Parameter selection in limited data cone-beam CT reconstruction using edge-preserving total variation algorithms

Phys Med Biol. 2017 Nov 21;62(24):9295-9321. doi: 10.1088/1361-6560/aa93d3.

Abstract

There are a number of powerful total variation (TV) regularization methods that have great promise in limited data cone-beam CT reconstruction with an enhancement of image quality. These promising TV methods require careful selection of the image reconstruction parameters, for which there are no well-established criteria. This paper presents a comprehensive evaluation of parameter selection in a number of major TV-based reconstruction algorithms. An appropriate way of selecting the values for each individual parameter has been suggested. Finally, a new adaptive-weighted projection-controlled steepest descent (AwPCSD) algorithm is presented, which implements the edge-preserving function for CBCT reconstruction with limited data. The proposed algorithm shows significant robustness compared to three other existing algorithms: ASD-POCS, AwASD-POCS and PCSD. The proposed AwPCSD algorithm is able to preserve the edges of the reconstructed images better with fewer sensitive parameters to tune.

MeSH terms

  • Algorithms*
  • Cone-Beam Computed Tomography*
  • Image Processing, Computer-Assisted / methods*
  • Phantoms, Imaging
  • Signal-To-Noise Ratio