Maltese, 16 Years Thorax Sagittal

Why is the contrast in the VD view less than in the lateral views? Which parameter have I changed?
Maltese, 16 Years Thorax Sx

There is a mild rotation in this projection, sorry! The patient thought that biting the veterinarian was the right thing to do!
Maltese, 16 Years Thorax DX

There is quite advanced shoulder osteoarthrosis in this patient.