The problem with hemangiomas or general "angiomas" is that these tend to be thicker lesions thich can penetrate below the level of the skin. The pulsed dye laser will penetrate about 0.7mm into the skin which essentially treats only the top layers of the skin (epidermis and papillary dermis). This is why it can be so difficult to treat these type of vascular lesions with a pulsed dye laser.
A better option would be to combine the pulsed dye laser with a Nd:YAG laser which can penetrate about 10mm into the tissue, depending on the laser settings. Because of the deeper penetration, the Nd:YAG can treat the deeper component of the lesion and give a better and more reliable result
