AIRAscore structure | AIRAscore MS
Image data requirementsRequirements for the DICOM dataset
AIRAscore analyses a native 3D T1 series, and for the MS report also a T2-FLAIR series. This page lists what the data must meet and lets you check your own series right in the browser.
Technical requirements and checklist for sending your MRI data.
Check your series
Drop DICOM files or a whole folder into the box. Only the headers are read, and the files never leave your computer.
Drop DICOM files or a folder here
or
This check reproduces the input check of AIRAscore 3.1.0 and helps with preparation.
01Common requirements
Apply to every sequence you send (T1 and T2-FLAIR).
| Scanner manufacturer | GE, Philips or Siemens |
|---|---|
| Field strength | 1.5 T or 3 T |
| Coverage (slice selection) | 140 to 260 mm (number of slices × slice thickness incl. gap) |
| Field of view (FOV) | max. 260 mm in phase and frequency encoding direction |
| Head coverage | Entire head fully covered |
| Positioning | Head tilted as little as possible |
| Image quality | No pronounced artifacts (e.g. motion, wrap-around, fold-over) |
02Which sequences does each report need?
T1 dataset
- Sequence: native T1-weighted dataset
- Acquisition: 3D
- Contrast: clear grey-white contrast, ideally hypointense CSF
- Voxel size: < 2 mm in each dimension
- Voxel volume: 0.1 to 2.4 mm³
1. T1 dataset, required
- Meets all criteria of AIRAscore structure
2. Additional T2-FLAIR dataset
- Sequence: T2-FLAIR dataset
- Acquisition: 2D or 3D
- In-plane resolution: ≤ 1.5 mm in x and y direction
- Slice thickness: ≤ 6 mm
Important: AIRAscore MS always requires both sequences, T1 and T2-FLAIR. A T2-FLAIR alone is not sufficient. Incomplete or non-conforming datasets cannot be analysed.
03Standard sequences by manufacturer
Depending on the MRI manufacturer, the common standard sequences are called:
| Manufacturer | T1 3D (structure and MS) | T2-FLAIR 3D (additionally for MS) |
|---|---|---|
| Siemens | MPRAGE | T2 SPACE FLAIR |
| GE | BRAVO, 3D FSPGR / IR-SPGR | 3D CUBE FLAIR |
| Philips | 3D TFE | FLAIR VISTA |
T2-FLAIR 2D is also supported, with an in-plane resolution up to 1.5 mm and slice thickness up to 6 mm.
Technical details of the input check
AIRAscore 3.1.0 checks these header values when it receives a series. The check above uses the same rules.
| Attribute | T1 (required) | T2-FLAIR (MS report) |
|---|---|---|
| Acquisition type | 3D | 2D or 3D |
| Manufacturer | GE, Philips or Siemens | GE, Philips or Siemens |
| Field strength | 1.5 T or 3 T | 1.5 T or 3 T |
| Voxel size | each edge < 2 mm, volume < 2.4 mm³ | ≤ 1.5 mm in plane, ≤ 6 mm between slices |
| Coverage (field of view) | ≤ 260 mm in plane, 140–260 mm in slice direction | ≤ 260 mm in plane, 140–260 mm in slice direction |
| Contrast agent | native, no contrast agent | – |
| Scanning sequence | Gradient echo (GR) | Inversion recovery (IR) |
| Repetition time (TR) | ≤ 15 ms or 1200–3200 ms | ≥ 4000 ms |
| Echo time (TE) | ≤ 10 ms | ≥ 60 ms |
| Inversion time (TI) | empty or 400–1100 ms (Siemens 600–1100 ms) | within 200 ms of the CSF null point (in brackets) |
| Flip angle | ≤ 15° | – |
| Required attributes | Sex F or M, age or birth date, patient ID, study, series and frame of reference UID, image type, acquisition date and time | Sex F or M, age or birth date, patient ID, study, series and frame of reference UID, image type, acquisition date and time |