Pro-MRI Distortion - 09-401
Geometric Distortion Phantom - Diagnomatic by Pro-Project
Pro-MRI Distortion is a large-volume phantom with an internal three-dimensional reference grid for evaluating MRI geometric accuracy. Its liquid-fillable design supports distortion mapping during acceptance testing, commissioning and routine quality assurance.
Pro-MRI Distortion - Model 09-401
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Applications
- Map geometric distortion in three dimensions.
- Assess how geometric accuracy changes with distance from isocenter.
- Evaluate gradient nonlinearity with vendor correction enabled or disabled, where the scanner allows it.
- Perform acceptance, commissioning and periodic constancy checks of MRI geometric accuracy.
For workflows that require CT-to-MRI comparison, the phantom can also be scanned in CT to create a physical reference dataset. CT use can additionally support verification of positioning lasers.
Technical Specifications
| Model | 09-401 |
|---|---|
| Outside cylinder diameter | 350 mm (13.8 in) |
| Overall outside height | 275 mm (10.8 in) |
| Cylinder length | 300 mm (11.8 in) |
| Reference structure | Internal three-dimensional grid |
| Standard filling solution, when supplied | 10 mmol/L nickel chloride with 75 mmol/L sodium chloride |
| Product marking | CE marked |
3D Grid Reference Spacing
Nominal center-to-center distances between reference points:
| Inferior-superior (I-S) | 20.3 mm |
|---|---|
| Anterior-posterior (A-P) | 20.5 mm |
| Left-right (L-R) | 21.5 mm |
Accessories and Software
- Carrying and securing belt.
- Filling funnel.
- Gravity-feed filling tube set with hand pump.
- Filling solution supplied in separate containers.
- Wheeled transport and storage case.
- Diagnomatic software BASIC subscription.
Standards and Documentation
The phantom supports distortion testing and reporting based on principles from these publications:
- NEMA Standards Publication MS 12-2016.
- AAPM Task Group 284.
- AAPM Report No. 100.
- IEC 62464-1:2018.
The manual covers test procedures, evaluation of results and recording of measurements. Technical specifications can be adapted to customer requirements.