TEST BANK FOR Bushong’s Radiologic Science for Technologists: Physics, Biology, and Protection 13th Edition by Stewart C. Bushong , Elizabeth Shields ISBN:978-0323765367 ALL CHAPTERS COVERED YOUR ULTIMATE GUIDE 100% VERIFIED A+ GRADE ASSURED!!!!!! NEW LA

,CHAPTER 1: INTRODUCTION TO RADIOLOGIC SCIENCE
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1. Which of the following best describes the primary purpose of diagno
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stic radiography?
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A. To treat diseases using ionizing radiation
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B. To produce images of internal structures for diagnosis
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C. To monitor patient vital signs
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D. To sterilize medical equipment
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Answer: B NK



Rationale: Diagnostic radiography’s main purpose is to produce images of inter
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nal body structures, allowing physicians to detect and diagnose abnormalities.
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Options A, C, and D are unrelated to diagnostic imaging.
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2. What is the primary source of ionizing radiation in medical imaging?
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A. MRI scanner NK



B. X-ray tube NK



C. Ultrasound transducer NK



D. PET scanner NK




Answer: B NK



Rationale: The X- NK NK



ray tube generates ionizing radiation used in diagnostic radiography. MRI a
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nd ultrasound use non-
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ionizing energy, while PET uses radioactive tracers rather than producing ra
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diation in a tube.
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3. How does the ALARA principle guide radiologic practice?
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A. Maximizing image quality regardless of dose NK NK NK NK NK



B. Minimizing radiation exposure while achieving diagnostic quality
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C. Limiting patient interaction to reduce infection
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D. Increasing exposure time for better penetration
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Answer: B NK



Rationale: ALARA (“As Low As Reasonably Achievable”) ensures patient a
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nd staff receive the minimum radiation dose necessary for diagnostic-
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quality images. NK

,4. A radiologic technologist is preparing to image a patient with a suspe
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cted fracture. Which safety measure is most important?
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A. Using the fastest imaging speed
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B. Ensuring proper patient shielding and positioning
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C. Increasing exposure to reduce repeat images
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D. Allowing the patient to move during imaging
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Answer: B NK



Rationale: Proper shielding and positioning minimize unnecessary exposure and
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protect radiosensitive tissues. Options A, C, and D can increase radiation risk
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or degrade image quality.
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5. Scenario: A 45-year- N
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old patient expresses concern about radiation exposure. How should the te
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chnologist respond? NK



A. Ignore their concerns; radiation is safe
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B. Explain that dose is minimized and benefits outweigh risks
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C. Refuse to perform the exam
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D. Increase exposure to ensure better images
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Answer: B NK



Rationale: Patients should be informed about the low dose and the diagnostic
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benefits, reducing anxiety and promoting informed consent.
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6. Which professional organization establishes standards for radiolo
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gic technologists?
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A. WHO
B. ASRT
C. FDA
D. CDC
Answer: B NK



Rationale: The American Society of Radiologic Technologists (ASRT) sets edu
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cational and professional standards. FDA regulates equipment, CDC focuses on in
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fection control, WHO on global health.
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, 7. Which imaging modality does not use ionizing radiation?
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A. CT scan
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B. MRI
C. X-ray
D. Fluoroscopy
Answer: B NK



Rationale: MRI uses magnetic fields and radio waves, which are non-
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ionizing. CT, X-ray, and fluoroscopy all use ionizing radiation.
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8. What is the most radiosensitive tissue in the human body?
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A. Muscle
B. Skin
C. Bone marrow
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D. Cartilage
Answer: C NK



Rationale: Bone marrow contains rapidly dividing cells, making it highly sensit
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ive to ionizing radiation. Muscle, skin, and cartilage are less sensitive.
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9. Which factor primarily affects the quality of an X-ray image?
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A. Patient diet NK



B. Tube voltage and current
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C. Room temperature
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D. Technologist height NK




Answer: B NK



Rationale: Tube voltage (kVp) and current (mA) control X-
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ray energy and photon quantity, directly affecting image quality.
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10. How often should radiologic equipment be tested for quality assurance?
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A. Daily
B. Monthly
C. Annually
D. Only when malfunction occurs
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