Conference Presentations

2025

2025 IEEE International Ultrasonics Symposium (IUS), Utrecht, Netherlands, 15th-18th Sept. 2025. 

  • Chandra, A., and Mercado-Shekhar, K.P., “Viscoelasticity imaging of muscle-mimicking phantoms and ex vivo goat muscle using automated fiber pennation angle estimation with angle-adaptive shear wave directional filters,” (lecture presentation).
  • Patil, J.M., Dharvia, A., Raval, V., and Mercado-Shekhar, K.P., “Differentiating benign and malignant ocular choroidal tumors using
    Nakagami and Burr envelope statistics,” (lecture presentation).
  • Singh, A.K.Shekhar, H., et al. “Accelerating total focusing method with pth root delay and sum and nth coherence factor weighted delay and sum using sparse arrays: A comparative study” (poster presentation).

  • Singh, A.K., Shekhar, H., et al. “Enhancing passive cavitation imaging nth coherence factor weighted delay and sum integreate: A comparative study” (poster presentation).

  • Sahshong, P., Chandra, A., Mercado-Shekhar, K.P., and Bhatt, M. “Improvement in Phase Velocity Reconstruction Using Attention
    Based Deep Denoising of Shear Wave Velocity Fields”  (poster presentation).

  • Das, A., Sahshong, P., Chandra, A., Mercado-Shekhar, K.P., and Bhatt, M. “Shear wave dispersion estimation using deep learning with a
    multi-frequency approach” (poster presentation).

25th Annual International Symposium on Therapeutic Ultrasound (ISTU), Banff, Canada, 19th-22nd June 2025. 

  • Shekhar, H., Trivedi, V., Singh, A.K., Wallach, E., Basterrechea, K.F., and Bader, K.B. “Advancing active and passive imaging techniques for histotripsy monitoring” (*invited lecture presentation).

  • Mistry, N., Dhawan, R., KS, M.,  Shekhar, H., and Mercado-Shekhar, K.P. “Coating perfluorohexane nanodroplets with gold nanoparticles reduces the vaporization pressure threshold,” (lecture presentation).

  • KS, M., Ramesh, H., Jahankir, M.J.B., Kumar, D., Mercado- Shekhar, K.P., and Shekhar, H. “Shape modification of ex-vivo cartilage using focused ultrasound: A feasibility study,” (poster presentation). 

  • KS, M., Hegde, R., and Shekhar, H. “Improving cavitation detection using a metallic metamaterial acoustic filter” (poster presentation).

  • Singh, A.K.Basterrechea, K.F., Bader, K.B., and Shekhar, H. “Passive cavitation imaging using compressed sensing with pth root beamforming: Evaluation for monitoring histotripsy” (poster presentation)

    2024

    187th Meeting of the Acoustical Society of America, 18th-22nd November 2024

    • Shekhar, H., Trivedi, V., Wallach., E. , Basterrechea, K. F., Bader, K. B., “Evaluation of nonlinear imaging strategies for histotripsy monitoring,” (lecture presentation).

    Rochester Center of Biomedical Ultrasound Symposium, Rochester, NY, USA, 12th November 2024

    • Mercado-Shekhar, K.P., “Enabling ultrasound techniques for tissue characterization” *Distinguished RCBU Alumni Lecture*

    International Tissue Elasticity Conference (ITEC), Lyon, France, October 2024.

    • Bisht, S.R., Marri, B.P., and Mercado-Shekhar, K.P., “Elucidating the effect of fluid content on model-free elastography estimates using viscoelastic phantoms,” (lecture presentation).

    2024 IEEE Ultrasonics, Ferroelectrics, and Frequency Control Joint Symposium (UFFC-JS), Taipei, Taiwan, 22nd-26th Sept. 2024.

