The expiration date manufacturers place on radiograph film boxes indicates that films:
a. should not be used for patient exposures after this date.
b. may be safely used for one additional month after this date.
c. may be safely used for a 6-month period after this date.
d. may be used safely after performing a quality control test.
a. Radiographic film past the expiration date is more likely to be fogged and therefore not suitable for producing diagnostic patient radiographs.
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Agents that are bronchodilators and leukotriene receptor antagonists are known as:
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By what age do most patients with Duchenne muscular dystrophy die?
a. 10 years b. 20 years c. 35 years d. 50 years
Twisted, dilated veins that are usually seen in the legs are called ________ veins.
Fill in the blank(s) with the appropriate word(s).
In which of the following conditions would a ventilation scan be normal but a perfusion scan reveal areas of absent blood flow?
A. lung cancer B. pulmonary embolism C. pneumonia D. emphysema