Found a solution myself.
imread
provides everything I needed. This code extracts all the images like a charm:
info = imfinfo(file);
A = imread(file, 1,'Info', info);
B = imread(file, 2,'Info', info);
C = imread(file, 3,'Info', info);
D = imread(file, 4,'Info', info);
E = imread(file, 5,'Info', info);
regards
Arnold