These are specialized dynamic studies where in the case of the IVP and VCU the upper and lower urinary tract is evaluated.
The sialogram evaluates the salivary glands and the dacrocystogram the lacrimal system.
Speech studies evaluate speech abnormalities.
Use is made of water soluble contrast material in all the investigations other than the speech studies where barium is used.
Fluoroscopy is used to obtain multiple images which are evaluated.
Due to the use of x-rays, female patients must make sure they are not pregnant.