These examinations seems rather uncommon and it's somewhat difficult to find out information about them. I'm curious what the effective dose of radiation would be for the CT scan? I imagine the risk of contrast (besides an allergic response) is minimal compared to a typical iodine study as the contrast just navigates around the salivary glands and is completely removed at the end (assuming it's water not oil based)?
Is an MRI (without contrast) a substitute for a sialography, or is a sialography the best way to image the parotid gland?
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source https://www.reddit.com/r/Radiology/comments/11dwt73/sialography/
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