Radiation Science Exam Solutions
Course Introduction
Radiation Science is an interdisciplinary course that explores the fundamental principles, sources, and applications of radiation in various scientific and technological fields. Students will examine the nature and types of radiation, including ionizing and non-ionizing forms, and their interactions with matter. The course covers topics such as radioactive decay, dosimetry, biological effects of radiation, detection and measurement techniques, and their significance in medical imaging, cancer therapy, nuclear energy, and environmental monitoring. Emphasis is placed on safety, regulatory standards, and the ethical considerations associated with the use of radiation in society.
Recommended Textbook
Essentials of Radiographic Physics and Imaging 1st Edition by James Johnston
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16 Chapters
1558 Verified Questions
1558 Flashcards
Source URL: https://quizplus.com/study-set/1323 Page 2
Chapter 1: Introduction to the Imaging Sciences
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75 Verified Questions
75 Flashcards
Source URL: https://quizplus.com/quiz/26365
Sample Questions
Q1) If it takes 2 minutes to perform 360 J of work,what is the power?
A) 3 W
B) 9 W
C) 180 W
D) 720 W
Answer: A
Q2) The radiologic unit that addresses the different biological effects of different types of ionizing radiation is the:
A) rad
B) roentgen
C) sievert
D) gray
Answer: C
Q3) What is the velocity of a javelin that travels 45 meters in 3 seconds?
A) 0.067 m/s
B) 15 m/s
C) 67 m/s
D) 135 m/s
Answer: B
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Page 3
Chapter 2: Structure of the Atom
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63 Verified Questions
63 Flashcards
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Sample Questions
Q1) If an atom has more protons than electrons it will:
A) have a negative charge
B) have a positive charge
C) be electrically neutral
D) have neither a positive not negative charge
Answer: B
Q2) Discovery of the electron is attributed to:
A) Dalton
B) Bohr
C) Thomson
D) Rutherford
Answer: C
Q3) The earliest atomic theory based on the arrangement of the solar system is attributed to:
A) Bohr
B) Rutherford
C) Dalton
D) Thomson
Answer: B
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Page 4
Chapter 3: Electromagnetic and Particulate Radiation
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58 Verified Questions
58 Flashcards
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Sample Questions
Q1) Gamma rays are produced:
A) from unstable atoms
B) using fast-moving electrons
C) using fast-moving atoms
D) using fast-moving metals
Answer: A
Q2) An object we see as white is _______________ all of the wavelengths of visible light.
A) absorbing
B) diffusing
C) reflecting D) changing
Answer: C
Q3) The formula E = hf demonstrates that:
A) as frequency increases,energy decreases
B) as frequency increases,energy increases
C) as energy increases,heat decreases
D) as energy increases,heat increases
Answer: B
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Page 5
Chapter 4: X-Ray Circuit
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147 Verified Questions
147 Flashcards
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Sample Questions
Q1) The timer circuit is found on the:
A) primary circuit
B) secondary circuit
C) filament circuit
D) none of the above
Q2) The idea that electricity could be induced in a wire by moving it through a magnetic field was discovered by:
A) Faraday
B) Roentgen
C) Tesla
D) Oersted
Q3) Single-phase full-wave rectified current has:
A) 10% ripple
B) 25% ripple
C) 50% ripple
D) 100% ripple
Q4) Increasing the strength of the magnetic field results in:
A) increased electromagnetic induction
B) reduced electromagnetic induction
C) no effect on electromagnetic induction
Page 6
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Chapter 5: The X-Ray Tube
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108 Verified Questions
108 Flashcards
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Sample Questions
Q1) Thermionic emission is:
A) heating the filament
B) heating the filament until electrons are boiled off
C) using the focusing cup to create a space charge
D) the space charge that travels from cathode to anode
Q2) By regulation,x-ray tube leakage radiation can be no more than:
A) 100 R per hour
B) 100 R per minute
C) 100 mR per hour
D) 100 mR per minute
Q3) Which of the following practices extend tube life?
