Files:

*.nii are NIfTI-1 formatted image files, http://nifti.nimh.nih.gov/. ImageJ is a suitable viewer, http://imagej.nih.gov/ij/ 

CINE.nii: CINE MRI frames acquired during the cardiac cycle of a mouse.
DCE001noreacq.nii: DCE MRI frames of mouse 1 without reacquisition.
DCE001reacq.nii: DCE MRI frames of mouse 1 with reacquisition.
DCE00n.nii: DCE MRI frames of mouse n with reacquisition (n = [2,7]).

LungAngio.avi
avi movie file showing angiographic blood volume image of the thorax of mouse 1. 
Generated from the difference between DCE MRI frames 10 and 11 of DCE001reacq.nii.

*.txt are ASCII text files.

reacq00n.txt: DCE MRI reacquisition file for mouse n (n = [1,7]).
The files show duplicate successive entries for those acquisition blocks that were reacquired.
The number of uncorrupted acquisition blocks per breath interval can be deduced from the files.

timestamp00n.txt: DCE MRI timestamp file for mouse n (n = [1,7]).
The files show timestamps for the acquisition of the centre of k-space for each DCE MRI frame.