Siemens workshop extends knowledge of tissue elasticity and strain
22 February 2010
Over 270 sonographers and consultants joined together recently
to extend knowledge and understanding of acoustic radiation force
imaging (ARFI) and elasticity imaging techniques. A Siemens Healthcare
workshop at Euroson 2009 provided the platform for the discussion.
One of the topics of discussion was Siemens’ Virtual Touch
application on the Acuson S2000 ultrasound system. Adding a new
parameter to diagnostic ultrasound information, Virtual Touch is the
first commercially available implementation of ARFI.
Interrogating the mechanical strain properties or stiffness of
tissue, ARFI is highly beneficial for deep tissue imaging, including
the liver. The accuracy it achieves with deep tissue also makes it
ideal for larger patients and has the potential to reduce biopsies
by providing a greater level of information in one examination.
The application uses an acoustic ‘push pulse’ sequence to
compress tissue and to create a relative stiffness map for any
region of interest. Its tissue quantification feature is the only
application to provide a numerical value of shear wave speed related
to tissue stiffness at a precise anatomical location.
Elasticity imaging gauges how much tissue moves when pushed, so
that it can detect how soft or stiff an object is. Made possible by
the eSie Touch feature on the S2000 ultrasound, elasticity imaging
is an emerging technique that has the potential to reduce the number
of biopsies carried out by detecting benign lesions with greater
“Innovations in tissue imaging are changing the way we use
ultrasound and these emerging techniques mark an exciting milestone
in the development of this modality,” said Declan Dunphy, Ultrasound
Product Manager at Siemens Healthcare.
Euroson 2009, the annual meeting of the European Federation of
Societies for Ultrasound in Medicine and Biology (EFSUMB), was held
in conjunction with the British Medical Ultrasound Society (BMUS)
Annual Scientific Meeting from 6-8 December 2009.