Struct GradientTable 

pub struct GradientTable {
    pub bvals: Bvals,
    pub bvecs: Bvecs,
}

Combined b-value + b-vector gradient table for a DWI acquisition.

Provides convenience methods for counting volumes, identifying b=0 images, and iterating over gradient directions.

Fields

bvals: Bvals

B-values for each volume.

bvecs: Bvecs

Gradient directions for each volume (unit vectors for diffusion, zero for b=0).

Implementations

impl GradientTable

pub fn new(bvals: Bvals, bvecs: Bvecs) -> Result<Self>

Create a gradient table from b-values and b-vectors.

Errors

Returns an error if the lengths don’t match.

pub fn from_files(bval_path: &Path, bvec_path: &Path) -> Result<Self>

Load from companion .bval and .bvec files.

Errors

Returns an error if either file can’t be read/parsed or they have different volume counts.

pub fn n_volumes(&self) -> usize

Number of volumes.

pub fn n_diffusion_volumes(&self) -> usize

Number of diffusion-weighted volumes (b > 0).

pub fn n_b0_volumes(&self) -> usize

Number of b=0 volumes.

pub fn unique_bvals(&self) -> Vec<f64>

Unique b-values (sorted).

pub fn iter(&self) -> impl Iterator<Item = (f64, [f64; 3])> + '_

Iterate over (b-value, direction) pairs.

pub fn b0_indices(&self) -> Vec<usize>

Get indices of b=0 volumes.

pub fn is_normalized(&self) -> bool

Check if the gradient directions are approximately unit-normalized for non-zero b-values.

Trait Implementations

impl Clone for GradientTable

fn clone(&self) -> GradientTable

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for GradientTable

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for GradientTable

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.