Neonatal Brain Ultrasound With CEUS and Elastography

This study uses special ultrasound techniques — contrast-enhanced ultrasound (CEUS) and elastography — to examine the brains of newborns and very young babies being treated in neonatal units. These techniques may be able to detect brain problems earlier or more accurately than standard ultrasound. The study is observational, meaning researchers are just imaging and observing, not giving experimental treatments. You may be eligible if: - Your baby is under 7 months old - Your baby is receiving care in the neonatal unit at Turku University Hospital You may NOT be eligible if: - Your baby has a known genetic disease - Your baby has a complex birth defect requiring surgery - Your baby has a brain tumor - Your baby weighs less than 2.5 kg at the time of examination - Your baby has a known allergy to SonoVue (the ultrasound contrast agent) - Your baby has uncontrolled high blood pressure or heart instability Talk to your doctor to see if this trial is right for you.