Brain_MRI_Used_Data_SD/README.md

Brain MRI Used Data: Gaussian vs SD DPO

This folder contains only the data used in the final matched DPO comparison and the held-out Figshare segmentation evaluation.

Training data

• train/images: 15,320 positive tumor MRI images.
• train/masks: unique lesion masks referenced by the training rows.
• train/negative_images/gaussian: tumor-region Gaussian-noise negatives.
• train/negative_images/sd: SD-generated negative images.
• train/csv/dpo_train_gaussian_15320.csv: Gaussian-negative DPO manifest.
• train/csv/dpo_train_sd_15320.csv: SD-negative DPO manifest.

The two CSV manifests contain the same image, mask, and caption rows. Only the negative image source differs.

Test data

• test/figshare_v2/images: 600 held-out images.
• test/figshare_v2/masks: 600 held-out ground-truth masks.

Caption templates

• metadata/base_caption_templates_100.json and .csv: the 100 base anatomical caption templates, where [A] is replaced by the modality.
• metadata/negative_caption_templates_100.json and .csv: the 100 negative caption sentence templates.
• metadata/caption_construction.json: the positive and negative caption assembly rules, including [B] tumor-type insertion.

Path policy

CSV paths are repository-relative and begin with Brain_MRI_Used_Data_SD/. No server-specific home directory is stored in these manifests.