CT of sinusitis
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Author:
Mikael Häggström [notes 1]
Planning
Settings
- A low-dose CT without contrast is generally sufficient in suspected acute sinusitis.
- Normal radiation dose is indicated in suspected chronic sinusitis.
- Imaging without and with IV contrast is indicated in a suspected facio-maxillary abscess.
Evaluation
- Mucus content in paranasal sinuses, particularly the ostiomeatal complex.
Ostiomeatal complex (green area)
- If detected, measure the attenuation of the mucus. Acute sinus secretions have a radiodensity of 10 to 25 Hounsfield units, but in a more chronic state they become more viscous, with a radiodensity of 30 to 60 HU.[1]
- Any sclerotic thickening of the walls of the sinuses, indicating chronic sinusitis.
- Any abnormal protrusion of teeth into the maxillary sinuses.[2]
- Any mucus or fluid in mastoid cells or the middle ear.
Notes
- ↑ For a full list of contributors, see article history. Creators of images are attributed at the image description pages, seen by clicking on the images. See Radlines:Authorship for details.
References
- ↑ Page 674 in: Paul W. Flint, Bruce H. Haughey, John K. Niparko, Mark A. Richardson, Valerie J. Lund, K. Thomas Robbins, Marci M. Lesperance, J. Regan Thomas (2010). Cummings Otolaryngology – Head and Neck Surgery: Head and Neck Surgery, 3-Volume Set . Elsevier Health Sciences. ISBN 9780323080873.
- ↑ Scheinfeld, Meir H.; Shifteh, Keivan; Avery, Laura L.; Dym, Harry; Dym, R. Joshua (2012). "Teeth: What Radiologists Should Know ". RadioGraphics 32 (7): 1927–1944. doi:. ISSN 0271-5333.
