Radiation Health & SafetyCâu 18 / 100
Compared with D-speed film, direct digital sensors generally allow the operator to:
a.Reduce patient exposure time substantially while still obtaining a diagnostic image
b.Skip the lead apron because sensors emit no radiation
c.Use a higher kVp to compensate for the sensor's low sensitivity
d.Eliminate the need for a beam-alignment device
Giải thích
Direct digital sensors are more sensitive than D-speed film, so exposure times and patient dose can be reduced considerably. Sensors do not emit radiation, but the x-ray beam still does, so shielding recommendations remain unchanged. Sensors are highly sensitive rather than insensitive, and beam-alignment devices are still needed to prevent cone cuts and angulation errors.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
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