Table 3. Clinically relevant dimensions obtained from measurements on the micro-CT and OCT volumes of the cadaveric middle ear [46]. ISJ, incudostapedial joint; TM, tympanic membrane; RMSE, root mean squared error.

Measurement	ISJ to Umbo		ISJ to Promontory		Umbo to Promontory		ISJ to TM
Modality	OCT	Micro-CT	OCT	Micro-CT	OCT	Micro-CT	OCT	Micro-CT
Mean ( $\mathit{m}\mathit{m}$ )	2.813	2.798	2.007	1.999	1.610	1.577	1.869	NA
Standard deviation ( $\mathit{\mu }\mathit{m}$ )	36	51	44	64	38	79	27	NA
RMSE ( $\mathit{\mu }\mathit{m}$ )	60		52		75		NA