A quality-guided displacement tracking algorithm for ultrasonic elasticity imaging

Chen, Lujie; Treece, Graham M.; Lindop, JE; Gee, Andrew H.; Prager, Richard W.

doi:10.1016/j.media.2008.10.007

Cited by 72 publications

(71 citation statements)

References 32 publications

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“…Individual windows are matched in a 3D search within the reference sweep, using a multiscale exhaustive search for the peak correlation value (as used in [4]). Displacement continuity is enforced within the frame by using a quality guided matching process [5]. The window location estimates are then processed by a Random Sample Consensus (RANSAC) algorithm [9] to exclude outliers, further enforcing continuity.…”

Section: Methodsmentioning

confidence: 99%

A New Method for the Acquisition of Ultrasonic Strain Image Volumes

Housden¹,

Chen²,

Gee³

et al. 2011

Ultrasound in Medicine & Biology

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This paper presents a new method for acquiring 3D volumes of ultrasonic axial strain data. The method uses a mechanically-swept probe to sweep out a single volume while applying a continuously varying axial compression. We examine the image quality and ease of use of the new method with in vitro and in vivo experiments. The new method is easier to use than the current best alternative and so more reliably produces images of superior quality.

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Section: Methodsmentioning

confidence: 99%

A New Method for the Acquisition of Ultrasonic Strain Image Volumes

Housden¹,

Chen²,

Gee³

et al. 2011

Ultrasound in Medicine & Biology

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“…A large residual indicates that the displacement is not accurate and therefore its influence on the next line should be small, which is realized via the small weight β l . This is, in principle, similar to guiding the displacement estimation based on a data quality indicator [48]. The effect of the tunable parameters α, β a and β l is studied in the Results section.…”

Section: D Analytic Minimization (Am)mentioning

confidence: 97%

Ultrasound-Based Guidance for Partial Breast Irradiation Therapy

Rivaz¹

2011

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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. (From -To) 1 Jan 2010 -31 Dec 2010 REPORT DATE 1-JAN-2011 REPORT TYPE Annual Summary DATES COVERED TITLE AND SUBTITLE Ultrasound PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)Johns Hopkins University AND ADDRESS(ES) PERFORMING ORGANIZATION REPORT NUMBERBaltimore MD 21218 SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSOR/MONITOR'S ACRONYM(S) U.S. Army Medical Research and Materiel CommandFort 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 addition, 2D AM produces high quality strain images in 2D which can be used for elasticity reconstruction using an inverse problem framework. We also propose a novel strain calculation technique using Kalman filters, which generates smooth strain images without blurring the images 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 press for IEEE TMI. We have also introduced a novel elastography technique, which uses multiple images to calculate elasticity image. A manuscript has been submitted to IEEE TMI. 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 lumpe...

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“…A large residual indicates that the displacement is not accurate and therefore its influence on the next line should be small, which is realized via the small weight . This is, in principle, similar to guiding the displacement estimation based on a data quality indicator [48]. The effect of the tunable parameters and is studied in Section III.…”

Section: D Analytic Minimization (Am)mentioning

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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A quality-guided displacement tracking algorithm for ultrasonic elasticity imaging

Cited by 72 publications

References 32 publications

A New Method for the Acquisition of Ultrasonic Strain Image Volumes

A New Method for the Acquisition of Ultrasonic Strain Image Volumes

Ultrasound-Based Guidance for Partial Breast Irradiation Therapy

Ultrasound-Based Guidance for Partial Breast Irradiation Therapy

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