MR acoustic radiation force imaging: In vivo comparison to ultrasound motion tracking

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...

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Bibliographic Details
Published in:Medical physics (Lancaster) 2009-06, Vol.36 (6), p.2016-2020
Main Authors: Huang, Yuexi, Curiel, Laura, Kukic, Aleksandra, Plewes, Donald B., Chopra, Rajiv, Hynynen, Kullervo
Format: Article
Language:English
Subjects:
acoustic radiation force
Acoustical measurements
Animals
biomechanics
biomedical measurement
biomedical MRI
biomedical transducers
biomedical ultrasonics
Elastic properties
elasticity
Elasticity Imaging Techniques - methods
elastography
focused ultrasound
frequency modulation
Image Interpretation, Computer-Assisted - methods
local harmonic motion
Magnetic resonance
Magnetic resonance imaging
Magnetic Resonance Imaging - methods
Medical diagnosis with acoustics
Medical imaging
Medical magnetic resonance imaging
Movement - physiology
muscle
Muscle, Skeletal - anatomy & histology
Muscle, Skeletal - diagnostic imaging
Muscle, Skeletal - physiology
Muscles
Rabbits
Reproducibility of Results
Sensitivity and Specificity
tissue displacement
Tissue engineering
Tissue Measurements
Transducers
ultrasonic focusing
ultrasonic measurement
ultrasonic transducers
Ultrasonography
Ultrasonography - methods
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Description
Summary: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 and R 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.
ISSN:0094-2405
2473-4209
0094-2405
DOI:10.1118/1.3120289