CMR ACQUISITION Sample Clauses

CMR ACQUISITION. Data were acquired with a 1.5T scanner (Intera, Philips, Best, The Netherlands) using 32- channel coils. Examinations included high-resolution perfusion, cine and scar imaging. Perfusion imaging consisted of 3 short axis slices acquired every heartbeat covering 16 of the standard myocardial segments (apex excluded)(11) first during adenosine stress (140μg/kg/minute of adenosine administered intravenously for 4 minutes) followed by a short axis cine imaging stack and then rest imaging. Imaging parameters for perfusion imaging: k-t blast acceleration factor 5, SSFP sequence, shortest TE (range 1.35-1.54ms), shortest TR (range 2.64-3.12ms), 50° flip angle; 90° prepulse, 100ms prepulse delay and typical acquired resolution 1.7 x 1.9 x 10mm. A dual bolus(127) (equal volumes of 0.0075mmol/kg followed by 0.075mmol/kg after a 20 second pause) of weight adjusted contrast agent (Gadobutrol/Gadovist, Bayer Healthcare, Germany) was injected at 4ml/s by a power injector for stress and rest imaging. The cine images were completed with a set of long axis views. Late Gadolinium enhancement (LGE) images were acquired after 10 minutes (Gadovist 0.2mmol/kg cumulative dose) using an inversion recovery sequence.