Intracranial aneurysms and vascular malformations: Comparison of time-of- flight and phase-contrast MR angiography

John III Huston, D. A. Rufenacht, Richard Lorne Ehman, D. O. Wiebers

Research output: Contribution to journalArticle

131 Citations (Scopus)

Abstract

Twenty-seven patients with 14 aneurysms and 17 vascular malformations were each examined with both time-of-flight (TF) and phase-contrast (PC) magnetic resonance angiography of the head. Three-dimensional (3D) PC imaging depicted the patent lumen of the aneurysms, while 3D TF imaging depicted the patent lumen and a subacute thrombus if present. The 3D PC techniques were superior to 3D TF methods in depicting aneurysms larger than 15 mm. PC angiography allowed velocity resolution of vascular lesions and yielded functional flow information by directly depicting collateral flow to vascular lesions. Artifacts present on TF images were due to substances with short T1, hemosiderin, and surgical clips. Artifacts present on PC images were due to flow-related aliasing. The results showed that PC techniques have specific advantages over TF techniques, including identification of large aneurysms, velocity resolution of vascular lesions, depiction of flow direction about the circle of Willis, and less degradation by artifacts.

Original languageEnglish (US)
Pages (from-to)721-730
Number of pages10
JournalRadiology
Volume181
Issue number3
StatePublished - 1991

Fingerprint

Vascular Malformations
Intracranial Aneurysm
Aneurysm
Angiography
Artifacts
Blood Vessels
Circle of Willis
Hemosiderin
Magnetic Resonance Angiography
Surgical Instruments
Thrombosis
Head

Keywords

  • Aneurysm, cerebral
  • Arteriovenous malformations, cerebral
  • Cerebral blood vessels, MR studies
  • Magnetic resonance (MR), comparative studies
  • Magnetic resonance (MR), technology

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology

Cite this

Intracranial aneurysms and vascular malformations : Comparison of time-of- flight and phase-contrast MR angiography. / Huston, John III; Rufenacht, D. A.; Ehman, Richard Lorne; Wiebers, D. O.

In: Radiology, Vol. 181, No. 3, 1991, p. 721-730.

Research output: Contribution to journalArticle

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