Overview

MRI phantoms provide stable reference signals for assessing SNR uniformity and geometric accuracy. They are used for routine QA and research validation. Phantoms support quantitative mapping and sequence comparison.

Relaxation Properties

Phantoms contain materials with known T1 and T2 relaxation times for calibration. Temperature control ensures consistent relaxation properties during testing. Multi compartment phantoms enable multiparametric assessment.

Geometric and Distortion Testing

Phantoms with grid patterns detect geometric distortion and gradient non linearity. Distortion correction and shimming procedures are validated using phantom data. Regular testing ensures accurate spatial measurements.

Long Term Stability

Phantom stability over time is critical for longitudinal studies and multicenter trials. Documentation of phantom performance supports reproducibility and regulatory submissions. Proper storage and handling preserve phantom integrity.