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

• Published in: European radiology 2005-08, Vol.15 (8), p.1598-1606
• Main Authors: Hackenbroch, M, Nehrke, K, Gieseke, J, Meyer, C, Tiemann, K, Litt, H, Dewald, O, Naehle, C P, Schild, H, Sommer, T
• Format: Article
• Language: English
• Subjects: Aged; Angiography; Cardiovascular disease; Coronary Angiography - methods; Coronary artery disease; Coronary Artery Disease - diagnosis; Coronary vessels; Diagnostic systems; Female; Heart diseases; Humans; Image acquisition; Image Processing, Computer-Assisted; Image quality; Imaging, Three-Dimensional; Magnetic Resonance Angiography - methods; Male; Medical imaging; Prospective Studies; Sensitivity and Specificity; Spatial discrimination; Spatial resolution; Three dimensional motion; Time Factors
• ISSN: 0938-7994; 1432-1084
• DOI: 10.1007/s00330-005-2731-z

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 0.9x0.9x3 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 (P0.05). 3D MAG provides accelerated acquisition of navigator gated coronary MRA by about 19% while maintaining image quality and diagnostic accuracy.