Computed tomography of the pharynx in a closed vs. open mouth position

Michele P. Laurenson, Allison Zwingenberger, Derek Cissell, Lynelle R Johnson, Matie J. Mcpeters, Mathieu Spriet, Sandra L. Taylor, Rachel E Pollard

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The pharynx is anatomically complex and evaluation can be difficult even with cross-sectional imaging. Eight animals had computed tomography (CT) studies of the head performed with the mouth open and closed. The studies were anonymized and evaluated by four radiologists for visibility of six anatomic regions (dorsal wall of nasopharynx, lumen of nasopharynx, dorsal margin of the soft palate, ventral margin of the soft palate, oropharynx, and laryngopharynx) and for certainty of a normal or abnormal diagnosis of four different anatomic regions (nasopharynx, soft palate, oropharynx, and laryngopharynx). Mean visual scores differed significantly between mouth positions and were improved when the mouth was open. The ability of radiologists to classify anatomic regions as normal or abnormal vs. unsure also varied between mouth positions, and there was greater uncertainty when the mouth was closed. In addition, estimated volume of the air-filled nasopharynx differed significantly as a function of mouth position and was greater when the mouth was open (mean=1.187cm 3, SE=0.177) vs. closed (mean=0.584cm 3, SE=0.116). Computed tomographic evaluation of the pharynx can be improved with the mouth open.

Original languageEnglish (US)
Pages (from-to)357-361
Number of pages5
JournalVeterinary Radiology and Ultrasound
Volume52
Issue number4
DOIs
StatePublished - Jul 2011

Fingerprint

pharynx
Pharynx
computed tomography
Mouth
mouth
Tomography
nasopharynx
Nasopharynx
Soft Palate
palate
Hypopharynx
Oropharynx
Uncertainty
uncertainty
Air
Head
image analysis
air

Keywords

  • Cat
  • CT
  • Dog
  • Nasopharynx
  • Pharynx

ASJC Scopus subject areas

  • veterinary(all)

Cite this

Computed tomography of the pharynx in a closed vs. open mouth position. / Laurenson, Michele P.; Zwingenberger, Allison; Cissell, Derek; Johnson, Lynelle R; Mcpeters, Matie J.; Spriet, Mathieu; Taylor, Sandra L.; Pollard, Rachel E.

In: Veterinary Radiology and Ultrasound, Vol. 52, No. 4, 07.2011, p. 357-361.

Research output: Contribution to journalArticle

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