Imlook4d started as a viewer for 4-dimensional viewer for medical PET, CT, MRI images. For more than a decade it has evolved to include tools typically not available in image viewers. The most important feature is the easy method to extend functionality, by adding a single matlab file into a folder (resulting in it becoming an integrated menu in imlook4d)

Tell me about your use case, and give some feedback. Mail me!

imlook4d screen shot

Figure 1. Screen shot of imlook4d PET/MRI with applied temporal Hotelling filter


Get imlook4d


Documentation and Tutorials


The program is developed in Matlab and works on all platforms

Some features of imlook4d:

  • Full 4D viewer
  • VOI analysis, using brush tool (easier than polygons), thresholded brushing. Load and Save VOI definitions.
  • DICOM, Nifti, Analyze, ECAT (very fast compared to Matlabs routines), and reads binary, interfile and some other formats
  • Export/Import to Matlab workspace, allowing data manipulation in workspace and export back to imlook4d
  • Drop-in SCRIPTS (written in Matlab) makes it easy to add matlab code to imlook4d menues
  • Some 30 useful scripts for Matrix and ROI processing
  • Interactive help, click on GUI elements to open detailed help window
  • Integrated with ImageJ and SPM
  • Requires Matlab (with no additional toolboxes)


imlook4d git repository: