M. Yigitsoy, C. Wachinger, N. Navab Manifold learning for image-based breathing gating in MRI SPIE Medical Imaging, Lake Buena Vista (Orlando), Florida, USA, February 2011 (bib)
	Study of organ motion due to respiration is an important issue for image-guided procedures in the abdominal region. We propose a novel image-based breathing gating method to recover the respiratory signal from the images. The gating is accomplished using Laplacian eigenmaps, a manifold learning technique, by determining the low-dimensional manifold embedded in the high-dimensional image space. We perform the manifold learning on MR slices acquired from a fixed location. Experiments are conducted on liver data by projecting the data on different dimensions. The results are evaluated in terms of suitability for usage as a similarity criterion for 4D reconstruction methods.
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