Radiographic Physics Test
Questions
Course Introduction
Radiographic Physics is a foundational course that explores the principles of physics as they apply to medical imaging. This course covers the nature and properties of x-rays, the production of radiation, interactions of radiation with matter, image formation, and the fundamentals of radiographic equipment. Students will gain an understanding of the factors that affect image quality, radiation safety, exposure techniques, and the physical principles underlying advanced imaging modalities. Emphasis is placed on building a solid conceptual framework to support safe and effective use of radiographic technology in clinical practice.
Recommended Textbook
Essentials of Radiographic Physics and Imaging 2nd Edition by James Johnston
Available Study Resources on Quizplus
16 Chapters
1530 Verified Questions
1530 Flashcards
Source URL: https://quizplus.com/study-set/1322
Page 2
Chapter 1: Introduction to the Imaging Sciences
Available Study Resources on Quizplus for this Chatper
76 Verified Questions
76 Flashcards
Source URL: https://quizplus.com/quiz/26349
Sample Questions
Q1) The principle of inertia was first described by
A)Wilhelm Conrad Roentgen
B)Sir Isaac Newton
C)Thomas Alva Edison
D)Crookes
Answer: B
Q2) In the SI system the unit of measure for mass is
A)pound
B)gram
C)kilogram
D)ton
Answer: C
Q3) Velocity,acceleration,and work are
A)fundamental quantities
B)derived quantities
C)radiologic quantities
D)none of the above
Answer: B
To view all questions and flashcards with answers, click on the resource link above. Page 3
Chapter 2: Structure of the Atom
Available Study Resources on Quizplus for this Chatper
63 Verified Questions
63 Flashcards
Source URL: https://quizplus.com/quiz/26350
Sample Questions
Q1) The electrons stay in orbit around the nucleus because of
A)their attraction to the protons
B)their attraction to the neutrons
C)their attraction to the other electrons
D)all of the above
Answer: A
Q2) If an atom has the same number of electrons and protons it will
A)have a negative charge
B)have a positive charge
C)be electrically neutral
D)none of the above
Answer: C
Q3) Atoms with different number of protons but the same combined number of protons and neutrons are
A)isotopes
B)isotones
C)isobars
D)isomers
Answer: C
To view all questions and flashcards with answers, click on the resource link above.
Page 4
Chapter 3: Electromagnetic and Particulate Radiation
Available Study Resources on Quizplus for this Chatper
58 Verified Questions
58 Flashcards
Source URL: https://quizplus.com/quiz/26351
Sample Questions
Q1) Frequency is typically measured in
A)hertz
B)feet
C)centimeters
D)meters
Answer: B
Q2) The positively charged beta particle is a(n)
A)electron
B)alpha particle
C)negatron
D)positron
Answer: D
Q3) The formula v = fl can be used to calculate the ______________ and ____________ of an electromagnetic wave.
A)velocity;wavelength
B)wavelength;frequency
C)frequency;velocity
D)all of the above
Answer: B
To view all questions and flashcards with answers, click on the resource link above.
Page 5
Chapter 4: The X-Ray Circuit
Available Study Resources on Quizplus for this Chatper
152 Verified Questions
152 Flashcards
Source URL: https://quizplus.com/quiz/26352
Sample Questions
Q1) Single-phase full-wave rectified current has
A)10% ripple
B)25% ripple
C)50% ripple
D)100% ripple
Q2) How much current is needed to heat the filament enough to produce a 100-1000 mA tube current?
A)1 A to 10 a.
B)5 A to 7 A.
C)1 mA to 10 mA.
D)5 mA to 7 mA.
Q3) Only electrons are free to move in solid conductors.
A)True
B)False
Q4) The line compensator is typically wired to the A)timer circuit
B)primary side of the high-voltage transformer
C)autotransformer
D)step-down transformer
To view all questions and flashcards with answers, click on the resource link above. Page 6
Chapter 5: The X-Ray Tube
Available Study Resources on Quizplus for this Chatper
110 Verified Questions
110 Flashcards
Source URL: https://quizplus.com/quiz/26353
Sample Questions
Q1) The negative end of the x-ray tube is the
A)anode
B)cathode
C)target
D)envelope
Q2) Each cathode filament is approximately
A)1-3 mm long
B)5-6 mm long
C)7-15 mm long
D)20-35 mm long
Q3) To allow x-rays to leave the tube,the glass or metal enclosure in the area of the target window is
A)removed
B)made thicker than the rest of the enclosure
C)made thinner than the rest of the enclosure
D)hinged to allow the window to open
Q4) In addition to the oil surrounding the tube,mechanical fans help to eliminate the heat produced during x-ray production.
