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- W4387399008 abstract "The advances in nuclear medicine have made dacryoscintigraphy a safe and easy method for assessing the flow dynamics and other physiological aspects of the lacrimal system [1–5]. It has a complementary role to anatomic studies and may help evaluate pediatric epiphora, partial obstructions, and the functional nasolacrimal duct obstructions. The test is performed by instilling 10 μl of technetium-99m pertechnetate into the conjunctival cul-de-sac and tracing the dye through the lacrimal system using a pinhole-collimated gamma camera. Patients are instructed to blink normally, and images are acquired in real time for up to 30 minutes. The study’s endpoint is the detection of radionucleotide dye in the nasal cavity. In a typical normal DSG, visualization of canaliculi and sac occurs before 30 s and with passage into the nasal cavity in 10–20 min. Areas of interest can be marked on the DSG images, and the quantity of tracer and times taken can be plotted on the time-activity scales. For example, if the system is obstructed at a point, the time-activity slope there would be flat. Disadvantages of DSG include poor anatomical details, poor resolution, and variable transit times throughout the lacrimal system [1–5]." @default.
- W4387399008 created "2023-10-07" @default.
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- W4387399008 date "2023-01-01" @default.
- W4387399008 modified "2023-10-07" @default.
- W4387399008 title "Dacryoscintigraphy" @default.
- W4387399008 cites W1995676980 @default.
- W4387399008 cites W2015164269 @default.
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- W4387399008 doi "https://doi.org/10.1007/978-981-99-1401-2_16-1" @default.
- W4387399008 hasPublicationYear "2023" @default.
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