Absent middle cerebral artery signal in transcranial color-coded sonography: A reliable indicator of occlusion?

Yi Chun Chen, Sien Tsong Chen, Chi Jen Chen, Tsong Hai Lee

Research output: Contribution to journalArticle

8 Citations (Scopus)


Background: Assess the accuracy of transcranial color-coded sonography (TCCS) for detecting middle cerebral artery (MCA) stem occlusion and compare it with cerebral angiography. Methods: This study enrolled a series of patients who received TCCS and cerebral angiography at the Department of Neurology in Chang Gung Memorial Hospital, Linkou Medical Center, Taoyuan, Taiwan, between January 1997 and July 2003. MCA stem occlusion was diagnosed based on digital subtraction angiography and/or computed tomographic angiography. The effect of the supplying artery on the insonation of MCA stem was considered. The sonographic criteria for MCA stem occlusion were defined as absent MCA stem signal + visible signal on the reference arteries, including ipsilateral posterior cerebral artery, ipsilateral anterior cerebral artery or contralateral MCA stem. Results: A total of 419 consecutive patients were enrolled. Factors that significantly influenced MCA stem insonation included ≥50% ipsilateral carotid artery stenosis, ≥50% MCA stem stenosis, female gender, and age ≥60 years. Comparing patients with

Original languageEnglish
Pages (from-to)251-257
Number of pages7
JournalCerebrovascular Diseases
Issue number4
Publication statusPublished - Sep 2005
Externally publishedYes



  • Cerebral angiography
  • Middle cerebral artery
  • Occlusion
  • Transcranial color-coded sonography
  • Transcranial Doppler
  • Ultrasonography

ASJC Scopus subject areas

  • Clinical Neurology

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