Preliminary Results Preliminary Results

Prior to the 2014 STACOM workshop, all LV mechanics challenge participants were asked to submit the following results:

Result 1. Participants were provided with the 3D coordinates of a dense set of material points (the points at which fibre vectors were provided) in the diastasis (DS) geometry, and asked to use their LV mechanics models to predict the locations of these material points at end-diastole (ED) and end-systole (ES).

Result 2. Participants were asked to predict total Cauchy fibre stress at the same set of material points for the ED and the ES states.

Eight participants submitted their model-based predictions. One participant (P_3) submitted results for just a single case. Another participant (P_5) submitted only the ED results for each of the four cases.

The following are presentation slides of the results:

For each submission, Result 1 was compared with experimental estimates, derived from MRI tissue tagging data, for the same set of material points. For each material point, the goodness-of-fit was quantified as the Euclidean distance between the model prediction and the experimentally derived location. Spatial distributions of these error magnitudes were illustrated using 3D colour maps. This analysis was applied to the material point predictions submitted by each participant for ED (slide 2) and ES (slide 3).

Experimentally derived estimates of the total Cauchy fibres stress distributions were not available. Therefore, the submissions of Result 2 were compared amongst the participants. 3D spatial maps of total Cauchy fibre stress were generated for ED (slide 4) and ES (slide 5) to illustrate the variation in model predictions.

[get the PDF file]

Organisers Organisers
  1. Alistair Young
    (University of Auckland, NZ)
  2. Martyn Nash
    (University of Auckland, NZ)
  3. Vicky Wang
    (University of Auckland, NZ)

 

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