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Updated: Aug 13, 2026
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Lesion Explorer: A Video-guided, Standardized Protocol for Accurate and Reliable MRI-derived Volumetrics in Alzheimer's Disease and Normal Elderly
Published on: April 14, 2014
Lesion segmentation and manual warping to a reference brain: intra- and interobserver reliability
J A Fiez1, H Damasio, T J Grabowski
1Department of Neurology, University of Iowa, Iowa City, USA.
Human Brain Mapping
|April 19, 2000
Summary
This study assessed variability in lesion segmentation and warping for brain damage research. Results show high agreement between observers and automated methods, establishing benchmarks for anatomical interpretation.
Area of Science:
- Neuroscience
- Medical Imaging
- Brain Anatomy
Background:
- Studying acquired brain damage aids understanding of human brain function.
- Accurate lesion segmentation and warping are crucial for this research method.
Purpose of the Study:
- To quantify variability in lesion segmentation and warping using the MAP-3 approach.
- To compare manual (MAP-3) and automated (AIR-3) warping techniques.
Main Methods:
- Two observers performed lesion segmentation twice on ten subjects.
- Segmented volumes were warped using MAP-3 (manual) and AIR-3 (automated).
- Agreement was assessed using volume size, surface distance, and voxel overlap metrics.
Main Results:
- High intra- and interobserver agreement was observed for segmentation and warping.
- Warped volume surfaces typically differed by less than 3 mm between observers.
- Automated AIR-3 performance was comparable to manual MAP-3, with notable exceptions.
Conclusions:
- The MAP-3 technique demonstrates high reliability for lesion segmentation and warping.
- Benchmark parameters for expert and automated lesion transfer are established.
- Detailed anatomical interpretation of focal brain damage is reliable using MAP-3.
