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

,CHAPTER 1: INTRODUCTION TO RADIOLOGIC SCIENCE b r br b r br b r




1. Which of the following best describes the primary purpose of diagnostic r
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adiography?
A. To treat diseases using ionizing radiation
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B. To produceimages 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 br




Rationale: Diagnostic radiography’s main purpose is to produce images of internal b
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odystructures, allowing physicians to detect and diagnose abnormalities. Options A,
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C, and D are unrelated to diagnostic imaging.
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2. What is the primary source ofionizing radiation in medical imaging?
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A. MRI scanner br




B. X-ray tube br




C. Ultrasound transducer br




D. PET scanner br




Answer: B br




Rationale:The X- br br




ray tube generates ionizing radiation used in diagnostic radiography. MRI and ultr
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asound use non- br br




ionizing energy, while PET uses radioactive tracers rather than producing radiation
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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 br br br br br




B. Minimizing radiation exposure while achieving diagnostic quality br br br br br br




C. Limiting patient interaction to reduce infection br br br br br




D. Increasing exposure time for better penetration br br br br br




Answer: B br




Rationale: ALARA (“As Low As Reasonably Achievable”) ensures patient and st br br br br br br b r br br br




aff receive the minimum radiation dosenecessary for diagnostic-quality images.
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,4. A radiologic technologist is preparing to image a patient with a suspected f
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racture. Which safety measure is most important?
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A. Using the fastest imaging speed br br br br




B. Ensuring properpatient shielding and positioning br br br br br




C. Increasing exposure to reduce repeat images br br br br br




D. Allowing the patient to move during imaging br br br br br br




Answer: B br




Rationale:Propershielding and positioning minimize unnecessary exposure and prot
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ect radiosensitive tissues. Options A, C, and D can increase radiation risk or degrade
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image quality. br




5. Scenario:A 45-year- rb br




old patient expresses concern about radiation exposure. How should the technolo
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gist respond?
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A. Ignore their concerns;radiation is safe br br br br br




B. Explain that doseis minimized and benefits outweigh risks
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C. Refuse to performthe exam br br br br




D. Increase exposure to ensure better images br br br br br




Answer: B br




Rationale:Patients should be informed about the low doseand the diagnostic benefi
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ts, reducing anxiety and promoting informed consent.
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6. Which professional organization establishes standards for radiologic t
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echnologists?
A. WHO
B. ASRT
C. FDA
D. CDC
Answer: B br




Rationale: The American Society of Radiologic Technologists (ASRT) sets educatio
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nal and professional standards.FDA regulates equipment, CDC focuses on infection co
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ntrol, 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 br




Rationale:MRI uses magnetic fields and radio waves, which are non-
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ionizing. CT, X-ray, and fluoroscopyall 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 marrowbr




D. Cartilage
Answer: C br




Rationale:Bone marrow contains rapidly dividing cells, making it highly sensitive to
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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 br




B. Tube voltage and current
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C. Room temperature br




D. Technologist height br




Answer: B br




Rationale:Tube voltage (kVp) and current (mA) controlX-
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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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