Preliminary attempts to create such a "fossil record" of merging galaxies using Hubble pictures support the theory that ellipticals can form from colliding spirals, according to Bradley Whitmore, of STScI, who will publish a five-snapshot sequence in November in the Astronomical Journal.
In the coming months, I'll post here my answers to his questions, but for now here are seven five-snapshot sequences from my stay.
Figure 2 shows simulated signal intensities for the IR snapshot FLASH sequence, using equation (1) and the simplified equation (2) for the sequence described above.
This paper describes a snapshot DWI sequence, which utilizes a novel single-sided bipolar diffusion sensitizing gradient pulse within a spin echo sequence.
Fig. 10 Snapshot of sequence 3. Outdoor, 1601 frames, 53.4 s, 853 × 480, 16:9 Fig. 11 The comparison of results for sequence 2. Bundler, OpenMVG, and VisualSFM use partial frames.
Fig. 5 Snapshot of sequence 1.
A snapshot flash sequence was used, with TR = 27.9 ms, TE = 10 ms, flip angle = 7°, matrix size 128×32 (zero filled at 128×128).
These data give a snapshot of sequence evolution over a much shorter time period than the millions of years that separate sister species, providing the opportunity to capture bias inducing processes in action.
Dynamic contrast-enhanced MR imaging using an inversion recovery snapshot FLASH sequence with a relatively long TIeff of 815 ms and an interval of 3 s between subsequent images, performed in a coronal oblique plane provides a rapid, reasonably accurate measure of R1 for values between 1 and 5 s−1, and therefore of Gd-DTPA concentration during contrast enhancement.
Assuming minimal transverse relaxation between the excitation pulses and signal acquisition, the contrast obtained from an inversion recovery snapshot FLASH sequence is affected by TR, TI, α, the number of lines of k space (Nk) and the delay between the end of image acquisition and the next inversion pulse (TD).
The differences observed relied on the different ratios of nucleotides at the SNP locus as evidenced via SNaPshot mini-sequencing.