A)True
B)False
To view all questions and flashcards with answers, click on the resource link above. Page 7
Chapter 6: X-Ray Production
Available Study Resources on Quizplus for this Chatper
72 Verified Questions
72 Flashcards
Source URL: https://quizplus.com/quiz/26354
Sample Questions
Q1) With the x-ray emission spectrum,the discrete line is the highest energy ___________________ bar.
A)J-characteristic
B)K-characteristic
C)L-characteristic
D)M-characteristic
Q2) Which of the following results in the equivalent of doubling the mAs if the original kVp is 80?
A)85 kVp.
B)92 kVp.
C)120 kVp.
D)160 kVp.
Q3) If kVp is doubled,the quantity of radiation increases by a factor of A)2
B)3
C)4
D)8
Q4) A 65-keV filament electron is not able to produce characteristic radiation. A)True
B)False
To view all questions and flashcards with answers, click on the resource link above. Page 8
Chapter 7: X-Ray Interactions With Matter
Available Study Resources on Quizplus for this Chatper
66 Verified Questions
66 Flashcards
Source URL: https://quizplus.com/quiz/26355
Sample Questions
Q1) Pair production requires an x-ray photon with an energy of at least
A)0.51 MeV
B)1.02 MeV
C)1.51 MeV
D)2.04 MeV
Q2) 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
Q3) The probability of a photoelectric interaction depends on the atomic number of the atom.
A)True
B)False
Q4) The Compton electron
A)typically exits the patient as part of the remnant radiation
B)does not have enough energy to produce further interactions
C)has enough energy to produce further interactions
D)A and B
To view all questions and flashcards with answers, click on the resource link above. Page 9
Chapter 8: Image Production
Available Study Resources on Quizplus for this Chatper
66 Verified Questions
66 Flashcards
Source URL: https://quizplus.com/quiz/26356
Sample Questions
Q1) In the image intensifier,the electrostatic lenses
A)convert remnant radiation to light
B)focus the electrons
C)convert light to electrons
D)absorb the energized electrons and produces a brighter image
Q2) In the image intensifier,the output phosphor
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
Q3) Scatter radiation that reaches the image receptor creates
A)unwanted density
B)useful information
C)fog
D)A and B
E)A and C
Q4) Tissue that is more dense results in
A)increased attenuation
B)decreased attenuation
C)no change in attenuation
Page 10
To view all questions and flashcards with answers, click on the resource link above.
Chapter 9: Image Quality and Characteristics
Available Study Resources on Quizplus for this Chatper
129 Verified Questions
129 Flashcards
Source URL: https://quizplus.com/quiz/26357
Sample Questions
Q1) Size distortion is also called
A)elongation
B)magnification
C)shape distortion
D)foreshortening
Q2) Increasing exposure intensity results in
A)more black metallic silver
B)less black metallic silver
C)more optical density
D)A and C
E)B and C
Q3) Resolution is typically measured in
A)line pairs per millimeter
B)line pairs per meter
C)line pairs per inch
D)line pairs per foot
Q4) The response of the film to the remnant radiation is part of subject contrast.
A)True
B)False
To view all questions and flashcards with answers, click on the resource link above. Page 11
Chapter 10: Radiographic Exposure Technique
Available Study Resources on Quizplus for this Chatper
135 Verified Questions
135 Flashcards
Source URL: https://quizplus.com/quiz/26358
Sample Questions
Q1) Given 40 mAs,doubling the mA produces the same result as
A)doubling the time of exposure
B)doubling the mAs
C)halving the mAs
D)A and B
E)A and C
Q2) To adjust the kVp to produce the desired contrast level,the kVp must first be
A)as low as possible for radiation safety
B)as high as possible
C)high enough to penetrate the part
D)none of the above
Q3) When OID cannot be reduced,it is possible to reduce size distortion by
A)increasing mAs
B)increasing SID
C)using a small focal spot size
D)decreasing SID
Q4) The higher the grid ratio,the less efficient the grid is at absorbing scatter radiation.
