Sonography Principles and Instrumentation - ARDMS SPI Multiple Choice Exam Questions and Answers

Sonography Principles and Instrumentation - ARDMS SPI Multiple Choice Exam Questions and Answers-A mechanical transducer utilizes: a. transmit focus b. receive focus c. fixed focus d. dynamic aperture focusing - c. fixed focus; sonographer cannot determine the location of # of foci. mechanical transducer uses cross sectional imaging, rotating wheel, wobbler, oscillating mirror A reflection will occur at the boundary of two media if the acoustic impedences of the two media are: a. equal b. different c. unchanged d. cannot be predicted - b. different A strongly focused transducer implies a: a. short focal length; decreased beam divergence b. medium focal length; increased beam divergence c. long focal length; no beam divergenc d. short focal length; increased beam divergence - d. short focal length; increased beam divergence All of the following directly affect frame rate except: a. depth of penetration b. field of view c. number of focuses d. line density e. beam width - e. beam width An increase in overall gain will result in all of the following except: a. increase in image brightness b. increase in output power c. increase in amplification of the returning signal d. decrease risk in bioeffects - b. increase in power An increase in packet size will _______ the frame rate - Decrease An increase in red blood cell velocity will__