Answer
Optison’s perflutren-containing microspheres have ultrasonic properties very different from soft tissue, generating strong echoes, and are sufficiently small and stable to pass through the lungs and enhance echoes in the left heart cavities.
Sources for this answer
- OPTISON 0.19 mg/ml dispersion for injectionGE Healthcare Limited · emc · SmPC §5.1 Pharmacodynamic properties · Version 1Document updated
Sources checked