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
First published	Unknown
Publication date precision	Unknown
Publication date evidence	Unknown
Publication date source field	Unknown
Publication date reviewed	Unknown
Primary category	fundus
Resource role	current_dataset
Dataset family	chase_db1
Contained modalities	fundus
Tasks	segmentation
Primary reported quantity	28 images
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

Reported quantities

Role	Count	Unit	Scope	Basis	Evidence
Primary	28	images	Primary quantity reported in the reviewed catalog source	legacy_catalog_field	researchinnovation.kingston.ac.uk/en

Counts retain their source-reported units. Additional rows can describe components, paired items, or derivative copies and are not automatically added to the primary quantity.

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/

Documented relationships

These links record source-supported lineage or overlap, not merely similar modality tags.

• retinal_vessel_robustness is derived from this record: The robustness benchmark contains augmented versions of DRIVE, STARE, and CHASE_DB1 images. (evidence)

Access information and download

CLI

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

# Download, 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 download

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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