Radiographic TechniqueCâu 41 / 100
Films from one box consistently appear gray with poor contrast, even on unexposed control films. What is the most likely explanation?
a.The vertical angulation was too steep
b.The patient was not wearing a lead apron
c.The PID was too long
d.Film fog from a light leak, scatter radiation, or outdated or improperly stored film
Giải thích
Overall grayness with reduced contrast, including on unexposed control films, is classic fog caused by stray light in the darkroom, storage near a radiation source, heat and humidity, or expired film. Angulation errors distort shape, not overall density and contrast. The lead apron does not affect the image, and a longer PID improves sharpness rather than causing fog.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
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