Infrared images of the SiO (5−4)-detected MDCs. From top to bottom, we present the images of Spitzer 3.6/4.5/5.8/8.0/24 μm and from left to right the images are in the region of different MDCs. The red and blue contours are the redshifted and blueshifted SiO (5−4) components with the same levels in Figure 1–15. The red crosses are the positions of identified 1.37 mm continuum sources. The wavelength is marked in the top-right corner. The scale bar is presented in the bottom-right corner.