SPI Exam TEST| 120 QUESTIONS| WITH COMPLETE SOLUTIONS

All of the following are AIUM recommendations regarding the use of ultrasound, except: A. Always adhere to the ALARA principle when scanning B. Limit the examination time to the shortest time necessary to complete a diagnostic exam C. In order to limit ultrasound intensity, always use PW Doppler instead of M-mode to evaluate the fetal heart D. Limit ultrasound exposure to patients that require an examination for a specific reason CORRECT ANSWERS: C. In order to limit ultrasound intensity, always use PW Doppler instead of M-mode to evaluate the fetal heart. Feedback: PW Doppler techniques use the highest intensity of ultrasound when compared to other techniques. (M-mode, color, 2D) As you are performing an exam on an obese patient, you notice a 12 Thermal Index. What should be done next? A. Take a break from scanning the patient for 30-60 seconds and then start again while monitoring the TI level. B. Reduce the output power and increase the gain compensation. C. Stop the exam and consult the radiologist regarding increased patient exposure. D. Reduce the number of images obtained to significantly reduce exam time. CORRECT ANSWERS: B. Reduce the output power and increase the gain compensation. FeedBack: The Tl levels should stay below 1 whenever possible. Tissue heating of 1 degree will occur at Tl levels of 1. Tissue damage will occur when greater than a 2 degree increase in temperature occurs. To reduce the Tl levels, reduce the output power and increase the gain compensation. If these changes do NOT reduce the Tl to an appropriate level and provide adequate images, then the protocol should be minimized to reduce exposure. Always make system adjustments first before choosing to perform a limited exam. All Of the following are coupling agents or mediums typically used for US exams, except: A. water B. KY jelly C. gastrografin D. ultrasonic gel CORRECT ANSWERS: C. gastrografin Feedback: Gel and KY jelly can be used in most all ultrasound exams. Some exams use water as a "window" to evaluate adjacent structures (prostate). Gastrografin is a contrast material normally used in radiology procedures. ______________ refers to redirection of a portion of the US beam from a boundary. A. rarefaction B. refraction C. reflection D. absorption CORRECT ANSWERS: C. reflection FeedBack: Refraction is a bending of the t