Navigation Links
Polarized filter may reduce unnecessary cervical biopsies and surgeries

AUGUSTA, Ga. The same filtered light that enables sunglasses to reduce glare may improve a physician's ability to detect early signs of cervical cancer, reducing unnecessary biopsies and surgery.

Polarized light is more focused than traditional radial light which scatters in all directions, said Dr. Daron G. Ferris, colposcopist, family medicine physician and Director of the Gynecologic Cancer Prevention Center at Georgia Health Sciences University.

When a woman gets an abnormal Pap smear, it's often followed by a colposcopic exam where radial light and magnification are used to view the cervix then biopsies are performed on suspicious areas.

A National Cancer Institute-funded study is helping determine whether also taking a look through a polarized filter improves the ability to detect precancerous changes, enhancing efficacy while reducing needless biopsies and the discomfort and cost that may result.

"Using both types of light to examine the cervix may give us additional perspective so we can find more disease and avoid treating something that does not need it," Ferris said.

In the study of 300 women age 18 and older, Ferris is first using the standard approach, including marking suspicious areas, then taking another look with the polarized filter to see how the findings correlate before doing a biopsy. "If we use polarized light, how does that change what we can see?" he said.

The approach might be most effective in young women where normal immature cell types in the cervix are more difficult to discriminate from neoplastic cells. This extremely thin skin is an easy target for infection by human papillomavirus, the primary cause of cervical cancer, Ferris said.

"If polarized light eliminates cases where it's not clear whether the area is worrisome or not, that is going to reduce the number of biopsies," Ferris said. "We want to see if it adds value." And the confusion may not end with the biopsy: sometimes biopsies also are misinterpreted, leading to unnecessary surgery.

Just as polarized glasses help fisherman see fish swimming below the water surface, polarized light, which focuses its energy in one direction, also enables physicians to better see beneath the surface of the cervix for telltale signs of trouble. In suspicious areas, blood vessels tend to be more dilated, farther apart and more randomly distributed. "We normally look at superficial blood vessels, but this takes us to a level we have not been able to see," said Ferris of the ability to see 1 millimeter (.04 inches) below the surface with the polarized filter.

Ferris got the idea that polarized light might enhance colposcopy from studying hundreds of images of the cervix taken for fluorescent spectroscopy, which uses a polarized filter to reduce the reflection created by fluorescent light. "I started seeing things that I had never seen before and it struck me that it might be of use in colposcopy," said Ferris, who was part of a study trying to teach computers to recognize cervical lesions.

Dermatologists have been using polarized filters for years to look at external skin surfaces. Some colposcopy machines, where the cervix is viewed through a monitor rather than a microscope, already are equipped with a polarized light filter to reduce glare. Most colposcopes now have green filters that block red light so blood vessels appear black and are easier to detect.

Studies have questioned colposcopy's accuracy. Two National Cancer Institute researchers concluded in a 2006 article in the American Journal of Obstetrics and Gynecology that colposcopy was missing cancerous lesions and efforts to improve accuracy were needed.

The bagel-shaped cervix is the door to the uterus, which produces mucus and helps keep a fetus in the womb during pregnancy. Biopsies of the thin-skinned organ can result in bleeding and increase infection risk.


Contact: Toni Baker
Georgia Health Sciences University

Related medicine news :

1. University of Tennessee microbiologist to develop biofilter to clean-up toxic water
2. New material for air cleaner filters that captures flu viruses
3. HEPA Filter May Improve Air Near Wood-Burning Stoves
4. Some Severe MS Flares Helped by Blood Filtering Treatment
5. Latest American Chemical Society podcast: New water filter kills disease-causing bacteria
6. Filtering donor blood reduces heart, lung complications
7. Oransi HEPA Air Purifiers Include 3 Free Filters from June 23 through July 6 – A $200+ Savings
8. UniteU and Celebros Launch Dynamic Cross-Sell and New Version of Filtered Navigation Search
9. Fantastic Fan Filters LLC Unveils Feature Product on the Web
10. Fantastic Fan Filters LLC Unveils Feature Product on the Web
11. Launch of On Time Air Filters: Home Air Filter Delivery Service Helps Homeowners Replace All-Important Home HVAC Filters On Time
Post Your Comments:
Related Image:
Polarized filter may reduce unnecessary cervical biopsies and surgeries
(Date:6/25/2016)... California (PRWEB) , ... June 25, 2016 , ... "With ... fit their specific project," said Christina Austin - CEO of Pixel Film Studios. ... customizable and all within Final Cut Pro X . Simply select a ProHand ...
(Date:6/25/2016)... ... 25, 2016 , ... Dr. Calvin Johnson has dedicated his ... implemented orthobiologic procedures as a method for treating his patients. The procedure is ... to perform the treatment. Orthobiologics are substances that orthopaedic surgeons use to help ...
(Date:6/24/2016)... ... June 24, 2016 , ... A recent article published June 14 ... The article goes on to state that individuals are now more comfortable seeking to ... operations such as calf and cheek reduction. The Los Angeles area medical group, Beverly ...
(Date:6/24/2016)... ... ... Marcy was in a crisis. Her son James, eight, was out of control. Prone to ... , “When something upset him, he couldn’t control his emotions,” remembers Marcy. “If there ... my other children and say he was going to kill them. If we were ...
(Date:6/24/2016)... (PRWEB) , ... June 24, 2016 , ... ... now offering micro-osteoperforation for accelerated orthodontic treatment. Dr. Cheng has extensive experience with ... Damon brackets , AcceleDent, and accelerated osteogenic orthodontics. , Micro-osteoperforation is a ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... Research and Markets has announced ... Type (Organic Chemical (Sugar, Petrochemical, Glycerin), Inorganic Chemical), Functionality ... - Global Forecast to 2021" report to their ... global pharmaceutical excipients market is projected to reach USD ... in the forecast period 2016 to 2021. ...
(Date:6/23/2016)... -- Roche (SIX: RO, ROG; OTCQX: RHHBY) announced that ... PCT (procalcitonin) assay as a dedicated testing solution for ... clearance, Roche is the first IVD company in the ... risk assessment and management. PCT is a ... in blood can aid clinicians in assessing the risk ...
(Date:6/23/2016)... 2016 Capricor Therapeutics, Inc. ... biotechnology company focused on the discovery, development and ... enrollment in its ongoing randomized HOPE-Duchenne clinical trial ... of its 24-patient target. Capricor expects the trial ... of 2016, and to report top line data ...
Breaking Medicine Technology: