Radiologic Physics Study Guide Questions
Course Introduction
Radiologic Physics is a foundational course that explores the principles and applications of physics as they pertain to medical imaging and radiation therapy. The course covers essential topics such as the structure of matter, the behavior of ionizing and non-ionizing radiation, x-ray production and interactions, the fundamentals of dosimetry, and the physical principles underlying various imaging modalities, including radiography, computed tomography (CT), and magnetic resonance imaging (MRI). Emphasis is placed on understanding radiation safety, image formation, and the technical aspects influencing image quality and patient dose. This course provides students with the scientific knowledge necessary to comprehend the operation of radiologic equipment and ensures a solid background for advanced study in medical imaging and radiation sciences.
Recommended Textbook
Radiographic Imaging and Exposure 5th Edition by Terri L. Fauber
Available Study Resources on Quizplus
10 Chapters
621 Verified Questions
621 Flashcards
Source URL: https://quizplus.com/study-set/2258 Page 2
Chapter 1: Radiation and Its Discovery
Available Study Resources on Quizplus for this Chatper
42 Verified Questions
42 Flashcards
Source URL: https://quizplus.com/quiz/44855
Sample Questions
Q1) In conjunction with ALARA,which of the following cardinal principles help to minimize radiation exposure?
I.Time-Increase time exposed to ionizing radiation
II.Time-Decrease time exposed to ionizing radiation
III.Distance-Increase distance from ionizing radiation
IV.Distance-Decrease distance from ionizing radiation
V.Shielding-Maximize use of shielding from ionizing radiation
A) I, III, and V
B) I, IV, and V
C) II, III, and V
D) II, IV, and V
Answer: C
Q2) X-rays cannot be focused with a lens.
A)True
B)False
Answer: True
To view all questions and flashcards with answers, click on the resource link above.
Page 3
Chapter 2: The X-Ray Beam
Available Study Resources on Quizplus for this Chatper
66 Verified Questions
66 Flashcards
Source URL: https://quizplus.com/quiz/44856
Sample Questions
Q1) With a standard x-ray tube,______________% of the x-ray beam produced with 65 kVp is the result of bremsstrahlung interactions.
A) 0
B) 15
C) 85
D) 100
Answer: D
Q2) The highest energy x-ray photons produced with a 100 kVp exposure will be:
A) 50 keV.
B) 75 keV.
C) 100 keV.
D) 125 keV.
Answer: C
Q3) When an electron from the L-shell of the tungsten atom is ejected from its orbit by a projectile electron,high-energy x-ray photons are produced.
A)True
B)False
Answer: False
To view all questions and flashcards with answers, click on the resource link above. Page 4
Chapter 3: Image Formation and Radiographic Quality
Available Study Resources on Quizplus for this Chatper
68 Verified Questions
68 Flashcards
Source URL: https://quizplus.com/quiz/44857
Sample Questions
Q1) Beam attenuation __________ with a higher-energy x-ray beam.
A) increases
B) decreases
C) stays the same
Answer: B
Q2) When the x-ray photon strikes an atom within the tissue being imaged and loses only part of its energy to an outer shell electron of that atom,the photon is said to have been _____ and undergone the _____.
A) transmitted; coherent effect
B) absorbed; photoelectric interaction
C) attenuated; photoelectric interaction
D) scattered; Compton interaction
Answer: D
Q3) A radiographic image with a large number of similar densities that have small differences between them:
A) appears gray.
B) has long scale contrast.
C) has low contrast.
D) all of the above.
Answer: D
To view all questions and flashcards with answers, click on the resource link above. Page 5
Chapter 4: Digital Imaging
Available Study Resources on Quizplus for this Chatper
101 Verified Questions
101 Flashcards
Source URL: https://quizplus.com/quiz/44858
Sample Questions
Q1) Which of the following is not part of a CR reader unit?
A) Optical system
B) ADC
C) Photodetector
D) Developer tank
Q2) With CR,a higher sampling frequency results in _____________ pixel size and ____________ spatial resolution.
A) increased; increased
B) increased; decreased
C) decreased; increased
D) decreased; decreased
Q3) The quality of the CR latent image will remain the same for up to 6 h after exposure.
A)True
B)False
Q4) Which of the following is not accomplished through the histogram analysis?
A) Compensation for image underexposure
B) Identification of the edges of the image
C) Manipulation of image contrast
D) Compensation for image overexposure
To view all questions and flashcards with answers, click on the resource link above. Page 6
Chapter 5: Film-Screen Imaging
Available Study Resources on Quizplus for this Chatper
69 Verified Questions
69 Flashcards
Source URL: https://quizplus.com/quiz/44859
Sample Questions
Q1) The ability of a radiographic film to provide a level of contrast can be evaluated by the __________ of the sensitometric curve.
A) slope
B) steepness
C) shoulder
D) A and B
E) B and C
Q2) The ability of radiographic film to provide a certain level of image contrast is the:
A) film sensitivity.
