Navigator-gated and real-time motion corrected free-breathing MR Imaging of myocardial late enhancement.
OBJECTIVE
A new magnetic resonance imaging approach for detection of myocardial late enhancement during free-breathing was developed.


RESULTS
For suppression of respiratory motion artifacts, a prospective navigator technology including real-time motion correction and a local navigator restore was implemented. Subject specific inversion times were defined from images with incrementally increased inversion times acquired during a single dynamic scout navigator-gated and real-time motion corrected free-breathing scan. Subsequently, MR-imaging of myocardial late enhancement was performed with navigator-gated and real-time motion corrected adjacent short axis and long axis (two, three and four chamber) views. This alternative approach was investigated in 7 patients with history of myocardial infarction 12 min after i. v. administration of 0.2 mmol/kg body weight gadolinium-DTPA.


CONCLUSIONS
With the presented navigator-gated and real-time motion corrected sequence for MR-imaging of myocardial late enhancement data can be completely acquired during free-breathing. Time constraints of a breath-hold technique are abolished and optimized patient specific inversion time is ensured.
Spuentrup
E
E
Department of Diagnostic Radiology, Aachen University of Technology, Germany. spuenti@rad.rwth-aachen.de
Buecker
A
A
Karassimos
E
E
Günther
R W
RW
Stuber
M
M
D000328:Adult; D000368:Aged; D003287:Contrast Media; D006321:Heart / Q000033:anatomy & histology*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000175:diagnosis*; D009206:Myocardium / Q000378:metabolism*
D003287:Contrast Media