    • Singh, A.K., Shekhar, H. “Accelerating Total Focusing Method Using Sparse Arrays with Modified Coherence Factor Weighting for Non destructive Testing”  (lecture presentation)

    • Chandra, A., and Mercado-Shekhar, K.P. “Evaluation of a Mechanical Vibration System with Two End-Effectors for Longitudinal Shear Wave Viscoelastography: Simulations and In Vitro Studies Using Anisotropic Phantoms,” (poster presentation).

    • Patil, J.M., Rao, S., Vazhayil, V., Pandya, H.J., Mahadevan, A., and Mercado-Shekhar, K.P. “Differentiating glioblastoma and normal tissue using Nakagami and Burr distribution analyses of the echo envelope: An ex-vivo study.” (poster presentation).

    23rd Annual International Symposium on Therapeutic Ultrasound, Taipei, Taiwan, 19th-22nd Sept. 2024

    • Jain, S., Agarwal, M., Dhawan, R., Mistry, N., and Shekhar, H. “Suppressing Streak Artifacts in Ultrasound Images during Therapy Guidance by a Hybrid U-Net and Enhanced Masked Autoencoder,” (poster presentation).

    • Dhawan, R., Agarwal, M., Jain, S., Ruparel, H.V., and Shekhar, H. “Reconstruction of Ultrasound Super-Resolution Images using a Hybrid Attention-based U-Net Architecture applied to sparse data.” (poster presentation).

    • Singh, A.K. and Shekhar, H. “Effect of therapy pulse duration on passive cavitation imaging performance in silico”, (poster presentation) 

    186th Meeting of the Acoustical Society of America, Ottawa, Quebec, Canada, 8th-12th May 2024.

    • Mistry, N., Dhawan, R., and Mercado-Shekhar, K.P. “Gold Nanoparticle-Coating Reduces Acoustic Pressure Threshold for Nanodroplet Vaporization,” (lecture presentation).

    • Khan, A., Bisht, S., Mistry, N., Mercado-Shekhar, K.P., and Dalvi, S. “Ultrasound Responsive Multi-Layered Emulsions for Drug Delivery,” (lecture presentation).

    • Mercado-Shekhar, K.P. “Learnings from developing a Scientific Writing Certification program at IIT Gandhinagar,” (lecture presentation).

    2024 IEEE Latin American Ultrasonics Symposium (LAUS), Montevideo, Uruguay, 8th-10th May 2024.

    • Nair, H., and Mercado-Shekhar, K.P. Ultrafast Doppler ultrasound for assessing blood perfusion in the foot: A feasibility study,” (lecture presentation).

    2024 IEEE South Asian Ultrasonics Symposium (SAUS), Gandhinagar, India, 27th-29th March 2024.

    • Bisht, S.R., Marri, B.P., and Mercado-Shekhar, K.P., “Characterizing the shear wave attenuation of viscoelastic phantoms,” (lecture  presentation).

    • Chandra, A. and Mercado-Shekhar, K.P., “Effect of fiber orientation on shear wave elastography estimates: In silico and experimental studies using a novel muscle phantom,” (poster presentation).

    • Karmakar, J., Dhawan, R., and Mercado-Shekhar, K.P., “Assessing the confounding effect of vascularity on viscoelastic parameters using shear wave visco-elastography – A phantom study.”

    • Khan, A., Bisht, S.R., Mistry, N., Mercado-Shekhar K.P., and Dalvi S.V., “Ultrasound responsive multi-layered emulsions for drug delivery,” (lecture  presentation). 

    • Mistry, N., Dhawan, R., and Mercado-Shekhar, K.P. “Gold nanoparticle-coating reduces acoustic pressure threshold for nanodroplet vaporization,” (lecture  presentation).

    • KS, M., Bisht, S.R., and Mercado-Shekhar, K.P., “Design and development of a portable, low cost and pure sinusoidal external mechanical vibration system for ultrasound shear wave elastography,” (1st Place, Best Poster Award). 

