Sialogram
Encyclopedia
Sialogram or sialography is imaging of the salivary gland
s using x-ray
then is inserted in this salivary gland duct's opening in the mouth, then a Radio-opaque fluid (Contrast medium) is injected in the duct through a small tube.
A series of radiographs would then be taken to determine the flow of the fluid , identify any obstructions and its location , the rate of fluid excretion from the gland.
Usually the radiographs taken are lateral oblique views of the face as Orthopantomogram
's are not useful for the purpose of locating the area due to superimpositions and the way they are taken to put the teeth in the main field.
Salivary gland
The salivary glands in mammals are exocrine glands, glands with ducts, that produce saliva. They also secrete amylase, an enzyme that breaks down starch into maltose...
s using x-ray
X-ray
X-radiation is a form of electromagnetic radiation. X-rays have a wavelength in the range of 0.01 to 10 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz and energies in the range 120 eV to 120 keV. They are shorter in wavelength than UV rays and longer than gamma...
Technique
A baseline radiograph of the required salivary gland would be taken , a cannulaCannula
A cannula or canula is a tube that can be inserted into the body, often for the delivery or removal of fluid or for the gathering of data...
then is inserted in this salivary gland duct's opening in the mouth, then a Radio-opaque fluid (Contrast medium) is injected in the duct through a small tube.
A series of radiographs would then be taken to determine the flow of the fluid , identify any obstructions and its location , the rate of fluid excretion from the gland.
Usually the radiographs taken are lateral oblique views of the face as Orthopantomogram
Orthopantomogram
An Orthopantomogram or Dental Panoramic Radiograph , also known as an "orthopantogram" or "panorex", is a panoramic scanning dental X-ray of the upper and lower jaw. It shows a two-dimensional view of a half-circle from ear to ear. An OPT relies on tomography i.e...
's are not useful for the purpose of locating the area due to superimpositions and the way they are taken to put the teeth in the main field.
Indications
- Salivary glandSalivary glandThe salivary glands in mammals are exocrine glands, glands with ducts, that produce saliva. They also secrete amylase, an enzyme that breaks down starch into maltose...
stones - Salivary duct calculus
- Sjögren's syndromeSjögren's syndromeSjögren's syndrome , also known as "Mikulicz disease" and "Sicca syndrome", is a systemic autoimmune disease in which immune cells attack and destroy the exocrine glands that produce tears and saliva....
- Salivary gland tumours
- Salivary gland narrowing or obstruction
Contraindications
- Allergy to the contrast medium, mainly to IodineIodineIodine is a chemical element with the symbol I and atomic number 53. The name is pronounced , , or . The name is from the , meaning violet or purple, due to the color of elemental iodine vapor....
. - Acute salivary gland infections