1. A method for multi-modal visualization, comprising: selecting a first image dataset of a first timepoint, wherein the first image dataset represents an anatomical structure; loading the first image dataset of the first timepoint; selecting a second image dataset of a second timepoint, wherein the second image dataset represents the anatomical structure; loading the second image dataset of the second timepoint, wherein the first and second image datasets were acquired from different modalities; registering the first image dataset of the first timepoint with the second image dataset of the second timepoint; and displaying an image from the first image dataset of the first timepoint and an image from the second image dataset of the second timepoint at the same time and in separate views, wherein the first image dataset of the first timepoint and the second image dataset of the second timepoint each comprise data acquired from a computed tomography (CT), positron emission tomography (PET), single photon emission computed tomography (SPECT), magnetic resonance (MR) or ultrasound modality, and wherein the first image dataset of the first timepoint and the second image dataset of the second timepoint each comprise a CT image series and MR image series, a PET image series and SPECT image series, a combination of a CT and PET image series, a combination of an MR and PET image series, a combination of a CT and SPECT image series, a combination of an MR and SPECT image series or an ultrasound image series.