Flame instabilities and the formation of cellular structures during spherical gaseous explosions have been studied experimentally using natural light and schlieren high-speed cine photography, as well as single-shot planar laser-induced fluorescence (PLIF) from the OH radical.
Simultaneous two-species imaging using single-shot planar laser-induced fluorescence have been performed to record high quality image pairs of CH/OH, CH/CH2O and OH/CH2O to visualize the flame front structures in swirl-stabilized lean premixed methane/air flames.
The duty cycle for the most extreme cases of single shot echo planar imaging (EPI) is limited by the thermal response and expressions for maximum rates of image collection are given for burst and continuous modes of operation.
Functional scans were performed using a single shot echo planar imaging sequence (EPI).
A single shot echo planar imaging sequence (TR = 6100 ms, TE = 93 ms) was employed.
Single shot echo planar imaging (SS-EPI) sequences offer significantly faster acquisition times, thus overcoming DWI sensitivity to patient movement while still offering a relatively high SNR.
Whole cerebrum activity was measured using a Philips Intera 3 T Quaser, eight-channel head coil, 32 axial gradient-echo slices, 3 mm thickness, no gap, single shot echo planar imaging, echo time: 30 ms, repetition time: 1.5 s.
Data were gathered using a single shot echo planar imaging (EPI) sequence for data acquisition, with a TR of 3 seconds, a TE of 35 ms and a 90 degree flip angle.
The parameters of PWI were TR/TE = 2,500/15 ms with a post-labeling delay of 1,500 ms before the PWI signal was mapped using single shot echo planar imaging (EPI).
A single shot echo planar imaging with a twice-refocused spin echo pulse sequence, optimized to minimize eddy current-induced image distortions (Reese, Heid, Weisskoff, & Wedeen, 2003) was performed on all subjects with the following parameters: TR/TE = 6600/95 ms, voxel size 2 × 2 × 2 mm, FOV = 240 mm, slices = 50, b = 1000 s/mm, diffusion directions = 64.
Finally, a blood oxygen level dependent (BOLD) sensitive gradient echo, single shot echo planar imaging (GRE-EPI) sequence was used for fMRI data acquisition with the following parameters: TR = 6,000 ms, TE = 40 ms, FA = 90°, FOV = 220 × 220 mm, matrix = 64 × 64, ST = 5 mm, slice gap = 1 mm.
