Diagnostic Imaging Exam
Materials
Course Introduction
Diagnostic Imaging is a comprehensive course that introduces students to the principles and applications of medical imaging technologies used for diagnosing diseases and monitoring patient health. The course covers foundational topics such as the physics of X-rays, ultrasound, computed tomography (CT), magnetic resonance imaging (MRI), and nuclear medicine. Students will examine the clinical indications, advantages, and limitations of each modality, as well as the interpretation of imaging results. Emphasis is placed on safety protocols, image quality optimization, and the role of diagnostic imaging in treatment planning. Case studies and hands-on sessions help develop practical skills essential for healthcare professionals in modern clinical settings.
Recommended Textbook
Essentials of Radiographic Physics and Imaging 2nd Edition by James Johnston
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16 Chapters
1530 Verified Questions
1530 Flashcards
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Chapter 1: Introduction to the Imaging Sciences
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76 Verified Questions
76 Flashcards
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Sample Questions
Q1) Who brought attention to the dangers of x-rays?
A)Wilhelm Roentgen.
B)Bertha Roentgen.
C)Crookes.
D)Thomas Edison.
Answer: D
Q2) Mass,length,and time are considered
A)fundamental quantities
B)derived quantities
C)radiologic quantities
D)none of the above
Answer: A
Q3) The property of an object with mass that resists a change in its state of motion is A)momentum
B)power
C)energy
D)inertia
Answer: D
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3
Chapter 2: Structure of the Atom
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Sample Questions
Q1) The force that holds the protons and neutrons together in the nucleus is the
A)nuclear binding energy
B)electron binding energy
C)atomic energy
D)proton/neutron energy
Answer: A
Q2) Each electron shell has a specific limit to the amounts of electrons it can hold.
A)True
B)False
Answer: True
Q3) The word atom is derived from the Greek word atomos,meaning
A)nuclear
B)small
C)indivisible
D)invisible
Answer: C
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Page 4
Chapter 3: Electromagnetic and Particulate Radiation
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58 Flashcards
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Sample Questions
Q1) Half-life is defined as
A)half the time it takes for all of the remaining atoms in an amount of a radioactive element to decay
B)half the time it takes for half the remaining atoms in an amount of a radioactive element to decay
C)the time it takes for half the remaining atoms in an amount of a radioactive element to decay
D)none of the above
Answer: C
Q2) All electromagnetic radiation travels at the same speed.
A)True
B)False
Answer: True
Q3) In the formula E = hf,energy is measured in A)volts
B)amps
C)frequency volts
D)electron volts
Answer: D
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Page 5
Chapter 4: The X-Ray Circuit
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152 Verified Questions
152 Flashcards
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Sample Questions
Q1) A device that converts electrical energy to mechanical energy is a A)motor
B)transformer
C)generator
D)electromagnet
Q2) The rectifiers are found on the
A)primary circuit
B)secondary circuit
C)filament circuit
D)none of the above
Q3) The force of magnetic attraction varies
A)directly with the square of the strength of the poles
B)inversely with the square of the strength of the poles
C)directly with the square of the distance between the poles
D)inversely with the square of the distance between the poles
Q4) Every magnet has a north,south,east,and west pole.
A)True
B)False
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Chapter 5: The X-Ray Tube
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110 Flashcards
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Sample Questions
Q1) The two types of anode designs are stationary and A)traveling
B)rotating
C)dynamic
D)all of the above
Q2) The focusing cup is made of
A)tungsten
B)nickel
C)thorium
D)molybdenum
Q3) Using very long exposures can lead to tube damage or failure.
A)True
B)False
Q4) Arcing
A)is a problem associated with glass envelopes
B)is a problem associated with metal envelopes
C)is another name for the flow of electrons from cathode to anode
D)is another name for the flow of electrons from anode to cathode
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Chapter 6: X-Ray Production
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72 Flashcards
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Sample Questions
Q1) The energy of the brems photon depends on
A)the original energy of the filament electron
B)the strength of the attraction between the electron and the nucleus
C)the energy of the filament electron as it leaves the tungsten atom
D)all of the above
Q2) If the intensity of the beam is 900 mR at a distance of 21 inches,what does the distance need to be for the intensity to measure 100 mR?
A)7 inches.
B)10.5 inches.
C)42 inches.
D)63 inches.
Q3) Which of the following is the primary factor controlling quantity?
A)kVp.
B)mAs.
C)Distance.
D)Filtration.
Q4) Generally speaking,an increase in the quantity of radiation results in decreased patient dose.
A)True
B)False
Page 8
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Chapter 7: X-Ray Interactions With Matter
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66 Flashcards
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Sample Questions
Q1) The energy of the photoelectron is the least as a result of a photoelectric interaction in
A)bone
B)soft tissue
C)fat
D)the energy level is the same for all
Q2) With Compton scattering,the incident photon
A)loses none of its energy
B)loses up to one third of its energy
C)loses up to one half of its energy
D)does not lose any energy
Q3) The probability of Compton scattering depends on the atomic number of the atom.
A)True
B)False
Q4) The primary source of radiation exposure to the radiographer who is in the room during an exposure is
A)from scatter from the table
B)from scatter from the patient
C)from scatter from the image receptor
D)hard to determine;it depends on the procedure being done
Page 9
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Chapter 8: Image Production
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66 Flashcards
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Sample Questions
Q1) 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
Q2) A high-energy beam results in
A)increased attenuation
B)decreased attenuation
C)no change in attenuation
Q3) Tissue that is more dense results in
A)increased attenuation
B)decreased attenuation
C)no change in attenuation
Q4) Flux gain of the image intensifier is the
A)increase in the number of light intensities at the output phosphor
B)increased brightness of the image as a result of the output phosphor being much smaller than the input phosphor
C)combination of minification gain and flux gain
D)none of the above
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Chapter 9: Image Quality and Characteristics
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129 Verified Questions
129 Flashcards
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Sample Questions
Q1) 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
Q2) Who evaluates the overall brightness or density on the image to determine if it is sufficient to visualize the anatomic area of interest?
