Lateral displacement estimation using tissue incompressibility

Lubinski, M.A.; Emelianov, Stanislav; Raghavan, Kamaldev; Yagle, A.E.; Skovoroda, A.R.; O’Donnell, Matthew

doi:10.1109/58.485950

Cited by 121 publications

(89 citation statements)

References 11 publications

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“…The algorithm used in this paper does not utilize the incompressibility assumption proposed by Lubinski et al (1996). The primary trade-off involves the collection of multiple angular RF data sets using our approach, whereas the Konofagou and Ophir (1998) method uses a single pair of pre-and postcompression echo signal frames.…”

Section: Discussionmentioning

confidence: 99%

“…Elastography is an imaging modality that is based on mapping local internal strains that tissues experience after a quasistatic or dynamic compression. In this technique, strains are typically estimated along the axial direction corresponding to the beam propagation axis by taking the gradient of the tissue displacement following a uniaxial compression (generally in the direction of beam propagation) (Ophir et al 1991 Previous research in the estimation of multidimensional components of the tissue displacement vector for strain imaging has been reported (Lubinski et al 1996;Konofagou and Ophir 1998). Lubinski et al (1996) obtained lateral displacements utilizing assumptions of tissue incompressibility.…”

Section: Introductionmentioning

confidence: 99%

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Normal and shear strain estimation using beam steering on linear-array transducers

Rao

Chen

Shi

et al. 2007

Ultrasound in Medicine & Biology

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In current ultrasound elastography, only the axial component of the displacement vector is estimated and used to produce strain images. A method was recently proposed by our group to estimate both the axial and lateral components of a displacement vector following a uniaxial compression. Previous work evaluated the technique using both simulations and a mechanically translated phased array transducer. In this paper, we present initial results using beam steering on a linear array transducer attached to a commercial scanner to acquire echo signals for estimating 2-D displacement vectors. Single-inclusion and anthropomorphic breast phantoms with different boundary properties between the inclusion and background material are imaged by acquiring echo data along beam lines ranging from −15° to 15° relative to the compression direction. 1-D cross-correlation is used to calculate "angular displacements" in each acquisition direction, yielding axial and lateral components of the displacement vector. Strain tensor components are estimated from these displacements. Features on shear strain images generated for the inclusion phantom agree with those predicted using FEA analysis. Experimental results demonstrate the utility of this technique on clinical scanners. Shear strain tensors obtained using this method may provide useful information for the differentiation of benign from malignant tumors. For the linear array transducer used in this study, the optimum angular increment is around 3°. However, more work is required for the selection of an appropriate value for the maximum beam angle for optimal performance of this technique.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Normal and shear strain estimation using beam steering on linear-array transducers

Rao

Chen

Shi

et al. 2007

Ultrasound in Medicine & Biology

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“…US provides imprecise estimates of the other components of displacements. 23 Our long-term goal is to develop a more quantitative approach to NIVE based on SA imaging-a technique we call quantitative sparse array vascular elastography (qSAVE). SA provides high-precision axial and lateral displacements, 24 but there are concerns that the low transmit power of SA could hamper clinical use.…”

Section: Introductionmentioning

confidence: 99%

Quantitative sparse array vascular elastography: the impact of tissue attenuation and modulus contrast on performance

2014

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Abstract. Quantitative sparse array vascular elastography visualizes the shear modulus distribution within vascular tissues, information that clinicans could use to reduce the number of strokes each year. However, the low transmit power sparse array (SA) imaging could hamper the clinical usefulness of the resulting elastograms. In this study, we evaluated the performance of modulus elastograms recovered from simulated and physical vessel phantoms with varying attenuation coefficients (0.6, 1.5, and 3.5 cm −1 ) and modulus contrasts (−12.04, −6.02, and −2.5 dB) using SA imaging relative to those obtained with conventional linear array (CLA) and plane-wave (PW) imaging techniques. Plaques were visible in all modulus elastograms, but those produced using SA and PW contained less artifacts. The modulus contrast-to-noise ratio decreased rapidly with increasing modulus contrast and attenuation coefficient, but more quickly when SA imaging was performed than for CLA or PW. The errors incurred varied from 10.9% to 24% (CLA), 1.8% to 12% (SA), and ≈4% (PW). Modulus elastograms produced with SA and PW imagings were not significantly different (p > 0.05). Despite the low transmit power, SA imaging can produce useful modulus elastograms in superficial organs, such as the carotid artery. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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“…Axial strain is used in [34] to enhance the quality of lateral displacement estimation. Tissue is assumed to be incompressible and isotropic and therefore axial, lateral and out-of-plane strains should add to zero.…”

Section: Resultsmentioning

confidence: 99%

Ultrasound-Based Guidance for Partial Breast Irradiation Therapy

Rivaz¹

2012

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) 8. PERFORMING ORGANIZATION REPORT NUMBERJohns Hopkins University Baltimore, MD 21218 SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSOR/MONITOR'S ACRONYM(S) U.S. Army Medical Research and Materiel Command Fort Detrick, Maryland 21702-5012 SPONSOR/MONITOR'S REPORT NUMBER(S) DISTRIBUTION / AVAILABILITY STATEMENTApproved for Public Release; Distribution Unlimited SUPPLEMENTARY NOTES ABSTRACTTracked ultrasound elastography can be used for guidance in partial breast radiotherapy by visualizing the hard scar tissue around the lumpectomy cavity. For clinical success, the elastography method needs to be robust to the sources of decorrelation between ultrasound images, specifically fluid motions inside the cavity, change of the appearance of speckles caused by compression or physiologic motions, and out-of-plane motion of the probe. In this report, we extend our previous work where we proposed 1D Analytic Minimization (1D AM) of a cost function to calculate robust elasticity images to 2D AM. We show that 2D AM is much faster than 1D AM, which is critically important in creating real-time elastography. In elasticity reconstruction using an inverse problem framework. We also propose a novel strain addition, 2D AM produces high quality strain images in 2D which can be used for calculation technique using Kalman filters, which generates smooth strain images without blurring theimages and removing sharp boundaries. We show using simulation, phantom and clinical trials that the 2D AM generates high quality strain images in real-time. This work is in published in 2 IEEE TMI articles (23 pages total), and in 5 conference proceeding papers (each paper 8 to 9 pages, 42 pages total). The papers are well received, resulting in more than 55 citations to date according to Google Scholar. SUBJECT TERMS INTRODUCTION:A tracked free-hand ultrasound system is ideal for guiding many radiotherapy procedures, as it can be performed in the treatment room. In partial breast irradiation, the lumpectomy cavity should be localized during the treatment course. While many st...

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Lateral displacement estimation using tissue incompressibility

Cited by 121 publications

References 11 publications

Normal and shear strain estimation using beam steering on linear-array transducers

Normal and shear strain estimation using beam steering on linear-array transducers

Quantitative sparse array vascular elastography: the impact of tissue attenuation and modulus contrast on performance

Ultrasound-Based Guidance for Partial Breast Irradiation Therapy

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