Motion artifact reduction by ECG gating in ultrasound induced thermal strain imaging

K. Kim, S. W. Huang, R. Olafsson, C. Jia, R. S. Witte, M. O'Donnell

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Scopus citations


Cardiac motion related artifact in ultrasound induced thermal strain imaging (TSI) was reduced in-vitro and in-vivo using ECG gating. Tissue motion due to the heart beat is a major challenge for in-vivo TSI application, especially for cardiovascular systems. Temporal variation of the relative position between the transducer and the artery will induce decorrelation in speckle tracking. Tissue deformation produces mechanical strains directly. Thermal strains are equivalent to their motion-induced mechanical counterparts and are typically an order of magnitude smaller. Consequently, effective reduction of motion artifacts is critical for clinical use of TSL Using ECG signals to trigger array firing, cardiac periodicity can be fully utilized to minimize motion artifacts, allowing thermal strains to accumulate over multiple cardiac cycles with little distortion. TSI gated by the lumen pressure signal on an artery phantom (rubber) connected to a pulsatile pumping system compares well with TSI when the phantom was immobile for the same heating/imaging sequences. An in-vivo test was performed on a rabbit femoral artery under local animal protocol. The animal's ECG gated a similar pulse sequence used for the phantom. The in-vivo temperature rise in the femoral arterial wall was also estimated. This estimation is well above the background noise in TSI due to speckle tracking error or/and any possible residual vibration. Breathing motion artifacts can be minimzed in the clinic through a breath hold.

Original languageEnglish (US)
Title of host publication2007 IEEE Ultrasonics Symposium Proceedings, IUS
Number of pages4
StatePublished - 2007
Event2007 IEEE Ultrasonics Symposium, IUS - New York, NY, United States
Duration: Oct 28 2007Oct 31 2007

Publication series

NameProceedings - IEEE Ultrasonics Symposium
ISSN (Print)1051-0117


Other2007 IEEE Ultrasonics Symposium, IUS
Country/TerritoryUnited States
CityNew York, NY


  • Atherosclerosis
  • Cardiovascular
  • ECG gating
  • Thermal strain
  • Ultrasound induced thremal strain

ASJC Scopus subject areas

  • Acoustics and Ultrasonics


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