scholarly journals The Membranous Labyrinth in vivo from High-Resolution Temporal Bone CT Data

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Tanioka Hisaya ◽  
Tanioka Sayaka
Keyword(s):  
High Resolution ◽  
Temporal Bone ◽  
Membranous Labyrinth ◽  
Temporal Bone Ct ◽  
Ct Data

scholarly journals The Membranous Labyrinth in vivo from high-resolution Temporal CT data

2018 ◽  
Author(s):  
Hisaya Tanioka
Keyword(s):  
High Resolution ◽  
Inner Ear ◽  
Human Subjects ◽  
Membranous Labyrinth ◽  
3D Images ◽  
Temporal Bone Ct ◽  
Normal Human ◽  
Ct Data ◽  
Good Agreement

A prerequisite for the modeling and understanding of the inner ear mechanics needs the accurate created membranous labyrinth. I present a semi-automated methodology for accurate reconstruction of the membranous labyrinth in vivo from high-resolution temporal bone CT data of normal human subjects. I created the new technique which was combined with the segmentation methodology, transparent, thresholding, and opacity curve algorithms. This technique allowed the simultaneous multiple image creating without any overlapping regions in the inner ear has been developed. The reconstructed 3D images improved the membranous labyrinth geometry to realistically represent physiologic dimensions. These generated membranous structures were in good agreement with the published ones, while this approach was the most realistic in terms of the membranous labyrinth. The precise volume rendering depends on proprietary algorithms so that different results can be obtained, and the images appear qualitatively different. For each anatomical question, a different visualization technique should be used to obtain an optimal result. All scientists can create the membranous labyrinth in vivo in real time like a retinal camera.

Three-dimensional reconstruction based on images from spiral high-resolution computed tomography of the temporal bone: anatomy and clinical application

2005 ◽  
Vol 119 (9) ◽  
pp. 693-698 ◽  
Author(s):  
Beom-Cho Jun ◽  
Sun-Wha Song ◽  
Ju-Eun Cho ◽  
Chan-Soon Park ◽  
Dong-Hee Lee ◽  
...  
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
3D Reconstruction ◽  
Temporal Bone ◽  
Three Dimensional ◽  
Image Data ◽  
Computer Assisted ◽  
Surface Rendering ◽  
High Resolution Computed Tomography

The aim of this study was to investigate the usefulness of a three-dimensional (3D) reconstruction of computed tomography (CT) images in determining the anatomy and topographic relationship between various important structures. Using 40 ears from 20 patients with various otological diseases, a 3D reconstruction based on the image data from spiral high-resolution CT was performed by segmentation, volume-rendering and surface-rendering algorithms on a personal computer. The 3D display of the middle and inner ear structures was demonstrated in detail. Computer-assisted measurements, many of which could not be easily measured in vivo, of the reconstructed structures provided accurate anatomic details that improved the surgeon’s understanding of spatial relationships. A 3D reconstruction of temporal bone CT might be useful for education and increasing understanding of the anatomical structures of the temporal bone. However, it will be necessary to confirm the correlation between the 3D reconstructed images and histological sections through a validation study.

scholarly journals Unilateral internal auditory canal stenosis with progressive facial weakness

2012 ◽  
Vol 18 (2) ◽  
pp. 179-182
Author(s):  
Sathiya Murali ◽  
Arpana Shekhar ◽  
S Shyam Sudhakar ◽  
Kiran Natarajan ◽  
Mohan Kameswaran
Keyword(s):  
Hearing Loss ◽  
High Resolution ◽  
Facial Nerve ◽  
Temporal Bone ◽  
Internal Auditory Canal ◽  
Facial Weakness ◽  
Profound Hearing Loss ◽  
Canal Stenosis ◽  
Temporal Bone Ct ◽  
Magnetic Resonance Imaging Mri

Internal auditory canal (IAC) stenosis is a rare cause of sensorineural hearing loss. Patient may present with symptoms of progressive facial nerve palsy, hearing loss, tinnitus and giddiness. High resolution temporal bone CT-scan and magnetic resonance imaging (MRI) are the important tools for diagnosis. No specific management has been devised. Here is presentation of a case of unilateral (left) IAC stenosis with profound hearing loss and progressive House Brackmann Grade III-IV facial weakness. The diameter of the IAC was less than 2 mm on high resolution temporal bone computed tomography (HRCT) scan. It was managed by facial nerve decompression by translabyrinthine approach in an attempt to prevent further deterioration of facial palsy. DOI: http://dx.doi.org/10.3329/bjo.v18i2.12014 Bangladesh J Otorhinolaryngol 2012; 18(2): 179-182

scholarly journals Localization of active otosclerotic foci by tympano-cochlear scintigraphy (TCS) using correlative imaging

1995 ◽  
Vol 109 (11) ◽  
pp. 1051-1056 ◽  
Author(s):  
Uwe H. Ross ◽  
M. J. Reinhard ◽  
Berlis A.
Keyword(s):  
High Resolution ◽  
Temporal Bone ◽  
Activity Patterns ◽  
Experimental Studies ◽  
Petrous Bone ◽  
X Rays ◽  
Correlative Imaging ◽  
Human Temporal Bone ◽  
Detection And Localization

AbstractHigh-resolution, tympano-cochlear scintigraphy (TCS) is a useful tool for visualizing changes in labyrinthine bone metabolism in active otosclerosis in vivo. But until now, the activity patterns have mostly been rather imprecisely ascribed to the labyrinthine structures; more exactly by means of high- resolution CT (HR-CT). Experimental studies on TCS using a human temporal bone model revealed that correlative imaging of X-ray photographs and the scintigrams or superimposition with masks of the temporal bone drawn from the X-rays can facilitate the localization of small foci of about 0.5–1 mm.Clinical applications of the visualization technique, combining functional with structural images, confirmed the benefit of this method, improving the accuracy in detection and localization of focal activity enrichment of the petrous bone in cases of active otosclerosis by means of TCS.

Temporal Bone Computed Tomography in the Preoperative Evaluation for Cochlear Implantation

1989 ◽  
Vol 98 (5) ◽  
pp. 346-349 ◽  
Author(s):  
Donald P. Mueller ◽  
Kenneth D. Dolan ◽  
Bruce J. Gantz
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
Temporal Bone ◽  
Cochlear Implantation ◽  
Preoperative Evaluation ◽  
Operative Procedure ◽  
High Resolution Computed Tomography ◽  
Adequate Knowledge ◽  
Temporal Bone Ct ◽  
Selection Of

High resolution computed tomography of the temporal bone is performed routinely in the preoperative evaluation for cochlear implantation. A retrospective review was performed to determine the effect of these studies. The clinical significance was determined through consultation with the referring otolaryngologist and review of the operative reports. Twelve examinations were reviewed. Abnormalities were identified in 12 of the 24 ears examined (eight of 12 patients studied). In two patients the CT examination strongly influenced the selection of the ear to be implanted. In four additional cases information felt to be useful in preoperative planning was provided. Useful information related to potential complications with the mechanical insertion of the electrode apparatus. We conclude that temporal bone abnormalities are common in the population undergoing cochlear implantation and that high resolution temporal bone CT is essential in preoperative evaluation. The CT scan should be interpreted with adequate knowledge of the operative procedure to evaluate any possible barriers to the mechanical insertion of the internal components of the system.

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