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01.08.2005 | Cardiac

3D motion adapted gating (3D MAG): a new navigator technique for accelerated acquisition of free breathing navigator gated 3D coronary MR-angiography

verfasst von: M. Hackenbroch, K. Nehrke, J. Gieseke, C. Meyer, K. Tiemann, H. Litt, O. Dewald, C. P. Naehle, H. Schild, T. Sommer

Erschienen in: European Radiology | Ausgabe 8/2005

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Abstract

This study aimed to evaluate the influence of a new navigator technique (3D MAG) on navigator efficiency, total acquisition time, image quality and diagnostic accuracy. Fifty-six patients with suspected coronary artery disease underwent free breathing navigator gated coronary MRA (Intera, Philips Medical Systems, 1.5 T, spatial resolution 0.9×0.9×3 mm³) with and without 3D MAG. Evaluation of both sequences included: 1) navigator scan efficiency, 2) total acquisition time, 3) assessment of image quality and 4) detection of stenoses >50%. Average navigator efficiencies of the LCA and RCA were 43±12% and 42±12% with and 36±16% and 35±16% without 3D MAG (P<0.01). Scan time was reduced from 12 min 7 s without to 8 min 55 s with 3D MAG for the LCA and from 12 min 19 s to 9 min 7 s with 3D MAG for the RCA (P<0.01). The average scores of image quality of the coronary MRAs with and without 3D MAG were 3.5±0.79 and 3.46±0.84 (P>0.05). There was no significant difference in the sensitivity and specificity in the detection of coronary artery stenoses between coronary MRAs with and without 3D MAG (P>0.05). 3D MAG provides accelerated acquisition of navigator gated coronary MRA by about 19% while maintaining image quality and diagnostic accuracy.

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Titel: 3D motion adapted gating (3D MAG): a new navigator technique for accelerated acquisition of free breathing navigator gated 3D coronary MR-angiography
verfasst von: M. Hackenbroch
K. Nehrke
J. Gieseke
C. Meyer
K. Tiemann
H. Litt
O. Dewald
C. P. Naehle
H. Schild
T. Sommer
Publikationsdatum: 01.08.2005
Verlag: Springer-Verlag
Erschienen in: European Radiology / Ausgabe 8/2005
Print ISSN: 0938-7994
Elektronische ISSN: 1432-1084
DOI: https://doi.org/10.1007/s00330-005-2731-z

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3D motion adapted gating (3D MAG): a new navigator technique for accelerated acquisition of free breathing navigator gated 3D coronary MR-angiography

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