A) press the prep and exposure switches at almost the same time
B) warm up the tube just before turning the equipment off
C) use high exposures
D) none of the above
Q4) Which of the following practices extend tube life?
A) warm up the tube as appropriate
B) press the prep and exposure switches at almost the same time
C) avoid using very high exposures or long exposure times
D) all of the above
7
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Chapter 6: X-Ray Production
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68 Verified Questions
68 Flashcards
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Sample Questions
Q1) A higher energy beam is said to be:
A) soft
B) hard
C) weak
D) powerful
Q2) To double the beam quantity:
A) halve the mAs
B) leave the mAs as is and reduce the kVp
C) double the mAs
D) increase the mAs by a factor of 4 (2²)
Q3) A 65-keV filament electron is not able to produce characteristic radiation.
A)True
B)False
Q4) The process of a series of outer-shell electrons filling inner-shell vacancies right after the other is called:
A) characteristic tumble
B) characteristic x-rays
C) characteristic sequence
D) characteristic cascade
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Chapter 7: X-Ray Interactions With Matter
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63 Verified Questions
63 Flashcards
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Sample Questions
Q1) When it does interact with the image receptor,the Compton scatter photon contributes no useful information because:
A) its energy is too low
B) its energy is too high
C) it has changed direction
D) none of the above
Q2) The major source of radiation exposure to technologists is due to:
A) coherent scattering
B) classical scattering
C) photoelectric interactions
D) Compton interactions
Q3) Photodisintegration interactions:
A) occur very often during radiographic procedures
B) seldom occur during radiographic procedures
C) never occur during radiographic procedures
D) it depends on the procedure
Q4) The probability of a photoelectric interaction depends on the atomic number of the atom.
A)True
B)False
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Chapter 8: Image Production
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66 Verified Questions
66 Flashcards
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Sample Questions
Q1) After the x-ray beam enters the patient and has many photoelectric interactions,the quantity of the beam increases.
A)True
B)False
Q2) Less than _________ of the primary beam entering the part reaches the image receptor.
A) 1%
B) 5%
C) 18%
D) 99%
Q3) Complete absorption of the diagnostic range x-ray photon is the interaction known as:
A) Compton scattering
B) photoelectric interaction
C) classical scattering
D) photodisintegration
Q4) Imaging tissues with lower atomic numbers results in:
A) increased attenuation
B) decreased attenuation
C) no change in attenuation
Page 10
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Chapter 9: Image Characteristics
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161 Verified Questions
161 Flashcards
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Sample Questions
Q1) Making the digital image appear with high contrast,more black and white,is done by:
A) raising the window level
B) lowering the window level
C) increasing the window width
D) decreasing the window width
Q2) The average gradient is used to determine the film's:
A) speed
B) exposure
C) contrast
D) optical density
Q3) A wide-latitude film has:
A) higher contrast
B) lower contrast
C) a steeper slope
D) B and C
Q4) Artifacts can make diagnosis of pathologic conditions difficult or impossible.
A)True
B)False
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Chapter 10: Radiographic Exposure Technique
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163 Verified Questions
163 Flashcards
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Sample Questions
Q1) Imaging a thicker body part will result in a film image with:
A) lower contrast and less density
B) lower contrast and more density
C) higher contrast and less density
D) higher contrast and more density
Q2) Which of the following statements is true regarding practices to minimize patient exposure?
A) The beam should be open as large as the image receptor being used.
B) Grids should be used as much as possible to improve contrast.
C) Film-screen speed selection should balance exposure and the level of recorded detail needed for the examination
D) none of the above
Q3) Because the technique chart determines image quality,there is no need to establish department standards for image quality prior to creating a technique chart.
A)True
B)False
Q4) A magnification of factor of 1 cannot be achieved with radiographic imaging.
A)True
B)False
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Chapter 11: Scatter Control
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80 Verified Questions
80 Flashcards
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Sample Questions
Q1) As compared with lower kVp exposures,when using high kVp the energy of the scattered photon is:
A) lower
B) higher
C) the same
D) half
Q2) The recommended SIDs that can be used with a focused grid is the:
A) convergent line
B) focal distance
C) convergent point
D) focal range
Q3) If a tabletop exposure (no grid)of a humerus requires 2.5 mAs,how much mAs is needed if a 12:1 ratio grid is added?
