a) Shape and size of parotids and submandibular glands.

b) Radiotracer concentration in salivary glands, mouth, thyroid and soft tissues, before and after acid stimulous;

c) Compare salivary glands intensity with mentioned structures;

d) Note increase and diminution of activity in curves of all useful sites.

e) Late enhancement.

Grade 0 = Normal uptake and excretion.

Grade 1 = Mild functional involvement.

Grade 2 = Moderate functional involvement.

Grade 3 = Severe functional involvement.

Grade 4 = Absent salivary function.