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Unformatted text preview: RADT 153
Unit 14 Exam The Effects of
14.0 Interaction of X-Radiation with Matter Comprehensive Unit Exam
1. Write your name and the date on your scantron form. Identify the
subject as the course number (for example, RADT 102) along with
the test number (for example, Unit 1). 2. For each of the questions below, select the best answer to the
question. 3. Using a No. 2 pencil, fill in the appropriate answer on the answer
sheet. 4. Erase unwanted answers completely. Questions with two or more
filled in answer spaces are graded as incorrect. 5. Answer all questions. 6. You have a maximum 15 minutes to complete the following 25
questions. (Note this time factor approximates the amount of time
you would be allowed to answer the same number of questions on
the Registry examination in radiography) 1. What is the biggest single cause of loss of recorded detail on a
A. Large collimation
C. Low KVP
D. Low mAs
E. High mAs 2. There are two types of motion a radiographer should be aware of -accidental and physiologic.
B. False 3
3. A way to eliminate accidental movement is by
A. Long exposure times
B. High mAs
C. High kVp
D. Immobilization techniques
E. Small collimation 4. Radiographers have total control over involuntary motion
B. False 5. Which result is not a negative aspect of movement on a radiograph
A. Radiograph will appear fuzzy
B. Radiograph will appear blurred
C. Image will be unsharp and will lose recorded detail.
D. Loss of image recognition
E. Blurring of parts that superimpose others 6. What must a radiographer do to try to stop involuntary movement
on a radiograph
A. Small collimation
B. Higher kVp
C. Shortest exposure time
D. Use breathing techniques
E. Use immobilization devices 7. Which area of radiography requires the greatest use of motion
A. Trauma radiography
B. Skull radiography
D. Chest radiography
E. Mobile radiography 8. A positive aspect of blurring on a radiograph is when blurring of
parts that superimpose other parts is done deliberately.
B. False 4
9. Which is not one of the four other names for tomography.
E. Body-section 10. Tomography is done by moving the tube in one direction and the
film in the opposite direction causing the anatomical structures in
the desired plane to appear poorly defined.
B. False 11. Motion has no effect on radiographic density.
B. False 12. Motion has substantial effects on radiographic contrast.
B. False 13. Recorded detail is the sharpness of structural lines of the image
details on the radiograph.
B. False 14. Explain the best way to reduce motion in radiographs.
A. Increase collimation
B. High kVp
C. Gain confidence of the patient.
D. Low mAs
E. Lower kVp 15. Radiographers gain confidence of their patients by explaining what
is going to happen to them, what is expected of them and then
answering their questions.
B. False 5
16. What is the advantage of short exposure time
A. Patient is exposed to less radiation
B. Better definition of structural details
C. Patient does not get uncomfortable
D. Less time patient is in radiology suit.
E. Radiologist gets results faster 17. Why should automatic exposure controls not be used if movement
is a concern.
A. Patients cannot maintain a position
B. Patients cannot use proper breathing techniques without
C. To protect patients from repeat exposures
D. All of the above
E. None of the above 18. Radiographers can compensate for patients inability to help in the
radiographic process by shortening the exposure time.
B. False 19. Explain when immobilization can be used.
A. To control patient if they are out of control
B. To control accidental motion
C. To secure a non-cooperative patient
D. To secure a patient that doesn't what the radiographs
E. It should be used with every radiograph 20. Which is not an immobilization device
B. Cellulose positioning blocks
E. Radiographers strength 6
21. Immobilization devices should be placed just prior to the exposure
and removed after the exposure when the patient has had time to
relax. Comfort of the patient is not a concern.
B. False 22. An injured patient can be immobilized cautiously, be careful when
working around injured areas.
B. False 23. Which is not a type of equipment that can cause movement on the
exposure if not properly locked in place.
A. Film holder
B. X-ray tube
E. Chest holder 24. Which is not an item that can be used to make film holders more
A. Vertical film holders
B. Sand bags
C. Immobilization bands
D. Radiographers strength
E. Tape 25. Motion has no effect on size and shape distortion.
B. False ...
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- Spring '11