Registration and fusion of CT and MRI of the temporal bone

  • Bartling S
  • Peldschus K
  • Rodt T
 et al. 
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OBJECTIVE: To present and evaluate a registration method to fuse complementary
information of CT and MRI of the temporal bone. METHODS: CT and MRI
of the temporal bone of 26 patients were independently registered
4 times. A manual, iterative, intrinsic, rigid, and retrospective
registration method was used. Mean CREm (consistency registration
error) was calculated as a reproducibility measurement. RESULTS:
CREm was 0.6 mm (95% CI = 0.52-0.68 mm). T-test revealed no difference
between pathologic and normal cases (t[102] = -1.71; P = 0.09). Time
needed: 13 minutes. In the registered and fused datasets, important
bony surgical landmarks (eg, facial nerve canal, inner ear) could
be assessed in 3 dimensions relatively to tumor tissue (eg, acoustic
schwannoma). Fluid distribution within partially obliterated cochleae
could be assigned to either scalae. CONCLUSION: An accurate, reproducible
registration and fusion method that improves tumor surgery and cochlea
implantation planning with only minor changes to the clinical workflow
was presented and described. We suggest this method in selected cases.

Author-supplied keywords

  • CT
  • Cochlea implantation
  • MRI
  • Myotonic dystrophy
  • Registration
  • Temporal bone

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  • Soenke Heinrich Bartling

  • Kersten Peldschus

  • Thomas Rodt

  • Florian Kral

  • Herbert Matthies

  • Ron Kikinis

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