The incidence of tympanogenic labyrinthitis ossificans

2014 ◽  
Vol 128 (7) ◽  
pp. 618-620 ◽  
Author(s):  
H-Y Lin ◽  
Y-K Fan ◽  
K-C Wu ◽  
M-T Shu ◽  
C-C Yang ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Head And Neck Cancer ◽  
Cochlear Implants ◽  
Semicircular Canal ◽  
Lateral Semicircular Canal ◽  
Posterior Semicircular Canal ◽  
High Resolution Computed Tomography ◽  
Labyrinthitis Ossificans ◽  
Computed Tomography Scans ◽  
History Of

AbstractObjective:To estimate the incidence of tympanogenic labyrinthitis ossificans.Methods:The records of patients treated with mastoidectomy for various tympanogenic aetiologies from January 2007 to December 2011 were retrospectively reviewed. Patients whose high-resolution computed tomography scans showed evidence of labyrinthine calcification of the temporal bone were enrolled. Patients with a history of head and neck cancer, meningitis, and otosclerosis, and patients with cochlear implants, were excluded from this study.Results:A total of 195 patients were enrolled in this study; 4 of the patients presented with calcification in the inner ear. Therefore, the incidence of tympanogenic labyrinthitis ossification was 2 per cent. The computed tomography findings revealed: (1) cochlear calcifications of the basal and middle turn in two patients; and (2) vestibular, superior semicircular canal, posterior semicircular canal and lateral semicircular canal calcification in one, four, three and two patients, respectively.Conclusion:The incidence of tympanogenic labyrinthitis ossification in patients who had undergone a mastoidectomy was 2 per cent.

Biometry of the normal stapes using stapes axial plane, high-resolution computed tomography

2014 ◽  
Vol 128 (5) ◽  
pp. 425-430 ◽  
Author(s):  
J Rousset ◽  
M Garetier ◽  
J-C Gentric ◽  
S Chinellato ◽  
C Barberot ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Retrospective Study ◽  
Semicircular Canal ◽  
Axial Plane ◽  
Lateral Semicircular Canal ◽  
High Resolution Computed Tomography ◽  
Computed Tomography Scans ◽  
Joint Width ◽  
Plane Versus ◽  
Incudostapedial Joint

AbstractObjective:The stapes is difficult to analyse on computed tomography because of the small size of its components and its oblique orientation. The stapes axial plane, parallel to the superstructure, seems optimal for this purpose. The present study assessed the position of the stapes axial plane with respect to the usual axial plane including the lateral semicircular canal, and sought to measure the main dimensions of the stapes.Methods:This retrospective study comprised 208 computed tomography scans of normal ears. Stapes length and width, footplate thickness and incudostapedial joint width were measured.Results:The stapes axial plane was directed upward, outward (44°) and forward (12°) with respect to the lateral semicircular canal plane. Mean head-to-footplate distance was 3.7 mm and mean superstructure width was 2.7 mm. Mean footplate thickness was 0.27 mm on stapes axial plane versus 0.48 mm on lateral semicircular canal plane. Incudostapedial joint width was systematically less than 0.7 mm.Conclusion:Stapes dimensions on stapes axial plane were close to anatomical data, particularly for footplate thickness.

Interpreting pre-operative mastoid computed tomography images: comparison between operating surgeon, radiologist and operative findings

2016 ◽  
Vol 130 (1) ◽  
pp. 32-37 ◽  
Author(s):  
K Badran ◽  
S Ansari ◽  
R Al Sam ◽  
Y Al Husami ◽  
A Iyer
Keyword(s):  
Computed Tomography ◽  
Temporal Bone ◽  
Semicircular Canal ◽  
Lateral Semicircular Canal ◽  
Predictive Values ◽  
Computed Tomography Images ◽  
Computed Tomography Scanning ◽  
Significant Difference ◽  
Computed Tomography Scans ◽  
Operative Findings

