The conclusion from the most recent published study comparing VentriPoint 3DR against two other non MRI methods for determining Right Ventrical Volumes.

Current echocardiographic techniques to assess RV volumes are highly feasible and reproducible in paediatric post-operative TOF patients. When compared with MRI measurements, 3DR (Ventripoint) was the most accurate technique but requires extra equipment that is not readily available.

My comment: it may not be readily available now - but soon will be.