Extraocular Muscle Size Comparison Using Standardized A-scan Echography and Computerized Tomography Scan Measurements

Jean Edwards Holt, Patrick S. O'Connor, John P. Douglas, Barry Byrne

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

In many clinical situations, the standard for evaluating extraocular muscle (EOM) size, particularly in thyroid ophthalmopathy, has been use of the computerized tomography (CT) scanner. The impression is generally reported as “enlarged or normal EOMs.” If the report of “normal EOM” on CT scan weighs heavily against the diagnosis of thyroid eye disease, how does this qualitative assessment compare with the diagnostic modality of ultrasound? The technique of standardized A-scan measurement of extraocular muscles has been extremely accurate. In this paper, standardized A-scan measurements and CT scan estimates of EOMs are compared in a series of ten patients with a clinical diagnosis of Graves' disease. Three of ten patients displayed enlarged EOMs by CT interpretations; seven of ten patients were categorized as consistent with Graves' disease by correlation with current ultrasonographic criteria for muscle enlargement, asymmetry, and high irregularity of tissue reflectivity.

Original languageEnglish (US)
Pages (from-to)1351-1355
Number of pages5
JournalOphthalmology
Volume92
Issue number10
DOIs
StatePublished - Jan 1 1985

Keywords

  • computerized tomography scan
  • extraocular muscle enlargement
  • Graves' disease
  • standardized A-scan echography
  • ultrasound

ASJC Scopus subject areas

  • Ophthalmology

Fingerprint Dive into the research topics of 'Extraocular Muscle Size Comparison Using Standardized A-scan Echography and Computerized Tomography Scan Measurements'. Together they form a unique fingerprint.

  • Cite this