Minute findings of inner ear anomalies by three-dimensional CT scanning

Isono, Michio; Murata, Kiyotaka; Aiba, Kazuko; Miyashita, Hiroaki; Tanaka, Hisaya; Ishikawa, Masahiro

doi:10.1016/s0165-5876(97)00110-9

Cited by 24 publications

(16 citation statements)

References 1 publication

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“…Computerized tomography and SCT have been proved powerful tools in imaging the middle and inner ear because they are capable of providing clear images of high-density and high-contrast tissue such as the bone labyrinth, the auditory ossicle and the internal acoustic meatus. However, neither one can generate images of the soft tissue simultaneously including the membrane labyrinth, lymph and nerve (Hermans et al 1995;Isono et al 1997;Shibata and Nagano et al 1996;Himi et al 1996;Hu 1999). Although MRI, to some extent, can compensate uniquely by imaging the soft tissue, it cannot gather the intact information of the cochlea (Barbara et al 1996;Dahm et al 1997;Nakashima et al 2002;Neri et al 2000).…”

Section: Discussionmentioning

confidence: 99%

A detailed 3D model of the guinea pig cochlea

et al. 2007

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Several partial models of cochlear subparts are available. However, a complete 3D model of an intact cochlea based on actual histological sections has not been reported. Hence, the aim of this study was to develop a novel 3D model of the guinea pig cochlea and conduct post-processes on this reconstructed model. We used a combination of histochemical processing and the method of acquiring section data from the visible human project (VHP) to obtain a set of ideal raw images of cochlear sections. After semi-automatic registration and accurate manual segmentation with professional image processing software, one set of aligned data and six sets of segmented data were generated. Finally, the segmented structures were reconstructed by 3D Slicer (a professional imaging process and analysis tool). Further, post-processes including 3D visualization and a virtual endoscope were completed to improve visualization and simulate the course of the cochlear implant through the scala tympani. The 3D cochlea model contains the main six structures: (1) the inner wall, (2) modiolus and spiral lamina, (3) cochlea nerve and spiral ganglion, (4) spiral ligament and inferior wall of cochlear duct, (5) Reissner's membrane and (6) tectorial membrane. Based on the results, we concluded that ideal raw images of cochlear sections can be acquired by combining the processes of conventional histochemistry and photographing while slicing. After several vital image processing and analysis steps, this could further generate a vivid 3D model of the intact cochlea complete with internal details. This novel 3D model has great potential in teaching, basic medical research and in several clinical applications.

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Section: Discussionmentioning

confidence: 99%

A detailed 3D model of the guinea pig cochlea

et al. 2007

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“…Beginning with plain X-ray, technology in the field of diagnostic imaging developed from multidirectional tomography to high-resolution CT of the temporal bone and then MRI, enabling the detailed visualization of inner ear structures (5,6). There have also been reports of applying three-dimensional CT to diagnose subtle inner ear malformations, which could not be detected by two-dimensional examination (7,8). However, the disadvantage of X-ray images of the inner ear is they do not reflect beyond the bony labyrinth and they do not depict the membranous labyrinth, the natural statoacoustic organ.…”

Section: Three-dimensional Magnetic Resonance Imaging Findingsmentioning

confidence: 99%

Three-dimensional Magnetic Resonance Imaging Findings of Inner Ear Anomaly

Miyashita

Isono²,

Murata³

et al. 2000

Acta Oto-Laryngologica

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M. Three-dimensional magnetic resonance imaging findings of inner ear anomaly. Acta Otolaryngol 2000; Suppl 542: 67 -70.Using three-dimensional magnetic resonance imaging (3D-MRI), the membranous labyrinth was examined in normal cases and in a case with bilateral Mondini-type inner ear malformations. Both ears were also examined by high-resolution computed tomography (CT) of the temporal bone. 3D-MRI provided more detail than findings obtained by conventional high-resolution CT and it enabled 3D observations to be made. Detailed examination of maximum intensity projection images along the cochlea axis revealed the cochlear turns in three dimensions.

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“…The normal range for the diameter of the endolymphatic duct would be 0.1-1.4 mm [9]. Perhaps three-dimensional imaging techniques will bring the answer in the future [10].…”

Section: Diagnosismentioning

confidence: 99%

The Large Vestibular Aqueduct Syndrome as a Cause for Sudden Deafness in Children

Riley¹,

Stokroos²,

Manni³

1998

Otorhinolaryngol Nova

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A case report and a review of the literature on the ‘large vestibular aqueduct syndrome’ are presented. This syndrome purports to be a large vestibular aqueduct with a sensorineural or combined sensorineural and conductive hearing loss. The vestibular aqueduct has retained its wide embryologic size. Although indications have been found supporting a possible genetic origin for the persistence of the large aqueduct, many questions remain on the development of the hearing loss. Once the diagnosis is suspected, an MRI or CT scan will reveal the large vestibular aqueduct. Operations proposed to stop the decline of the hearing or even to improve it, have not been successful to date. For this reason, these patients mostly rely on revalidation.

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Minute findings of inner ear anomalies by three-dimensional CT scanning

Cited by 24 publications

References 1 publication

A detailed 3D model of the guinea pig cochlea

A detailed 3D model of the guinea pig cochlea

Three-dimensional Magnetic Resonance Imaging Findings of Inner Ear Anomaly

The Large Vestibular Aqueduct Syndrome as a Cause for Sudden Deafness in Children

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