    • Oza, S.H., Patil, J.M., Raval, V., and Mercado-Shekhar, K.P. “Differentiation of intraocular tumors using Nakagami envelope statistics,” (Best Poster Award Finalist).

    • Patil, J.M., Nair, H., Joshi, P., Murudkar, S., Shekhar, H., and Mercado-Shekhar, K.P. “Characterizing male baldness and female pattern hair loss via scalp and hair testing, and ultrasound envelope statistics: A pilot study,” (3rd Place, Best Poster Award).

    • Paul, A.,  and Mercado-Shekhar, K.P., “Quantifying the effect of transducer F-number, focal depth, and tissue viscosity on Scholte wave-induced bias in shear wave elastography: A numerical study,” (poster presentation).

    • Singh, A.K., Patil, J.M., and Shekhar, H. “The pth standard deviation factor-weighted delay-and-sum beamforming for needle visualization in B-mode ultrasound images,” (Best Poster Award Finalist).

    • Shekhar, H., Singh, A.K. “Effect of the therapy pulse duration on the performance of passive cavitation imaging: A simulation study” (poster presentation)
      • Das, S., Singh, A. K. and Shekhar, H., “Sparse array implementation of synthetic aperture focusing technique with pth-root beamforming for non destructive testing applications” (poster presentation)

      2023

      2023 IEEE International Ultrasonics Symposium (IUS), Montreal, Canada, 3rd-8th Sept. 2023.

      • Bisht, S.R., Patel, P., Thareja, P., and Mercado-Shekhar, K.P., “Benchmarking Linear and Viscoelastic Shear Wave elastography against rheometry: a phantom study,” (poster presentation).

      • Marri, B., Karmakar, J., Bisht, S.R., and Mercado-Shekhar, K.P. “Shear Wave viscoelastography of Phantoms with Tunable Viscoelastic Properties Fabricated Using a Combination of Low and High Viscosity Polyvinyl Alcohol,” (poster presentation).

      • Patil, J.M., Trivedi, V., Yadav, A., Pandya, H.J., Vazhayil, V., Rao, S., Mahadevan, A., and Mercado-Shekhar, K.P. “Differentiating normal brain tissue and glioblastoma using the integrated backscatter coefficient: An ex vivo study,” (poster presentation).

      • Singh, A.K., Basterrechea,  K. F., Bader,  K. B., Shekhar, H. “Passive Cavitation Imaging Using Pth Root Delay Add Sum beamforming: in vitro and in Vivo Feasibility Assessment for histotripsy Guidance” (poster presentation).

      184th Meeting of the Acoustical Society of America, Chicago, Illinois, U.S.A, 8th-12th May 2023.  

      • Kakkar, M., Patil, J.M., Trivedi, V., Yadav, A., Rao, S., Vazhayil, V., Mahadevan, A., Shekhar, H., and Mercado-Shekhar, K.P. “Evaluating the feasibility of differentiating glioblastoma and normal brain tissue using H-scan imaging: An ex vivo study,” (lecture  presentation).

      • Kaushik, A., Menon, S., and Shekhar, H. “Delayed subharmonic response of a phospholipid-shelled ultrasound contrast agent: Effect of temperature, protein concentration and ambient pressure,” (lecture presentation).

      • Trivedi, V., Wallach, E., Bader, K. B.,  Shekhar, H.  “Contrast- specific imaging of histotripsy: Chirp-coded subharmonic imaging combined with Volterra Filtering,” (lecture presentation).

      Association for Research in Vision and Ophthalmology (ARVO) 2023, New Orleans, LA, U.S.A., 21st-27th April 2023.

      • Raval, V., J. Karmakar, Mercado-Shekhar, K.P., Shekhar, H., and Singh, A. “Quantitative perfusion analysis using contrast-enhanced ultrasound for benign and malignant choroidal tumor,” (poster presentation).

