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Article
Peer-Review Record

A Quasi-Static Quantitative Ultrasound Elastography Algorithm Using Optical Flow

Sensors 2021, 21(9), 3010; https://doi.org/10.3390/s21093010
by Raphael Lamprecht 1,*, Florian Scheible 1, Marion Semmler 2 and Alexander Sutor 1
Reviewer 1: Anonymous
Reviewer 2: Anonymous
Sensors 2021, 21(9), 3010; https://doi.org/10.3390/s21093010
Submission received: 2 April 2021 / Revised: 19 April 2021 / Accepted: 22 April 2021 / Published: 25 April 2021
(This article belongs to the Special Issue State-of-the-Art Sensors Technology)

Round 1

Reviewer 1 Report

Relative error of around 34% is quite significant. I see that you mention drying of the phantom as a possible reason but could this be due to viscoelastic nature of the phantom materials that was not considered in this work. I think discussing viscoelastic properties could be an interesting paragraph in the discussion and a good future direction for the work. 

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 2 Report

Strong study! And well structured. I have some suggestions which might help the authors to improve the paper. 

Lines 43-47. The structure of the introduction section is a bit disorganized. I would suggest removing the sentences between 43 and 47, and adding to the last paragraph of the introduction section . 

Figure4. What does the point 0 represent? Displacement starting point? Please clarify what do the axis x-y-z represent. Displacement magnitude?   Figure9. Same question. Where does the displacement start?  Generally, clinical guidelines suggest m/s unit. In order to generalize your results to the clinical settings, would it be possible to provide the results in m/s unit? Thank you for considering my recommendations. 

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

The authors have addressed my comments.

Reviewer 2 Report

Thank you for addressing the comments. The manuscript seems improved. I do not have any further suggestions. 

 
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