Projects:RegistrationLibrary:RegLib C17

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v3.6.3 Slicer Registration Library Case #17:
Kidney pre-op MR to intra-op CT

Input

fixed image/target: intra-operative CT		moving image: per-operative MRI

Modules

• BRAINSfit
• for mask generation: Draw tool in the Editor and/or Fast-Marching Segmentation,

Keywords

CT, MRI, abdominal, image-guided therapy, IGT, tumor ablation

Input Data

• fixed: intra-operative CT, oblique, 0.58 x 0.58 x 3 mm voxel size, dimensions 512 x 512 x 20
• moving: opre-operative MRI lique, 1.2 x 1.2 x 4 mm voxel size, dimensions 320 x 240 x 64

Registration Challenges

• intra-operative CT is acquired with limited FOV and very oblique position
• intra-operative CT contains artifacts from surgical needles
• both datasets have strong voxel anisotropy
• the region of interest (kidney) is small compared to the FOV, i.e. there is substantial "distracting" image content

Key Strategies

• manual alignment to obtain initial pose
• rough segmentation of both kidneys to mask "distracting" image content
• gradual increase in registration DOF.

Procedures

• Phase 1: obtain masks for kidney ROI

1. Use the Draw tool in the

Registration Results

Download

• Data
  • Registration Library Case 17: Kidney MR-CT (Data,Presets, Solution, zip file 11 MB)
• Presets
  • Registration Library Case 17: Parameter Presets (Slicer 3.6.3) (.mrml file 16 kB)
  • Link to User Guide: How to Load/Save Registration Parameter Presets