Radiographic Imaging Pre-Test Questions
Course Introduction
Radiographic Imaging is a comprehensive course designed to introduce students to the fundamental principles and techniques of diagnostic radiography. The course covers topics such as the production and properties of X-rays, image formation, radiographic equipment, and safety protocols for both patients and operators. Students will learn about image quality factors, digital imaging advancements, and the application of various imaging modalities in clinical practice. Emphasis is placed on understanding exposure parameters, image evaluation, and the importance of proper positioning techniques to ensure optimal diagnostic outcomes while minimizing radiation dose.
Recommended Textbook Essentials of Radiographic Physics and Imaging 1st Edition by James Johnston
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Chapter 1: Introduction to the Imaging Sciences
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Sample Questions
Q1) The metric system is also known as the:
A) British system
B) System International (SI)
C) System of Units (SU)
D) French system
Answer: B
Q2) The formula mv (mass × velocity)is used to determine:
A) power
B) force
C) work
D) momentum
Answer: D
Q3) Barium platinocyanide was the material in Dr.Roentgen's laboratory that:
A) covered the cathode ray tube
B) fluoresced when the cathode ray tube was energized
C) was used to produce the radiograph of Bertha Roentgen's hand
D) protected the people in the room from the x-rays
Answer: B
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3
Chapter 2: Structure of the Atom
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Sample Questions
Q1) The atomic nucleus contains:
A) protons and neutrons
B) protons and electrons
C) electrons and neutrons
D) all of the above
Answer: A
Q2) The electron binding energy depends on:
A) how close it is to the nucleus
B) how many neutrons there are in the nucleus
C) how many protons there are in the nucleus
D) A and C
Answer: D
Q3) Electron shells are the hard coating around the electron.
A)True
B)False
Answer: False
Q4) Each element has an unchanging number of protons.
A)True
B)False
Answer: True
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Chapter 3: Electromagnetic and Particulate Radiation
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Sample Questions
Q1) When considering the wave properties of electromagnetic radiation,the number of waves that pass by a given point in 1 second is:
A) wavelength
B) amplitude
C) frequency
D) velocity
Answer: C
Q2) Different electromagnetic radiations are put in order by the:
A) electromagnetic table
B) electromagnetic spectrum
C) electromagnetic chart
D) electromagnetic list
Answer: B
Q3) Half-life is:
A) the rate at which a radioactive material decays
B) half the time it takes for all the radioactivity to decay
C) the rate at which particulate radiation is emitted from a radioactive atom's nucleus
D) none of the above
Answer: A
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Page 5
Chapter 4: X-Ray Circuit
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Sample Questions
Q1) The unit of measurement of electrical charges (SI)is:
A) watt
B) joule
C) newton
D) coulomb
Q2) Determining which filament will be used during an exposure is done at the operating console by the selection of:
A) small or large focal spot
B) small or large filament
C) high or low exposure time
D) high or low kVp
Q3) Magnetic field strength is measured in:
A) tesla
B) ohms
C) newtons
D) joules
Q4) To produce x-rays,a cloud of electrons are necessary and the cathode must have a strong positive charge.
A)True
B)False
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Chapter 5: The X-Ray Tube
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Sample Questions
Q1) There is a small amount of ______________ added to the filament to increase thermionic emission.
A) thorium
B) rhenium
C) tungsten
D) copper
Q2) The relationship between the actual focal spot size,effective focal spot size,and anode target angle is called:
A) the anode heel effect
B) the line-focus principle
C) Roentgen's principle
D) all of the above
Q3) Copper is used in the rotating anode because:
A) it is an excellent conductor
B) it is an excellent insulator
C) it has a high atomic number
D) it has a low atomic number
Q4) When the electrons strike the anode target,they all produce x-rays.
A)True
B)False
Page 7
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Chapter 6: X-Ray Production
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Sample Questions
Q1) A 65-keV filament electron is not able to produce characteristic radiation.
A)True
B)False
Q2) Changing from a high-frequency generator to a single-phase generator results in the x-ray emission spectrum:
A) changing along the x-axis
B) changing along the y-axis
C) both of the above
D) neither of the above
Q3) If kVp is doubled,the quantity of radiation increases by a factor of:
A) 2
B) 3
C) 4
D) 8
Q4) If a filament electron enters the tungsten atom with 80 keV of energy and leaves the atom with 75 keV of energy:
A) the brems photon will be 75 keV
B) the brems photon will be 80 keV
C) the filament electron traveled very close to the nucleus
D) the filament electron traveled very far from the nucleus
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Chapter 7: X-Ray Interactions With Matter
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Sample Questions
Q1) All Compton scatter photons travel in the direction of the image receptor.
A)True
B)False
Q2) Photodisintegration occurs when the incident photon interacts with:
A) an inner-shell electron
B) an outer-shell electron
C) inner- and outer-shell electrons
D) the nucleus of the atom
Q3) Protective apparel is often made of lead because it:
A) is very heavy
B) can be made very thick
C) is inexpensive
D) has a high atomic number
Q4) The probability of a photoelectric interaction depends on the energy level of the incident x-ray photon.
A)True
B)False
Q5) Without differential absorption,the image would be a single shade of gray.
A)True
B)False
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Chapter 8: Image Production
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Sample Questions
Q1) Fluoroscopy produces:
A) static imaging
B) dynamic imaging
C) still imaging
D) none of the above
Q2) Less than _________ of the primary beam entering the part reaches the image receptor.
