Trond Varslot, dr.ing.

List of publications

Refereed journal publications

mathslaboratory G. Schröder-Turk, L. de Campo, M. Evans, M. Saba, S. Kapfer, T. Varslot, K. Grosse-Brauckmann, S. Ramsden, S. Hyde, Polycontinuous geometries for inverse lipid phases with more than two aqueous network domains, Faraday Discussions, 161, pp 215-247; doi:10.1039/C2FD20112G, 2013.

T. Varslot, H. Morales, and M. Cheney, Waveform design for synthetic-aperture radar imaging through dispersive media, SIAM Applied Mathematics, vol 71 (5), 2011. (pdf)

T. Varslot, A. Kingston, G. Myers, and A. P. Sheppard, High-resolution helical cone-beam micro-CT with theoretically-exact reconstruction from experimental data, Medical Physics, vol 38(10), doi:10.1118/1.3633900 (18 pages), 2011. (pdf)

B. Treeby, T. Varslot, E. Zhang, J. Laufer, and P. Beard, Automatic sound speed selection in photoacoustic image reconstruction using an autofocus approach, J. Biomed. Opt. 16, 090501; doi:10.1117/1.36191392011.

G. R. Myers, A. M. Kingston, T. K. Varslot, M. L. Turner, and A. P. Sheppard, Dynamic tomography with a priori information, Applied Optics, vol 50, issue 20, pp 3685-3690, doi:10.1364/AO.50.003685, 2011.

G. E. Schröder-Turk, T. Varslot, L. de Campo, S. C. Kapfer, and W. Mickel, A Bicontinuous Mesophase Geometry with Hexagonal Symmetry, Langmuir, vol 27 (17), pp 10475-10483, doi:10.1021/la201718a, 2011.

A. Kingston, A. Sakellariou, T. Varslot, G. Myers, and A. Sheppard, Reliable automatic alignment of tomographic projection data by passive auto-focus, Medical Physics, vol 38, 4934 (12 pages), doi:10.1118/1.3609096, 2011. (pdf)

L. de Campo, T. Varslot, M. J. Moghaddam, J. J. K. Kirkensgaard, K. Mortensen, S. T. Hyde, A novel lyotropic liquid crystal formed by triphilic star-polyphiles: hydrophilic/oleophilic/fluorophilic rods arranged in a 12.6.4. tiling, Physical Chemistry Chemical Physics, DOI: 10.1039/C0CP01201G, 2011.

S. Li, M. Jackowski, D. P. Dione, T. Varslot, L. H. Staib, K. Muller, Refraction Corrected Transmission Ultrasound Computed Tomography for Application in Breast Imaging, Medical Physics, vol 37, no 5, pp. 2233 (14 pages), doi:10.1118/1.3360180, 2010. (pdf)

T. Varslot, H. Morales, and M. Cheney, Synthetic-aperture radar imaging through dispersive media, Inverse Problems, vol 26, pp 1--27 (025008) 2010. (pdf)

M. A. Knackstedt, S. J. Latham, M. Madadi, A. P. Sheppard, T. Varslot, and C. Arns, Digital rock physics: 3D imaging of core material and correlations to acoustic and flow properties, The Leading Edge, vol 28, no 1, pp. 28--33, 2009.

T. Varslot, B. Yazici, and M. Cheney, Wide-band pulse-echo imaging with distributed apertures in multi-path environments, Inverse Problems, vol 24, pp. 1--28 (045013), 2008.

S. J. Latham, T. Varslot, and A. P. Sheppard, Automated registration for augmenting micro-CT 3D images, in Proc. 14th Biennial Computational Techniques and Applications Conf, J. ANZIAM, vol.50, pp. C534--C548, 2008.

R. C. Waag, F. Lin, T. Varslot, and J. P. Astheimer, An eigenfunction method for the reconstruction of large-scale and high-contrast objects, IEEE Trans Ultrason Ferroelectr Freq Control, vol.54, no.7, pp. 1316--1332, July 2007.

T. Varslot, C. E. Yarman, M. Cheney, and B. Yazici, A variational approach to waveform design for synthetic aperture imaging, Inverse problems in Imaging, vol.1, no.3, 2007.

T. Varslot, S.-E. Måsøy, and B. A. Angelsen, Aberration in nonlinear acoustic wave propagation, IEEE Trans. Ultrason. Ferroelectr. Freq. Control, vol.54, no.3, pp. 470--479, 2007.

S.-E. Måsøy, T. Varslot, and B. A. Angelsen, Variance analysis of arrival time and amplitude estimates from random speckle signal, J. Acoust. Soc. Am., vol. 121, no.~1, pp. 286--297, 2007.

T. Varslot and S.-E. Måsøy, Forward propagation of acoustic pressure pulses in 3D soft biological tissue, Modeling Identification and Control, vol.27, no.3, pp. 181--200, 2006.

T. Varslot and G. Taraldsen, Computer simulation of forward wave propagation in soft tissue, IEEE Trans. Ultrason. Ferroelectr. Freq. Control, vol.52, no.9, pp. 1473--1782, 2005.

