Comparison of 45° Oblique Reformats with Axial Reformats in CT Evaluation of the Vestibular Aqueduct

Özgen, Burçe; Cunnane, Mary E.; Caruso, Pietro; Curtin, Hugh D.

doi:10.3174/ajnr.a0735

Cited by 37 publications

(19 citation statements)

References 16 publications

(24 reference statements)

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“…The Stenvers projection is the plane parallel to the long axis of the petrous bone, and the Pöschl projection is the plane perpendicular to the long axis of the petrous bone. These additional planes are useful for evaluating the structures of the middle and inner ear, which may not be as well seen in the standard axial and coronal planes (2). Magnetic resonance (MR) imaging may be used to evaluate the eighth cranial nerve, which is typically best seen on heavily T2-weighted images in the axial and oblique projections.…”

Section: Techniquementioning

confidence: 99%

Interactive Web-based Learning Module on CT of the Temporal Bone: Anatomy and Pathology

et al. 2012

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An interactive Web-based learning module on the temporal bone has been developed. It shows normal temporal bone anatomy in four imaging planes: axial, coronal, and parallel and perpendicular to the long axis of the petrous bone. After reviewing the normal anatomy, users should be able to identify key imaging features of pathologic conditions of the temporal bone. Children with congenital abnormalities of the temporal bone may present with conductive or sensorineural hearing loss or both and may have a genetic syndrome. Acute otitis media is the most common infection of the temporal bone and is most prevalent among children. Although imaging is unnecessary in uncomplicated otitis media, it is important for evaluation of infectious complications. Classically, temporal bone fractures were described as longitudinal or transverse with respect to the long axis of the petrous bone. However, it is increasingly recognized that many fractures have both longitudinal and transverse components. Patients with temporal bone fractures may have conductive or sensorineural hearing loss in addition to other complications. The most common tumor of the temporal bone at the cerebellopontine angle is the vestibular schwannoma. Paraganglioma is the second most common tumor of the temporal bone and the most common tumor of the middle ear. Supplemental material available at http://uwmsk.org/temporalbone/atlas.html.

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Section: Techniquementioning

confidence: 99%

Interactive Web-based Learning Module on CT of the Temporal Bone: Anatomy and Pathology

et al. 2012

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“…On the contrary, the axial plane is able to detect EVA, but some Authors [18] proposed that 458 oblique plane could give a more reliable depiction of the vestibular aqueduct than the axial plane, especially in cases of borderline enlargement of the vestibular aqueduct. Therefore, the Pö schl projection is necessary for SSCD diagnosis, but also very useful for EVA detection.…”

Section: Discussionmentioning

confidence: 96%

Superior semicircular canal dehiscence and enlarged vestibular aqueduct

Brandolini

Modugno

2011

International Journal of Pediatric Otorhinolaryngology

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“…This plane was chosen because it allows more reliable and accurate depiction of the vestibular aqueduct along its longitudinal axis compared with the axial plane. 6 This follows the basic geometric principle that the optimal planes for displaying a symmetric structure are planes parallel and perpendicular to its main axes of symmetry. Because the vestibular aqueduct is a channel oriented essentially 45°from the sagittal and coronal planes, running from posteroinferior to anterosuperior, the 45°oblique (Pöschl) plane is ideal for displaying the entire length of this structure.…”

Section: Discussionmentioning

confidence: 99%

“…In particular, the 45°oblique (Pöschl) plane has been shown to depict the vestibular aqueduct more reliably than the axial plane because this plane is parallel to the longitudinal axis of the vestibular aqueduct, and this plane allows depiction of virtually the entire length of this structure. 6,7 Evaluation of the vestibular aqueduct in this plane allows accurate identification of its midpoint and determination of its true cross-sectional width without overestimation related to obliquity (Fig 1). In this study, we aimed to determine normal measurements for the vestibular aqueduct midpoint width based on the 45°o blique plane.…”

mentioning

confidence: 99%