![Screen Shot 2021-12-08 at 7.01.37 PM](../_Media/screen-shot-2021-12-08-at_med.png)
Fastmap is a 4D image displace tool with an additional graph window for showing and analyzing the time dimension. Currently, the program allows 2 (& only 2) spaces to exist simultaneously. The first is the “time-series space”, which will be basis for all time-series analyses. The second is the “anatomy space”, which can hold an anatomical space that may or may not match the time-series space. If spaces are matched in terms of the same voxel dimensions, then cross-hairs, overlays, and color files will be joined across spaces. Tooltips will show information about the current space (dimensions, resolutions) and the current file name and number of time points.
![Screen Shot 2021-12-13 at 2.26.37 PM](../_Media/screen-shot-2021-12-13-at_med.png)
Color files and overlays must match the current time-series space. If the time-series space matches the anatomy space, then color files, overlays, and cross-hairs will be joined across spaces.
Standard time-series analyses will “group” color maps by type (e.g., {BPnd, R1, …} for PET, or {p-value, T-value, signal} for fMRI). Any linear map can also have a p-value threshold applied by clicking “filter by p-value”.
ROIs include those defined explicitly by the user in a text file (typically called “overlay-list.dat”) or extracted from an atlas file. ROIs can be selected individually or in combination. Pre-processing buttons along the bottom will replace the ROI pane with a preprocessing pane.
The graph window can be activated by clicking the graph button on the top center of the image window (or by the shortcut “g”). If a 4D dataset is loaded without reference to a time analysis model, the default analysis will be a GLM for fMRi. The analysis model can be selected from the combo box on the left side of the lower panel on the graph window.