title: Terahertz spectroscopic imaging and properties of gastrointestinal tract in a rat model.
abstract: We have investigated basic properties of normal gastrointestinal (GI) tract tissues, including glandular stomach (GS), fore stomach (FS), large intestine (LI), small intestine (SI), and esophagus (ESO), from a rat model using terahertz (THz) reflection imaging and spectroscopy. The THz images collected from stratified squamous epithelia (SSE) of FS and ESO show a lower peak-to-peak value compared to those from columnar epithelia (CE) of GS, LI, or SI because the SSE contains less water than CE. The refractive index and absorption coefficient of FS were less than those of GS or LI, both having values similar to those of water. Additionally, we report internal reflection THz signals from ESO, although we were unable to determine the exact interface for this internal reflection.
authors.affiliation: Yonsei Institute of Convergence Technology, Yonsei University, Seoul 120-752, South Korea.
authors.forename: Young Bin
authors.initials: YB
authors.lastname: Ji
authors.affiliation: YUMS-KRIBB Medical Convergence Research Institute, College of Medicine, Yonsei University, Seoul 120-752, South Korea.
authors.forename: Sang-Hoon
authors.initials: SH
authors.lastname: Kim
authors.affiliation: Graduate Program for Nanomedical Science, Yonsei University, Seoul 120-749 South Korea.
authors.forename: Kiyoung
authors.initials: K
authors.lastname: Jeong
authors.affiliation: YUMS-KRIBB Medical Convergence Research Institute, College of Medicine, Yonsei University, Seoul 120-752, South Korea.
authors.forename: Yuna
authors.initials: Y
authors.lastname: Choi
authors.affiliation: Department of Physics, University of Seoul, Seoul 130-743, South Korea.
authors.forename: Joo-Hiuk
authors.initials: JH
authors.lastname: Son
authors.affiliation: Divsion of Advanced Materials Engineering, Chonbuk National University, Jeonju 561-756, South Korea ; Nano Materials Evaluation Center, Korea Research Institute of Standards and Science, Daejeon 305-340, South Korea.
authors.forename: Dong Woo
authors.initials: DW
authors.lastname: Park
authors.affiliation: Nano Materials Evaluation Center, Korea Research Institute of Standards and Science, Daejeon 305-340, South Korea.
authors.forename: Sam Kyu
authors.initials: SK
authors.lastname: Noh
authors.affiliation: Division of Electrical and Electronics Engineering, Korea Maritime University, Busan 606-791, South Korea.
authors.forename: Tae-In
authors.initials: TI
authors.lastname: Jeon
authors.affiliation: YUMS-KRIBB Medical Convergence Research Institute, College of Medicine, Yonsei University, Seoul 120-752, South Korea ; Department of Radiology, Severance Biomedical Science Institute, College of Medicine, Yonsei University, Seoul 120-752, South Korea.
authors.forename: Yong-Min
authors.initials: YM
authors.lastname: Huh
authors.affiliation: Yonsei Institute of Convergence Technology, Yonsei University, Seoul 120-752, South Korea ; Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul 120-749, South Korea.
authors.forename: Seungjoo
authors.initials: S
authors.lastname: Haam
authors.affiliation: Department of Medicine, College of Medicine, Yonsei University, Seoul 120-752, South Korea ; sklee@yuhs.ac.
authors.forename: Sang Kil
authors.initials: SK
authors.lastname: Lee
authors.affiliation: YUMS-KRIBB Medical Convergence Research Institute, College of Medicine, Yonsei University, Seoul 120-752, South Korea ; issac@yuhs.ac.
authors.forename: Seung Jae
authors.initials: SJ
authors.lastname: Oh
authors.affiliation: YUMS-KRIBB Medical Convergence Research Institute, College of Medicine, Yonsei University, Seoul 120-752, South Korea ; Department of Radiology, Severance Biomedical Science Institute, College of Medicine, Yonsei University, Seoul 120-752, South Korea.
authors.forename: Jin-Suck
authors.initials: JS
authors.lastname: Suh
keywords: (170.3880) Medical and biological imaging; (170.6510) Spectroscopy, tissue diagnostics; (170.6795) Terahertz imaging; (300.6495) Spectroscopy, terahertz