S.-E. Måsøy, T. Varslot, and B. A. Angelsen, Iteration of transmit-beam aberration correction in medical ultrasound imaging, J. Acoust. Soc. Am., vol.117, no.1, pp. 450--461, 2005.

T. Varslot, B. A. Angelsen, and R. C. Waag, Spectral estimation for characterization of acoustic aberration, J. Acoust. Soc. Am., vol.116, no.1, pp. 97--108, July 2004.

T. Varslot, E. Mo, H. Krogstad, and B. A. Angelsen, Eigenfunction analysis of stochastic backscatter for characterization of acoustic aberration in medical ultrasound imaging, J. Acoust. Soc. Am., vol.115, no.6, pp. 3068--3076, June 2004.

S.-E. Måsøy, T. Varslot, and B. Angelsen, Estimation of ultrasonic wave aberration with signals from random scatterers, J. Acoust. Soc. Am., vol. 115, no.6, pp. 2998--3009, June 2004.

Book chapters

T. Varslot, B. Yazici, E. Yarman, M. Cheney, L. Sharf, Time-reversal waveform preconditioning for clutter rejection, in Principles of Waveform Diversity and Design, (V. Amuso, S. Blunt, E. Mokole, R. Schneible and M. Wicks, Eds.), Raleigh, NC: SciTech Publishing, Inc., 2010.

C. E. Yarman, T. Varslot, B. Yazici, and M. Cheney, Waveform Design for Distributed Aperture using ram-Schmidt Orthogonalization, in Principles of Waveform Diversity and Design, (V. Amuso, S. Blunt, E. Mokole, R. Schneible and M. Wicks, Eds.), Raleigh, NC: SciTech Publishing, Inc., 2010.

Conference papers

A Kingston, G Myers, T Varslot, X-ray beam hardening correction by minimizing reprojection distance in Proc. SPIE Developments in X-ray Tomography VIII, 85061D 1-10; doi:10.1117/12.928883, 2012.

G Myers, T Varslot, A Kingston, A Herring, A Sheppard, Ground-truth verification of dynamic x-ray micro-tomography images of fluid displacement, in Proc SPIE Developments in X-ray Tomography VIII, 85060P; doi:10.1117/12.929410, 2012.

T Varslot, A Kingston, G Myers, A Sheppard, Considerations for high-magnification high-cone-angle helical micro-CT, in Proc. SPIE Developments in X-ray Tomography VIII, 850614 1-10; doi:10.1117/12.929304, 2012.

T Varslot, A Kingston, S Latham, J Middleton, M Knackstedt, A Sheppard, Combining high-fidelity helical micro-tomography with region-of-interest scanning for improved core characterisation, in Proc. 2011 SCA Symposium, Austin TX, USA, 2011.

G Myers, A Kingston, T Varslot, M Turner, A Sheppard, Dynamic X-ray micro-tomography for real-time imaging of drainage and imbibition processes at the pore scale, in Proc. 2011 SCA Symposium, Austin TX, USA, 2011.

T Varslot, A Kingston, A Sheppard, A Sakallariou, Fast high-resolution micro-CT with exact reconstruction methods, in Proc. SPIE Developments in X-ray Tomography VII, Vol 7804, 780413, San Diego, CA, USA, 2010.

A Kingston, A Sakallariou, A Sheppard, T Varslot, S Latham, An auto-focus method for generating sharp 3D tomographic images, in Proc. SPIE Developments in X-ray Tomography VII, Vol 7804, 78040J, San Diego, CA, USA, 2010.

A Sakallariou, A Kingston, T Varslot, A Sheppard, S Latham, R Sok, C Arns, T Senden, M Knackstedt, Tomographic image analysis and processing to simulate micro-petrophysical experiments, in Proc. SPIE Developments in X-ray Tomography VII, Vol 7804, 78040P, San Diego, CA, USA, 2010.

R. M. Sok, T. Varslot, A. Ghous, S. J. Latham, A. P. Sheppard, and M. A. Knackstedt, Pore scale characterization of carbonates at multiple scales: Integration of MICROCT, BSEM and FIBSEM in Proc. 2009 SCA Symposium, Noordwijk aan Zee, Netherlands, 2009.

M. Kumar, R. Sok, M. A. Knackstedt, S. J. Latham, T. J. Senden, A. P. Sheppard, T. Varslot, C. Arns, Mapping fluid distributions in 3D at the pore scale: Quantifying the influence of wettability and saturation history on rock resistivity, Society of Petrophysicists & Well Log Analysts, 50th Annual Logging Symposium, The Woodlands, TX, USA, 2009.

S. J. Latham, T. Varslot, and A. P. Sheppard, Image registration: Enhancing and Calibrating X-ray Micro-CT Imaging, in Proc. 2008 SCA Symposium, Abu Dhabi, UAE, 2008.

M. Frijlink, H. Kaupang, T. Varslot, S.-E. Måsøy, Abersim: a Simulation Program for 3D Nonlinear Acoustic Wave Propagation for Arbitrary Pulses and Arbitrary Transducer Geometries, in Proc. 2008 IEEE Ultrasonics Symposium, pp. 1282-1285, Beijing, China, 2008.

