dimensions over time (denoted as 2-Dþt and 3-Dþt, respectively, and the latter
is also referred to as 4-D). Despite the amount of 4-D imaging reported in the
literature, the vast majority of experiments today are still performed in 2-Dþt
(cf. Tables 15.1 and 15.2). Often this is due to limitations imposed by photo-
bleaching and phototoxicity, which preclude wasting light, as one can in con-
focal microscopy imaging. In other studies, in particular those addressing
intracellular dynamic processes, acquiring multiple optical slices would simply
take too much time relative to the motions of interest, resulting in intrascan
motion artifacts. In cases, for example, when studying cell migration in mono-
layers or microtubule dynamics in neurons, the structures ...