Fig. 2:

Outline of b-SToRM. The free breathing and ungated data is acquired using a navigated golden angle acquisition scheme. We estimate the Laplacian matrix from navigator data using the kernel low-rank model. The entries of the Laplacian matrix specify the connectivity of the points on the manifold, with larger weights between similar frames in the dataset. The manifold is illustrated by the sphere, while the connectivity of the points are denoted by lines whose thickness is indicative of proximity on the manifold. Note that neighbouring frames on the manifold may be well separated in acquisition time. The bandlimited manifold recovery scheme uses the Laplacian matrix to recover the images from the acquired k-space measurements. The Laplacian matrix also facilitates the easy visualization of the data.