Radiation Health & SafetyCâu 5 / 100
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?
a.Milliamperage (mA)
b.Kilovoltage peak (kVp)
c.Exposure time
d.Source-to-film distance
Giải thích
Kilovoltage peak controls the energy, or quality, of the beam, so raising kVp produces shorter-wavelength photons that penetrate dense tissue more effectively. Milliamperage and exposure time control the quantity of radiation produced, not its penetrating ability. Source-to-film distance affects beam intensity at the receptor but does not change photon energy.
Luyện 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?
- 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?
- An office still uses film-based intraoral radiography. Which film speed should be selected to keep patient exposure as low as possible?
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