<unk>  (DSG), also known as lacrimal scintigraphy, is a nuclear medicine technique for imaging the lacrimal apparatus. It is used to identify obstructions, for example in the lacrimal duct, nasal cavity or nasolacrimal duct.
Dacryoscintigraphy
Electropalatography
Uroscopy
Microneurography
Immunoscintigraphy
Scintigraphy
Cholescintigraphy
Urinary tract ultrasound