Virtual Endoscopy of the Tympanic Cavity Based on High-resolution Multislice Computed Tomographic Data

Klingebiel, Randolf; Bauknecht, Hans-Christian; Kaschke, Oliver; Werbs, M.; Freigang, B.; Behrbohm, Hans; Rogalla, Patrik; Lehmann, Rüdiger

doi:10.1097/00129492-200111000-00015

Cited by 23 publications

(17 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Especially the Wrst three, widely used in the clinic, have been proved to be valuable, respectively [1][2][3][4][5][6][7][8][9][10][11]. However, there has been a dearth of literature on the comparison of the three protocols for the ossicles.…”

Section: Introductionmentioning

confidence: 99%

3D image of the middle ear ossicles: three protocols of post-processing based on multislice computed tomography

Zhang

Sha

Wang

et al. 2010

Eur Arch Otorhinolaryngol

View full text Add to dashboard Cite

The aim of this study was to examine and assess the comparative values of HRCT-based multiplanar reformation (MPR), volume rendering (VR) and virtual endoscope built on three-dimensional shaded-surface display (SSD-based CTVE) for evaluations of the ossicular chain. The normal pure tone audiograms, type-A tympanogram, and normal HRCT characteristics of 32 human ears of 18 patients were reviewed, whose ossicular chains were reconstructed with the three aforementioned protocols and assessed via the 3-point scoring system. The HRCT-based protocols could demonstrate a 3D image of the ossicular chain, except that of the footplate on the SSD-based CTVE. On the qualitative assessment, the efficacy of the MPR and VR, which were both superior to the SSD-based CTVE (P < 0.05), presented no statistical significance among the major and/or hyperdense structures (P > 0.05). As regards the lateral process of the malleus, VR was found to be significantly superior to the MPR and SSD-based CTVE (P < 0.05), both of which, however, showed no significant comparative differences (P > 0.05). Moreover, the three protocols in terms of efficacy were comparatively different in their representations of the anterior crus and footplates of the stapes, respectively (P < 0.05). On the MPR images, not all the images of the lenticular process were ideal; 20 of 32 cases were detected, but not defined. VR could be the more valuable protocol for the 3D reconstruction of the ossicular chain and ought to be more employed in future, especially for the education.

show abstract

Section: Introductionmentioning

confidence: 99%

3D image of the middle ear ossicles: three protocols of post-processing based on multislice computed tomography

Zhang

Sha

Wang

et al. 2010

Eur Arch Otorhinolaryngol

View full text Add to dashboard Cite

show abstract

“…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: 99%

“…The virtual eye is navigated through the 3D reconstruction to provide different views of the important anatomical structures which simulates traditional endoscopy and is quite comprehensive to the surgeons [1,2]. This imaging technique is particularly suited to study ossicular chain anomalies [3].…”

Section: Introductionmentioning

confidence: 99%

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

View full text Add to dashboard Cite

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.

show abstract

“…Weitere neuroradiologische Einsatzbereiche, neben der nativen und KM-gestützen kranialen CT, sind die zerebrale Perfusionsbildgebung, die hochauflösende Bildgebung der Schädelbasis [8,10] sowie die spinale CT-Diagnostik [20].…”

Section: Schlüsselwörterunclassified

“…Daher ist die zusammenhängende Befunddokumentation anhand von zwei-und dreidimensionalen Bildrekonstruktionen sinnvoll, neben dem Ausdruck weniger befundrelevanter Einzelbilder [8,17,18,19].…”

Section: Bildrekonstruktionunclassified

Einsatz der Mehrschicht-Spiral-CT in der neuroradiologischen Bildgebung

et al. 2002

Self Cite

View full text Add to dashboard Cite

Multislice computed tomography (MS-CT) was introduced into clinical radiology in 1999 and has shown a significant effect on various indications for computed tomography (CT) imaging in neuroradiology. Technical highlights of this new scanner type are the simultaneous data acquisition by up to four detector rows at present, an accelerated rotation time, and a reduction of the slice thickness to as low as 0.5 mm. These features account for an extended scan area, such as head and neck imaging in polytraumatized patients, detailed contrast-enhanced studies of the cervicocerebral vascular system from the carotid bifurcation to the vertex, as well as cerebral perfusion studies of a larger brain volume with an improved time resolution compared to established CT procedures. In addition, the diagnostic yield of the CT is increased with respect to several applications by reducing common image artefacts at the level of the cervicothoracic junction as well as those caused by metallic implants. Apart from improving the image quality of the primary cross-sectional slices, MS-CT significantly enhances two- and three-dimensional image reconstructions. Radiation protection is an important issue with MS-CT, especially when skull base imaging is considered.

show abstract

Virtual Endoscopy of the Tympanic Cavity Based on High-resolution Multislice Computed Tomographic Data

Abstract: MSCT data sets allow for generating virtual endoscopic views closely resembling otoendoscopic images. The technique is especially useful when ossicular pathologic changes are present as well as for preoperative and postoperative imaging of otologic procedures.

Cited by 23 publications

References 17 publications

3D image of the middle ear ossicles: three protocols of post-processing based on multislice computed tomography

3D image of the middle ear ossicles: three protocols of post-processing based on multislice computed tomography

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

Einsatz der Mehrschicht-Spiral-CT in der neuroradiologischen Bildgebung

Contact Info

Product

Resources

About