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Visualization of anterior skull base defects with intraoperative cone-beam CT

Visualization of anterior skull base defects with intraoperative cone-beam CT
Visualization of anterior skull base defects with intraoperative cone-beam CT
Background: the role of cone-beam CT (CBCT) in demonstrating anterior skull base defects (ASBDs), differing in size and location, was investigated. The study was designed to describe the potential advantage of CBCT in the setting of an intraoperative cerebrospinal fluid (CSF) leak.

Methods: in all, 120 ASBD were evaluated in 5 cadaver heads. Orthogonal and oblique slices were reconstructed. Observer studies assessed the visibility of ASBD in each location as a function of defect size.

Results: for 1-, 2-, and 4-mm defects, the percentage that were undetectable ranged from 20% to 33%, 0% to 14%, and 0% to 5%, respectively. Confident breach detection increased with defect size and was most challenging in the lateral lamella and cribriform. CBCT permitted confident detection of ASBD as small as about 2 mm in the fovea ethmoidalis and planum. Oblique views were found to be superior to orthogonal planes.

Conclusions: the ability to identify ASBD depended on the size and location of defect. Oblique viewing planes were optimal for ASBD visualization
1043-3074
504-512
Bachar, Gideon
1bea813f-4e38-45c4-85a0-25561f47d4b3
Barker, Emma
d85e0e8f-7295-4912-9052-646a790d99db
Chan, Harley
85444e7c-c70b-48a2-b289-f733cf79c162
Daly, Michael J.
14a498e2-dda7-4c28-88ed-3cb9dbac9936
Nithiananthan, Sajendra
13452561-4932-4857-9c37-df8de3b8f69a
Vescan, Al
a2fc8d55-b9a0-4259-8b23-877a5c3cdc97
Irish, Jonathan C.
7350af02-856b-41fe-a3ba-aff389fd63dd
Siewerdsen, Jeffrey H.
bb611b53-aa88-4af9-92e8-813fe6c2221e
Bachar, Gideon
1bea813f-4e38-45c4-85a0-25561f47d4b3
Barker, Emma
d85e0e8f-7295-4912-9052-646a790d99db
Chan, Harley
85444e7c-c70b-48a2-b289-f733cf79c162
Daly, Michael J.
14a498e2-dda7-4c28-88ed-3cb9dbac9936
Nithiananthan, Sajendra
13452561-4932-4857-9c37-df8de3b8f69a
Vescan, Al
a2fc8d55-b9a0-4259-8b23-877a5c3cdc97
Irish, Jonathan C.
7350af02-856b-41fe-a3ba-aff389fd63dd
Siewerdsen, Jeffrey H.
bb611b53-aa88-4af9-92e8-813fe6c2221e

Bachar, Gideon, Barker, Emma, Chan, Harley, Daly, Michael J., Nithiananthan, Sajendra, Vescan, Al, Irish, Jonathan C. and Siewerdsen, Jeffrey H. (2010) Visualization of anterior skull base defects with intraoperative cone-beam CT. Head & Neck, 32 (4), 504-512. (doi:10.1002/hed.21219). (PMID:19693942)

Record type: Article

Abstract

Background: the role of cone-beam CT (CBCT) in demonstrating anterior skull base defects (ASBDs), differing in size and location, was investigated. The study was designed to describe the potential advantage of CBCT in the setting of an intraoperative cerebrospinal fluid (CSF) leak.

Methods: in all, 120 ASBD were evaluated in 5 cadaver heads. Orthogonal and oblique slices were reconstructed. Observer studies assessed the visibility of ASBD in each location as a function of defect size.

Results: for 1-, 2-, and 4-mm defects, the percentage that were undetectable ranged from 20% to 33%, 0% to 14%, and 0% to 5%, respectively. Confident breach detection increased with defect size and was most challenging in the lateral lamella and cribriform. CBCT permitted confident detection of ASBD as small as about 2 mm in the fovea ethmoidalis and planum. Oblique views were found to be superior to orthogonal planes.

Conclusions: the ability to identify ASBD depended on the size and location of defect. Oblique viewing planes were optimal for ASBD visualization

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Published date: April 2010

Identifiers

Local EPrints ID: 180057
URI: https://eprints.soton.ac.uk/id/eprint/180057
ISSN: 1043-3074
PURE UUID: 816d7d74-dee0-4988-ba63-88189f1cc5fb

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Date deposited: 06 Apr 2011 13:22
Last modified: 16 Jul 2019 23:43

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Contributors

Author: Gideon Bachar
Author: Emma Barker
Author: Harley Chan
Author: Michael J. Daly
Author: Sajendra Nithiananthan
Author: Al Vescan
Author: Jonathan C. Irish
Author: Jeffrey H. Siewerdsen

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