Recommendations for viewing and orienting 2D echocardiography slices in 3D viewer

I have DICOM data containing 2D echocardiography time sequence. I want to visualize and orient these in the 3D viewer so that I can overlay them with 3D CT/MRI images from the same patient. What’s the best way to do this? I tried using the Echo Volume Render, but it didn’t seem to work, and I understand it’s designed for 3D or 4D echo data.