Navigation Links
Optimal band imaging with endoscopy facilitates the diagnosis of depressed-type early gastric cancer
Date:2/18/2008

OAK BROOK, Ill. February 18, 2008 A study from the Jichi Medical University in Japan shows that optimal band imaging used with an endoscope provided images that clearly identified depressed-type early gastric cancer without magnification in 96 percent of study participants. The study appears in the February issue of Gastrointestinal Endoscopy, the monthly peer-reviewed scientific journal of the American Society for Gastrointestinal Endoscopy.

Gastric cancer is one of the most prevalent types of cancer in the world. If gastric cancer is found early, the five-year survival rate increases nearly 90 percent. In contrast, most patients with advanced gastric cancer have a poor prognosis. Gastric cancer is classified as elevated, flat and depressed types. Despite improvements in endoscopic technologies, depressed-type early gastric cancer is challenging to diagnose because it manifests as subtle changes in color and shape. Variations in color, however, can also mean inflammation, so it is difficult to determine what is benign and what is malignant. Therefore, biopsies must then be taken.

In our comparative study, the optimal band imaging system with endoscopy showed contrasting images that could delineate the depressed-type early gastric cancers more easily than conventional endoscopy, said the studys lead author Hiroyuki Osawa, MD, Jichi Medical University. A distinct demarcation was observed endoscopically between the reddish images of the cancerous lesion and the yellowish images of the surrounding noncancerous area. This is the first report of optimal band images for early gastric cancer.

Optimal band imaging (OBI) was developed with the aim of enhancing the capillary pattern and pit patterns of lesions in endoscopic images. In contrast to narrow band imaging, in which the bandwidth of spectral transmittance is narrowed by optical filters, the OBI system is based on a new spectral estimation technique that replaces the need for optical filters. OBI takes an ordinary endoscopic image from the video processor and arithmetically processes the reflected photons to reconstitute virtual images for a choice of different wavelengths.

Patients and Methods

An OBI system with electronic endoscope for the upper-gastrointestinal tract was used in this prospective study. Twenty-seven patients between May and December 2006 who were diagnosed with conventional endoscopy as having depressed-type early gastric cancer participated in the study. The mean age of the patients was 65.3 years with 23 men and four women. Twenty-four patients were diagnosed with differentiated adenocarcinoma and three patients with undifferentiated adenocarcinoma by the histopathologic evaluation of biopsy specimens. Researchers used the OBI system without magnification to observe the entire stomach because of the ample light intensity.

Results

With the OBI system, depressed type-early gastric cancer in 26 of 27 cases were easily identified because it clearly showed contrasting demarcation lines between the reddish images of the cancerous lesions and the yellowish images of the surrounding noncancerous area. A 40-fold magnification was then applied to observe the pit pattern, the disappearance of pit pattern or an irregular microvascular pattern of the cancerous lesions. This further enhanced the demarcation of the cancer and the noncancerous areas.

Researchers concluded that OBI images were better than conventional endoscopy images in identifying depressed-type early gastric cancer, but said that further study is warranted. They noted that even medical students, who had not had considerable amounts of clinical endoscopic experience, were able to easily identify the demarcation line between cancer and noncancerous areas in optimal band images versus conventional endoscopic images. OBI is available even without magnification during routine endoscopy because the system provides the same light intensity as conventional endoscopy. The researchers stated that such nonmagnified optimal band images may be ideal for screening, whereas magnified optimal band images are more suitable for detailed examination of early gastric cancer.


'/>"/>

Contact: Anne Brownsey
abrownsey@asge.org
630-570-5635
American Society for Gastrointestinal Endoscopy
Source:Eurekalert

Related medicine news :

1. Optimal systemic and splanchnic hemodynamic state after living-donor liver transplantation
2. In largest U.S. Hep C trial, researchers determine weight-based dosing is key to optimal treatment
3. Join the Vitamin D Revolution: How to Get 30 Minutes of Daily Sunshine for Optimal Health
4. Brain imaging reveals breakdown of normal emotional processing
5. Clarity Imaging International, Inc. Rolls Out Mobile DEXA Program
6. Fry Construction Selected for High-Profile Medical Imaging Project
7. Elbit Medical Imaging Ltd. Announces Publication of a Prospectus in Israel
8. Ultrasonix Adds Global Medical Imaging Into Its North American Sales Force
9. Imaging Software Helps Track, Treat Injured Brains
10. SNM seeks novel approaches to molecular imaging to showcase at annual meeting
11. SNM seeks novel approaches to molecular imaging to showcase at annual meeting
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/13/2017)... ... October 13, 2017 , ... Global Healthcare Management’s 4th Annual Kids Fun Run ... This free event, sponsored by Global Healthcare Management’s CEO, Jon Letko, is aimed ... geared towards children of all ages; it is a non-competitive, non-timed event, which is ...
(Date:10/13/2017)... ... October 13, 2017 , ... “The Journey: From the Mountains to the Mission ... lost souls in the Philippines. “The Journey: From the Mountains to the Mission Field” ... the Bible. She has taught all ages and currently teaches a class of ladies ...
(Date:10/12/2017)... , ... October 12, 2017 , ... Planet Fitness, one ... U.S., announced today its plans to open a flagship location in Covington, LA at ... former Rooms To Go store next to Office Depot in the Holiday Square shopping ...
(Date:10/12/2017)... ... October 12, 2017 , ... Asante, a ... health care, have expanded their existing home health joint venture through an agreement, ... been operating a joint venture home health company with Asante, delivering clinically integrated ...
(Date:10/12/2017)... ... October 12, 2017 , ... Leading pediatric oncology experts at ... for the 49th Congress of the International Society of Paediatric Oncology (SIOP) ... Center for Cancer and Blood Disorders at Children’s National, and Stephen P. ...
Breaking Medicine News(10 mins):
(Date:10/2/2017)... 2017  AllianceRx Walgreens Prime, the combined central specialty ... pharmacy benefit manager Prime Therapeutics LLC (Prime), today officially ... the unveiling of new signage at its headquarters in ... at a few other company-owned facilities across the country. ... some of whom will begin to see the AllianceRx ...
(Date:9/27/2017)... Sept. 27, 2017  Commended for their devotion to personalized ... Ranked as number one in the South Florida Business Journal,s ... Inc. 5000 yearly list, the national specialty pharmacy has found ... Bardisa will soon be honored by SFBJ as the ... Set to receive his award in October, Bardisa ...
(Date:9/22/2017)... 22, 2017  As the latest Obamacare repeal effort ... Cassidy (R-LA) and Lindsey Graham (R-SC) ... medical device industry is in an odd place.  The ... 2.3% excise tax on medical device sales passed along ... covered patients, increased visits and hospital customers with the ...
Breaking Medicine Technology: