits from the patient. It acts as a sensor that captures the image created by the radiation, allowing healthcare professionals to visualize and analyze it. This is an essential function in medical imaging as it enables the diagnosis and treatment of various conditions.Rate this question:
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- 49.
What are the characteristics of an x-ray
- A.
Have no mass
- B.
Travel in curved lines
- C.
Highly penetrating and invisible
- D.
Possess no electrical charge
- E.
Positively charged
- F.
Are heterogeneous (polyenergetic)
- G.
Travel in straight lines at speed of light
- H.
Produce biologic changes in tissues
Correct Answer(s)
A. Have no mass
C. Highly penetrating and invisible
D. Possess no electrical charge
F. Are heterogeneous (polyenergetic)
G. Travel in straight lines at speed of light
H. Produce biologic changes in tissuesExplanation
X-rays have no mass, meaning they do not have any physical weight. They are highly penetrating and invisible, allowing them to pass through many materials without being seen. X-rays also possess no electrical charge, meaning they are neutral particles. They are heterogeneous or polyenergetic, meaning they consist of a range of energies. X-rays travel in straight lines at the speed of light, following a linear path. Lastly, x-rays have the ability to produce biologic changes in tissues, which can be both beneficial for medical imaging purposes but also potentially harmful if not used properly.Rate this question:
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- 50.
X-ray speed/velocity
- A.
3 x 1010 cm/second
- B.
186,000 miles/second
- C.
3 x 108 m/second
- D.
Option 4
Correct Answer(s)
A. 3 x 1010 cm/second
B. 186,000 miles/second
C. 3 x 108 m/secondExplanation
The given answer includes three different units for the speed/velocity of X-rays: centimeters per second, miles per second, and meters per second. These units represent the same value but in different measurement systems. Therefore, all three options are correct.Rate this question:
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