SPI Jim Review Exam Questions & Answers

SPI Jim Review Exam Questions & Answers-which of the following will produce a duplicate artifact? rarefaction rectification refraction reflection - refraction which of the following is associated with a low frequency pulsed wave Doppler? thick PZT crystal thin PZT crystal wide diameter crystal large diameter crystal - thick PZT crystal which artifact will mimic an aortic dissection? propagational speed error artifact grating lobe artifact side lobe artifact mirror imaging artifact - side lobe artifact increasing the number of acoustic scan lines in one frame improves which of the following? axial resolution lateral resolution temporal resolution contrast resolution - lateral resolution when you see spectral broadening, this means what? gain is too high frequency is too high swept gain is too high wall filter is too high - gain is too high what do you adjust if you have very faint reflections displayed on your 2D image? swept gain threshold dynamic range gain - threshold when you see spectral broadening, this means what? wall filter is too low sampling gate is off center swept gain is too high PRF is too high - sampling gate is off center which safety consideration protects patients from transducer exposure? OSHA ALARA JCAHO AIUM - ALARA if an image shows two vessels, with one vessel completely void of color and another filled with color, what's the problem? map scale baseline frequency - scale which transducer produces a wedge shaped sector? sequential convex linear vector - vector an annular phased array uses what to steer the beam? discs rings motor it's electronically steered - motor what is inertia and what does it describe? energy in a system never changes but may change to a different form that describes attenuation flow is equal to the difference in pressure in a vessel that describes resistance and flow increase in velocity must be accompanied by a corresponding decrease in pressure that describes stenotic flow an object in motion stays in motion until acted upon an external force and describes the density of a media - an object in motion stays in motion until acted upon an external force and describes the density of a media