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:2/12/2016)... Columbus, OH (PRWEB) , ... February 12, 2016 , ... ... families of the greater Columbus, OH area. The latest campaign focuses on the fight ... the disease. Donations are now being accepted here . , Carmen is a ...
(Date:2/12/2016)... ... February 12, 2016 , ... J ... communities by continuing it’s commitment to act as Agents of Change in the ... closely with area homeless families to fulfill immediate needs and help them move ...
(Date:2/12/2016)... ... February 12, 2016 , ... US Sport Camps is pleased to ... Club, located in Norwalk, serves as the host site and directing the camps is ... “We have had successful camps in recent years around Des Moines and are fortunate ...
(Date:2/12/2016)... ... ... Yisrayl Hawkins, Pastor and Overseer at The House of Yahweh in Abilene, ... the real facts surrounding all those Bible stories. For generations families have gathered to ... Yisrayl says there is more to these than just mere “stories”. , The ...
(Date:2/11/2016)... (PRWEB) , ... February 12, 2016 , ... Fitbody Personal ... are a fun and exciting way to get fit and healthy. Located in Phoenixville, ... announces dates for a class designed for horseback riders who want to lose weight ...
Breaking Medicine News(10 mins):
(Date:2/12/2016)... 2016  Eli Lilly and Company (NYSE: LLY ) ... (pemetrexed disodium) vitamin regimen patent would not presently be infringed ... France , Italy and ... only with dextrose solution.  --> ... of Appeal held that Lilly,s patent would be indirectly infringed ...
(Date:2/12/2016)... , Ungarn, February 12, 2016 ... das sich auf den ungedeckten medizinischen Bedarf ... positive Ergebnisse seines klinischen Forschungsprogramms bekannt. Das ... beschäftigt, ergab Verbesserungen ihrer respiratorischen Funktionen und ... ltd , ein Medizintechnikunternehmen, das sich auf ...
(Date:2/11/2016)... Calif., Feb. 11, 2016 PRO-DEX, INC. (NasdaqCM: PDEX) ... ended December 31, 2015. The Company also filed its Quarterly ... year 2016 with the Securities and Exchange Commission today. ... 31, 2015 --> --> ... increased $2.6 million, or 95%, to $5.4 million from $2.8 ...
Breaking Medicine Technology: