3D full inverse scattering ultrasound tomography of the human knee (Conference Presentation)

Wiskin, James; Malik, Bilal; Natesan, Rajni; Pirshafiey, Nasser; Klock, John C.; Lenox, M.

doi:10.1117/12.2512595

Cited by 12 publications

(11 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In clinical settings, several works have studied SoS imaging using transmission-mode and water-submerged systems, e.g. for breast tissue classification [17], solid mass differentiation [13], and imaging human-knee [41]. Using conventional transducers in pulse-echo mode, SoS has been studied clinically for quantifying muscle loss [30] and breast density [29], as well as for differential diagnosis of breast can-cer [27].…”

Section: Introductionmentioning

confidence: 99%

Speed-of-sound imaging using diverging waves

et al. 2021

View full text Add to dashboard Cite

Purpose. Due to its safe, low-cost, portable, and real-time nature, ultrasound is a prominent imaging method in computer-assisted interventions. However, typical B-mode ultrasound images have limited contrast and tissue differentiation capability for several clinical applications. Methods. Recent introduction of imaging speed-of-sound (SoS) in soft tissues using conventional ultrasound systems and transducers has great potential in clinical translation providing additional imaging contrast, e.g., in intervention planning, navigation, and guidance applications. However, current pulse-echo SoS imaging methods relying on plane wave (PW) sequences are highly prone to aberration effects, therefore suboptimal in image quality. In this paper we propose using diverging waves (DW) for SoS imaging and study this comparatively to PW. Results. We demonstrate wavefront aberration and its effects on the key step of displacement tracking in the SoS reconstruction pipeline, comparatively between PW and DW on a synthetic example. We then present the parameterization sensitivity of both approaches on a set of simulated phantoms. Analyzing SoS imaging performance comparatively indicates that using DW instead of PW, the reconstruction accuracy improves by over 20% in root-mean-square-error (RMSE) and by 42% in contrast-to-noise ratio (CNR). We then demonstrate SoS reconstructions with actual US acquisitions of a breast phantom. With our proposed DW, CNR for a high contrast tumor-representative inclusion is improved by 42%, while for a low contrast cyst-representative inclusion a 2.8-fold improvement is achieved. Conclusion. SoS imaging, so far only studied using a plane wave transmission scheme, can be made more reliable and accurate using DW. The high imaging contrast of DW-based SoS imaging will thus facilitate the clinical translation of the method and utilization in computer-assisted interventions such as ultrasound-guided biopsies, where B-Mode contrast is often to low to detect potential lesions.

show abstract

Section: Introductionmentioning

confidence: 99%

Speed-of-sound imaging using diverging waves

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Under a fluid or acoustic modeling, the effects of attenuation and shear wave propagation are not taken into account. This simplified model is often used in the imaging of soft tissues in order to reduce the complexity of the implementation, 20 but it has also been extended to targets with high impedance contrast such as bone 21–23 obtaining proper quantitative estimates of the tissue characteristics. To go further, the FWI approach have been proposed as suitable method for USCT of high impedance contrast targets, and the results obtained using synthetic data are promising.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic Imaging of High-contrasted Objects Based on Full-waveform Inversion: Limits under Fluid Modeling

et al. 2021

View full text Add to dashboard Cite

Quantitative ultrasound techniques have been previously used to evaluate biological hard tissues, characterized by a large acoustic impedance contrast. Here, we are interested in the imaging of experimental data from different test-targets with high acoustic impedance contrast, using the Full Waveform Inversion (FWI) method to solve the inverse problem. This method is based on high-resolution numerical modeling of the forward problem of interaction between waves and medium, considering the full time series. To reduce the complexity of the numerical implementation, the model considers a fluid medium. Therefore, the aim is to evaluate the precision of the reconstruction under this assumption for materials with a different level of attenuation of shear waves, to study the limits of this hypothesis. Images of the sound speed obtained using the experimental data are presented, and the precision of the reconstruction is evaluated. Future work should include viscoelastic materials.

show abstract

“…Diffraction-mode USCT is effective for imaging the soft tissues of an organ, for example a breast, for which a fluid-like model is workable, and provides promising benefits [7]. However, USCT can be hampered by the acquisition of a large volume of recorded data, long processing times, or high computation costs, especially for iterative nonlinear approaches [8][9][10][11][12][13][14][15][16][17][18]. The computational cost issue tends to be less limiting nowadays thanks to the continuous increase in the power of computers and high-performance computing systems, so that USCT could become, in the medium term, an interesting modality for complete organ imaging.…”

Section: Introductionmentioning

confidence: 99%

“…Quantitative parametric approaches have been proposed by several groups, but the pre-and postprocessing times are increased [20,21]. Recently, Wiskin et al [15,16] proposed a compound (reflection/transmission) high-frequency (3 MHz), high-energy quantitative USCT, and the results on a complete knee organ, including the skin, the muscle and the bone, were very convincing.…”

Section: Introductionmentioning

confidence: 99%

Reflection-Mode Ultrasound Computed Tomography Based on Wavelet Processing for High-Contrast Anatomical and Morphometric Imaging

et al. 2021

View full text Add to dashboard Cite

Medical B-mode ultrasound is widely used for the examination of children’s limbs, including soft tissue, muscle, and bone. However, for the accurate examination of the bone only, it is often replaced by more restrictive clinical modalities. Several authors have investigated ultrasonic imaging of bone to assess cortical thickness and/or to estimate the wave velocity through the internal structure. The present work focuses on the transverse slice imaging process using reflection-mode ultrasound computed tomography (USCT). The method is valid for imaging soft tissues with similar acoustic impedances, but in the presence of bone, the higher contrasts alter the propagation of ultrasonic waves and reduce the contrast-to-noise ratio (CNR). There is a need to change the methods used for the processing of ultrasonic signals. Our group has developed a wavelet-based coded excitation (WCE) method to process information in frequency and time. The objective of this study is to use the method to improve reflection-mode USCT, at low ultrasonic intensities, to better address organ morphometry. Experimental results on a newborn arm phantom and on an ex vivo chicken drumstick are presented, and the usefulness of this WCE-mode USCT is discussed.

show abstract

3D full inverse scattering ultrasound tomography of the human knee (Conference Presentation)

Cited by 12 publications

References 0 publications

Speed-of-sound imaging using diverging waves

Speed-of-sound imaging using diverging waves

Ultrasonic Imaging of High-contrasted Objects Based on Full-waveform Inversion: Limits under Fluid Modeling

Reflection-Mode Ultrasound Computed Tomography Based on Wavelet Processing for High-Contrast Anatomical and Morphometric Imaging

Contact Info

Product

Resources

About