Download PDF
J Neurol Surg B Skull Base 2017; 78(02): 197-200
DOI: 10.1055/s-0036-1594241
Original Article
Georg Thieme Verlag KG Stuttgart · New York

Computerized Assessment of Superior Semicircular Canal Dehiscence Size using Advanced Morphological Imaging Operators

Joel S. Beckett
1   Department of Neurosurgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, United States
,
Carlito Lagman
1   Department of Neurosurgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, United States
,
Lawrance K. Chung
1   Department of Neurosurgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, United States
,
Timothy T. Bui
1   Department of Neurosurgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, United States
,
Seung J. Lee
1   Department of Neurosurgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, United States
,
Brittany L. Voth
1   Department of Neurosurgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, United States
,
Bilwaj Gaonkar
1   Department of Neurosurgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, United States
,
Quinton Gopen
2   Department of Head and Neck Surgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, United States
,
Isaac Yang
1   Department of Neurosurgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, United States
2   Department of Head and Neck Surgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, United States
› Author Affiliations
Further Information

Publication History

19 September 2016

10 October 2016

Publication Date:
07 December 2016 (online)

Also available at
    Permissions and Reprints

Abstract

Superior semicircular canal dehiscence (SSCD) describes a pathological aperture at the level of the arcuate eminence. Techniques for quantifying defect size are described with most studies using two-dimensional lengths that underestimate the pathology. The objective of this study is to describe a novel method of measurement that combines manual segmentation of high-resolution computed tomography (HRCT) images of the temporal bone and a morphological skeletonization transform to calculate dehiscence volume. Images were imported into a freely available image segmentation tool: ITK-SNAP (version 3.4.0; available at: http://www.itksnap.org/) software. Coronal and sagittal planes were used to outline the dehiscence in all slices demonstrating the defect using the paintbrush tool. A morphological skeletonization transform derived a single-pixel thick representation of the original delineation. This “sheet” of voxels overlaid the dehiscence. Volume was calculated by counting the number of nonzero image voxels within this “sheet” and multiplying this number by the volume (mm3) of each voxel. A total of 70 cases of SSCD were identified. Overall, mean volume was 0.88 mm3 (standard deviation: 0.57, range: 0.11–2.27). We present a novel technique for measuring SSCD, which we believe provides a more accurate representation of the pathology, and has the potential to standardize measurement of SSCD.

Keywords

superior semicircular canal dehiscence - SSCD - size - volume - measurement
 

  • References

  • 1 Pfammatter A, Darrouzet V, Gärtner M , et al. A superior semicircular canal dehiscence syndrome multicenter study: is there an association between size and symptoms?. Otol Neurotol 2010; 31 (3) 447-454
    CrossrefPubMedGoogle Scholar
  • 2 Rajan GP, Leaper MR, Goggin L, Atlas MD, Boeddinghaus R, Eikelboom RK. The effects of superior semicircular canal dehiscence on the labyrinth: does size matter?. Otol Neurotol 2008; 29 (7) 972-975
    CrossrefPubMedGoogle Scholar
  • 3 Chung LK, Ung N, Spasic M , et al. Clinical outcomes of middle fossa craniotomy for superior semicircular canal dehiscence repair. J Neurosurg 2016; 1-7
    PubMedGoogle Scholar
  • 4 Spasic M, Trang A, Chung LK , et al. Clinical Characteristics of Posterior and Lateral Semicircular Canal Dehiscence. J Neurol Surg B Skull Base 2015; 76 (6) 421-425
    Article in Thieme ConnectPubMedGoogle Scholar
  • 5 Yew A, Zarinkhou G, Spasic M, Trang A, Gopen Q, Yang I. Characteristics and management of superior semicircular canal dehiscence. J Neurol Surg B Skull Base 2012; 73 (6) 365-370
    Article in Thieme ConnectPubMedGoogle Scholar
  • 6 Martin C, Chahine P, Veyret C, Richard C, Prades JM, Pouget JF. Prospective radiological study concerning a series of patients suffering from conductive or mixed hearing loss due to superior semicircular canal dehiscence. Eur Arch Otorhinolaryngol 2009; 266 (8) 1175-1181
    CrossrefPubMedGoogle Scholar
  • 7 Chien WW, Janky K, Minor LB, Carey JP. Superior canal dehiscence size: multivariate assessment of clinical impact. Otol Neurotol 2012; 33 (5) 810-815
    CrossrefPubMedGoogle Scholar
  • 8 Manzari L, Burgess AM, McGarvie LA, Curthoys IS. Ocular and cervical vestibular evoked myogenic potentials to 500 Hz fz bone-conducted vibration in superior semicircular canal dehiscence. Ear Hear 2012; 33 (4) 508-520
    CrossrefPubMedGoogle Scholar
  • 9 Yuen HW, Boeddinghaus R, Eikelboom RH, Atlas MD. The relationship between the air-bone gap and the size of superior semicircular canal dehiscence. Otolaryngol Head Neck Surg 2009; 141 (6) 689-694
    CrossrefPubMedGoogle Scholar
  • 10 Chi FL, Ren DD, Dai CF. Variety of audiologic manifestations in patients with superior semicircular canal dehiscence. Otol Neurotol 2010; 31 (1) 2-10
    CrossrefPubMedGoogle Scholar
  • 11 Pisano DV, Niesten ME, Merchant SN, Nakajima HH. The effect of superior semicircular canal dehiscence on intracochlear sound pressures. Audiol Neurootol 2012; 17 (5) 338-348
    CrossrefPubMedGoogle Scholar
  • 12 Cloutier JF, Bélair M, Saliba I. Superior semicircular canal dehiscence: positive predictive value of high-resolution CT scanning. Eur Arch Otorhinolaryngol 2008; 265 (12) 1455-1460
    CrossrefPubMedGoogle Scholar
  • 13 Belden CJ, Weg N, Minor LB, Zinreich SJ. CT evaluation of bone dehiscence of the superior semicircular canal as a cause of sound- and/or pressure-induced vertigo. Radiology 2003; 226 (2) 337-343
    CrossrefPubMedGoogle Scholar
  • 14 Sequeira SM, Whiting BR, Shimony JS, Vo KD, Hullar TE. Accuracy of computed tomography detection of superior canal dehiscence. Otol Neurotol 2011; 32 (9) 1500-1505
    CrossrefPubMedGoogle Scholar
  • 15 Curtin HD. Superior semicircular canal dehiscence syndrome and multi-detector row CT. Radiology 2003; 226 (2) 312-314
    CrossrefPubMedGoogle Scholar