Accelerating total variation regularization for matrix-valued images on GPUs

The advent of new matrix-valued magnetic resonance imaging modalities such as Diffusion Tensor Imaging (DTI) requires extensive computational acceleration. Computational acceleration on graphics processing units (GPUs) can make the regularization (denoising) of DTI images attractive in clinical settings, hence improving the quality of DTI images in a broad range of applications. Construction of DTI images consists of direction-specific Magnetic Resonance (MR) measurements. Compared with conventional MR, direction-sensitive acquisition has a lower signal-to-noise ratio (SNR). Therefore, high noise levels often limit DTI imaging. Advanced post-processing of imaging data can improve the quality of estimated tensors. However, the post-processing problem is only made more computationally difficult when considering matrix-valued imaging data. This paper describes the acceleration of a Total Variation regularization method for matrix-valued images, in particular, for DTI images on NVIDIA Q...

• Type: Conference
• Year: 2009
• Where: CF
• Authors: Maryam Moazeni, Alex A. T. Bui, Majid Sarrafzadeh
• Keywords: Applied Computing, CF 2009, Computational Acceleration, DTI Images, Magnetic Resonance