A) 0.21 mAs
B) 0.5 mAs
C) 12.5 mAs
D) 30 mAs
Q4) The grid limits the amount of scatter radiation produced in the patient.
A)True
B)False
Page 13
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Chapter 12: Image Receptors
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167 Verified Questions
167 Flashcards
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Sample Questions
Q1) The color of light produced by an intensifying screen is the:
A) spectral matching
B) spectral sensitivity
C) spectral emission
D) B and C
Q2) _______________ system is used in the developer and fixer tanks to keep the chemicals mixed and moving.
A) recirculation
B) the feed tray
C) the standby control
D) replenishment
Q3) Film-screen imaging typically uses __________ film with ___________ intensifying screen(s).
A) single-emulsion;one
B) single-emulsion;two
C) double-emulsion;one
D) double-emulsion;two
Q4) With digital imaging,mAs does not control image brightness.
A)True
B)False
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Chapter 13: Automatic Exposure Control
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60 Verified Questions
60 Flashcards
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Sample Questions
Q1) AEC controls the amount of radiation reaching the IR by controlling the:
A) time of exposure
B) mA
C) kVp
D) none of the above
Q2) When there is a significant amount of scatter radiation reaching the detector,the exposure time will:
A) be shorter than needed
B) be appropriate
C) be longer than needed
Q3) If the patient for an AP thoracic spine image is centered so that the spine is not over the top of the detector:
A) the film image will be too dark
B) the film image will be too light
C) the IR will be overexposed
D) A and C
Q4) AED and phototiming are accurate terms that can be used in place of automatic exposure control.
A)True
B)False
Page 15
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Chapter 14: Image Intensified Fluoroscopy
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100 Verified Questions
100 Flashcards
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Sample Questions
Q1) Which of the following require the x-ray beam to be in radiographic mode?
A) cassette spot filming
B) film cameras for spot filming
C) videotape
D) none of the above
Q2) Typical fluoroscopic systems have spatial resolution capabilities in the range of:
A) 2-3 Lp/mm
B) 4-6 Lp/mm
C) 7-9 Lp/mm
D) 10-12 Lp/mm
Q3) Inspection of the monitor brightness and exposure switch are parts of:
A) performance quality control testing
B) operational quality control testing
C) A and B
D) none of the above
Q4) The beam-splitting mirror is never used with fiberoptics.
A)True
B)False
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Page 16
Chapter 15: Additional Equipment
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54 Verified Questions
54 Flashcards
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Sample Questions
Q1) The arc created by the total movement of the tube during tomography is the:
A) tomographic amplitude
B) exposure amplitude
C) fulcrum
D) focal plane
Q2) The image of a mandible taken with a panorex unit and one taken with standard radiographic equipment have very similar appearances.
A)True
B)False
Q3) During linear tomography,the tube and image receptor:
A) move in the same direction along a straight line
B) move in opposite directions along a straight line
C) move in the same direction along a circular path
D) move in opposite directions along a circular path
Q4) To produce a thin tomographic section,there needs to be a:
A) low fulcrum level
B) high fulcrum level
C) small tomographic angle
D) large tomographic angle
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Chapter 16: Computed Tomography
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125 Verified Questions
125 Flashcards
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Sample Questions
Q1) Slices of anatomy that go from front to back are:
A) coronal
B) sagittal
C) axial
Q2) A pitch of 0.5 indicates that with each rotation of the tube:
A) the table is moving farther than the slice thickness
B) the table is moving less than the slice thickness
C) the table is moving the same distance as the slice thickness
D) none of the above
Q3) DAS stands for:
A) digital absorption system
B) data acquisition system
C) diode acquisition system
D) data absorption system
Q4) This specific area of the image is often selected to perform data analysis.
A) annotation
B) windowing
C) ROI
D) MPR
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