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Open Imaging Index
MRI Brain

AIBL Synthetic Cerebral Microbleeds on SWI

Synthetic Cerebral Microbleed on SWI images (CSIRO Data Access Portal collection 50304)

Susceptibility-weighted brain MRI with expert-located cerebral microbleeds, plus copies with synthetic microbleeds at known positions, for training and benchmarking microbleed detectors when real labels are scarce. 370 scans from an Australian ageing study (57 with microbleeds) and 3,700 synthetic copies.

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Overview

This CSIRO collection supports work on detecting cerebral microbleeds in susceptibility-weighted MRI when few labelled lesions exist. It holds SWI scans from the Australian Imaging, Biomarker and Lifestyle (AIBL) study together with versions of the same scans into which a mathematical model has inserted artificial microbleeds at known positions. The accompanying paper (Momeni et al., 2021) reports that a classifier trained only on such synthetic lesions can detect real ones.

Composition

The file list on the Data Access Portal contains 57 SWI scans with real microbleeds and 313 scans without, each as a bias-corrected and histogram-matched NIfTI volume. Separate folders hold the copies with synthetic lesions: 570 for the microbleed scans and 3,130 for the scans without microbleeds, ten per scan. Three spreadsheets with real and synthetic microbleed information come with the scans. In total the collection has 4,073 files and about 17.7 GB. File names carry a numeric prefix and a suffix from T0 to T7; the collection does not document what they mean.

The collection description speaks of 75 scans with 175 real microbleeds, which does not match the 57 microbleed scans in the file list. The paper abstract states that the release includes a version with 37,000 synthetic lesions.

Acquisition

The scans come from AIBL, according to the collection's lineage statement. The collection does not state the scanner, field strength or sequence parameters, and the full paper is not openly accessible.

Annotations

Experts defined the locations of the real microbleeds; the labels are positions, not voxel masks. The scans with microbleeds are filed as definite cases. Synthetic microbleeds were modelled with a random Gaussian shape and placed in healthy brain locations, ten per scan, with their positions provided.

Known limitations

  • Point locations only; no segmentation masks.
  • No demographic or clinical data are included, and the number of distinct participants is not stated.
  • The collection description and the files disagree on the number of real microbleed scans.
  • The CSIRO Data Licence allows non-commercial use only and forbids passing the data on.

Cohort

Aggregate numbers from the sources below. Bars are relative to the largest value.

Contrast / sequence

Scans

Groups can overlap

  • Susceptibility-weighted 370 100%

folders rCMB_DefiniteSubject and NoCMBSubject in File list of collection 50304 from the Data Access Portal API (CSIRO Data Licence, no registration), NIfTI files counted per folder

Condition

Scans

Groups can overlap

  • Cerebral microbleeds 57 15%

folder rCMB_DefiniteSubject in File list of collection 50304 from the Data Access Portal API (CSIRO Data Licence, no registration), NIfTI files counted per folder

License and access

Our reading of the license, not legal advice. Before you use the data, read the original license and confirm that your use is allowed. We take no responsibility for how you use a dataset. Full disclaimer

Access
Open download

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Access page

CSIRO Data Licence

A personal, non-transferable licence for non-commercial use of data on the CSIRO Data Access Portal. The data may not be passed on, and no patent or other IP rights may be claimed over it. Free hardcopy products and non-editable images based on the data may be shared, and CSIRO must not be presented as endorsing the use or its results.

Original license text Version read: Licence deed in the CSIRO Data Access Portal user guide, read 2026-10-08 (retired for new collections on 2021-07-15) Checked 2026-10-08

What you can do

  • No
  • Not stated
  • Conditional
  • Conditional
  • Conditional

What you can share

  • No
  • Conditional
  • Share trained models Not stated

What you must do

  • Yes
  • Share alike No
  • No
  • No
  • Manuscript review No
  • Release code No
  • Return results No
  • Delete after use No

Limits

  • No
  • Location limits No

Citation

Momeni S, Fazlollahi A, Yates P, Rowe C, Gao Y, Liew AWC, Salvado O. Synthetic microbleeds generation for classifier training without ground truth. Computer Methods and Programs in Biomedicine 207, 106127 (2021). doi:10.1016/j.cmpb.2021.106127. Data: Momeni S, et al. (2021) Synthetic Cerebral Microbleed on SWI images. v1. CSIRO. Data Collection. https://doi.org/10.25919/aegy-ny12

Sources

Every number on this page comes from one of these documents. Each chart names the table or page it is taken from. The raw numbers are in stats.csv.