Principles of Radiographic Imaging Exam Practice Tests
Course
Introduction
Principles of Radiographic Imaging provides an in-depth exploration of the foundational concepts, techniques, and technologies used in the production of radiographic images. This course covers the physics of x-ray generation, the interaction of radiation with matter, image receptor systems, and the factors that influence image quality such as exposure, contrast, and spatial resolution. Students will also examine radiation protection protocols, quality assurance procedures, and the ethical considerations associated with radiographic imaging. Practical applications and case studies are integrated to enhance understanding and prepare students for clinical practice in medical imaging environments.
Recommended Textbook
Essentials of Radiographic Physics and Imaging 1st Edition by James Johnston
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16 Chapters
1558 Verified Questions
1558 Flashcards
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Chapter 1: Introduction to the Imaging Sciences
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Sample Questions
Q1) In the British system the unit of measure for length is:
A) meter
B) kilometer
C) foot
D) mile
Answer: C
Q2) How much force is needed to move a 30-kg piece of equipment at a rate of 3 m/s²?
A) 10 N
B) 30 N
C) 60 N
D) 90 N
Answer: D
Q3) The positive electrode of the x-ray tube is the:
A) diode
B) cathode
C) anode
D) canode
Answer: C
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Chapter 2: Structure of the Atom
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Sample Questions
Q1) Two or more atoms that bond together form a(n):
A) atomic number
B) atomic mass number
C) element
D) compound
Answer: D
Q2) The mass of an atom is primarily due to the mass of the:
A) neutrons
B) nucleus
C) electrons
D) protons
Answer: B
Q3) The number of protons in an atom's nucleus is reflected in its:
A) atomic number
B) atomic mass number
C) element
D) compound
Answer: A
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Chapter 3: Electromagnetic and Particulate Radiation
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Sample Questions
Q1) An object we see as black is _______________ all of the wavelengths of visible light.
A) absorbing
B) diffusing
C) reflecting
D) changing
Answer: A
Q2) X-rays are produced:
A) from unstable atoms
B) using fast-moving electrons
C) using fast-moving atoms
D) using fast-moving metals
Answer: B
Q3) When considering the wave properties of electromagnetic radiation,the distance from the peak of one wave to the next is:
A) wavelength
B) amplitude
C) frequency
D) velocity
Answer: A
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Chapter 4: X-Ray Circuit
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Sample Questions
Q1) Three-phase power:
A) uses three AC.waveforms at the same time
B) results in three times the ripple
C) is half-wave rectified
D) A and B
Q2) Place the following events leading to the production of x-rays in order,from first to last:
I.resistance is adjusted at the rheostat
II.filament is heated
III.filament current is increased
IV.electrons are boiled off filament
A) II,IV,III,I
B) III,II,IV,I
C) I,III,II,IV
D) I,IV,III,II
Q3) If a conductor is curved,the greatest amount of charge will be found:
A) at the beginning of the conductor
B) at the end of the conductor
C) at the area of the greatest curvature of the conductor
D) along the straightest area of the conductor
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Chapter 5: The X-Ray Tube
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Sample Questions
Q1) An x-ray tube with two filaments is called a:
A) two-focus tube
B) dual-focus tube
C) trifocal tube
D) highly specialized tube
Q2) For the covering of the rotating anode disc,_____________ may be added to tungsten to increase thermal capacity.
A) molybdenum
B) rhenium
C) copper
D) none of the above
Q3) To take advantage of the anode heel effect,the thicker part of the anatomy being imaged should be placed under the anode end of the tube.
A)True
B)False
Q4) Using very long exposures can lead to tube damage or failure.
A)True
B)False
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Chapter 6: X-Ray Production
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Sample Questions
Q1) It is recommended that kVp not be used to control beam quantity because:
A) it affects scatter production
B) it affects penetrability of the beam
C) it is less predictable in how changing the kVp affects the image
D) all of the above
Q2) The average energy of a brems photon is ______ of the kVp selected.
A) 1/3
B) 1/2
C) 2/3
D) the same as that
Q3) With a 75-kVp exposure,the energy of the photons displayed on the continuous emission spectrum can range from just above 0 to:
A) 25 keV
B) 50 keV
C) 75 keV
D) 150 keV
Q4) A 65-keV filament electron is not able to produce characteristic radiation.
A)True
B)False
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Chapter 7: X-Ray Interactions With Matter
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Sample Questions
Q1) During a photoelectric interaction,
A) an inner-shell electron is ejected
B) an outer-shell electron is ejected
C) no electrons are ejected
D) electrons for all levels are ejected
Q2) As a result of pair production,a(n)______________ and a(n)______________ are produced.
A) electron;positron
B) electron;proton
C) proton;neutron
D) neutron;electron
Q3) The probability of a photoelectric interaction depends on the energy level of the incident x-ray photon.