A) 1%
B) 5%
C) 18%
D) 99%
Q3) The image from the output phosphor of the image intensifier is displayed on a television monitor.
A)True
B)False
Q4) Scatter radiation may:
A) expose people near the patient
B) increase patient exposure
C) contributes no useful information if it strikes the image receptor
D) all of the above
10
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Chapter 9: Image Characteristics
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Sample Questions
Q1) Which of the following systems has the largest dynamic range?
A) slow-speed film-screen imaging
B) low-contrast film-screen imaging
C) high-speed film-screen imaging
D) digital imaging
Q2) The average gradient is used to determine the film's:
A) speed
B) exposure
C) contrast
D) optical density
Q3) Characteristic and H&D are other terms for sensitometric curves.
A)True
B)False
Q4) Film is able to produce optical densities between:
A) 0.0 and 2 OD
B) 0.0 and 3 OD
C) 0.0 and 4 OD
D) 0.0 and 5 OD
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11
Chapter 10: Radiographic Exposure Technique
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Sample Questions
Q1) Casts made of plaster require _________________ of exposure factors as compared with not having a cast.
A) an increase
B) a decrease
C) no change
D) halving
Q2) Barium sulfate is considered a:
A) positive contrast agent
B) neutral contrast agent
C) negative contrast agent
D) B and C
Q3) Pediatric chest imaging requires:
A) high mAs
B) high kVp
C) long exposure times
D) short exposure times
Q4) As the SID increases,the x-ray photons in the beam become less perpendicular to the object being imaged.
A)True
B)False
Page 12
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Chapter 11: Scatter Control
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Sample Questions
Q1) For radiographic procedures,scatter radiation is primarily the result of:
A) photoelectric interaction
B) pair production
C) Compton interaction
D) classical scattering
Q2) If 24 mAs and a 6:1 grid results in an excellent radiograph,how much mAs is needed with a 5:1 grid?
A) 16 mAs
B) 20 mAs
C) 28.8 mAs
D) 36 mAs
Q3) The formula for the grid conversion factor is:
A) GCF = mAs without grid / mAs with grid
B) GCF = mAs with grid - mAs without grid
C) GCF = mAs with grid / mAs without grid
D) GCF = mAs without grid - mAs with grid
Q4) The grid limits the amount of scatter radiation produced in the patient.
A)True
B)False
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Chapter 12: Image Receptors
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Sample Questions
Q1) Electronically sending radiologic images over a distance is:
A) PACS
B) DICOM
C) teleradiology
D) RIS
Q2) The matching of kVp to the subject and receptor is less critical with digital systems as compared with film-screen.
A)True
B)False
Q3) The _____________ the screen speed,the __________________ the recorded detail.
A) faster;better
B) faster;worse
C) slower;better
D) B and C
Q4) The developer solution:
A) is acidic
B) is alkaline
C) removes silver halide from the film
D) none of the above
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Chapter 13: Automatic Exposure Control
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Sample Questions
Q1) In imaging a child,a short exposure time is needed for an examination using AEC.The mA setting should:
A) be low
B) be mid-range
C) be high
D) it doesn't matter-the AEC device will control the exposure time
Q2) Using a lower mA station during an AEC examination results in:
A) reduced patient exposure
B) increased exposure time
C) decreased exposure time
D) A and B
Q3) Testing to make sure the AEC system produces the same results for multiple identical exposures is checking for ______________ and the optical densities should be within +/- ______________.
A) reproducibility;0.1
B) calibration;2
C) consistency;0.2
D) none of the above
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Chapter 14: Image Intensified Fluoroscopy
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Sample Questions
Q1) Photoemission occurs at the:
A) input phosphor
B) output phosphor
C) photocathode
D) accelerating anode
Q2) The image intensifier was introduced in the:
A) 1920s
B) 1950s
C) 1970s
D) 1980s
Q3) The gain related to the decrease in size from the input to the output phosphor is the:
A) brightness gain
B) flux gain
C) minification gain
D) conversion factor
Q4) Which of the following has more spatial distortion?
A) video camera
B) CCD
C) there is no difference between the two
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Chapter 15: Additional Equipment
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Sample Questions
Q1) The arc created when the x-ray beam is on during tomography is the:
A) tomographic amplitude
B) exposure amplitude
C) fulcrum
D) focal plane
Q2) In that the exposure time for a linear tomographic image is long,the mA must be:
A) low
B) mid-range
C) high
D) it depends on the mAs
Q3) The focal spot size of a dedicated mammography unit is _________ than that of a standard x-ray tube,measuring __________________.
A) smaller;0.1-0.3 mm
B) smaller;1-3 mm
C) larger;0.1-0.3 mm
D) larger;1-3 mm
Q4) A dedicated chest room allows the radiographer to stay in the room while the images are being processed.
A)True
B)False
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Chapter 16: Computed Tomography
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Sample Questions
Q1) This CT scanner took approximately 5 minutes to produce a single image.
A) first generation
B) second generation
C) third generation
D) fourth generation
Q2) 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
Q3) This refers to all the settings that must be determined for a CT imaging study.
A) protocol
B) SFOV
C) DFOV
D) pitch
Q4) This is the only generation of CT scanners that used parallel beam geometry.
A) first generation
B) second generation
C) third generation
D) fourth generation
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