Stellenwert einer parameteroptimierten 3D-FISP-MR-angiographie bei kindern mit aortenisthmusstenose im vergleich zur katheterangiographie

Translated title of the contribution: Clinical implication of parameteroptimized 3D-FISP MR angiography (MRA) in children with aortic coarctation: Comparison with catheter angiography

Ulrich Kramer, G. Greil, F. Dammann, F. Schick, S. Miller, M. Fenchel, L. Sieverding, C. D. Claussen

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

Purpose: To implement parameter-optimized 3D-FISP MR angiography (MRA) with interleaved double-slab excitation and to compare the result with catheter angiography in children with aortic coarctation. Materials and Methods: Eighteen children aged 2-15 years (mean 9.1 years) underwent MR imaging on a 1.5T body scanner (Magnetom Vision, Siemens, Germany). All patients had undergone correlative catheter angiography. T1-weighted turbo spin echo (TSE) images (TR 600 ms, TE 17 ms, flip 160°, slice thickness 2-4 mm) were obtained in axial and parasagittal orientation, followed by an optimized 3D-FISP MR angiography in a sagittal plane (TR 12.5 ms, TE 5.5 ms, flip 22°, matrix 256 x 256, slice thickness 1.25 mm). All children were sedated but on spontaneous breathing. Image quality was graded by two experienced reviewers using a 4-point scoring system. Source images and reformatted maximum intensity projections (MIP) were analyzed for blood-tissue contrast as well as size and focal stenoses of the aortic arch. Results: Aortic coarctation was found in 13 of 18 patients, using the 3D-FISP MRA. A high correlation value (r = 0.96) was found compared to catheter angiography. Image quality was high in 94% with well defined blood-tissue contrast in all cases. The sensitivity to flow and breathing motion was low. Examination time was about 15 minutes depending on volume of interest and heart rate. Diagnostic accuracy has shown improvement using a combined analysis of source and MIP images. The mentioned technique has provided an excellent display of thoracic vasculature. Conclusion: MR imaging represents an excellent tool for non-invasive examination of the cardiovascular system of children. The 3D-MRA allows the recording of a large 3D data set without the use of contrast agent and within an adequate measurement period, particularly in small infants unable to hold their breath. In addition, hemodynamic significance of aortic coarctation, the existence of collateral vessels and other congenital heart diseases can be described reliably by using this technique.

Original languageGerman
Pages (from-to)1458-1465
Number of pages8
JournalRoFo Fortschritte auf dem Gebiet der Rontgenstrahlen und der Bildgebenden Verfahren
Volume176
Issue number10
DOIs
Publication statusPublished - Oct 1 2004

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Keywords

  • Coarctation of the aorta
  • Congenital heart disease
  • Magnetic resonance angiography (MRA)

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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