TABLE 1. Scan parameters for the proposed and conventional first-pass perfusion imaging methods.

Both methods employed an ECG-gated FLASH pulse sequence with saturation-recovery magnetization preparation for data acquisition during a 50-heartbeat free-breathing scan.

	Proposed Method	Conventional Method
prescribed resolution (readout × PE)	1.7 mm × 1.7 mm	2.2 mm × 2.7 mm
reconstructed resolution	2.2 mm × 2.7 mm
parallel-imaging rate (TGRAPPA)	R = 4	R = 2
number of acquired phase-encode lines	44	56
temporal footprint (acquisition time) for each slice	125 ms	133 ms
TR (echo spacing)	2.8 ms	2.4 ms
k-space matrix size	224×176	176×112
FOV (readout × PE)	380 mm × 305 mm
TI (for SR pulse)	120 ms
flip angle	12°
receiver bandwidth per pixel	770 Hz/pixel
slice positions	3 contiguous short-axis slices acquired in each heart beat (8 mm thickness)