Nuclear Salivary Scan Interpretation and Reporting
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We provide online interpretation and reporting of nuclear salivary scans. The reporting will be done by nuclear medicine specialists from India and USA and reports will be delivered within 24-48 hours.
Salivary Gland Scan is a nuclear medicine procedure done using 99mTc, uptake of which in salivary glands reflect intact salivary gland parenchyma. It is noninvasive and can quantify salivary glands (parotid and submandibular glands) simultaneously for both parenchymal and excretion functions with a single intravenous injection. Moreover, salivary gland scintigraphy is easy to perform, reproducible and well-tolerated by the patient.
Immediately after intravenous injection of 75MBq 99mTc, images are obtained consecutively for each 5 minutes during a period of 30 minutes to visualize the uptake and excretion of radiotracer by the salivary glands. The data are simultaneously acquired with an online computer system using a 30 second framing rate. The stimulant carbachol, a parasympathomimetic agent, is normally used to accelerate excretion. Stimulation shortens the scintigraphic study to a more acceptable time. Carbachol (0.25 mg) is administered subcutaneously 10 minutes after intravenous injection of pertechnetate, and the study is then continued for a further 20 minutes.
Indications of salivary scan are:
- Agenesis of gland
- Sjogren’s syndrome
- Post-surgical evaluation
- After multiple high-dose radioiodine treatments
- Assessment of gland functioning after therapy of head and neck tumors
- Assessment of salivary duct obstruction
- Salivary gland tumors
Scintigraphy is primarily a physiological examination unlike other imaging modalities (ultrasound,x-ray examination, MRI) which can only provide morphological and anatomical information. In patients who are allergic to radiographic contrast agent or when duct catheterization/ cannulation fails, it serves as an alternative to sialography.
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