Correction method of surface effects in infrared laser transillumination CT imaging

Yoshiaki Sasaki; Hiroki Inage; Ryota Emori; Masaki Goto; Ryo Takahashi; Shinji Tanosaki; Tetsuya Yuasa; Hiroshi Taniguchi; Balasigamani Devaraj; Takao Akatsuka

doi:10.1117/12.534495

6 May 2004 Correction method of surface effects in infrared laser transillumination CT imaging

Yoshiaki Sasaki, Hiroki Inage, Ryota Emori, Masaki Goto, Ryo Takahashi, Shinji Tanosaki, Tetsuya Yuasa, Hiroshi Taniguchi, Balasigamani Devaraj, Takao Akatsuka

Author Affiliations +

Proceedings Volume 5368, Medical Imaging 2004: Physics of Medical Imaging; (2004) https://doi.org/10.1117/12.534495
Event: Medical Imaging 2004, 2004, San Diego, California, United States

Abstract

A reconstruction method for transillumination laser CT using optical heterodyne detection is proposed. Laser CT does not obey the Radon transform due to surface effects, which occur as results of refractive index mismatch and roughness of surface, and bring about annulus artifact and impair quantitative accuracy of a reconstructed image. Optical attenuation with surface effects is described using a model function with respect to an incident angle. This reconstruction produces a least squares problem incorporating the surface effect, which is solved via the conjugate gradient method. The method is applied to data from a acrylic physical phantom containing Intralipid-10% solution in various concentrations for demonstrating the effectiveness of the proposed method in terms of morphological and quantitative information. The CDI method is proved to have an excellent quantitative accuracy.

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Yoshiaki Sasaki, Hiroki Inage, Ryota Emori, Masaki Goto, Ryo Takahashi, Shinji Tanosaki, Tetsuya Yuasa, Hiroshi Taniguchi, Balasigamani Devaraj, and Takao Akatsuka "Correction method of surface effects in infrared laser transillumination CT imaging", Proc. SPIE 5368, Medical Imaging 2004: Physics of Medical Imaging, (6 May 2004); https://doi.org/10.1117/12.534495

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