![which is right and left on sagittal ct which is right and left on sagittal ct](https://media.springernature.com/lw685/springer-static/image/art%3A10.1007%2Fs00134-020-06118-y/MediaObjects/134_2020_6118_Fig1_HTML.jpg)
They are commonly found in dentist offices, but so far, have not been favored in hospital settings. Be extra cautious in scanning children, as radiation exposure increases cancer risk, and children have a long life expectancy (Tunkel et al, 2012).Īn exception to the general rule that temporal bone CT scans are "high radiation" are "cone beam CT scans". If you are going to do it - do it right the first time. you don't start with a poor scan, and then get a good one. CT scans also should not be done in a "successive approximation" mode - i.e. Safe tests such as the VEMP should be used first. Accordingly, CT scans should not be done to "screen" for SCD. Note that most temporal bone CT scans are "high radiation" procedures because enough Xray energy must be used to "see" into a very hard bone (temporal bone). As SCD is a type of canal fistula and it is moderatelyĬommon (about 2% of population), the main reason for this procedure is to check for SCD. In identifying canal fistulae (Fuse et al, 1996). CT of the temporal bone is supposedly very accurate General comments about temporal bone CTs:Ī CT scan of the temporal bone or SCD is generally obtained in persons with sound or pressure sensitivity. a VEMP test), and where surgery is a possibility, as otherwise there is some risk (radiation) without great benefit. The CT-temporal bone is the "gold standard" for SCD, but because there is considerable radiation, it is best to save it fo situations where there is both lab evidence (i.e. See the second half of this page for MRI to suggest or rule out SCD. A good idea whether bone is missing or not can also be obtained from a 3T coronal T2 MRI (Browaeys et al, 2013).
![which is right and left on sagittal ct which is right and left on sagittal ct](https://www.medmastery.com/sites/default/files/G54_article01_figure-06_0.png)
The missing bone is identified using high-resolution CT scan.
![which is right and left on sagittal ct which is right and left on sagittal ct](https://media.springernature.com/lw685/springer-static/image/art%3A10.1038%2Fs41598-018-34458-9/MediaObjects/41598_2018_34458_Fig2_HTML.png)
Of the superior semicircular canal is missing. This is written mainly for physicians who are ordering CT scans to diagnose SCD.Ĭanal dehiscence" syndrome, or SCD, the roof The rationale for using reformatted axial cuts.