Reflection Ultrasound Tomography Using Localized Freehand Scans
Speed of sound (SOS) is a biomarker that aides clinicians in tracking the onset and progression of diseases such as breast cancer and fatty liver disease. In this paper, we propose a framework to generate accurate, 2D SOS maps with a commercial ultrasound probe. We simulate freehand ultrasound probe...
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Published in | 2020 IEEE 17th International Symposium on Biomedical Imaging (ISBI) pp. 316 - 320 |
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Main Authors | , , , |
Format | Conference Proceeding |
Language | English |
Published |
IEEE
01.04.2020
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Abstract | Speed of sound (SOS) is a biomarker that aides clinicians in tracking the onset and progression of diseases such as breast cancer and fatty liver disease. In this paper, we propose a framework to generate accurate, 2D SOS maps with a commercial ultrasound probe. We simulate freehand ultrasound probe motion and use a multi-look framework for reflection travel time tomography. In these simulations, the "measured" travel times are computed using a bent-ray Eikonal solver and direct inversion for compressional speed of sound is performed. We have shown that the assumption of straight rays breaks down for large velocity perturbations (greater than 1 percent). The error increases 70 fold for a velocity perturbation increase of 1.5 percent. Moreover, the use of multiple looks greatly aides the inversion process. Simulated RMSE drops by roughly 15 dB when the maximum scanning angle is increased from 0 to 45 degrees. |
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AbstractList | Speed of sound (SOS) is a biomarker that aides clinicians in tracking the onset and progression of diseases such as breast cancer and fatty liver disease. In this paper, we propose a framework to generate accurate, 2D SOS maps with a commercial ultrasound probe. We simulate freehand ultrasound probe motion and use a multi-look framework for reflection travel time tomography. In these simulations, the "measured" travel times are computed using a bent-ray Eikonal solver and direct inversion for compressional speed of sound is performed. We have shown that the assumption of straight rays breaks down for large velocity perturbations (greater than 1 percent). The error increases 70 fold for a velocity perturbation increase of 1.5 percent. Moreover, the use of multiple looks greatly aides the inversion process. Simulated RMSE drops by roughly 15 dB when the maximum scanning angle is increased from 0 to 45 degrees. |
Author | Fincke, Jonathan R. Ely, Gregory Anthony, Brian W. Benjamin, Alex |
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Snippet | Speed of sound (SOS) is a biomarker that aides clinicians in tracking the onset and progression of diseases such as breast cancer and fatty liver disease. In... |
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SubjectTerms | localized reflection sound speed tomography travel-time ultrasound |
Title | Reflection Ultrasound Tomography Using Localized Freehand Scans |
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