• RecurringMeetings
• 2018-08-14

Recurring Meeting of Cleveland Clinic Core Team

Date: August 14, 2018

Time: 2:00 PM EST

Means: In person meeting

Attendees:

1. Ahmet Erdemir
2. Tammy Owings
3. Tyler Schimmoeller
4. Sean Doherty
5. Rici Neumann
6. Ariel Schwartz
7. Ben Landis (Skype)

Agenda:

1. Manuscripts update.
2. Data dissemination update.
3. In vitro testing status.

4. Modeling & simulation status.

5. Review of action items from past meeting.

   • https://simtk.org/plugins/moinmoin/multis/RecurringMeetings/2018-08-07

6. Decide action items for next meeting.
7. Other.

Ongoing Action Items:

• Rici
  • Develop organization strategy for model dissemination.
  • Assist Tyler with upcoming surgical tools experiment.
• Tyler
  • Take over development of manuscript on tissue thickness measurement comparisons.
  • Complete editing instrumented ultrasound manuscript for resubmission.
  • Revisit repeatability testing for tissue characterization.
• Ben
  • Make sure FEBio and Sofa are working with Windows.
  • Solve test problems for the model assembly paper using Windows.
• Sean
  • Develop a model of the upper leg of male donor with a finer mesh.
  • Begin generating models from data of the female donor.
• Ariel
  • Assist Tyler with upcoming surgical tools experiment.
  • Assist Sean in the model building process as needed.
• Ahmet
  • Review instrumented ultrasound manuscript for resubmission.
  • Review draft of model assembly manuscript.
  • Compile haptics libraries and SofaHAPI.

Notes:

1. Manuscripts update.
   • Rici sent an e-mail to Scientific Data to get an update on the status of the in vivo data paper. Waiting to hear back.
   • Ahmet quickly looked at the indentation paper and suggested normalization of the stiffness using the area of the probe. His initial thoughts are to expand the introduction to enhance the motivation for haptics.
   • Ahmet reviewed Tyler's reformatted paper and suggested double spacing and fix the figures (in separate document - which needs to be added to repository).

   • Ahmet will return back to Ben's model assembly paper with insights from the KneeHub project as well as Sean's model building experience.

   • Tyler and Ariel are interested in writing manuscripts. Ahmet suggested focusing on in vitro data paper (for submission to Scientific Data). He also suggested the comparison paper that Rici started for measurement of tissue thickness. The other open paper to potentially write would be the comparison of in vivo and in vitro indentation data.
   • Tyler will focus on the image modality comparison paper.
   • Ben will re-run the test problems for the model assembly paper. Make sure inputs and outputs are saved and changes are documented and tested on Linux.
2. Data dissemination update.
   • Rici and Ahmet met with the Stanford group. Tod is working to fix two final bugs and then the data management site will be cloned so that the in vitro data can be disseminated.

   • The integration with SimTk is still in the testing process. There are still a couple of bugs, but we will test the next version when it is ready.

3. In vitro testing status.
   • First surgical tools test will be on Friday.
   • Tyler has been working on testing fat and asked Ahmet about the strain/stain rate to apply. Rici will provide him with the details from experimentation and then a decision will be made for specifications from there.

4. Modeling & simulation status.

   • Ben has gotten his scripts to run on his Windows laptop. He has not tried the MED to FEBio script yet.
   • Ahmet highlighted Ben's role in the modeling to focus on updates/features for the modeling scripts and also morphing.
   • Ben brought up the FEBio versions. The functioning versions between Linux and Windows are different and therefore Ben will test the performance between 2.7 and 2.8. The contact formulations should be improved when compared to the older versions of FEBio. Ahmet suggested keeping version 2.5 as a "fall-back" plan. One of the main reasons for this is the pre-strain plugin, which is not updated for 2.8 yet.
   • Ahmet suggesting coming up with a structured approach to test the different versions of FEBio. A test suite would be ideal. This will be discussed further in the future.
   • Sean ran the mesh convergence tests without Lagrange multipliers (with penalty) and that resulted in a probe reaction force range of 54 to 74N. Ahmet asked Sean to increase the mesh density even further (Meshlab sub-divide triangles).
   • Sean also wrote a Python script to extract edge length and aspect ratio from STLs.
   • Sean has started working on the female model.
   • Ahmet asked Ben about the initial probe placement within the models. Ben was not sure if it was from the experiment or just arbitrarily placed within the model. Ahmet would like to have a placeholder for the template model which would then be adjusted using additional scripts.
   • Sean has completed models for all four segments of the male specimen. The upper leg also has four different mesh densities.
5. Review of action items from past meeting.
   • All action items were related to the agenda items; refer to discussions above.
6. Decide action items for next meeting.
   • See Ongoing Action Items above.
7. Other.
   • None noted.