fbd892b8_n_between_2D_and_3D___Wikiecho__Limitations
[Advantages] The additional dimension (depth) that is inherent to 3D acquisitions allows data set navigation and cropping to obtain "en face" views of cardiac structure of interest that were not available with tomographic imaging modalities (2D echo, cardiac magnetic resonance, computerized tomography) [Limitations] 
Patients with arrhythmias or unable/unwilling to cooperate for breath holding are challenging to image with current 3D technology
Comparison between 2D and 3D - Wikiecho
Limitations