Publications

Peer-Reviewed Articles

[1] K. Kalayeh, J. B. Fowlkes, W. W. Schultz and B. S. Sack, “Ureterovesical junction deformation during urine storage in the bladder and the effect on vesicoureteral reflux.,” J Biomech, vol. 113, pp. 110123-110121, 2020. https://www.ncbi.nlm.nih.gov/pubmed/33242822

[2] K. Kalayeh, J. B. Fowlkes, W. W. Schultz and B. S. Sack, “The 5:1 rule overestimates the needed tunnel length during ureteral reimplantation,” Neurourol Urodyn, vol. 40, no. 1, pp. 85-94, 2021. https://www.ncbi.nlm.nih.gov/pubmed/33017072

[3] K. Kalayeh, J. B. Fowlkes, J. Claflin, M. L. Fabiilli, W. W. Schultz and B. S. Sack, “Ultrasound Contrast Stability for Urinary Bladder Pressure Measurement.,” Ultrasound Med Biol, vol. 49, no. 1, pp. 136-151, 2023. https://www.ncbi.nlm.nih.gov/pubmed/36244919

[4] K. Kalayeh, J. B. Fowlkes, A. Chen, S. Yeras, M. L. Fabiilli, J. Claflin, S. Daignault-Newton, W. W. Schultz and B. S. Sack, “Pressure Measurement in a Bladder Phantom Using Contrast-Enhanced Ultrasonography-A Path to a Catheter-Free Voiding Cystometrogram.,” Invest. Radiol., vol. 58, no. 3, pp. 181-189, 2023. https://www.ncbi.nlm.nih.gov/pubmed/36070543

[5] K. Kalayeh, H. Xie, J. Brian Fowlkes, B. S. Sack and W. W. Schultz, “Longitudinal wall motion during peristalsis and its effect on reflux,” Journal of Fluid Mechanics, vol. 964, pp. A30, 2023. http://dx.doi.org/10.1017/jfm.2023.363

[6] K. Kalayeh, J. B. Fowlkes, H. Xie, W. W. Schultz and B. S. Sack, “Peristalsis prevents ureteral dilation,” Neurourol Urodyn, 2023. https://www.ncbi.nlm.nih.gov/pubmed/37961019

[7] H. Tai, K. Kalayeh, J. A. Ashton-Miller, J. O. DeLancey and J. Brian Fowlkes, “Urethral tissue characterization using multiparametric ultrasound imaging.,” Ultrasonics, vol. 145, pp. 107481, 2025. https://www.ncbi.nlm.nih.gov/pubmed/39348748

[8] K. Kalayeh, J. B. Fowlkes, B. S. Sack, J. LaCross, S. Daignault-Newton, P. Schmidt, H. Tai, W. W. Schultz, J. A. Ashton-Miller and J. O. DeLancey, “A New Automated Ultrasound Quantification of Urethral Mobility for Stress Urinary Incontinence: A Feasibility Study.,” J Ultrasound Med, 2025. https://www.ncbi.nlm.nih.gov/pubmed/40095237

[9] K. Kalayeh, S. N. Ambani, M. Zhang, S. Daignault-Newton, B. L. Viglianti, R. Mediratta, W. W. Schultz, J. B. Fowlkes and B. S. Sack, “Quantitative Dynamic Contrast-Enhanced Ultrasound Confirms Renal Obstruction: A Feasibility Study.,” J Ultrasound Med, 2025. https://www.ncbi.nlm.nih.gov/pubmed/40197768

Conference Abstracts

[1] K. Kalayeh, J. B. Fowlkes, W. W. Schultz and B. S. Sack, “Urinary Reflux,” Annual Meeting of the APS Division of Fluid Dynamics, 2020. http://meetings.aps.org/Meeting/DFD20/Session/X01.15

[2] K. Kalayeh, J. B. Fowlkes, W. W. Schultz and B. S. Sack, “Dismembering The Ureterovesical Junction: A Computational Analysis Of The 5:1 Ureteral Length-To-Diameter Ratio,” Joint Meeting of ESPU-SPU, 2020. https://congress2021.espu.org/index.html

[3] K. Kalayeh, J. B. Fowlkes, J. Claflin, M. L. Fabiilli, W. W. Schultz and B. S. Sack, “Bladder Pressure Estimation Using Subharmonic Signal Scattered by Ultrasound Contrast Agents,” RSNA Scientific Assembly and Annual Meeting, 2021. https://www.rsna.org/annual-meeting

[4] K. Kalayeh, J. B. Fowlkes, J. Claflin, M. L. Fabiilli, W. W. Schultz and B. S. Sack, “Benchtop Bladder Phantom Pressure Estimation Using Ultrasound Contrast Agents,” Annual Meeting of the North Central Section of the AUA, 2021. https://ncsaua.org/home.aspx

