Table 2:

Pre- and postoperative cochlear duct length measurements with different radiation dose levels

Image Acquisition	Regular Dose		Low Dose		Ultra-Low Dose
Image Acquisition	Preop.	Postop.	Preop.	Postop.	Preop.	Postop.
CDL_OC (mm)
Mean	37.23	37.33	37.16	37.25	37.15	37.05
SD	2.66	2.72	2.56	2.62	2.71	2.64
95% CI	35.33–39.13	35.38–39.28	35.33–38.99	35.37–39.13	35.21–39.09	35.16–38.94
Range	7.40	7.40	6.80	7.10	7.20	7.20
Minimum	32.80	32.80	33.00	33.10	32.50	32.30
Maximum	40.20	40.20	39.80	40.20	40.30	39.50
CDL_LW (mm)
Mean	40.76	40.99	40.90	40.74	40.88	40.96
SD	2.73	2.88	2.58	2.72	2.61	2.57
95% CI	38.81–42.71	38.93–43.05	39.06–42.74	38.79–42.69	39.02–42.74	39.12–42.80
Range	8.40	8.90	8.00	8.40	7.70	7.50
Minimum	36.10	35.90	36.60	35.80	36.70	36.50
Maximum	44.50	44.80	44.60	44.20	44.40	44.00