Virtual Endoscopy of the Middle and Inner Ear

Neri, Emanuele; Cappelli, Carla; Caramella, Davide; Bartolozzi, Carlo; Berrettini, Stefano

doi:10.1007/978-3-642-18836-7_15

Cited by 6 publications

(13 citation statements)

References 14 publications

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“…Ipotimpano L'ipotimpano costituisce il comparto inferiore del cavo timpanico, si trova antero-inferiormente rispetto al retrotimpano: il suo limite superiore è un piano ideale passante per l'eminenza stiloidea di Politzer [4,5] (Fig. 1) [7].…”

Section: Methodsunclassified

“…Its upper limit is a virtual plane passing through the Politzer styloid eminence [4,5] (Fig. 1) and continuing to the inferior margin of the external acoustic meatus.…”

Section: Hypotympanummentioning

confidence: 99%

“…On the basis of its anatomical position, it can be subdivided into [4][5][6]: -Epitympanum (superior) -Protympanum (anterior) -Mesotympanum -Retrotympanum (posterior) -Hypotympanum (inferior)…”

Section: Axial and Coronal Ct Normal Anatomymentioning

confidence: 99%

“…Cenni di anatomia TC normale assiale e coronale L'orecchio medio è una cavità aerata di morfologia piuttosto irregolare, scavata nella rocca petrosa dell'osso temporale che, in considerazione della disposizione anatomica, è possibile suddividere in [4][5][6]:…”

Section: Retrotympanumunclassified

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Role of coronal oblique reconstruction as a complement to CT study of the temporal bone: normal anatomy

et al. 2006

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Coronal oblique MPR CT reformation should not be considered an alternative to the standard CT examination, but it can represent a valid integration to provide additional information on particularly crucial districts characterised by frequent involvement of inflammatory and/or expansile disease and because of their difficult endoscopic approach. Moreover, it can represent a meaningful aid to optimise surgical planning thanks to its different perspectives of observation.

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Section: Methodsunclassified

“…Its upper limit is a virtual plane passing through the Politzer styloid eminence [4,5] (Fig. 1) and continuing to the inferior margin of the external acoustic meatus.…”

Section: Hypotympanummentioning

confidence: 99%

Section: Axial and Coronal Ct Normal Anatomymentioning

confidence: 99%

Section: Retrotympanumunclassified

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Role of coronal oblique reconstruction as a complement to CT study of the temporal bone: normal anatomy

et al. 2006

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“…In comparison with most of the previous studies [1,2,4,6,[14][15][16] where virtual otoscopy was done in well-aerated ears with high inherent contrast between the density of the air and the ossicles, we attempted this imaging technique in cases of CSOM where the ossicular chain is buried in the mass of cholesteatoma. The technique was quite difficult and it was based only on the subtle difference between the density of the ossicles and that of the surrounding cholesteatoma.…”

Section: Discussionmentioning

confidence: 98%

Is there a role for virtual otoscopy in the preoperative assessment of the ossicular chain in chronic suppurative otitis media? Comparison of HRCT and virtual otoscopy with surgical findings

et al. 2009

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The aim of this study was to assess the role of virtual otoscopy and 3D ossicular reconstruction in the preoperative assessment of the ossicles in chronic suppurative otitis media. Thirty three patients of chronic suppurative otitis media with conductive deafness (air-bone gap > 35 dB) were included in this prospective study. All patients underwent axial multidetector CT. The axial CT data set was utilized for multiplanar 2D reformations as well as virtual otoscopy (VO) and 3D reconstructions. The imaging findings on these two techniques were read independently by two radiologists with respect to different parts of the ossicular chain by using a three-point scoring system and were compared with surgical findings. Both imaging techniques had comparable accuracy for evaluation of larger ossicular parts. However, for evaluation of stapes superstructure, VO/3D images were more accurate (85.29%) than 2D images (76.97%). Assessment of the lenticular process and incudostapedial joint by HRCT and 2D reformatted images was not reliable (P > 0.1); however, significant correlation (P < 0.001) was present between VO/3D and the operative findings. Virtual otoscopy improves evaluation of the ossicular chain particularly that of smaller structures such as the lenticular process, incudostapedial joint and stapes superstructure which may influence decisions regarding planning of ossiculoplasty.

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Detection of Labyrinthine Fistulas in Human Temporal Bone by Virtual Endoscopy and Density Threshold Variation on Computed Tomographic Scan

Bensimon¹,

Grayeli²,

Toupet³

et al. 2005

Arch Otolaryngol Head Neck Surg

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To assess the sensitivity of the routine computed tomographic (CT) scan of the temporal bone coupled to a virtual endoscopy, with density threshold variation, in detecting small fistulas in human temporal bone specimens. Design: Single-blind, before-after trial. Setting: This study was carried out in a research laboratory in collaboration with a radiology department. Patients: Five human adult temporal bone specimens were included. Interventions: The fistulas were created with calibrated burrs (0.3, 0.5, and 0.8 mm) in the 3 semicircular canals and in the promontory of 3 temporal bones. Two other temporal bones served as controls. All bones underwent CT scan (1-mm section thickness) before and after dissection. Three-dimensional images were obtained from CT scan native axial views at different density reconstruction thresholds. The virtual endoscope was placed in the middle ear cavity looking to the inner ear wall. The threshold at which a bony defect appeared on virtual endoscopic images (opening threshold in Hounsfield units [H]) was noted for each location. Main Outcome Measures: Opening thresholds before and after dissection.

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Virtual Endoscopy of the Middle and Inner Ear

Cited by 6 publications

References 14 publications

Role of coronal oblique reconstruction as a complement to CT study of the temporal bone: normal anatomy

Role of coronal oblique reconstruction as a complement to CT study of the temporal bone: normal anatomy

Is there a role for virtual otoscopy in the preoperative assessment of the ossicular chain in chronic suppurative otitis media? Comparison of HRCT and virtual otoscopy with surgical findings

Detection of Labyrinthine Fistulas in Human Temporal Bone by Virtual Endoscopy and Density Threshold Variation on Computed Tomographic Scan

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