michael andre, ph.d. research interestsreference phantom roi average power spectrum of par%cipant...
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Michael Andre, Ph.D. Research Interests
• Quan%ta%veUltrasoundBacksca3erTissueCharacteriza%on
• DiagnosisandGradingofNon-AlcoholicFa3yLiverDisease• Quan%ta%veCharacteriza%onofBreastMasses• LiverMasses• Pre-TermCervix
• UltrasoundInverse-Sca3erComputedTomography• BreastUltrasoundComputer-AidedDiagnosis• ObserverPerformanceStudies(ROC)• Quan%ta%veX-RayComputedTomography
Non-AlcoholicFa-yLiverDisease(NAFLD)Leadingcauseofchronicliverdisease(USA:21-50%adults,17%children)
Steatosis->Steatohepa%%s->Fibrosis->Cirrhosis->Carcinoma
CUS:Highreadervariability,operatordependent,lowsensi%vityatearlystages
ReferenceStandards:• Biopsy• MRI-PDFF• ClinicalUS
Normal Severesteatosis
Par>cipant’sLiver
ROI
ReferencePhantom
ROI
AveragePowerSpectrumofPar%cipant
AveragePowerSpectrumofReferencePhantom
RawRFsignalfromtransducer
ROI(windowfunc>on)
(a.) (b.)
(c.)
QUS
CompareQUStoMRIPDFFDefineNAFLDasPDFF≥5%BSC,AChighlycorrelated
BothaccuratelydiagnoseNAFLDAUC=0.98(BC),0.89(AC)
Sound Speed
Reflection
Coronal
Sonogram
MG
Ultrasound CT
MIP
Coronal T1
SONOGRAM
MRI
Infiltrating Ductal CA