Use the save function?
save('image.tif','X')
Where X is your image in matlab, you could do it in a for loop. like this:
for i=1:length(namecell)
save(strcat(namecell{i},num2str(i),'.tif'),'X.(strcat(X),num2str(i))')
end
where namecell is a list of names that you want for your files, and X is a struct that contains your images.