FEAT: PET and CT Image Alignment with Affine Transformation

[LalithShiyam]

Description

Requesting the reintroduction and enhancement of affine alignment for PET and CT images, a feature from MOOSE v1.0. This was requested here! This feature should align PET and CT images, output the aligned CT, and produce a multilabel segmentation aligned with the PET image. The primary use case is to facilitate the extraction of activity concentration from aligned multimodal images.

Justification

Accurate alignment and segmentation are critical for combining anatomical and functional imaging data, essential for precise activity concentration analysis in research and clinical applications.

Requirements

1. Affine Alignment: Implement an improved affine alignment algorithm for PET and CT images (reuse from FALCON)
2. Output Aligned Images: Provide the aligned CT image as output.
3. Multilabel Segmentation: Output a multilabel segmentation map aligned with the PET image.
4. Extract activitiesn: Use the multilabel segmentation map to extract activities from the PET image.

Requested by

Tagging @vikashg as they have requested the creation of this feature request to address their specific needs.