The phrase "acquire session" is not standard in written English and may cause confusion.
It could be used in a technical context, such as in programming or networking, where sessions are established or acquired.
Example: "To proceed with the authentication, you need to acquire session before accessing the secure area."
Alternatives: "establish session" or "initiate session".
However, the co-registration of structures in sequentially acquired sessions in different imaging modalities may be difficult because, e.g., the carotid artery changes its exact position with the head position and global registration algorithms usually are based on other structures.
For the frequency experiment a total 720 vol were acquired per session.
306 volumes were acquired per session (1224 scans in total per subject).
One hundred and three volumes were acquired per session, leading to a total of 412 volume images across the 4 sessions.
One hundred and eight volumes were acquired per session (repetition time (TR): 3.15 s; echo time (TE): 50 ms; flip angle = 90°).
High-resolution T1- and T2-weighted MR structural sequences were acquired in Session 1 for radiological assessment and image registration.
Anatomical volumes were acquired in each session using a T1 weighted MPRAGE sequence with 1 mm isotropic resolution.
In total, 2048 three-dimensional images of the brain were contiguously acquired in each session with a sampling interval of 1100 ms (37 mins 32 s overall).
As such, many vessels can be prepared in parallel and data acquired in one session, thereby providing a relatively high throughput method of imaging arterial lesions and not requiring prolonged use of the imaging device.
After discarding 12 initial scans to account for T1 magnetisation effects, each fMRI session acquired 2048 volumes in total: pre-task resting acquisition: 512 EPI volumes; working memory task: 512 EPI volumes; post-task rest acquisition: 1024 EPI volumes.
