Radiographic TechniqueCâu 53 / 100
A panoramic radiograph shows a dark radiolucent band across the apices of the maxillary teeth. What instruction was missed?
a.The patient should place the tongue firmly against the roof of the mouth during the exposure
b.The patient should breathe deeply throughout the exposure
c.The patient should close the eyes during the exposure
d.The patient should hold the receptor with both hands
Giải thích
A dark band over the maxillary apices is the palatoglossal air space, which appears when the tongue is not pressed against the palate and air is trapped between them. Deep breathing increases motion artifact rather than preventing this shadow. Closing the eyes has no radiographic effect, and panoramic receptors are held by the machine, never by the patient.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
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