AbstractObjectives:This study aimed to compare the interpretations of temporal bone computed tomography scans by an otologist and a radiologist with a special interest in temporal bone imaging. It also aimed to determine the usefulness of this imaging modality.Methods:A head and neck radiologist and an otologist separately reported pre-operative computed tomography images using a structured proforma. The reports were then compared with operative findings to determine their accuracy and differences in interpretations.Results:Forty-eight patients who underwent pre-operative computed tomography scans in a 30-month period were identified. Six patients were excluded because complete operative findings had not been recorded. Positive and negative predictive values and accuracy of the anatomical and pathological findings were calculated for 42 patients by both reporters. The accuracy was found to be less than 80 per cent, except for identification of the tegmen and lateral semicircular canal erosion. Overall, there was no significant difference in interpretations of computed tomography scans between reporters. There was a slight difference in interpretation for tympanic membrane retraction, facial canal erosion and lateral semicircular canal fistula and/or erosion.Conclusion:Pre-operative computed tomography scanning of the temporal bone is useful for predicting anatomy for surgical planning in patients with chronic otitis media, but its reliability remains questionable.

scholarly journals Comparative Study of Preoperative Radiological Findings with Intraoperative Surgical Findings in Squamosal Type of Chronic Otitis Media

2021 ◽  
Vol 10 (25) ◽  
pp. 1862-1865
Author(s):  
Sanjana Pradeep ◽  
Swaroop Dev ◽  
Jyothi Swarup Raju ◽  
Shravya Pasunuti
Keyword(s):  
Temporal Bone ◽  
Otitis Media ◽  
Semicircular Canal ◽  
Chronic Otitis Media ◽  
Sigmoid Sinus ◽  
Lateral Semicircular Canal ◽  
High Resolution Computed Tomography ◽  
Tissue Mass ◽  
Hrct Temporal Bone ◽  
A Prospective Study

BACKGROUND Chronic otitis media (COM) of squamosal type is associated with cholestatoma with potential complications. Clinical examination and high resolution computed tomography (HRCT) scans are necessary to assess the disease site and extension. The purpose of the study was to compare the preoperative HRCT findings with the intraoperative surgical findings in squamosal type of chronic otitis media as well as various parameters in HRCT temporal bone and intraoperative findings. METHODS A prospective study was conducted on 30 patients aged between 18 and 60 years of both the genders who presented with chronic otitis media squamosal type, for a period of 22 months who attended the outpatient department of ENT. RESULTS HRCT findings and intraoperative findings were compared and results were analysed. Facial canal erosion (P - 0.0031), tegmen plate erosion (P - 0.0001), sigmoid sinus plate erosion (P - 0.002) were found to be statistically significant. Lateral semicircular canal fistula (P - 0.36) and ossicular status malleus (P - 1.000), incus (P - 0.949), stapes suprastructure (P - 0.984), and stapes footplate erosion (P - 0.977) were found to be statistically insignificant. CONCLUSIONS In our study, HRCT imaging for COM squamosal type, accurately depicted the soft tissue mass, erosion of tegmen plate, sigmoid sinus plate, scutum, lateral semicircular canal fistula, incus and suprastructure of stapes erosion and the same were found intraoperatively as well. Our study showed good comparison between the preoperative HRCT scans and the surgical findings in cholesteatoma cases. HRCT is confirmed to be valuable in the diagnosis and in guiding the surgical management of cholesteatoma. KEY WORDS Chronic Otitis Media, Cholesteatoma, HRCT Temporal Bone, Modified Radical Mastoidectomy

Pre-operative high resolution computed tomography scans for cholesteatoma: Has anything changed?

2014 ◽  
Vol 35 (4) ◽  
pp. 508-513 ◽  
Author(s):  
Jia Hui Ng ◽  
Edward Zhiyong Zhang ◽  
Sue Rene Soon ◽  
Vanessa Yee Jueen Tan ◽  
Tiong Yong Tan ◽  
...  
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
High Resolution Computed Tomography ◽  
Computed Tomography Scans

scholarly journals A re-description of Sandownia harrisi (Testudinata: Sandownidae) from the Aptian of the Isle of Wight based on computed tomography scans

2020 ◽  
Vol 7 (2) ◽  
pp. 191936 ◽  
Author(s):  
Serjoscha W. Evers ◽  
Walter G. Joyce
Keyword(s):  
Computed Tomography ◽  
Late Jurassic ◽  
Morphological Evolution ◽  
Sister Group ◽  
High Resolution Computed Tomography ◽  
Isle Of Wight ◽  
Arterial Circulation ◽  
Computed Tomography Scanning ◽  
Secondary Palate ◽  
History Of

