 In very young babies, it may be possible to perform the examination while they are in a natural sleep.New image capture techniques such as 4D flow require a shorter scan and can lead to reduced needs for sedation.Enlarged right ventricle with poor function in a patient with repaired tetralogy of Fallot by CMR

The majority of CMR is performed on conventional superconducting MRI systems at either 1.5T or 3T.