1. NA-MIC All Hands Meeting - 1/9/2006
GE Research Status Report
Bill Lorensen
Jim Miller
Dan Blezek
Xiaodong Tao

2. GE Research engineering activities are distributed in three areas
Foundation (ITK)
Structure (Slicer)
Building codes (Dart)
Orientations (ITK)
Probability distributions (Sandbox)
Tensor estimation (Sandbox)
IO – DICOM, Transforms (ITK)
Fiber format conversion
(Slicer  FiberViewer)
Future:
fMRI
MRF solvers
Graph cuts
DW smoothing/interpolation
IO – Archetype, DICOM
Orientations
Registration
Slicer 3 architecture design
Future:
Slicer 3
Architecture
Data model
Execution model
Reimplementation of Dart
Single Java jar file
Embedded database
Embedded web server/servlet engine
Archival
Tasks
XML-RPC submissions
Temporal analysis
Beta releases 0.4, 0.5, 0.6, 0.7
Future:
Release 1.0 – 2/1/2006

3. Image orientation
Original ITK design: image orientation handled at application level
but ITK lacked the hooks to allow the application to handle orientation
Algorithms assumed images had the same orientation
Orientations now stored within an itk::Image
itk::OrientedImage uses the orientation information is computing transformations between index space and physical space
itk::OrientImageFilter and itk::ResampleImageFilter can be used to transform images to different orientations.
Registration algorithms can operate directly on OrientedImages

4. Probability distributions
ITK lacked standard statistical tests: t-Test, chi-squared tests, etc.
New distribution library to evaluate the PDF, CDF, and inverse CDF
Can be extended to non-parametric distributions

5. Other Tensor estimation
ITK code to construct diffusion tensors from N diffusion weighted images IO
DICOM
Transforms (factory IO)
Fiber format conversion
Slicer  FiberViewer

6. Slicer 3
Architecture
Data model
Execution model

7. Dart Software testing and reporting system
Distributed cross platform testing sent to a central server for reporting
Open access to submit and review
Nightly, Continuous, Experimental

8. Dart 2 Simplify server installation
Single jar file that contains everything a Dart server needs
Communication protocol implementations, web server, database, scheduling, reporting
Improve resource management
Reduce storage and duplication
Archival mechanism to age out data
Computational load
Reports generated on request
Extend reporting
Temporal analysis
Custom reports and queries

9. Dart 2 architecture Jaxor Digester Apache Jetty Servlets XML-RPC log4j
parsing
Jaxor
object
relational
bridge
Servlets
Jetty
servlet
engine
log4j
Quartz
scheduler DB
Connection
Pooling
Freemarker
template
engine
Virtual
Filesystem
Tasks
Archival
Derby
JFreeChart
plotting
Events