Sandownidae is an enigmatic group of Cretaceous–Paleogene turtles with highly derived cranial anatomy. Although sandownid monophyly is not debated, relationships with other turtles remain unclear. Sandownids have been recovered in significantly different parts of the turtle tree: as stem-turtles, stem-cryptodires and stem-chelonioid sea turtles. Latest phylogenetic studies find sandownids as the sister-group of the Late Jurassic thalassochelydians and as stem-turtles. Here, we provide a detailed study of the cranial and mandibular anatomy of Sandownia harrisi from the Aptian of the Isle of Wight, based on high resolution computed tomography scanning of the holotype. Our results confirm a high number of anatomical similarities with thalassochelydians and particularly Solnhofia parsonsi , which is interpreted as an early member of the sandownid lineage. Sandownids + Solnhofia show many cranial modifications related to the secondary palate and a durophagous diet. Sandownia is additionally highly derived in features related to its arterial circulation and neuroanatomy, including the endosseous labyrinth. Our results imply rapid morphological evolution during the early history of sandownids. Sandownids likely evolved in central Europe from thalassochelydian ancestors during the Late Jurassic. The durophagous diet of sandownids possibly facilitated their survival of the Cretaceous/Paleogene mass extinction.

scholarly journals Complete Disappearance of Lung Abnormalities on High-Resolution Computed Tomography: A Case of Histiocytosis X

2007 ◽  
Vol 14 (4) ◽  
pp. 235-237 ◽  
Author(s):  
Sergio Negrin-Dastis ◽  
Dominique Butenda ◽  
Jacques Dorzee ◽  
Jacques Fastrez ◽  
Jean-Paul d’Odémont
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
Lung Biopsy ◽  
Langerhans Cell Histiocytosis ◽  
Complete Disappearance ◽  
High Resolution Computed Tomography ◽  
Pulmonary Langerhans Cell Histiocytosis ◽  
Lung Abnormalities ◽  
Computed Tomography Scans

A case of pulmonary Langerhans cell histiocytosis, proved by both lung high-resolution computed tomography and lung biopsy, is described. Following smoking cessation, lung nodules and cysts gradually disappeared on serial computed tomography scans, with complete clearance of the lesions after 12 months. The role of tobacco smoking is discussed, in detail, against the background of the literature.

scholarly journals Use of Computed Tomography Scans for Cochlear Implants

2007 ◽  
Vol 21 (3) ◽  
pp. 323-328 ◽  
Author(s):  
Bruce R. Whiting ◽  
Timothy A. Holden ◽  
Barry S. Brunsden ◽  
Charles C. Finley ◽  
Margaret W. Skinner
Keyword(s):  
Computed Tomography ◽  
Cochlear Implants ◽  
Computed Tomography Scans

Precurved Cochlear Implants and Tip Foldover: A Cadaveric Imaging Study

2017 ◽  
Vol 158 (2) ◽  
pp. 343-349 ◽  
Author(s):  
Danielle R. Trakimas ◽  
Elliott D. Kozin ◽  
Iman Ghanad ◽  
Sam R. Barber ◽  
Hugh Curtin ◽  
...  
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
Cochlear Implants ◽  
Electrode Array ◽  
Imaging Study ◽  
Plain Film ◽  
Plain Radiography ◽  
Electrode Placement ◽  
High Resolution Computed Tomography ◽  
Plain Film Radiography

Objective This study aims to define a reliable protocol for radiographic identification of placement and tip foldover of newly designed precurved and straight electrodes. Study Design Prospective imaging study. Setting Academic institution. Methods Three models of cochlear implants (Cochlear, MED-EL, and Advanced Bionics) were inserted into fresh cadaveric specimens (n = 2) in 3 configurations (normal positioning in the scala tympani, intracochlear tip foldover, and placement into the vestibular system) for a total of 9 implant scenarios. Specimens were imaged with plain radiography in Stenvers projection, as well as by high-resolution computed tomography. Results Electrode placement and presence or absence of electrode tip foldover were easily identified in all 9 scenarios on plain radiography based on the described technique. Each was confirmed with high-resolution computed tomography. Plain film temporal bone images of new electrode designs with proper and improper placement are provided for reference. Conclusion A defined protocol for intraoperative plain film radiography allowed for reliable imaging of 3 newly designed cochlear implant electrodes and immediate identification of extracochlear placement and tip foldover. Findings may be used for intraoperative confirmation of electrode array placement.

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