The time between a 90-degree pulse and the echo during a spin-echo pulse sequence is
a. spin density (r).
b. repetition time (TR).
c. echo time (TE).
d. inversion time (TI).
c. echo time (TE).
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An "E" size cylinder is turned on, and the flowmeter is off. Which of the following is (are) the most likely cause(s) of a hissing sound?
1. A cracked flowmeter 2. Inadequate pressure in the cylinder 3. An obstruction at the regulator outlet 4. A leak in the connection between the yoke and the cylinder opening a. 2 c. 1 and 3 b. 1 and 2 d. 1 and 4
Koplik's spots are tiny buccal mucosal lesions that precede the cutaneous eruption of which of the following diseases?
a. Secondary syphilis b. Pemphigus vulgaris c. Primary herpes simplex labialis d. Behçet's syndrome e. None of the above
Medicaid is always the _________________ payer
a. primary b. secondary c. tertiary d. It depends on the situation.
Which of the drugs below is known as the "date rape drug" due to its depressant qualities?
a) oxycodone b) ritalin c) rohypnol d) valium