Rotational elastography: six degree-of-freedom seismology in soft tissues measures local elasticity with diffuse fields
Abstract
Elasticity is a key indicator for soft tissue pathologies such as malignant tumours. I show theoretically and experimentally that leveraging the full six degree-of-freedom shear wave motion enables local elasticity for shear wave imaging with spatially diffuse fields. The experimental proof-of-concept is presented for magnetic resonance elastography of a brain phantom, but the theoretical derivation holds for various elastography imaging methods. Inspired by rotational seismology, this work introduces new acquisition and processing methods for non-invasive soft tissue characterisation using random wave-fields. A second result combining rotational elastography with seismic interferometry illustrates the method's potential to be combined with existing setups and processing techniques. Beyond its application in magnetic resonance imaging, an adaptation of rotational elastography for ultrasound imaging and optical coherence tomography could be envisaged.
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BibTeX
@article{aichele2026rotational,
title = {{Rotational elastography: six degree-of-freedom seismology in soft tissues measures local elasticity with diffuse fields}},
author = {Johannes Aichele},
journal = {Physics in Medicine and Biology},
year = {2026},
month = oct,
doi = {10.1088/1361-6560/ae811f},
url = {https://hal.science/hal-05789536v1},
note = {CC BY},
}
RIS
TY - JOUR
TI - Rotational elastography: six degree-of-freedom seismology in soft tissues measures local elasticity with diffuse fields
AU - Johannes Aichele
PY - 2026
DA - 2026/10/09
JO - Physics in Medicine and Biology
DO - 10.1088/1361-6560/ae811f
UR - https://hal.science/hal-05789536v1
AB - Elasticity is a key indicator for soft tissue pathologies such as malignant tumours. I show theoretically and experimentally that leveraging the full six degree-of-freedom shear wave motion enables local elasticity for shear wave imaging with spatially diffuse fields. The experimental proof-of-concept is presented for magnetic resonance elastography of a brain phantom, but the theoretical derivation holds for various elastography imaging methods. Inspired by rotational seismology, this work introduces new acquisition and processing methods for non-invasive soft tissue characterisation using random wave-fields. A second result combining rotational elastography with seismic interferometry illustrates the method's potential to be combined with existing setups and processing techniques. Beyond its application in magnetic resonance imaging, an adaptation of rotational elastography for ultrasound imaging and optical coherence tomography could be envisaged.
SN - 0031-9155
SN - 1361-6560
ER -