An approach for needle based optical coherence elastography measurements

First published in
Lecture notes in computer science  
Number in series
10434 LNCS
Start Page
655
End Page
663
Citation
Lecture Notes in Computer Science (10434): 655-663 (2017)
Contribution to Conference
20th International Conference on Medical Image Computing and Computer-Assisted Intervention, MICCAI 2017  
Publisher DOI
10.1007/978-3-319-66185-8_74
Scopus ID
2-s2.0-85029479197
Publisher
Springer
While navigation and interventional guidance are typically based on image data, the images do not necessarily reflect mechanical tissue properties. Optical coherence elastography (OCE) presents a modality with high sensitivity and very high spatial and temporal resolution. However, OCE has a limited field of view of only 2–5 mm depth. We present a side-facing needle probe to image externally induced shear waves from within soft tissue. A first method of quantitative needle-based OCE is provided. Using a time of flight setup, we establish the shear wave velocity and estimate the tissue elasticity. For comparison, an external scan head is used for imaging. Results for four different phantoms indicate a good agreement between the shear wave velocities estimated from the needle probe at different depths and the scan head. The velocities ranging from 0.9–3.4 m/s agree with the expected values, illustrating that tissue elasticity estimates from within needle probes are feasible.
Subjects
Interventional imaging
Optical coherence elastography
DDC Class
600: Technik
610: Medizin