1. A method of navigating an image series, the method comprising: (a) providing an image series containing a first number of planar images, the planar images comprising slices spatially aligned along an axis normal to the plane of each image; (b) storing the image series on a server; (c) grouping the images of the image series into a number of subseries, the number of subseries being less than the first number of images; (d) generating a representative image series by generating an image from each subseries; (e) transmitting the representative image series from the server to a client computing device; (f) displaying the representative image series on a display; (g) determining whether an image from the representative image series has been selected; and, (h) if an image from the representative image series has been selected, then transmitting the subseries associated with the selected image to the client computing device.