Sialolithiasis MRI
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American Roentgen Ray Society Images of Sialolithiasis MRI |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Mahda Alihashemi M.D. [2]
Overview
Magnetic resonance sialography may be helpful in the diagnosis of sialolithiasis Findings on Magnetic resonance sialography suggestive of sialolithiasis include low signal regions outlined by saliva ( high signal regions) on T2 weighted images. MRI can distinguished acute from chronic obstruction.
MRI
- Magnetic resonance sialography may be helpful in the diagnosis of sialolithiasis. Findings on magnetic resonance sialography suggestive of sialolithiasis include:[1][2][3]
- Stones are visible as low signal regions outlined by saliva (high signal regions) on T2 weighted images.
- Acute from chronic obstruction can be distinguished by magnetic resonance sialography on T1 signals:
- In acute obstruction, enlargement of the gland and inflammatory changes may be seen as reduced signal compared to other side.
- In chronic cases, size of the gland is decreased and fatty atrophy may be seen as an increased signal compared to the other side.
References
- ↑ Sumi M, Izumi M, Yonetsu K, Nakamura T (1999). "The MR imaging assessment of submandibular gland sialoadenitis secondary to sialolithiasis: correlation with CT and histopathologic findings". AJNR Am J Neuroradiol. 20 (9): 1737–43. PMID 10543651.
- ↑ Becker M, Marchal F, Becker CD, Dulguerov P, Georgakopoulos G, Lehmann W, Terrier F (2000). "Sialolithiasis and salivary ductal stenosis: diagnostic accuracy of MR sialography with a three-dimensional extended-phase conjugate-symmetry rapid spin-echo sequence". Radiology. 217 (2): 347–58. doi:10.1148/radiology.217.2.r00oc02347. PMID 11058627.
- ↑ Jäger L, Menauer F, Holzknecht N, Scholz V, Grevers G, Reiser M (2000). "Sialolithiasis: MR sialography of the submandibular duct--an alternative to conventional sialography and US?". Radiology. 216 (3): 665–71. doi:10.1148/radiology.216.3.r00se12665. PMID 10966693.