[5] K. Kalayeh, J. B. Fowlkes, J. Claflin, M. L. Fabiilli, W. W. Schultz and B. S. Sack, “Benchtop Bladder Phantom Pressure Estimation Using Ultrasound Contrast Agents,” AUA Annual Meeting, vol. 206(Supplement 3), no. Supplement 3, 2021. http://dx.doi.org/10.1097/ju.0000000000002020.05

[6] K. Kalayeh, J. B. Fowlkes, J. Claflin, M. L. Fabiilli, W. W. Schultz and B. S. Sack, “Application of Lipid-Shell Microbubbles in Cystometrogram–Handling and Bladder Pressure Estimation,” AIUM Annual Meeting, 2022. https://www.eventscribe.net/2022/AIUM2022/

[7] K. Kalayeh, H. Xie, J. B. Fowlkes, W. W. Schultz and B. S. Sack, “Ureteral Peristalsis Longitudinal Motion Minimizes Reflux,” AUA Annual Meeting, vol. 209(Supplement 4), no. Supplement 4, 2023. http://dx.doi.org/10.1097/ju.0000000000003338.04

[8] K. Kalayeh, J. B. Fowlkes, A. Chen, S. Yeras, M. L. Fabiilli, W. W. Schultz and B. S. Sack, “Performance of Commercial Ultrasound Contrast Agents for Bladder Pressure Measurement,” AIUM UltraCon, 2023. https://www.aium.org/

[9] K. Kalayeh, J. B. Fowlkes, P. Schmidt, H. Tai, B. S. Sack, J. A. Ashton-Miller and J. O. DeLancey, “Near Real-Time Automated Quantification of Urethral Mobility During Ultrasound Imaging,” AUGS PFD, 2023. https://www.eventscribe.net/2023/PFDWeek/

[10] K. Kalayeh, H. Xie, J. B. Fowlkes, W. W. Schultz and B. S. Sack, “Ureteral Wall Longitudinal Motion During Peristalsis Restricts Reflux,” SUFU Winter Meeting, 2023. https://sufuorg.com/home.aspx

[11] K. Kalayeh, J. B. Fowlkes, A. Chen, S. Yeras, M. L. Fabiilli, W. W. Schultz and B. S. Sack, “Catheter-Free Bladder Phantom Pressure Measurement with Contrast-Enhanced Ultrasound,” SUFU Winter Meeting, 2023. https://sufuorg.com/home.aspx

[12] K. Kalayeh, J. B. Fowlkes, A. Chen, S. Yeras, M. L. Fabiilli, W. W. Schultz and B. S. Sack, “Catheter-free Bladder Phantom Pressure Measurement-Comparison Study of Commercial Ultrasound Contrast Agents,” AUA Annual Meeting, vol. 209(Supplement 4), no. Supplement 4, 2023. http://dx.doi.org/10.1097/ju.0000000000003296.11

[13] S. Yeras, K. Kalayeh, J. B. Fowlkes, A. Chen, W. W. Schultz and B. S. Sack, “Assessing the Efficacy of DEFINITY®, Lumason®, Sonazoid®, and OPTISON ® in Bladder Phantom Pressure SHAPE Measurements: A Necessary Step Toward Clinical Evaluation,” AIUM UltraCon, 2024. https://ultracon2024.eventscribe.net/

[14] H. Tai, K. Kalayeh, J. O. DeLancey, J. Ashton-Miller and J. B. Fowlkes, “Urethra Tissue Characterization using Angle Dependent Multiparametric Ultrasound Imaging,” AIUM UltraCon, 2024. https://ultracon2024.eventscribe.net/

[15] K. Kalayeh, J. B. Fowlkes, M. Zhang, S. N. Ambani, W. W. Schultz and B. S. Sack, “Evaluation of Renal Obstruction with Dynamic Contrast-Enhanced Ultrasound,” AIUM UltraCon, 2024. https://ultracon2024.eventscribe.net/

[16] K. Kalayeh, J. B. Fowlkes, J. O. DeLancey, J. A. Ashton-Miller, W. W. Schultz and B. S. Sack, “Catheter-Free Pressure Measurements in Human Bladder With Subharmonic-Aided Pressure Estimation (SHAPE): A proof of Concept,” AIUM UltraCon, 2024. https://ultracon2024.eventscribe.net/

[17] K. Kalayeh, J. B. Fowlkes, P. Schmidt, H. Tai, W. W. Schultz, B. S. Sack, J. A. Ashton-Miller and J. O. DeLancey, “Evaluation of Urinary Incontinence by Automated Quantification of Urethral Mobility in Ultrasound Imaging,” AIUM UltraCon, 2024. https://ultracon2024.eventscribe.net/

[18] K. Kalayeh, J. B. Fowlkes, P. Schmidt, H. Tai, W. W. Schultz, B. S. Sack, J. A. Ashton-Miller and J. O. DeLancey, “Automated Quantification Of Ultrasound Imaging: A New Horizon In Urethral Mobility Assessment,” SUFU Winter Meeting, 2024. 

