2011 Winter Project Week:SegEye

From NAMIC Wiki
Jump to: navigation, search
Home < 2011 Winter Project Week:SegEye


Segmentation of the eye ball.
Axial view of the eye ball segmentation.


Key Investigators

  • Georgia Tech: Ivan Kolesov and Allen Tannenbaum
  • MGH: Gregory Sharp

Objective

  • We are interested in segmenting the eye ball, lens, optic nerve, and the optic chiasm.
  • Anatomical structures are highly sensitive to radiation.
  • We are creating a framework to perform these segmentations, which is likely to require a different approach for each structures due to the proximity of multiple structures to each other.

Approach

  • The eye ball is considered to be the pivotal organ since its segmentation will localize the region of interest when looking for other structures.
  • We will reduce the dimensionality of this problem by performing model based segmentation for each structure.
  • Once the eye is segmented, we use this knowledge to locate the lens/ initialize optic nerve segmentation.
  • We would like to leverage the information provided by a CT scan with additional data from an MRI -- we have to consider this registration problem.



Progress

  • We segmented the eye ball.
  • Experiments:
  1. VMTK Modules in Slicer for optic nerve segmentation.
  2. The particle filtering based approach for nerve segmentation.
  3. Ellipse constrained segmentation of optic lens.
  • Received a number of suggestions for future experiments:
#Incorporate constraints on Hounsfield units for segmentation of CT imagery.
#Use atlas for more robust localization of eye ball.
#Add prior anatomical knowledge for optic nerve segmentation (surrounding bone easily visible).