Which of the following describes the collimator of the panoramic x-ray beam?
A) It is circular (round).
B) It is concentric (cone shaped).
C) It is rectangular.
D) It is a narrow slit.
D
Explanation: A) Unlike the concentric or rectangular beam of x-radiation of intraoral radiography, the x-rays emerge from a narrow vertical slit opening in the tube head and are constricted to form a narrow band.
B) Unlike the concentric or rectangular beam of x-radiation of intraoral radiography, the x-rays emerge from a narrow vertical slit opening in the tube head and are constricted to form a narrow band.
C) Unlike the concentric or rectangular beam of x-radiation of intraoral radiography, the x-rays emerge from a narrow vertical slit opening in the tube head and are constricted to form a narrow band.
D) Unlike the concentric or rectangular beam of x-radiation of intraoral radiography, the x-rays emerge from a narrow vertical slit opening in the tube head and are constricted to form a narrow band.
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Data from NCAA schools indicate that
A. revenues generated by black athletes often pay for scholarships for others. B. less than 10 percent of nearly all scholarships are divided between two or more athletes. C. the sport offering the best scholarship odds to HS seniors is football. D. most scholarships are awarded to students from low income families.