Infrared laser transillumination CT imaging system using parallel fiber arrays and optical switches for finger joint imaging

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

doi:10.1117/12.534489

6 May 2004 Infrared laser transillumination CT imaging system using parallel fiber arrays and optical switches for finger joint imaging

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

Author Affiliations +

Proceedings Volume 5368, Medical Imaging 2004: Physics of Medical Imaging; (2004) https://doi.org/10.1117/12.534489
Event: Medical Imaging 2004, 2004, San Diego, California, United States

Abstract

The heterodyne detection technique, on which the coherent detection imaging (CDI) method founds, can discriminate and select very weak, highly directional forward scattered, and coherence retaining photons that emerge from scattering media in spite of their complex and highly scattering nature. That property enables us to reconstruct tomographic images using the same reconstruction technique as that of X-Ray CT, i.e., the filtered backprojection method. Our group had so far developed a transillumination laser CT imaging method based on the CDI method in the visible and near-infrared regions and reconstruction from projections, and reported a variety of tomographic images both in vitro and in vivo of biological objects to demonstrate the effectiveness to biomedical use. Since the previous system was not optimized, it took several hours to obtain a single image. For a practical use, we developed a prototype CDI-based imaging system using parallel fiber array and optical switches to reduce the measurement time significantly. Here, we describe a prototype transillumination laser CT imaging system using fiber-optic based on optical heterodyne detection for early diagnosis of rheumatoid arthritis (RA), by demonstrating the tomographic imaging of acrylic phantom as well as the fundamental imaging properties. We expect that further refinements of the fiber-optic-based laser CT imaging system could lead to a novel and practical diagnostic tool for rheumatoid arthritis and other joint- and bone-related diseases in human finger.

Citation Download Citation

Yoshiaki Sasaki, Ryota Emori, Hiroki Inage, Masaki Goto, Ryo Takahashi, Tetsuya Yuasa, Hiroshi Taniguchi, Balasigamani Devaraj, and Takao Akatsuka "Infrared laser transillumination CT imaging system using parallel fiber arrays and optical switches for finger joint imaging", Proc. SPIE 5368, Medical Imaging 2004: Physics of Medical Imaging, (6 May 2004); https://doi.org/10.1117/12.534489

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
10 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Imaging systems

Heterodyning

Laser cutting

Signal attenuation

X-ray computed tomography

Optical arrays

Optical switching

Show All Keywords

Keywords/Phrases

Search In:

Publication Years