A workstation was used to postprocess volume-rendered three-dimensiona
l (3D) dynamic contrast material-enhanced magnetic resonance (MR) imag
es of a breast carcinoma and a breast adenoma. Use of a 3D cursor allo
wed stereoscopic interactive probing of specific voxels to quantify co
ntrast enhancement over time, which was mapped to a gray scale that ef
fectively displayed enhancement as a fourth dimension. This technique
is generally applicable to any time-dependent 3D imaging modality.