PMID- 26720052
OWN - NLM
STAT- MEDLINE
DCOM- 20160922
LR  - 20190930
IS  - 1560-2281 (Electronic)
IS  - 1083-3668 (Linking)
VI  - 21
IP  - 7
DP  - 2016 Jul
TI  - Averaged subtracted polarization imaging for endoscopic diagnostics of surface 
      microstructures on translucent mucosae.
PG  - 71105
LID - 10.1117/1.JBO.21.7.071105 [doi]
AB  - An endoscopic image processing technique for enhancing the appearance of 
      microstructures on translucent mucosae is described. This technique employs two 
      pairs of co- and cross-polarization images under two different linearly polarized 
      lights, from which the averaged subtracted polarization image (AVSPI) is 
      calculated. Experiments were then conducted using an acrylic phantom and excised 
      porcine stomach tissue using a manual experimental setup with ring-type lighting, 
      two rotating polarizers, and a color camera; better results were achieved with 
      the proposed method than with conventional color intensity image processing. An 
      objective evaluation method that uses texture analysis was developed and used to 
      evaluate the enhanced microstructure images. This paper introduces two types of 
      online, rigid-type, polarimetric endoscopic implementations using a polarized 
      ring-shaped LED and a polarimetric camera. The first type uses a 
      beam-splitter-type color polarimetric camera, and the second uses a single-chip 
      monochrome polarimetric camera. Microstructures on the mucosa surface were 
      enhanced robustly with these online endoscopes regardless of the difference in 
      the extinction ratio of each device. These results show that polarimetric 
      endoscopy using AVSPI is both effective and practical for hardware 
      implementation.
FAU - Kanamori, Katsuhiro
AU  - Kanamori K
LA  - eng
PT  - Journal Article
PL  - United States
TA  - J Biomed Opt
JT  - Journal of biomedical optics
JID - 9605853
SB  - IM
MH  - Animals
MH  - Endoscopy/*methods
MH  - Gastric Mucosa/*anatomy & histology/*chemistry
MH  - Image Processing, Computer-Assisted/*methods
MH  - Phantoms, Imaging
MH  - Swine
EDAT- 2016/01/01 06:00
MHDA- 2016/09/23 06:00
CRDT- 2016/01/01 06:00
PHST- 2015/09/17 00:00 [received]
PHST- 2015/11/24 00:00 [accepted]
PHST- 2016/01/01 06:00 [entrez]
PHST- 2016/01/01 06:00 [pubmed]
PHST- 2016/09/23 06:00 [medline]
AID - 2479716 [pii]
AID - 10.1117/1.JBO.21.7.071105 [doi]
PST - ppublish
SO  - J Biomed Opt. 2016 Jul;21(7):71105. doi: 10.1117/1.JBO.21.7.071105.