CT Test 1 Mosby Questions with correct answers

A. patient radiation dose Automatic tube current modulation (ATCM) programs adjust the mA throughout an acquisition to reduce patient radiation dose to a minimum. ATCM automatically alters the applied mA on the basis of a predetermined noise index that is acceptable for appropriate image quality. CORRECT ANSWER-Automatic tube current modulation (ATCM) software is used in current multidetector CT (MDCT) systems to control: C. 25 - 35 seconds Partial thromboplastin time (PTT) is a laboratory measure of blood coagulation. This value is used to screen patients for invasive procedures. Because of individual laboratory practices, the average range may fluctuate slightly. CORRECT ANSWER-An average range for activated partial thromboplastin time (PTT) is: B. 15 degrees CORRECT ANSWER-Which of the following is the correct angle of insertion for placing a butterfly needle into a vein for intravenous administration of a contrast agent? D. 2.5 mL/sec Flow rate calculated by dividing the total contrast volume by the time of the injection.