Efficient and Flexible Spatiotemporal Clutter Filtering of High Frame Rate Images Using Subspace Tracking

B. S. Generowicz, G. Leus, S. Soloukey Tbalvandanv, W. S. Van Hoogstraten, C. Strvdis, J. G. Bosch, A. F.W. Van Der Steen, C. I. De Zeeuwl, S. K.E. Koekkoek, P. Kruizinga

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

2 Citations (Scopus)
41 Downloads (Pure)


Current methods to measure blood flow using ultrafast Doppler imaging often make use of a Singular Value Decomposition (SVD). The SVD has been shown to be an effective way to remove clutter signals associated with slow moving tissue. Conventionally, the SVD is calculated from an ensemble of frames, after which the first dominant eigenvectors are removed. The Power Doppler Image (PDI) is then computed by averaging over the remaining components. The SVD method is computationally intensive and lacks flexibility due to the fixed ensemble length. We propose a method, based on the Projection Approximation Subspace Tracking (PAST) algorithm, which is computationally efficient and allows us to sequentially estimate and remove the principal components, while also offering flexibility for calculating the PDI, e.g. by using any convolutional filter. During a functional ultrasound (fUS) measurement, the intensity variations over time for every pixel were correlated to a known stimulus pattern. The results show that for a pixel chosen around the location of the stimulation electrode, the PAST algorithm achieves a higher Pearson correlation coefficient than the state-of-the-art SVD method, highlighting its potential to be used for fUS measurements.

Original languageEnglish
Title of host publication2018 IEEE International Ultrasonics Symposium, IUS 2018
EditorsKen-ya Hashimoto , Clemens Ruppel
Number of pages4
ISBN (Electronic)978-153863425-7
Publication statusPublished - 2018
Event2018 IEEE International Ultrasonics Symposium, IUS 2018 - Portopia Hotel, Kobe, Japan
Duration: 22 Oct 201825 Oct 2018


Conference2018 IEEE International Ultrasonics Symposium, IUS 2018
Abbreviated titleIUS 2018

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.


  • clutter filter
  • Doppler imaging
  • functional ultrasound
  • subspace tracking


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