Virtual laryngoscopy—preliminary experience

Byrne, A.T.; Walshe, Peter; McShane, D.; Hamilton, S.

doi:10.1016/j.ejrad.2005.02.006

Cited by 21 publications

(10 citation statements)

References 7 publications

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“…[56] Studies have been conducted that have used sequential scans during different phonations. [7] Some of these studies have shown that coronal reconstruction of images acquired during ‘hee’ phonation could improve the detection rate of vocal cord palsy.…”

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confidence: 99%

Dynamic MRI of the vocal cords using phased-array coils: A feasibility study

Schlamann

Lehnerdt

Maderwald

et al. 2009

Indian J Radiol Imaging

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Objective:Endoscopy for evaluation of hoarseness is an invasive procedure and the result depends, to a large extent, on the patient's cooperation. Successful laryngoscopy can also be hampered by unfavourable anatomic conditions, a severely impaired general condition, or severe coagulopathy. We evaluated the feasibility of doing ultra-fast magnetic resonance imaging (MRI), using a recent dedicated coil design and a sequence with inherently high signal-to-noise ratios (SNR), for the detection of motility disorders of the vocal cords.Materials and Methods:Twelve consecutive patients (eight males and four females) in the age range of 24–80 years (mean age 60 years) with persistent hoarseness and presumed vocal cord palsy were included in this blinded prospective study. Two two-element phased-array carotid coils were used for signal reception. The first coronal real-time steady-state free precession (SSFP) sequence was performed during silence (i.e., with no vocal cord motion) and the second while phonating ‘heee.’ Qualitative MRI findings were compared with the results of the endoscopic examination.Results:The examination time for setup, patient instruction and positioning, localization scans, and real-time SSFP scans was less than 10 min. Seven patients with laryngoscopically-confirmed unilateral palsy of the vocal cord were correctly identified with MRI. The five remaining patients had hoarseness due to causes other than vocal cord palsy; they showed normal motion of the vocal cords on MRI and endoscopy.Conclusion:Compared to preceding studies, the image quality in this study is supported by excellent SNR (carotid phased-array coils and SSFP sequence with higher SNR if compared to a spoiled gradient-echo sequence or an EPI sequence). Further studies, with larger groups of patients, are necessary to show if this protocol can serve as an alternative to endoscopy in selected cases.

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mentioning

confidence: 99%

Dynamic MRI of the vocal cords using phased-array coils: A feasibility study

Schlamann

Lehnerdt

Maderwald

et al. 2009

Indian J Radiol Imaging

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“…Virtual endoscopy has been used to evaluate pathology at various sites along the airway, from nasopharynx to larynx to the tracheobronchial tree [28][29][30][31][32]. Here, we have demonstrated that glottic, subglottic, and multilevel lesions can all be accurately reproduced to provide us with a realistic image of the airway and aid us in airway management planning.…”

Section: Discussionmentioning

confidence: 88%

Virtual endoscopy—a new assessment tool in difficult airway management

Ahmad

Millhoff

John

et al. 2015

Journal of Clinical Anesthesia

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“…The added advantage of this technology is that any anesthesiologist who undertakes a short period of self-training can reconstruct a VE of the patient's airway as part of a comprehensive airway assessment. 18 Previous studies and case reports have shown the use of VE to aid in the airway assessment of patients with head and neck pathology, 19,20 but this novel study evaluates the influence of VE videos not only on diagnostic accuracy but also on airway management planning.…”

Section: Discussionmentioning

confidence: 99%