CHASE_DB1: Child Heart and Health Study in England

28 fundus images with manual vessel segmentations (two annotators).

At a glance

Field	Value
Short name	chase_db1
Full name	CHASE_DB1: Child Heart and Health Study in England
Primary category	fundus
Contained modalities	fundus
Tasks	segmentation
Samples	28
Classes	Not reported (Not reported)
Splits	all
Size	0.05 GB
Source-stated terms	CC BY 4.0
Normalized terms	cc-by
Descriptive screening label	Standard label without an explicit NC clause; not a permission finding
Terms scope	dataset_files
Access friction	anonymous_direct
Route backend	Manual (upstream-gated)
Availability	available (checked 2026-07-21)
Acquisition support	guided_instructions_only
Legacy sample-loader status	Standard loader included

Notes

Manual access only. Kingston landing pages: CHASE_DB1: https://researchinnovation.kingston.ac.uk/en/datasets/chasedb1-retinal-vessel-reference-dataset-4/; CHASE-AV: https://researchinnovation.kingston.ac.uk/en/datasets/chase-av-retinal-vessel-reference-dataset/

Access preflight and acquisition

CLI

# Read-only preflight
eyehub download chase_db1 --data-dir ./data --dry-run --json

# Explicit transfer, only when preflight reports supported behavior
eyehub download chase_db1 --data-dir ./data

Python

from eyedatahub.acquisition import preflight_dataset
from eyedatahub.datasets.registry import REGISTRY

ds = REGISTRY.get_dataset('chase_db1')
print(preflight_dataset(ds, './data'))  # no transfer

Upstream page: researchinnovation.kingston.ac.uk/en

Source-term evidence: researchinnovation.kingston.ac.uk/en

Loader example

This entry includes a standard DatasetSample loader.

from pathlib import Path
from eyedatahub.datasets.registry import REGISTRY

data_dir = Path('~/.eyedatahub/data').expanduser()
ds = REGISTRY.get_dataset('chase_db1')
samples = ds.load(data_dir, split='all')
for s in samples[:5]:
    print(s.sample_id, s.label, s.image_path)

Citation

BibTeX

@misc{chase_db1,
  title  = { CHASE_DB1: Child Heart and Health Study in England },
  note   = { Owen et al., 'Measuring retinal vessel tortuosity in 10-year-old children: validation of the computer-assisted image analysis of the retina (CAIAR) program', Invest Ophthalmol Vis Sci 2009. Data: https://researchinnovation.kingston.ac.uk/en/datasets/chasedb1-retinal-vessel-reference-dataset-4/; CHASE-AV reference: https://researchinnovation.kingston.ac.uk/en/datasets/chase-av-retinal-vessel-reference-dataset/ },
  year   = { 2009 },
  url    = { https://researchinnovation.kingston.ac.uk/en/datasets/chasedb1-retinal-vessel-reference-dataset-4/ },
}

Plain text

Owen et al., 'Measuring retinal vessel tortuosity in 10-year-old children: validation of the computer-assisted image analysis of the retina (CAIAR) program', Invest Ophthalmol Vis Sci 2009. Data: https://researchinnovation.kingston.ac.uk/en/datasets/chasedb1-retinal-vessel-reference-dataset-4/; CHASE-AV reference: https://researchinnovation.kingston.ac.uk/en/datasets/chase-av-retinal-vessel-reference-dataset/

Source-stated terms

• Raw source string: CC BY 4.0
• Normalized category: cc-by
• Apparent scope: dataset_files
• Descriptive screening label: Standard label without an explicit NC clause; not a permission finding

⚠️ Source-stated terms, scope, and normalized labels are curation metadata, not legal advice or a permission finding. Review the current official source before transfer or reuse.

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