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extract_csf

qsm_core::inversion::medi

Function extract_csf 

Source 
pub fn extract_csf(
    r2s: &[f64],
    mask: &[u8],
    grid: &Grid,
    r2s_threshold: f64,
    erode: bool,
) -> Vec<u8> ⓘ
Expand description

extract_CSF.m (MEDI toolbox 2024.11.26): the ventricular CSF mask for MEDI+0.

Low-R2* voxels (r2s < r2s_threshold) form 6-connected regions twice: inside a 30 mm sphere at the mask’s centroid, and inside the mask (eroded first, when erode, to where the 10 mm SMV.m of the mask exceeds 0.999). The CSF mask is every region of the second kind that touches one of the three largest regions of the first kind. extract_CSF.m errors when there are fewer than three central regions; this uses those there are.

§Arguments

  • r2s - R2* in Hz (arlo.m, arlo)
  • mask - Brain mask, 1 = brain
  • grid - Volume grid (dimensions and voxel sizes in mm)
  • r2s_threshold - thresh_R2s (default 5 Hz)
  • erode - flag_erode (default on)

§Returns

The CSF mask, 1 = CSF