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Carotid artery stenosis: contrast-enhanced MR angiography with two different scan times compared with digital subtraction angiography

In English

Författare

  • PC Sundgren
  • P Sunden
  • Arne Lindgren
  • Jan Lanke
  • Stig Holtås
  • Elna-Marie Larsson

Summary, in English

Contrast enhanced magnetic resonance angiography (CE MRA) is a non-invasive alternative to conventional digital subtraction angiography (DSA). CE MRA is increasingly used as a complement to Duplex in the preoperative assessment of carotid artery stenosis. The purpose of this study was to determine if CE MRA could replace preoperative DSA. CE MRA with a scan time of 10 or 28 s was performed in 24 consecutive patients who were scheduled for preoperative DSA because of Duplex-verified severe carotid artery stenosis. Two neuroradiologists measured the degree of stenosis with three different methods, and the image quality was evaluated. DSA was used as the gold standard. For detection of severe stenosis (N. American symptomatic carotid endarterectomy trial (NASCET) greater than or equal to70%; European symptomatic carotid endarterectomy trial (ECST) greater than or equal to80%; common carotid artery method (CCAM) greater than or equal to80%), the sensitivity of CE MRA maximum intensity projection (MIP) compared with DSA was 82%-100%, the specificity was 74%-93% and the accuracy was 77%-90%. The inter-observer agreement was higher, the image quality was better and the intracranial main arteries were better visualized with the 28 s than with the 10 s scan time. The enhancement of the jugular veins seen in 17% of the 10 s scans and in 58% of the patients with the 28 s scans did not interfere with the evaluation of the carotid arteries. CE MRA, preferably with a scan time of 28 s, can replace DSA in the preoperative assessment of most patients with carotid artery stenosis.

Publiceringsår

2002

Språk

Engelska

Sidor

592-599

Publikation/Tidskrift/Serie

Neuroradiology

Volym

44

Issue

7

Dokumenttyp

Artikel i tidskrift

Förlag

Springer

Ämne

  • Radiology, Nuclear Medicine and Medical Imaging
  • Neurology

Nyckelord

  • digital subtraction angiography
  • magnetic resonance angiography
  • magnetic resonance contrast enhancement
  • carotid arteries
  • stenosis

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1432-1920