coregistration
Spatial alignment of multiple imaging datasets to enable direct comparison and analysis.
Full Definition
Coregistration is a fundamental image processing technique that aligns multiple neuroimaging datasets into the same coordinate space. This process is essential when combining images acquired at different time points, using different scanning sequences, or from different modalities (such as MRI and PET). Coregistration algorithms use various optimization approaches including rigid body transformations, affine transformations, and non-linear deformations to achieve optimal alignment. Accurate coregistration is crucial for longitudinal studies, multi-modal imaging analysis, and precise localization of pathology across different imaging sessions.
Usage
Usage note: Often hyphenated as 'co-registration' in formal documentation.
In Context
- "Coregistration of the follow-up scan to the baseline image revealed subtle changes in lesion morphology." — Clinical imaging report
- "The preprocessing workflow included rigid-body coregistration followed by non-linear normalization to standard space." — Methods documentation