Type | Ref. | Technique (applied methods) |
---|---|---|
Scaling | [36] | Image resize |
Image registration ( AR\(^2\), DARTEL\(^1\), LRg) | ||
Intensity non-uniformity correction (GW\(^1\), B1-NU\(^1\), N3\(^1\)) | ||
[42] | Distortion correction (PB\(^1\)) | |
Bias correction/regularization (MICO\(^1\)) | ||
[46] | Contrast enhancement (CLAHE\(^1\)) | |
Correction | Slice timing correction (HSI\(^2\), FEAT\(^2\), LSA\(^2\), 6-PST\(^2\)) | |
Motion correction (FSL-MCFLIRT\(^2\), LSA\(^2\), 6-PST\(^2\)) | ||
Stripping and trimming | Skull stripping (NRBAC\(^1\)) | |
[47] | Brain extraction (FSL-BET\(^1\) \(^2\)) | |
[36] | Trim edges | |
Normalization | Normalization (SPM \(^{1,2}\), SD\(^1\), ANTs\(^1\), EPI\(^2\)) | |
Intensity normalization | ||
Spatial normalization (ALT\(^1\) \(^2\), FSL-FLIRT\(^2\), DARTEL\(^2\)) | ||
[32] | Z-score normalization | |
[39] | Numerical normalization | |
Filtering | Basic filtering (GSF\(^1\)) | |
[34] | Spatial filtering | |
Temporal filtering | ||
[8] | Weiner filtering | |
High-pass filtering | ||
Smoothing | Basic smoothing (FWHM-GK\(^2\)) | |
Spatial smoothing (FWHM-GK\(^2\)) | ||
Distinct techniques | [32] | Linear regression |
[49] | Linear detrend | |
Modulation (JWF\(^1\)) | ||
Segmentation (LLL\(^1\)) | ||
[60] | Voxel-based morphometric | |
[36] | Cortical reconstruction | |
Denoising (tCompCor\(^2\)) | ||
Data augmentation |