"General notes :\n" "\n" " n1. Before starting, be aware of the \"Save As\" button and window.\n" "\n" " Open the \"Save As\" window to save any intermediate step\n" " that you are happy with. The save or overwrite process\n" " will not change which data set is currently being edited.\n" "\n" " n2. All drawing operations are done with the middle mouse button.\n" "\n" " n3. Different operations use different fill (drawing) values.\n" " This enables you to remove (unfill) the results of one\n" " operation without destroying the results of another.\n" "\n" " n4. Each window has a help button providing more details on\n" " that part of the process. Um, to be continued...\n" "\n" " n5. The main \"GyrusFinder\" window is used to open or raise the\n" " sub windows. If you close this window, all corresponding\n" " process windows will be closed. The main window can be\n" " reopened by restarting the GyrusFinder plugin under afni.\n" "\n" "\n" "0. Preliminaries.\n" "\n" " a. Use the \"Dataset Copy\" plugin to create an empty data set\n" " (of type fim). This is the dataset you will be drawing into.\n" "\n" " b. Choose the dataset (from a.) in the \"ROI Editor\" window of\n" " the GyrusFinder plugin. It is important that GyrusFinder is\n" " working with the same data set that afni is.\n" "\n" "1. Draw in anatomical boundaries.\n" "\n" " Every drawing mode in the \"ROI Editor\" window can be used to\n" " make a search boundary, except for \"Set Fill Point\". It is\n" " common to use \"Flood->Value\" to create any desired bounding\n" " planes, and then any/all of \"Open Curve\", \"Closed Curve\" and\n" " \"Connect Points\", along with the \"Interpolator\" (say it like\n" " Arnold would) to make more intricate cuts.\n" "\n" " If you try filling a white matter region and discover \"leaks\"\n" " around your boundaries, you can draw in more boundaries where\n" " they are needed and try a new fill.\n" " \n" "2. Search for and fill in white matter.\n" "\n" " You will provide the program with an initial point in the white\n" " matter to search from. Set the ROI Editor's Drawing Mode to\n" " \"Set Fill Point\" and select a point (again, this is with the\n" " middle mouse button).\n" "\n" " Next push the \"suggest range\" button (for the white matter)\n" " and/or enter a search range. Then hit the \"FILL\" button. You\n" " can adjust the range and constraints as needed.\n" "\n" "3. Search for and fill in the gray matter.\n" "\n" " This is done much like filling the white matter. One difference\n" " is that you do not select an initial point; currently the search\n" " begins with the border of the previously found white matter. \n" "\n" " Begin by setting the search range as done for the white matter.\n" " The \"max distance\" value restricts the distance of searchable\n" " gray matter from the found white matter; 4 often works well here.\n" " Once you are ready, \"FILL\" the gray matter.\n" "\n" "4. Holes are typically created by borderline intensity values near\n" " (not usually on) the white/gray border. They may be filled in\n" " by pressing the \"FILL\" button on the \"Hole Filler\" window.\n" " It is likely that the largest hole (not covering the whole brain)\n" " is not very large (say, 10 voxels), and so increasing the max\n" " size to be filled will no longer affect the results. You can\n" " check this using the \"stats\" button, noting the fill region\n" " size. If you are happy with the holes that are filled, you may\n" " want to refill them using the fill value of the gray matter.\n" "\n" "5. Once you are totally happy (more likely once you have minimized\n" " your unhappiness) with the results, and once you have saved\n" " what you have done so far (for recreation purposes), you can \n" " remove the values in the data set that you do not want as part\n" " of the resulting mask. This can be done either with rcalc, or\n" " by \"unfill\"ing the values that you do not want saved.\n" "\n" "6. Save the final result.\n" "\n" "\n" "Author: R Reynolds (rickr@mcw.edu)\n"