Journal article
Comparison of three dimensional strain volume reconstructions using SOUPR and wobbler based acquisitions: A phantom study
Medical physics (Lancaster), Vol.43(4), pp.1615-1626
04/2016
DOI: 10.1118/1.4942814
PMCID: PMC4788604
PMID: 27036561
Abstract
Purpose: Ultrasound strain imaging is a relatively low cost and portable modality for monitoring percutaneous thermal ablation of liver neoplasms. However, a 3D strain volume reconstruction from existing 2D strain images is necessary to fully delineate the thermal dose distribution. Tissue mimicking (TM) phantom experiments were performed to validate a novel volume reconstruction algorithm referred to as sheaf of ultrasound planes reconstruction (SOUPR), based on a series of 2D rotational imaging planes.
Methods: Reconstruction using SOUPR was formulated as an optimization problem with constraints on data consistency with 2D strain images and data smoothness of the volume data. Reconstructed ablation inclusion dimensions, volume, and elastographic signal to noise ratio (SNRe) and contrast to noise ratio (CNRe) were compared with conventional 3D ultrasound strain imaging based on interpolating a series of quasiparallel 2D strain images with a wobbler transducer.
Results: Volume estimates of the phantom inclusion were in a similar range for both acquisition approaches. SNRe and CNRe obtained with SOUPR were significantly higher on the order of 250% and 166%, respectively. The mean error of the inclusion dimension reconstructed with a wobbler transducer was on the order of 10.4%, 3.5%, and 19.0% along the X, Y, and Z axes, respectively, while the error with SOUPR was on the order of 2.6%, 2.8%, and 9.6%. A qualitative comparison of SOUPR and wobbler reconstruction was also performed using a thermally ablated region created in ex vivo bovine liver tissue.
Conclusions: The authors have demonstrated using experimental evaluations with a TM phantom that the reconstruction results obtained with SOUPR were superior when compared with a conventional wobbler transducer in terms of inclusion shape preservation and detectability. (C) 2016 American Association of Physicists in Medicine.
Details
- Title: Subtitle
- Comparison of three dimensional strain volume reconstructions using SOUPR and wobbler based acquisitions: A phantom study
- Creators
- Wenjun Yang - Univ Wisconsin, Sch Med & Publ Hlth, Dept Med Phys, Madison, WI 53705 USAAtul Ingle - University of Wisconsin–MadisonTomy Varghese - University of Wisconsin–Madison
- Resource Type
- Journal article
- Publication Details
- Medical physics (Lancaster), Vol.43(4), pp.1615-1626
- DOI
- 10.1118/1.4942814
- PMID
- 27036561
- PMCID
- PMC4788604
- NLM abbreviation
- Med Phys
- ISSN
- 0094-2405
- eISSN
- 2473-4209
- Publisher
- Wiley
- Number of pages
- 12
- Grant note
- R01CA112192 / NATIONAL CANCER INSTITUTE; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Cancer Institute (NCI) R01 CA112192-08 / NIH-NCI Grant
- Language
- English
- Date published
- 04/2016
- Academic Unit
- Radiation Oncology
- Record Identifier
- 9984697737402771
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