title: A ray tracing approach to restoration and resolution enhancement in experimental ultrasound tomography.
abstract: Recursive ray tracing is applied for experimental time-of-flight projection data to achieve a resolution enhancement over the initial straight-ray reconstructed velocity image. Curved-ray reconstruction is performed using the dedicated simultaneous algebraic reconstruction technique (SART). Tomographic reconstructions from experimental data are compared to images obtained from simulated projection data for a refractive field mimicking the actual tissue-equivalent phantom. The simulation study adequately explains the macrostructural geometric distortion and loss of resolution in the straight-ray image due to refraction effects that are unaccounted for.
authors: Department of Electrical Engineering, University of Kentucky, Lexington 40506.
authors: A H
authors: AH
authors: Andersen
mesh_terms: D003198:Computer Simulation; D005780:Gelatin; D007089:Image Enhancement; D007091:Image Processing, Computer-Assisted; D008961:Models, Structural; D008962:Models, Theoretical; D013499:Surface Properties; D014465:Ultrasonics; D014463:Ultrasonography / Q000706:statistics & numerical data
chemical_list: D005780:Gelatin