Webbläsaren som du använder stöds inte av denna webbplats. Alla versioner av Internet Explorer stöds inte längre, av oss eller Microsoft (läs mer här: * https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Var god och använd en modern webbläsare för att ta del av denna webbplats, som t.ex. nyaste versioner av Edge, Chrome, Firefox eller Safari osv.

Default user image.

Freddy Ståhlberg

Expert

Default user image.

Collateral flow in coarctation of the aorta with magnetic resonance velocity mapping: correlation to morphological imaging of collateral vessels.

Författare

  • Catarina Holmqvist
  • Freddy Ståhlberg
  • Katarina Hanséus
  • Peter Hochbergs
  • Staffan Sandström
  • Elna-Marie Larsson
  • Sven Laurin

Summary, in English

PURPOSE: To correlate quantification of collateral flow in aortic coarctation with the morphological visualization of the collateral vessels and to compare different approaches to measurement of collateral flow. MATERIALS AND METHODS: Thirteen children with coarctation were examined with T1-weighted spin-echo (T1-W SE) imaging and 3D contrast-enhanced magnetic resonance angiography (MRA). MR velocity mapping was performed at four levels in the descending aorta. RESULTS: The flow immediately above and below the coarctation did not differ significantly. Measuring within the coarctation resulted in flow overestimation. The increase of flow from proximal to distal aorta was 12 +/- 21% in patients with no or uncertain collaterals and 69 +/- 55% in patients with pronounced collaterals. Spin-echo images and MRA were comparable in visualizing collateral vessels. The visual estimation of collaterals correlated reasonably well with flow quantification MR velocity mapping. CONCLUSION: Collateral flow assessment with MR velocity mapping is an accurate technique for evaluating the hemodynamic importance of a coarctation and is recommended if abundant collaterals are not visualized with spin echo or MRA.

Avdelning/ar

  • Diagnostisk radiologi, Lund
  • Sektion V

Publiceringsår

2002

Språk

Engelska

Sidor

39-46

Publikation/Tidskrift/Serie

Journal of Magnetic Resonance Imaging

Volym

15

Issue

1

Dokumenttyp

Artikel i tidskrift

Förlag

John Wiley & Sons Inc.

Ämne

  • Radiology, Nuclear Medicine and Medical Imaging

Nyckelord

  • Infant
  • Three-Dimensional
  • Imaging
  • Computer-Assisted
  • Image Processing
  • Human
  • Female
  • Contrast Media
  • Collateral Circulation/*physiology
  • Preschool
  • Child
  • Blood Flow Velocity
  • Nonparametric
  • Aortic Coarctation/*physiopathology
  • Newborn
  • Linear Models
  • Magnetic Resonance Angiography/*methods
  • Male
  • Statistics

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1522-2586