B) film speed.
C) intensifying screen type.
D) film contrast.
Q3) What is the term generally used to describe the emission of light from a substance as the result of stimulation by radiation?
A) Luminescence
B) Phosphorescence
C) Fluorescence
D) Incandescence
To view all questions and flashcards with answers, click on the resource link above.
Chapter 6: Exposure Technique Factors
Available Study Resources on Quizplus for this Chatper
67 Verified Questions
67 Flashcards
Source URL: https://quizplus.com/quiz/44860
Sample Questions
Q1) Once the part has been penetrated,a doubling of the mAs results in ____________ the exposure to the IR.
A) one fourth
B) one half
C) two times
D) four times
Q2) With digital imaging,the same mAs and kVp should be used for an AP lumbar spine and a lateral lumbar spine.
A)True
B)False
Q3) In order to image a structure that is located anteriorly in the body,it is best radiographed to minimize magnification by doing a(n)_____ projection.
A) posterior-anterior
B) anterior-posterior
C) lateral
D) oblique
Q4) Any increase in magnification results in a decrease in recorded detail.
A)True
B)False
To view all questions and flashcards with answers, click on the resource link above. Page 8
Chapter 7: Scatter Control
Available Study Resources on Quizplus for this Chatper
55 Verified Questions
55 Flashcards
Source URL: https://quizplus.com/quiz/44861
Sample Questions
Q1) When using a digital flat-panel detector:
A) the x-ray beam will automatically collimate to the appropriate size for the part.
B) the entire detector should be exposed.
C) the radiographer must adjust the collimator to the area of interest.
D) A and C.
Q2) Also called lateral decentering,the _____ grid error results when the central ray is not aligned to the middle of a focused grid.
A) off-level
B) off-focus
C) off-center
D) upside-down focused
Q3) What occurs when the x-ray beam is not properly aligned with the grid strips?
A) Bucky delamination
B) Grid cutoff
C) Increased exposure to the IR
D) Nothing
Q4) The only reason a grid should be used is to increase radiographic contrast.
A)True
B)False
To view all questions and flashcards with answers, click on the resource link above. Page 9
Chapter 8: Exposure Technique Selection
Available Study Resources on Quizplus for this Chatper
57 Verified Questions
57 Flashcards
Source URL: https://quizplus.com/quiz/44862
Sample Questions
Q1) Exposure time will ______ using AEC when patient thickness decreases.
A) decrease
B) remain the same
C) increase
D) double
Q2) Two identical rooms having the same generator and tube and installed at the same time do not require development of separate technique charts.The chart for one room can accurately be used in the other.
A)True
B)False
Q3) What is the appropriate change in kVp when using a variable kVp-fixed mAs technique chart for a 1 cm change in tissue thickness?
A) 2 kVp
B) 4 kVp
C) 6 kVp
D) 10 kVp
Q4) Technique charts are still needed when using AEC.
A)True
B)False
To view all questions and flashcards with answers, click on the resource link above. Page 10
Chapter 9: Image Evaluation
Available Study Resources on Quizplus for this Chatper
25 Verified Questions
25 Flashcards
Source URL: https://quizplus.com/quiz/44863
Sample Questions
Q1) When using a digital imaging system,changing from 8 × 10 collimation to 14 × 17 collimation would result in _____________ brightness and ____________ contrast.
A) no change in; no change in
B) decreased; increased
C) no change in; decreased
D) decreased; decreased
Q2) Using a Konica digital imaging system,if an image's S number is 600 while the optimal range ends at 300,this means that the IR was ______________ and the exposure to the IR needs to be ___________________.
A) underexposed; doubled
B) under exposed; halved
C) overexposed; doubled
D) overexposed; halved
Q3) Which of the following changes would produce a digital image with decreased brightness?
A) Increased mAs
B) Decreased kVp
C) Increased patient thickness
D) None of the above
To view all questions and flashcards with answers, click on the resource link above.
Page 11
Chapter 10: Dynamic Imaging: Fluoroscopy
Available Study Resources on Quizplus for this Chatper
71 Verified Questions
71 Flashcards
Source URL: https://quizplus.com/quiz/44864
Sample Questions
Q1) This recording system allows the film to be divided into two,four,or more images.
A) Cassette spot imaging
B) Film cameras for spot filming
C) Videotape
D) None of the above
Q2) Each capacitor in a CCD represents a(n):
A) line.
B) image.
C) pixel.
D) electric charge.
Q3) The ABC can be slow in responding,seen as a brief delay in the brightness adjustment.
A)True
B)False
Q4) The formula for brightness gain is:
A) brightness gain = minification gain - flux gain.
B) brightness gain = minification gain/flux gain.
C) brightness gain = minification gain × flux gain.
D) brightness gain = minification gain + flux gain.
To view all questions and flashcards with answers, click on the resource link above. Page 12