      3rd International Conference on Nanomaterials in Biology (2023). IIT Gandhinagar, India

      • Mistry, N., Dhawan, R., and Mercado-Shekhar, K.P. “Ultrasound-Responsive Gold Nanoparticle-Coated Perfluorocarbon Lipid Nanodroplets as a Potential Carrier for Drug Delivery,” (lecture  presentation).

      2022

      Symposium cum Hands-on Workshop on Medical Imaging, IISER Thruvananthapuram, 20th-22nd October 2022.

      • Bisht, S.R. and Mercado-Shekhar, K.P. “Ultrasound shear wave elastography of viscoelastic tissue-mimicking polyvinyl alcohol phantoms: Comparison with rheometry,” **Won 3rd place best poster (tie).

      • Paul, A. and Mercado-Shekhar, K.P. “A numerical model for acoustic radiation force-induced ultrasound shear wave elastography,” **Won 3rd place best poster (tie).

      • Kakkar, M., Patil, J.M., Vazhayil, V., Rao, S., Mahadevan, A., Shekhar, H., and Mercado-Shekhar, K.P.Evaluation of H-Scan Imaging for differentiating normal brain tissue and glioblastoma brain samples,” (poster presentation).

      • Patil, J.M., Vazhayil, V., Rao, S., Mahadevan, A., and Mercado-Shekhar, K.P.* “Differentiating normal brain tissue and glioblastoma using the integrated backscatter coefficient in ultrasound imaging,” (poster presentation).

      • Nair, H.S. and Mercado-Shekhar, K.P.*. “Ultrafast Doppler ultrasound assessment of perfusion in the foot: A feasibility study in healthy volunteers,” (poster presentation).

      • Trivedi, V., Wallach, E., Bader, K. B.,  Shekhar, H.  “Histotripsy image guidance using subharmonic imaging with chirp-coded excitation and Volterra Filtering,” (poster presentation).
      • Singh, A.K., Shekhar, H. “P-th Root Compression Delay Add Sum Beamforming for Cavitation Imaging: In Vitro Evaluation” (poster presentation).

        IEEE International Ultrasound Symposium, Venice, Italy, October 10-13, 2022.

        • Trivedi, V., Wallach, E., Bader, K. B.,  Shekhar, H.  “Contrast-Enhanced Imaging of Histotripsy Bubble Clouds using Chirp Coded Excitation and Volterra Filtering,” (poster presentation).

        21st Annual International Society on Therapeutic Ultrasound, Toronto, Canada, June 7 – 10, 2022.

        • Trivedi, V., Wallach, E., Bader, K. B.,  Shekhar, H.  “Histotripsy bubble cloud contrast using chirp coded excitation and Volterra filtering,” (poster presentation).

         

        2021

        180th Meeting of the Acoustical Society of America – Acoustics in Focus, Virtual, 8th-10th June 2021.

        • Sharma, A., Marapureddy, S.G., Bisht, S. R., Thareja, P., and Mercado-Shekhar, K.P.. “Viscoelastic polyvinyl alcohol (PVA) phantoms for ultrasound elastography, “ (lecture  presentation).

        • Yadav, A., Trivedi, V., and Mercado-Shekhar, K.P. “Evaluation of H-scan imaging in phantoms and ex vivo tissue,” (lecture  presentation).

        International Symposium on Ultrasound Imaging and Tissue Characterization (UITC), Virtual, 2nd – 4th June 2021.

        • Sharma, A., Marapureddy, S.G., Thareja, P., and Mercado-Shekhar, K.P.* “Characterization of the viscoelastic properties of polyvinyl alcohol (PVA) phantoms for ultrasound elastography,” (lecture presentation).

        International Conference on Formulations in Food and Healthcare (ICFFH), Virtual, 8th-11th March 2021.

        • Sharma, A., Marapureddy, S.G., Thareja, P., and Mercado-Shekhar, K.P.* “Fabrication and characterization of tissue-mimicking viscoelastic polyvinyl alcohol (PVA) phantoms for ultrasound elastography,” (lecture presentation).