M. Fujimoto et al., COMPUTER-GENERATED 3-DIMENSIONAL RECONSTRUCTION OF THE BONY LABYRINTHIN MONDINIS DYSPLASIA, Acta medica Okayama, 48(1), 1994, pp. 57-61
The bony labyrinth obtained at necropsy in four cases was studied by a
new computer-generated three-dimensional (3-D) system. One case was n
ormal (control) and the other three were histopathologically confirmed
cases of Mondini's dysplasia. In case 1, the cochlea had only 2 turns
and the lateral semicircular canal did not make a circle but appeared
as a spherical mass projecting from the utricle even though the poste
rior semicircular canal made a normal circle. In case 2, there were no
turns in the cochlea even though the semicircular canals and the vest
ibule appeared normal. In case 3, the cochlea showed 1 to 1 and 1/2 tu
rns and the semicircular canals were premature showing only bud-like p
rojections. This 3-D imaging system, which utilizes the toggling metho
d, provides a way of obtaining satisfactory images without markers, an
d the time required to obtain these 3-D images was reduced by using a
video camera instead of a digitizer. One of the problems associated wi
th the use of 3-D imaging is the long processing time. We resolved thi
s by inputting the section images with a video camera and by picking u
p structures using density segmeatation instead of tracing with a digi
tizer.