A)True
B)False
Q4) Excessive absorption is the result of:
A) using a mAs that is too low for the examination
B) using a kVp that is too low for the examination
C) using a kVp that is too high for the examination
D) all of the above
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Chapter 8: Image Production
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Sample Questions
Q1) Transmission refers to:
A) all x-rays in the beam before entering the patient
B) x-rays leaving the patient that did not interact with atoms
C) all x-rays leaving the patient
D) the process of sending the x-ray beam through the patient
Q2) Decreased attenuation results in:
A) more x-ray photons reaching the image receptor
B) fewer x-ray photons reaching the image receptor
C) no change in the number of photons reaching the image receptor
D) none of the above
Q3) A high-energy beam results in
A) increased attenuation
B) decreased attenuation
C) no change in attenuation
Q4) In the image intensifier,the photocathode:
A) converts remnant radiation to light
B) focuses the electrons
C) converts light to electrons
D) absorbs the energized electrons and produces a brighter image
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Chapter 9: Image Characteristics
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Sample Questions
Q1) A wide-latitude film has:
A) higher contrast
B) lower contrast
C) a steeper slope
D) B and C
Q2) Quantum noise is a result of:
A) too few x-ray photons reaching the image receptor
B) too many x-ray photons reaching the image receptor
C) x-rays with energy that is too high reaching the image receptor
D) A and C
Q3) Size distortion is also called:
A) elongation
B) magnification
C) shape distortion
D) foreshortening
Q4) If 1000 light photons enter the film and 500 exit,what is the optical density?
A) 0.02
B) 0.3
C) 2
D) 50
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Chapter 10: Radiographic Exposure Technique
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Sample Questions
Q1) Which of the following has an effect on how much mAs is used for a specific examination?
A) generator type
B) pathologic conditions present
C) type of image receptor
D) all of the above
Q2) To visualize soft tissue structures with digital imaging,the standard exposure factors should be:
A) increased
B) decreased
C) left the same
D) doubled
Q3) If a film image is too light to visualize the anatomy being imaged:
A) the optical densities are in the toe region of the sensitometric curve
B) the optical densities are in the straight-line region of the sensitometric curve
C) the optical densities are in the shoulder region of the sensitometric curve
D) none of the above
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12
Chapter 11: Scatter Control
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Sample Questions
Q1) A short-dimension grid:
A) is typically used for most examinations
B) has lead strips running perpendicular to the long axis of the grid
C) has lead strips running parallel to the long axis of the grid
D) A and B
Q2) The purpose of automatic collimation is:
A) improved image quality
B) limiting patient exposure
C) increasing the cost of equipment
D) none of the above
Q3) Anyone in the room during an exposure must wear a lead apron to absorb the scatter radiation produced in the:
A) table
B) patient
C) air
D) beam
Q4) Beam-restricting devices are located just above the tube housing.
A)True
B)False
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Chapter 12: Image Receptors
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Sample Questions
Q1) One half of the Nyquist frequency is equal to:
A) the spatial resolution of a digital system
B) the contrast resolution of a digital system
C) the amount of noise in a digital system
D) none of the above
Q2) This storage includes removable tape or optical media that are retrieved manually.
A) online storage
B) offline storage
C) nearline storage
Q3) With digital imaging,it is all right to overexpose the patient by using a higher mAs than necessary because then images do not have to be repeated.
A)True
B)False
Q4) Intensifying screens do not need cleaning because they never get exposed to dust or dirt.
A)True
B)False
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Chapter 13: Automatic Exposure Control
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Sample Questions
Q1) With digital imaging using AEC,if an AP thoracic spine is imaged with the density setting changed from 0 to -2,the brightness in the area of interest is __________________ and the ____________ is increased.(Assume all other factors are appropriate. )
A) decreased;exposure time
B) increased;image contrast
C) appropriate;recorded detail
D) appropriate;quantum noise
Q2) Using a higher kVp during an AEC examination results in:
A) a longer exposure time
B) a shorter exposure time
C) increased patient exposure
D) B and C
Q3) When using AEC,the radiographer is responsible for determining:
A) kVp
B) mAs
C) exposure time
D) none of the above
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Chapter 14: Image Intensified Fluoroscopy
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Sample Questions
Q1) The diameter of the output phosphor is approximately:
A) 1 cm
B) 2.5 cm
C) 5 cm
D) 25 cm
Q2) The electron gun in the television monitor sends out a steady stream of electrons to activate the fluorescent screen.
A)True
B)False
Q3) The formula for minification gain is:
A) minification gain = input phosphor diameter / output phosphor diameter
B) minification gain = input phosphor diameter² / output phosphor diameter²
C) minification gain = output phosphor diameter / input phosphor diameter
D) minification gain = output phosphor diameter² / input phosphor diameter²
Q4) Which of the following accurately shows the energy sequence during fluoroscopy?
A) light to x-rays to electrons to light
B) x-rays to light to electrons to light
C) x-rays to electrons to light
D) electrons to light to electrons
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Chapter 15: Additional Equipment
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Sample Questions
Q1) Breast compression:
A) improves image contrast
B) improves spatial resolution
C) reduces magnification
D) all of the above
Q2) The goal of linear tomography is to:
A) sharpen the anatomic structures above and below the level of interest
B) sharpen the anatomic structures within the level of interest
C) blur the anatomic structures above and below the level of interest
D) blur the anatomic structures within the level of interest
Q3) This type of dedicated unit is typically used to image the mandible and teeth.
A) chest
B) panorex
C) mammography
D) bone densitometry
Q4) A common site for mobile fluoroscopy is:
A) in the patient's room
B) in the radiology department
C) in nursing home
D) in the operating room
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Chapter 16: Computed Tomography
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Sample Questions
Q1) The result of changing window level and width of the CT image is that the image data has been permanently changed.
A)True
B)False
Q2) The high-frequency generator used in CT scanning has minimal voltage ripple,allowing:
A) higher kVp to be used
B) higher mA to be used
C) longer exposures
D) more consistent energy x-ray photons
Q3) Automatic tube current modulation is a method:
A) to reduce patient exposure
B) to improve image quality
C) similar to automatic exposure control
D) A and C
Q4) As the WW changes,the CT image's:
A) contrast changes
B) brightness changes
C) spatial resolution changes
D) none of the above
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