[19] K. Kalayeh, J. B. Fowlkes, J. O. DeLancey, J. A. Ashton-Miller, W. W. Schultz and B. S. Sack, “Human Bladder Pressure Measurement With Contrast-Enhanced Ultrasound: A Proof Of Concept,” SUFU Winter Meeting, 2024. 

[20] K. Kalayeh, S. N. Ambani, J. B. Fowlkes, M. Zhang, W. W. Schultz and B. S. Sack, “Role of contrast enhanced ultrasound in evaluating obstruction resolution after pyeloplasty,” AUA Annual Meeting, vol. 211(5S), no. 5S, pp. 0, 2024. http://dx.doi.org/10.1097/01.ju.0001009512.15743.d7.04

[21] K. Kalayeh, S. N. Ambani, J. B. Fowlkes, M. Zhang, W. W. Schultz and B. S. Sack, “Dynamic contrast-enhanced ultrasound can diagnose kidney obstruction,” AUA Annual Meeting, vol. 211(5S), no. 5S, pp. 0, 2024. http://dx.doi.org/10.1097/01.ju.0001009416.90901.7b.06

[22] K. Kalayeh, J. B. Fowlkes, J. O. DeLancey, J. A. Ashton-Miller, W. W. Schultz and B. S. Sack, “One step closer to a catheter-free pressure flow study: Subharmonic-aided pressure estimation of human bladders using contrast ultrasonography,” AUA Annual Meeting, vol. 211(5S), no. 5S, pp. 0, 2024. http://dx.doi.org/10.1097/01.ju.0001009476.18935.3b.09

[23] J. LaCross, K. Kalayeh, J. B. Fowlkes, J. A. Ashton-Miller and D. John, “Assessing the Feasibility of a Software-Augmented Method for Analyzing Pelvic Floor Kinematics via 2D Transperineal Ultrasound Imaging,” 2nd Annual Reproducible Rehabilitation Research Summit, 2024. 

[24] J. LaCross, K. Kalayeh, J. B. Fowlkes, J. A. Ashton-Miller and D. John, “Development of a Software-Augmented Non-Invasive Movement Analysis of Pelvic Floor Motion Using Two-Dimensional Transperineal Ultrasound Imaging,” Kidney, Urology and Hematology Research Training Inaugural National Meeting, 2024. 

[25] W. W. Schultz, K. Kalayeh, H. Xie, J. B. Fowlkes and B. S. Sack, “Practically perfect peristaltic pump performance,” Annual Meeting of the American Physical Society (APS), Division of Fluid Dynamics (DFD), Salt Lake City, UT, 2024. 

[26] H. Xie, W. W. Schultz, K. Kalayeh, J. B. Fowlkes and B. S. Sack, “Inverse Method for Ureteral Peristalsis Determination From Pressure Measurements,” Annual Meeting of the American Physical Society (APS), Division of Fluid Dynamics (DFD), Salt Lake City, UT, 2024. 

[27] H. Tai, K. Kalayeh, J. O. L. DeLancey, J. A. Ashton-Miller and J. B. Fowlkes, “Noninvasive Assessment of Urethral Tissue Using Multiparametric Ultrasound Imaging,” Gordon Research Conference, Waterville Valley, NH, 2024. https://www.grc.org/in-vivo-ultrasound-imaging-conference/2024/

[28] K. Kalayeh, J. B. Fowlkes, P. Schmidt, H. Tai, W. W. Schultz, B. S. Sack, J. A. Ashton-Miller and J. O. L. DeLancey, “Automated Quantification of Pelvic Floor Mobility in Transperineal Ultrasound for Urinary Incontinence Evaluation,” Gordon Research Conference, Waterville Valley, NH, 2024. https://www.grc.org/in-vivo-ultrasound-imaging-conference/2024/

[29] C. X. Hong, M. Masteling, K. Kalayeh, J. LaCross, J. O. L. DeLancey and L. Chen, “Semi-Automated Motion Tracking of Vaginal Pessaries and Pelvic Floor Structures on Dynamic {MRI},” AUGS PFD, Vancouver, Canada, 2025. https://pfdweek25.eventscribe.net/

[30] K. Kalayeh, J. O. L. DeLancey, H. Tai, B. S. Sack, W. W. Schultz, J. A. Ashton-Miller and J. B. Fowlkes, “Evaluation of stress urinary incontinence with automated quantification of urethral mobility in transperineal ultrasound: A proof of concept,” AIUM Annual Convention, Orlando, FL, 2025. 

[31] K. Kalayeh, J. O. L. DeLancey, H. Tai, B. S. Sack, W. W. Schultz, J. A. Ashton-Miller and J. B. Fowlkes, “Automated analysis of urethral mobility in transperineal ultrasound during valsalva and cough for stress urinary incontinence evaluation: A proof of concept,” Annual Meeting of Society of Urodynamics, Female Pelvic Medicine & Urogenital Reconstruction (SUFU), Rancho Mirage, CA, 2025.