Tohoku University Cognitive Neuroscience Application Center

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Protocol records

Return to Summary > Imaging Manual 

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Recording Protocols
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Protocols will be displayed.

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Summary Tab
❶voxel size（mm）：the smallest unit of imaging
❷Echo Time【TE】(ms)：the time from pulse irradiation until the magnetization of the hydrogen nucleus is excited to generate an echo signal
➌Repetition Time【TR】(ms)：Interval of pulse irradiation, repetition time associated with whole brain imaging
❹Field of View【FOV】(mm)：Size of the slice
➎Matrix size: Resolution of the image. It is usually expressed as the number of columns (e.g., 64 × 64), and the higher the number, the higher the spatial resolution.
❻Number of slices (slices): number of images comprising the whole brain

Contrast Tab
❼flip angle（℃）：Rotation angle for excitation of hydrogen nuclei

Geometry Tab
➑Slice Thickness（mm）：the thickness of the section for each scan. The smaller the thickness, the higher the modological detail.
➒Slice spacing (mm): the distance between adjacent sections; if 0 mm, the sections are contiguous and missing data and overlapping images are avoided.

➓Slice orientation: the direction of the intercept during the scan. It determines from which angle the image is acquired, such as transverse, coronal, or sagittal.
⓫Phase encoding direction/fold direction: refers to the direction in which the phase of the image is encoded in an fMRI scan, such as anteroposterior (A/P), lateral (R/L), or head to foot (H/F). It affects the artifacts (false images) that appear in the image.

⓬Slice order: order of imaging (ascending: from foot direction / descending: from parietal direction / or specified by slice number)
FH = Foot-Head = from foot direction = ascending

Dry/Ang Tab
⓭Volume [dyn scans] (sheets): number of sets of 3D images acquired during the fMRI experiment (whole brain acquired)

*Enter according to the length of the experiment.
Example:
dyn scans=302 (whole brain acquired 302 times)
TR=2000 (2 seconds to acquire the whole brain)
In the case of, 
302 x 2 = 604 (seconds)
which corresponds to a session of about 10 minutes

If TR=2000 and the session is 5 minutes
Set dyn scans to about 152

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