With digital imaging systems, the primary factors affecting final image contrast are the
a. window level and brightness.
b. histogram and look-up-table (LUT).
c. EI numbers and grid ratio.
d. kVp and mAs.
b. histogram and look-up-table (LUT).
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While assessing a patient with acute abdominal pain, you note that his abdomen is very rigid. When asked to relax his stomach muscles, he does. The EMT would recognize:
A) voluntary guarding. B) rebound guarding. C) false guarding. D) involuntary guarding.
Which of the following are typical of high-frequency external chest wall compression therapy? 1. 30-min therapy sessions 2. Long inspiratory oscillations 3. One to six sessions per day 4. Oscillations at 20 to 25 Hz
a. 1 and 3 only b. 1, 2, and 3 only c. 3 and 4 only d. 2, 3, and 4 only
The bed ladder, including the nested fly sections, is raised out of the bed of the apparatus through the use of ____ pistons.
A. hydraulic B. pneumatic C. turntable D. floating
Epinephrine is released by the:
a. anterior pituitary b. adrenal cortex c. adrenal medulla d. pancreas