2016 AAPM Annual Meeting
Back to session list

Session Title: Shear-wave Imaging and a QIBA US Biomarker Update
Question 1: What are the beneficial features of shear wave elastography compared to strain elastography?
Reference:EFSUMB guidelines and recommendations on the clinical use of ultrasound elastography. Part 2: Clinical applications, Ultraschall Med. 2013 Jun; 34(3):238-53. Tissue elasticity imaging using ultrasound, Applied Radiology, 40(4): 24-30, 2011.
Choice A:Quantitative.
Choice B:Less operator dependent.
Choice C:Can be used on diffuse diseases.
Choice D:All of the above.
Choice E:None of the above.
Question 2: The technical challenge of shear wave elastography includes:
Reference:Two-dimensional shear-wave elastography on conventional ultrasound scanners with time-aligned sequential tracking (TAST) and comb-push ultrasound shear elastography (CUSE). IEEE Tran Ultrason Ferroelectr Freq Control. 2015 Feb; 62(2): 290-302. 
Choice A:Fast attenuation of shear wave.
Choice B:Low detection frame rate of line-by-line scanner.
Choice C:Both A and B.
Choice D:Neither A nor B.
Question 3: What can cause variability in shear wave elastography measurements?
Reference:WFUMB guidelines and recommendations for clinical use of ultrasound elastography: Part 1: basic principles and terminology, Ultrasound Med Biol. 2015 May; 41(5):1126-47.
Choice A:Tissue viscosity.
Choice B:Probe compression.
Choice C:Shear wave reflection at boundaries.
Choice D:All of the above.
Choice E:None of the above.
Question 4: The purpose of QIBA is to find ways of assigning numerical values to subjective radiologist interpretations.
Reference:QIBA WIKI (definition of quantitative biomarker)
Choice A:True.
Choice B:False.
Question 5: A QIBA Profile Contains all of the following except:
Reference:QIBA WIKI – profile description and template
Choice A:A claim of performance.
Choice B:“Actors” – humans assigned to perform various roles outlined in the profile.
Choice C:Specific protocols to be followed for patient handling and data acquisition.
Choice D:A compliance section.
Choice E:Manufacturer specific materials including instructions and specific protocols.
Question 6: The Ultrasound Shear Wave Speed Biomarker Committee Used Visco-elastic phantoms to test:
Reference:QIBA WIKI – profile description and template
Choice A:Variation in shear wave speed caused by varying amounts of pressure applied by operators.
Choice B:Drift in shear wave speed estimates caused by “aging” of the phantoms.
Choice C:Differences in shear wave speed caused by the frequency of the shear waves.
Choice D:Accuracy of shear wave speed for estimation of Young’s modulus.
Back to session list