You can display an image by dragging-and-dropping the file or using the File/Open menu item. MRIcro can view images in many medical imaging formats. The Window/YokeWindows option allows you to link different images so they display the same location.The View/ChangeBackground switches the background between black and white.The View/RemoveHaze command removes ‘dust’ from the air around an object (described below).If you have a 4D dataset loaded (described below), roll the scroll wheel left and right (or swipe left and right with two fingers) to adjust which volume is displayed.If you have an overlay loaded (described below), right-click and drag over the 2D slices to adjust the transparency of the overlay.Right-click and drag over the 3D rendering to adjust the position of the clipping plane (for example, in Figure 2 we have set the clip plane to remove the top of the head).Roll the scroll wheel up and down (or pull two fingers up and down on a touch pad) to adjust the clipping depth of the 3D rendering (for example, in Figure 2 we have clipped the top of the brain from the rendering).Drag the 3D rendering to rotate the object.Click on any location on a 2D slice to jump to that location.The “View” pull down menu allows you to set whether you want to see only 2D slices, only 3D renderings or both (the default).The “I”nformation button displays basic information about your image (e.g.For example, in Figure 2 the color range for the blue-green overlay is from 2 to 5. The “Darkest” and “Brightest” number values allow you to display the range for image intensity.Initially, this is set to black-white, but you have many options such as blue-green. The “Color Scheme” pulldown menu allows you to adjust the colors used to display image intensity.Toolbar adjustments (you can hide or show the toolbar with the View menu).Here are some simple commands for adjusting the view: You can view multiple images simultaneously. The software also provides a File/OpenRecent menu item for reloading images. To load an image, you can drag the image to the application icon, drag the image to an open window, or use the File/Open command. mha), ECAT (.v), DeltaVision (.dv), AFNI (.head/.brik), Freesurfer (.mgh. nrrd), Philips (.par/.rec), ITK MetaImage (.mhd. hdr/.img), Bio-Rad Pic (.pic), NRRD (.nhdr. ![]() This software can display the following formats: NIfTI (.nii. The software uses the computers graphics card, so computers with better cards and drivers will be able to view higher resolution images as described in the troubleshooting section. Users with older versions of macOS should consider MRIcron. Users of other operating systems should consider the more powerful MRIcroGL. This software is a universal binary that runs natively on both Intel (x86-64) and Apple Silicon (arm64) CPUs. Requirements, Downloading and Installation It is designed for NIfTI format images (popular with neuroimaging scientists) but can typically view images in many popular 3D raster formats including BioRad PIC, DICOM, NRRD, MGZ/MGH, AFNI BRIK, ITK MHA format images. MRIcro is a 3D viewer and volume renderer for medical images.
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