T. Varslot, B. Yazici, and M. Cheney, Distributed aperture imaging with multiple transmitters in complex environments, in Proc. 2008 SPIE Defense and Security Conference, Orlando, FL, 2008.

T. Varslot, B. Yazici, and M. Cheney, Wideband pulse-echo imaging using distributed apertures in multi-path environments, in Proc. 2008 IEEE Radar Conference, Rome, Italy, 2008.

M. Knackstedt, A. Sheppard, S. Latham, M. Madadi, T. Varslot, C. Arns, G. Baechle, G. Eberli, Probing Pore systems in Carbonates, Society of Petrophysicists and Well Log Analysts Annual Symposium, May 25-28, 2008, Edinburgh, Scotland.

T. Varslot, B. Yazici, C. E. Yarman, M. Cheney, and L. Sharf, Waveform preconditioning for clutter rejection in multipath for sparse distributed apertures, in Proc. of The Second International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP), December 2007.

C. E. Yarman, T. Varslot, B. Yazici, and M. Cheney, Waveform design for distributed aperture using Gram-Schmidt orthogonalization, in Proc. 3rd International IEEE Conference in Waveform Design and Diversity, pp. 4011, 2007.

T. Varslot, B. Yazici, C. E. Yarman, M. Cheney, and L. Sharf, Time-reversal waveform preconditioning for clutter rejection, in Proc. 3rd International IEEE Conference in Waveform Design and Diversity, pp. 330-334, 2007.

T. Varslot, B. Yazici, C. E. Yarman, M. Cheney, and L. Sharf, Waveform preconditioning for clutter rejection, in Proc. 2007 SPIE Defense and Security Conference, pp. 6568N, 2007.

I. Y. Son, T. Varslot, C. E. Yarman, B. Yazici, and M. Cheney, Radar detection using sparse distributed apertures in urban environment, in Proc. 2007 SPIE Defense and Security Conference, pp. 65671Q, 2007.

H. Kaupang, S.-E. Måsøy, T. Varslot, T. Johansen, and B. Angelsen, Second-harmonic aberration correction, in Proc. 2007 IEEE-UFFC Ultrasonics Symposium, New York, pp. 1537--1540, 2007.

H. Kaupang, S.-E. Måsøy, T. Varslot, T. Johansen, and B. Angelsen, Generation and Aberration of Second-harmonic Ultrasound Beams in Heterogeneous Tissue, in Proc. 2006 IEEE-UFFC Ultrasonics Symposium, pp. 2160--2163, 2006.

T. Varslot and S.-E. Måsøy, Forward propagation of acoustic pressure pulses in 3D soft biological tissue, in Proc. SIMS 2005 46th Conference on Simulation and Modeling, ISBN 82-519-2093-0, 2005. (slides, preprint)

T. Varslot, S.-E. Måsøy, and B. Angelsen Aberration and second-harmonic imaging, in Proc. 2005 IEEE-UFFC Ultrasonics Symposium, vol. 2, pp 1327-1330, 2005. (slides, preprint)

S. Dursun, T. Varslot, T. Johansen, B. Angelsen, and H. Torp, Fast 3D simulation of 2nd harmonic ultrasound field from arbitrary transducer geometries, in Proc. 2005 IEEE-UFFC Ultrasonics Symposium, vol 4, pp 1964-1967, 2005. (preprint)

T. Varslot, E. Mo, H. Krogstad, and B. Angelsen, Eigenfunction analysis of stochastic backscatter for aberration correction in medical ultrasound imaging, 147th meeting of the Acoust. Soc. Am., 2004. (slides)

T. Varslot, S. Dursun, T. Johansen, R. Hansen, B. Angelsen, and H. Torp, Influence of acoustic intensity on the second-harmonic beam-profile, in Proc. 2003 IEEE-UFFC Ultrasonics Symposium, 2003. (poster, preprint)

T. Varslot, G. Taraldsen, T. Johansen, and B. Angelsen, Computer simulation of forward wave propagation in non-linear, heterogeneous, absorbing tissue, in Proc. 2001 IEEE-UFFC Ultrasonics Symposium, 2001.

Reports

T. Varslot, Wavefront aberration correction in medical ultrasound imaging, Dr.ing. thesis, ISBN 82-471-6561-9, NTNU, 2004.

T. Varslot, Technical aspects of the analysis needed to create a Recognized Land Picture, Technical Report - 01591, FFI, 2000.

T. Varslot, Concept for enhancing the quality of a Recognized Land Picture, Technical Report - 01878, FFI, 1999.

Patents

B. Angelsen, T. F. Johansen, T. Varslot, Corrections for wavefront aberrations in ultrasound imaging, US patent 7273455 issued 25.09.2007, priority date 17.07.2003.

M. Knackstedt, S. Latham, A. Kingston, A. Sheppard, R. Sok, T. Varslot, Image data processing, international application no. PCT/AU2009/000641, priority date: 23.05.2008.