Radiation Health & SafetyCâu 1 / 100
A dental assistant is asked to explain the ALARA concept to a new hire. Which statement best describes ALARA?
a.Radiation exposure is safe as long as it stays under the annual legal limit
b.Only the patient's exposure must be minimized, not the operator's
c.Every reasonable step should be taken to keep exposure As Low As Reasonably Achievable
d.Exposure may be increased if it produces a sharper image
Giải thích
ALARA stands for As Low As Reasonably Achievable, meaning exposure to patients and staff should be reduced to the lowest practical level even when legal limits are not exceeded. Staying under a legal limit is a minimum requirement, not the goal, so the first option is wrong. ALARA protects both patients and operators, and image quality is achieved through correct technique rather than extra radiation.
Trích dẫn luật: NCRP Report No. 145: Radiation Protection in DentistryLuyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- What is the generally accepted annual whole-body occupational dose limit for a dental assistant who works with radiographic equipment?
- A patient is seated for a full-mouth series. Which combination best protects the patient's most radiosensitive tissues during the exposures?
- The operatory has no protective barrier or wall to stand behind during an exposure. What is the minimum distance and position the operator should use?
- The dentist asks the assistant to increase the penetrating power of the x-ray beam for a patient with dense bone. Which exposure factor should be adjusted?
- Which pair of settings together determines the QUANTITY (number of photons) of radiation produced during an exposure?
- A practice replaces its round position-indicating devices with rectangular collimation. What is the main benefit to the patient?
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