Dr. Jeremie Fromageau Profile

Dr. Jeremie Fromageau

at Institute of Cancer Research

SPIE Involvement:

Author

SPIE Journal Paper | 5 February 2018 Open Access

Further characterization of changes in axial strain elastograms due to the presence of slippery tumor boundaries

Christopher Uff, Leo Garcia, Jeremie Fromageau, Aabir Chakraborty, Neil Dorward, Jeffrey Bamber

JMI, Vol. 5, Issue 02, 021211, (February 2018) https://doi.org/10.1117/12.10.1117/1.JMI.5.2.021211

KEYWORDS: Tumors, Tissues, Finite element methods, Elastography, Ultrasonography, Brain, Motion models, Breast, Cancer, Diagnostics

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Elastography measures tissue strain, which can be interpreted under certain simplifying assumptions to be representative of the underlying stiffness distribution. This is useful in cancer diagnosis where tumors tend to have a different stiffness to healthy tissue and has also shown potential to provide indication of the degree of bonding at tumor–tissue boundaries, which is clinically useful because of its dependence on tumor pathology. We consider the changes in axial strain for the case of a symmetrical model undergoing uniaxial compression, studied by characterizing changes in tumor contrast transfer efficiency (CTE), inclusion to background strain contrast and strain contrast generated by slip motion, as a function of Young’s modulus contrast and applied strain. We present results from a finite element simulation and an evaluation of these results using tissue-mimicking phantoms. The simulation results show that a discontinuity in displacement data at the tumor boundary, caused by the surrounding tissue slipping past the tumor, creates a halo of “pseudostrain” across the tumor boundary. Mobile tumors also appear stiffer on elastograms than adhered tumors, to the extent that tumors that have the same Young’s modulus as the background may in fact be visible as low-strain regions, or those that are softer than the background may appear to be stiffer than the background. Tumor mobility also causes characteristic strain heterogeneity within the tumor, which exhibits low strain close to the slippery boundary and increasing strain toward the center of the tumor. These results were reproduced in phantom experiments. In addition, phantom experiments demonstrated that when fluid lubrication is present at the boundary, these effects become applied strain-dependent as well as modulus-dependent, in a systematic and characteristic manner. The knowledge generated by this study is expected to aid interpretation of clinical strain elastograms by helping to avoid misinterpretation as well as provide additional diagnostic criteria stated in the paper and stimulate further research into the application of elastography to tumor mobility assessment.

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Proceedings Article | 26 March 2011 Paper

A two-dimensional locally regularized strain estimation technique: preliminary clinical results for the assessment of benign and malignant breast lesions

Elisabeth Brusseau, Valérie Detti, Agnès Coulon, Emmanuèle Maissiat, Nawèle Boublay, Yves Berthezène, Jérémie Fromageau, Nigel Bush, Jeffrey Bamber

Proceedings Volume 7968, 79680J (2011) https://doi.org/10.1117/12.877683

KEYWORDS: Ultrasonography, Tissues, Breast, Image compression, Elastography, Data acquisition, Tumors, Cancer, Reliability, In vivo imaging

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Proceedings Article | 17 March 2011 Paper

Retaining axial-lateral orthogonality in steered ultrasound data to improve image quality in reconstructed lateral displacement data

Leo Garcia, Jérémie Fromageau, Richard Housden, Graham Treece, Christopher Uff, Jeffrey Bamber

Proceedings Volume 7961, 796151 (2011) https://doi.org/10.1117/12.878764

KEYWORDS: Ultrasonography, Tissues, Image quality, Point spread functions, Elastography, Image compression, Beam propagation method, Beam steering, Data acquisition, Scanners

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