Ray tracing reconstruction investigation for C-arm tomosynthesis
2016
C-arm tomosynthesis is a three dimensional imaging technique. Both x-ray source and the detector are mounted on a C-arm wheeled structure to provide wide variety of movement around the object. In this paper, C-arm tomosynthesis was introduced to provide three dimensional information over a limited view angle (less than 180o) to reduce radiation exposure and examination time. Reconstruction algorithms based on ray tracing method such as ray tracing back projection (BP), simultaneous algebraic reconstruction technique (SART) and maximum likelihood expectation maximization (MLEM) were developed for C-arm tomosynthesis. C-arm tomosynthesis projection images of simulated spherical object were simulated with a virtual geometric configuration with a total view angle of 40 degrees. This study demonstrated the sharpness of in-plane reconstructed structure and effectiveness of removing out-of-plane blur for each reconstruction algorithms. Results showed the ability of ray tracing based reconstruction algorithms to provide three dimensional information with limited angle C-arm tomosynthesis.
Keywords:
- Computer vision
- Tomosynthesis
- Expectation–maximization algorithm
- Detector
- Simultaneous Algebraic Reconstruction Technique
- Radiation
- Artificial intelligence
- Ray tracing (graphics)
- Maximum likelihood
- Optics
- Physics
- Radiation exposure
- maximum likelihood expectation maximization
- limited angle
- back projection
- view angle
- Correction
- Source
- Cite
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