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MR acoustic radiation force imaging: In vivo comparison to ultrasound motion tracking
Author(s) -
Huang Yuexi,
Curiel Laura,
Kukic Aleksandra,
Plewes Donald B.,
Chopra Rajiv,
Hynynen Kullervo
Publication year - 2009
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.3120289
Subject(s) - ultrasound , transducer , materials science , acoustic radiation force , biomedical engineering , medical imaging , ultrasound imaging , match moving , tracking (education) , acoustics , medicine , physics , radiology , motion (physics) , psychology , pedagogy , classical mechanics
MR acoustic radiation force (ARF) imaging was developed for measuring tissue elastic properties using focused ultrasound to deliver a localized tissue motion. In this study, an imaging ultrasound transducer was mounted on the focused ultrasound transducer and ultrasound motion tracking was performed simultaneously to MR ARF imaging to validate the measurement results. In vivo studies on rabbit thigh muscle were performed and results showed a general agreement between the two modalities ( slope = 0.96 andR 2 = 0.67 ). The temporal information by the ultrasound measurement indicates that the parameters in MR ARF imaging should be optimized according to the tissue type, acoustic power, and envelope and frequency of the ARF modulation.