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Physics Test 2

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ACR (American college of radiology)   show
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show How many times a year does the ACR accredit the labs?  
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True (helpful by heating muscles)   show
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Grayscale, scattering, and attenuation (but test objects do not)   show
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show True or false, test objects test the beam profile  
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show True or false, sonographers can use phantoms  
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Graphite filled aqueous gel or urethane rubber materials which are closest to soft tissue attenuation and propagation speed   show
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show What is the propagation speed in gels?  
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show What can TE phantoms evaluate?  
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testing of detail and contrast resolutions, penetration (depth), dynamic range, and TGC operation   show
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show True or false, test objects stimulate tissue characteristics  
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show What does doppler test object tests?  
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gas bubbles   show
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show What measures output?  
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show What are hydrophones made out of?  
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Anything that deals with pulse; PRP, PRF, PD, duty factor, amplitude, & intensity   show
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show What does the calorimeter measure?  
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Automated probe tester   show
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show The science of identifying and measuring the characteristics of an ultrasound beam that are relevant to bioeffects  
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"cause and effect"   show
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"exposure and response"   show
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show What does ALARA stand for  
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show What do they test cavitation on  
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In vivo   show
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In virto   show
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focused   show
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1W/cm2   show
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100 mW/cm2 (.1 watt)   show
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show (MI) No bioeffects with peak rare fractional pressures below ________  
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show What is attenuation primarily due to  
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show Temperature rises are significant if they exceed _____ degrees C  
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show What part of the body has highest absorption coefficient  
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50   show
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Cavitation   show
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show What type of cavitation describes bubbles that oscillate in diameter  
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Transient   show
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MI (mechanical index)   show
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show When does cavitation occur  
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FDA   show
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show Who makes the statements about prudent use of diagnostic ultrasound that benefits outweighs the risk, if any, to be present  
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show Ultrasound should only be used when there is a clinical benefit, true or false?  
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show A branch of medicine that uses population studies  
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Spectral doppler are the highest, then M mode and color doppler, and grayscale outputs are the lowest   show
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