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. Author manuscript; available in PMC: 2017 Jul 1.
Published in final edited form as: Ann Biomed Eng. 2015 Nov 9;44(7):2273–2281. doi: 10.1007/s10439-015-1499-9

FIGURE 2.

FIGURE 2

Eight materials were tested for viability as markers on mitral valve tissue. (a) Photograph of testing setup. (b) Raw surface meshes of markers, tissue, and carbon-fiber scan bed, generated by intensity thresholding (pink, −800:−230; red, −230:320; purple, 320:22000). (c) Refined meshes of markers isolated from other material. Metal 3 was not resolvable from the tissue. (d) Heavier metals (1 and 2) caused artifacts in the soft tissue threshold range, rendering them nonviable. Both positive artifacts (high-intensity voxels suggesting physical material that was not actually present) and negative artifacts (low-intensity voxels suggesting absence of physical material that was present) were observed.