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Table 5: Dehiscence measurement in FIESTA MRI and high-resolution CT
Cases of Superior/Posterior Semicircular Canal Dehiscence MRI (mm) CT (mm)
On MRI and CT 
    SSCD1 5.1 3.6
    SSCD2 3.2 1
    SSCD3 7 3.8
    SSCD4 2.9 2,5
    SSCD5 3.3 2
    SSCD6 5 2.8
    SSCD7 1.7 2.5
    SSCD8 2.6 3.5
    SSCD9 4.6 3.7
    SSCD10 4.3 1.5
    SSCD11 4.3 1
    PSCD1 1,5 1.5
    Mean dehiscence length (mm) 3.8^{^a} 2.5
    P value .009 
On FIESTA only 
    SSCD12 4.1 No dehiscence
    SSCD13 4.4 No dehiscence
    SSCD14 2.3 No dehiscence
    SSCD15 2.6 No dehiscence
    SSCD16 4.2 No dehiscence
    SSCD17 1.1 No dehiscence
    SSCD18 4.2 No dehiscence
    PSCD2 1.5 No dehiscence
    PSCD3 1.7 No dehiscence
    Mean dehiscence length (mm) 2.9^{^a} 
Note:—SSCD indicates superior semicircular canal dehiscence; PSCD, posterior semicircular canal dehiscence.
↵a Mean dehiscence length on FIESTA when present on CT was 3.9 mm. Mean dehiscence length on FIESTA when absent on CT was 2.9 mm. The difference between these 2 values is not statistically significant (P = .18).

Cases of Superior/Posterior Semicircular Canal Dehiscence	MRI (mm)	CT (mm)
On MRI and CT
SSCD1	5.1	3.6
SSCD2	3.2	1
SSCD3	7	3.8
SSCD4	2.9	2,5
SSCD5	3.3	2
SSCD6	5	2.8
SSCD7	1.7	2.5
SSCD8	2.6	3.5
SSCD9	4.6	3.7
SSCD10	4.3	1.5
SSCD11	4.3	1
PSCD1	1,5	1.5
Mean dehiscence length (mm)	3.8^{^a}	2.5
P value	.009
On FIESTA only
SSCD12	4.1	No dehiscence
SSCD13	4.4	No dehiscence
SSCD14	2.3	No dehiscence
SSCD15	2.6	No dehiscence
SSCD16	4.2	No dehiscence
SSCD17	1.1	No dehiscence
SSCD18	4.2	No dehiscence
PSCD2	1.5	No dehiscence
PSCD3	1.7	No dehiscence
Mean dehiscence length (mm)	2.9^{^a}