A)True
B)False
To view all questions and flashcards with answers, click on the resource link above. Page 12
Chapter 11: Scatter Control
Available Study Resources on Quizplus for this Chatper
80 Verified Questions
80 Flashcards
Source URL: https://quizplus.com/quiz/26359
Sample Questions
Q1) 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.
Q2) Restriction of the primary beam to the anatomy of interest
A)reduces patient exposure
B)is a major cause of repeated images
C)reduces the amount of scatter produced
D)A and C
E)B and C
Q3) The grid is part of a device located just below the tabletop that also includes a tray to hold the IR.This device is the
A)wafer grid
B)bucky
C)grid cap
D)grid cassette
To view all questions and flashcards with answers, click on the resource link above.
13
Chapter 12: Image Receptors
Available Study Resources on Quizplus for this Chatper
176 Verified Questions
176 Flashcards
Source URL: https://quizplus.com/quiz/26360
Sample Questions
Q1) The part of a PSP plate that gives some rigidity to the plate is the
A)conductive layer
B)structured phosphor layer
C)turbid phosphor layer
D)support layer
Q2) The human eye can appreciate approximately _______ shades of gray at a particular level.
A)5
B)10
C)30
D)300
Q3) Orthochromatic film is sensitive to
A)blue light
B)green light
C)red light
D)any light
Q4) As the pixel size decreases,the spatial resolution
A)increases
B)decreases
C)remains the same
To view all questions and flashcards with answers, click on the resource link above. Page 14
Chapter 13: Exposure Technique Selection
Available Study Resources on Quizplus for this Chatper
63 Verified Questions
63 Flashcards
Source URL: https://quizplus.com/quiz/26361
Sample Questions
Q1) The actual amount of exposure used for an image when AEC is being used is the A)mAs readout
B)back-up time
C)minimum response time
D)density controls
Q2) Collimation is not required when AEC is used.
A)True
B)False
Q3) There is typically a configuration of at least _________ AEC detectors in place
A)2
B)3
C)4
D)5
Q4) When the radiographer has the opportunity to set the back-up time,it should be approximately _____________ of the expected exposure time
A)50%
B)150%
C)250%
D)600%
To view all questions and flashcards with answers, click on the resource link above. Page 15
Chapter 14: Image Intensified Fluoroscopy
Available Study Resources on Quizplus for this Chatper
95 Verified Questions
95 Flashcards
Source URL: https://quizplus.com/quiz/26362
Sample Questions
Q1) The radiographer may be responsible for the ________________ inspection of the fluoroscopic equipment for quality control purposes.
A)performance
B)operational
C)supervisory
D)A and B
Q2) The purpose of a camera tube or CCD is to record the fluoroscopic image.
A)True
B)False
Q3) Which of the following requires more radiation to produce quality fluoroscopic images?
A)Conventional image intensifier.
B)Flat-panel detector in place of image intensifier.
C)There is no difference between the two.
Q4) Fluoroscopic equipment should be inspected every A)week
B)month
C)6 months
D)year
To view all questions and flashcards with answers, click on the resource link above. Page 16
Chapter 15: Additional Equipment
Available Study Resources on Quizplus for this Chatper
53 Verified Questions
53 Flashcards
Source URL: https://quizplus.com/quiz/26363
Sample Questions
Q1) Unless otherwise required,during C-arm fluoroscopic procedures the image intensifier should be located
A)beneath the patient
B)to the side of the patient
C)above the patient
Q2) To produce the low kVp photons needed for mammography,the tube anode target is made of
A)molybdenum
B)tungsten
C)rhodium
D)A and C
Q3) AEC devices are always used for mobile radiographic imaging
A)True
B)False
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
To view all questions and flashcards with answers, click on the resource link above. Page 17
Chapter 16: Computed Tomography
Available Study Resources on Quizplus for this Chatper
136 Verified Questions
136 Flashcards
Source URL: https://quizplus.com/quiz/26364
Sample Questions
Q1) 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
Q2) The matrix of CT numbers is the
A)array processor
B)algorithm
C)filtered back projection
D)image data
Q3) Which of the following measures mean absorbed dose in the scanned object volume,adjusted for weighted index and pitch in MSCT?
A)CTDI<sub>100</sub>
B)CTDI<sub>vol</sub>
C)DLP
D)Dose report
Q4) Electron-beam CT does not use an x-ray tube.
A)True
B)False
Page 18
To view all questions and flashcards with answers, click on the resource link above.