Graininess of a radiographic image results from:
a. large silver halide crystals.
b. the addition of radiosensitive dyes.
c. a decrease in film speed.
d. film packets that contain two films.
a. The larger crystals used in high-speed (fast) film result in a certain amount of graininess that reduces the sharpness of the radiographic image. It has been determined that this slight loss of image sharpness does not interfere with diagnosis and is tolerated because of the reduction in patient radiation exposure.
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When performing water flow analysis the residual pressure should drop at least ___ percent below the static pressure
A. 2 B. 5 C. 10 D. 20
The reason a patient's record should not be sent by fax machine is that ____.
A. copies from a fax machine are difficult to read B. there is no way to tell who will see the document C. it takes too long to fax each page D. fax machines are unreliable E. the digital transmission from a fax machine can be corrupted
Which of the following is NOT part of the male reproductive system?
a. Epididymis b. Testes c. Vas deferens d. Corpus luteum
The scientific "gold standard" of observational study designs in epidemiology is known as the _______________ study.
Fill in the blank(s) with the appropriate word(s).