A)Patient.
B)Radiologist.
C)Supervisor.
D)Radiographer.
Q3) Image contrast and contrast resolution are the same.
A)True
B)False
Q4) Increasing visibility of darker anatomic regions is accomplished by
A)raising the window level
B)lowering the window level
C)increasing the window width
D)decreasing the window width
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Chapter 10: Radiographic Exposure Technique
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Sample Questions
Q1) What type of relationship does mAs have with SID when the goal is to keep the exposure to the IR constant?
A)Direct proportional.
B)Direct but not proportional.
C)Inverse proportional.
D)Inverse but not proportional.
Q2) In maintaining the same mAs,there is a(n)________________ relationship between mA and exposure time.
A)direct
B)inverse
C)added
D)none of the above
Q3) A lateral ankle position requires less exposure than an AP ankle projection because
A)all lateral positions require less exposure
B)all lateral positions require more exposure
C)part thickness is greater from front to back
D)part thickness is greater from side to side
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Chapter 11: Scatter Control
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80 Flashcards
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Sample Questions
Q1) The volume of tissue irradiated is determined by
A)the area of collimation
B)patient thickness
C)field size
D)all of the above
Q2) A focused grid's lead strips are angled to match
A)the anode angle
B)the angle of the x-rays in the primary beam
C)the angle of the scattered photons leaving the patient
D)the tube angulation
Q3) _____________________ collimation means _________________ field size.
A)Decreasing;increasing
B)Increasing;increasing
C)Decreasing;decreasing
D)none of the above
Q4) The reason the grid in the bucky reciprocates is to
A)absorb more scatter radiation
B)allow more transmitted radiation to reach the IR
C)blur out the grid lines
D)all of the above
Chapter 12: Image Receptors
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176 Verified Questions
176 Flashcards
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Sample Questions
Q1) Sampling pitch is
A)the distance between laser beam positions during processing of the plate
B)the distance between adjacent detector elements
C)how digital detectors sample the x-ray exposure
D)all of the above
Q2) Which of the following describes the extra step,and is therefore a limitation,of indirect-capture methods?
A)X-rays are converted to light and then to electrons
B)X-rays are converted directly to electrons
C)Electrons are converted to light,and then to x-rays
D)A and B
Q3) The smaller the crystal in the phosphor layer of an intensifying screen,the _______ light will be produced,and the ________ the screen speed
A)less;slower
B)less;faster
C)more;slower
D)more;faster
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Chapter 13: Exposure Technique Selection
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Sample Questions
Q1) AEC devices should be calibrated
A)when the unit is first installed
B)at regular intervals
C)when there is a change in the type of IR being used
D)All of the above
Q2) If an AEC has three detectors,only one of the three can be selected for an exposure.
A)True
B)False
Q3) 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 exposure time is ________________________.(Assume all other factors are appropriate. )
A)darker;longer
B)darker;shorter
C)unchanged;unchanged
D)unchanged;longer
Q4) Once a part has been selected using APR,the exposure factors cannot be adjusted.
A)True B)False
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Chapter 14: Image Intensified Fluoroscopy
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95 Flashcards
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Sample Questions
Q1) Flat-panel detectors for fluoroscopic imaging can be the
A)cesium iodide amorphous silicon indirect-capture detector
B)amorphous selenium direct-capture detector
C)amorphous silicon direct-capture detector
D)A and B
E)A and C
Q2) The beam-splitting mirror is never used with fiberoptics.
A)True
B)False
Q3) This allows the film to be divided into 2,4,or more images
A)Cassette spot filming with masking shutters
B)Film cameras for spot filming
C)Videotape
D)Flat panel detector
Q4) For detectors to produce high-quality fluoroscopic images,they must be able to
A)respond very quickly
B)respond many times in a row
C)have application-specific integrated circuits for noise reduction
D)all of the above
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Chapter 15: Additional Equipment
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Sample Questions
Q1) The thickness,or width,of the focal plane is called a A)level
B)section
C)portion
D)fulcrum
Q2) 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
Q3) The dedicated unit designed to image the thorax in the upright position is the A)chest
B)panorex
C)mammography
D)bone densitometry
Q4) Challenges when performing mobile radiographic imaging include
A)having to use SIDs other than 40 inches or 72 inches
B)difficulty minimizing off-level grid cutoff
C)patient condition
D)all of the above
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Chapter 16: Computed Tomography
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136 Flashcards
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Sample Questions
Q1) Also known as low contrast resolution,this quality determines the system's ability to distinguish between very similar tissues
A)Noise
B)Spatial resolution
C)Contrast resolution
D)All of the above
Q2) The formula for dose length product (DLP)is
A)DLP = CTDIvol x scan length of exposure
B)DLP = CTDIvol + scan length of exposure
C)DLP = CTDIvol - scan length of exposure
D)DLP = CTDIvol / scan length of exposure
Q3) How will a pixel with a CT number of 250 appear if the WW is 200 and the WL is 50?
A)Black
B)White
C)Gray
D)It is impossible to say
Q4) Image postprocessing results in the image data changing.
A)True
B)False
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